; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt < %s -passes=memcpyopt -verify-memoryssa -S | FileCheck %s
%struct.Foo = type { i32, i32, i32 }
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg)
declare void @llvm.memcpy.p1.p0.i64(ptr addrspace(1) noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg)
declare void @llvm.memcpy.p2.p1.i64(ptr addrspace(2) noalias nocapture writeonly, ptr addrspace(1) noalias nocapture readonly, i64, i1 immarg)
declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1 immarg)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
declare void @llvm.lifetime.start.p0(i64, ptr nocapture)
declare void @llvm.lifetime.end.p0(i64, ptr nocapture)
declare void @llvm.lifetime.start.p1(i64, ptr addrspace(1) nocapture)
declare void @llvm.lifetime.end.p1(i64, ptr addrspace(1) nocapture)
declare void @llvm.lifetime.start.p2(i64, ptr addrspace(2) nocapture)
declare void @llvm.lifetime.end.p2(i64, ptr addrspace(2) nocapture)
declare i32 @use_nocapture(ptr nocapture)
declare i32 @use_maycapture(ptr noundef)
declare i32 @use_readonly(ptr readonly)
declare i32 @use_writeonly(ptr noundef) memory(write)
define void @basic_memcpy() {
; CHECK-LABEL: define void @basic_memcpy() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
define i32 @use_not_dominated_by_src_alloca() {
; CHECK-LABEL: define i32 @use_not_dominated_by_src_alloca() {
; CHECK-NEXT: [[SRC:%.*]] = alloca i8, align 4
; CHECK-NEXT: [[DEST_GEP:%.*]] = getelementptr i64, ptr [[SRC]], i64 -1
; CHECK-NEXT: [[DEST_USE:%.*]] = load i8, ptr [[DEST_GEP]], align 1
; CHECK-NEXT: ret i32 0
;
%dest = alloca i1, align 1
; Replacing the use of dest with src causes no domination uses.
%dest.gep = getelementptr i64, ptr %dest, i64 -1
%dest.use = load i8, ptr %dest.gep, align 1
%src = alloca i8, align 4
%src.val = load i1, ptr %src, align 4
store i1 %src.val, ptr %dest, align 1
ret i32 0
}
define void @basic_memmove() {
; CHECK-LABEL: define void @basic_memmove() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memmove.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that the optimization succeeds with a load/store pair.
define void @load_store() {
; CHECK-LABEL: define void @load_store() {
; CHECK-NEXT: [[SRC:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 42, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca i32, align 4
%dest = alloca i32, align 4
call void @llvm.lifetime.start.p0(i64 4, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 4, ptr nocapture %dest)
store i32 42, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
%src.val = load i32, ptr %src
store i32 %src.val, ptr %dest
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 4, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 4, ptr nocapture %dest)
ret void
}
; Test scalable vectors.
define void @load_store_scalable(<vscale x 4 x i32> %x) {
; CHECK-LABEL: define void @load_store_scalable
; CHECK-SAME: (<vscale x 4 x i32> [[X:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca <vscale x 4 x i32>, align 16
; CHECK-NEXT: store <vscale x 4 x i32> [[X]], ptr [[SRC]], align 16
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca <vscale x 4 x i32>
%dest = alloca <vscale x 4 x i32>
call void @llvm.lifetime.start.p0(i64 -1, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 -1, ptr nocapture %dest)
store <vscale x 4 x i32> %x, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
%src.val = load <vscale x 4 x i32>, ptr %src
store <vscale x 4 x i32> %src.val, ptr %dest
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 -1, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 -1, ptr nocapture %dest)
ret void
}
; Tests that merging two allocas shouldn't be more poisonous, smaller aligned src is valid.
define void @align_up() {
; CHECK-LABEL: define void @align_up() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 8
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 8
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that we correctly remove extra lifetime intrinsics when performing the
; optimization.
define void @remove_extra_lifetime_intrinsics() {
; CHECK-LABEL: define void @remove_extra_lifetime_intrinsics() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
%3 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that we won't insert lifetime markers if they don't exist originally.
define void @no_lifetime() {
; CHECK-LABEL: define void @no_lifetime() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
%3 = call i32 @use_nocapture(ptr nocapture %dest)
ret void
}
; Tests that aliasing src or dest but no modification desn't prevent transformations.
define void @alias_no_mod() {
; CHECK-LABEL: define void @alias_no_mod() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST_ALIAS:%.*]] = getelementptr [[STRUCT_FOO]], ptr [[SRC]], i32 0, i32 0
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[SRC_ALIAS:%.*]] = getelementptr [[STRUCT_FOO]], ptr [[SRC]], i32 0, i32 0
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
%dest.alias = getelementptr %struct.Foo, ptr %dest, i32 0, i32 0
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%src.alias = getelementptr %struct.Foo, ptr %src, i32 0, i32 0
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Scope domain
!0 = !{!0}
; Scope in that domain
!1 = !{!1, !0}
; Scope list
!2 = !{!1}
!3 = !{!"Whatever"}
; Tests that we remove scoped noalias metadata from a call.
define void @remove_scoped_noalias() {
; CHECK-LABEL: define void @remove_scoped_noalias() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]]), !alias.scope !0
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src), !alias.scope !2
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
%2 = call i32 @use_nocapture(ptr nocapture %dest), !noalias !2
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that we remove metadata on the merged alloca.
define void @remove_alloca_metadata() {
; CHECK-LABEL: define void @remove_alloca_metadata() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]]), !alias.scope !0
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4, !annotation !3
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src), !alias.scope !2
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr nocapture %dest), !noalias !2
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that we remove scoped noalias metadata from a call.
; And confirm that don't crash on noalias metadata on lifetime markers.
define void @noalias_on_lifetime() {
; CHECK-LABEL: define void @noalias_on_lifetime() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]]), !alias.scope !0
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src), !alias.scope !2
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src), !alias.scope !2
%2 = call i32 @use_nocapture(ptr nocapture %dest), !noalias !2
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest), !noalias !2
ret void
}
; Tests that we can merge alloca if the dest and src has only refs except lifetime intrinsics.
define void @src_ref_dest_ref_after_copy() {
; CHECK-LABEL: define void @src_ref_dest_ref_after_copy() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_readonly(ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_readonly(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%1 = call i32 @use_readonly(ptr nocapture %src)
%2 = call i32 @use_readonly(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that we can merge alloca if the dest and src has only mods.
define void @src_mod_dest_mod_after_copy() {
; CHECK-LABEL: define void @src_mod_dest_mod_after_copy() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_writeonly(ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_writeonly(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%1 = call i32 @use_writeonly(ptr nocapture %src)
%2 = call i32 @use_writeonly(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
define void @avoid_memory_use_last_user_crash() {
; CHECK-LABEL: define void @avoid_memory_use_last_user_crash() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[SRC]], align 4
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
%v = load i32, ptr %dest
ret void
}
; For multi-bb patch, we will insert it for next immediate post dominator block.
define void @terminator_lastuse() personality i32 0 {
; CHECK-LABEL: define void @terminator_lastuse() personality i32 0 {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[RV:%.*]] = invoke i32 @use_nocapture(ptr [[SRC]])
; CHECK-NEXT: to label [[SUC:%.*]] unwind label [[UNW:%.*]]
; CHECK: unw:
; CHECK-NEXT: [[LP:%.*]] = landingpad i32
; CHECK-NEXT: cleanup
; CHECK-NEXT: resume i32 0
; CHECK: suc:
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
call void @llvm.lifetime.end.p0(i64 12, ptr %src)
%rv = invoke i32 @use_nocapture(ptr %dest)
to label %suc unwind label %unw
unw:
%lp = landingpad i32 cleanup
resume i32 0
suc:
ret void
}
define void @multi_bb_memcpy(i1 %b) {
; CHECK-LABEL: define void @multi_bb_memcpy
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 42, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: br label [[BB0:%.*]]
; CHECK: bb0:
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca i32, align 4
%dest = alloca i32, align 4
call void @llvm.lifetime.start.p0(i64 4, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 4, ptr nocapture %dest)
store i32 42, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
br label %bb0
bb0:
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 4, i1 false)
br label %bb1
bb1:
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 4, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 4, ptr nocapture %dest)
ret void
}
define void @multi_bb_load_store(i1 %b) {
; CHECK-LABEL: define void @multi_bb_load_store
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca i32, align 4
; CHECK-NEXT: store i32 42, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: br label [[BB0:%.*]]
; CHECK: bb0:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca i32, align 4
%dest = alloca i32, align 4
call void @llvm.lifetime.start.p0(i64 4, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 4, ptr nocapture %dest)
store i32 42, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
%src.val = load i32, ptr %src
store i32 %src.val, ptr %dest
br label %bb0
bb0:
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 4, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 4, ptr nocapture %dest)
ret void
}
; FIXME: merge allocas for bb-separated, but logically straight.
; We might be handle those load/store MemCpyOpt totally
define void @multi_bb_separated_load_store(i1 %b) {
; CHECK-LABEL: define void @multi_bb_separated_load_store
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nocapture [[DEST]])
; CHECK-NEXT: store i32 42, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: [[SRC_VAL:%.*]] = load i32, ptr [[SRC]], align 4
; CHECK-NEXT: br label [[BB0:%.*]]
; CHECK: bb0:
; CHECK-NEXT: store i32 [[SRC_VAL]], ptr [[DEST]], align 4
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca i32, align 4
%dest = alloca i32, align 4
call void @llvm.lifetime.start.p0(i64 4, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 4, ptr nocapture %dest)
store i32 42, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
%src.val = load i32, ptr %src
br label %bb0
bb0:
store i32 %src.val, ptr %dest
br label %bb1
bb1:
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 4, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 4, ptr nocapture %dest)
ret void
}
define void @multi_bb_simple_br(i1 %b) {
; CHECK-LABEL: define void @multi_bb_simple_br
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br i1 [[B]], label [[BB0:%.*]], label [[BB1:%.*]]
; CHECK: bb0:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr noundef nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
br i1 %b, label %bb0, label %bb1
bb0:
%2 = call i32 @use_nocapture(ptr noundef nocapture %dest)
br label %bb2
bb1:
%3 = call i32 @use_nocapture(ptr noundef nocapture %dest)
br label %bb2
bb2:
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Test for BasicBlock and Instruction mixed dominator finding.
define void @multi_bb_dom_test0(i1 %b) {
; CHECK-LABEL: define void @multi_bb_dom_test0
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: br i1 [[B]], label [[BB0:%.*]], label [[BB1:%.*]]
; CHECK: bb0:
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: br label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 40, i32 50, i32 60 }, ptr [[SRC]], align 4
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
br i1 %b, label %bb0, label %bb1
bb0:
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
br label %bb2
bb1:
store %struct.Foo { i32 40, i32 50, i32 60 }, ptr %src
br label %bb2
bb2:
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%1 = call i32 @use_nocapture(ptr noundef nocapture %dest)
ret void
}
; Test for BasicBlock and Instruction mixed dominator finding.
define void @multi_bb_dom_test1(i1 %b) {
; CHECK-LABEL: define void @multi_bb_dom_test1
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: br i1 [[B]], label [[BB0:%.*]], label [[BB1:%.*]]
; CHECK: bb0:
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: br label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 40, i32 50, i32 60 }, ptr [[SRC]], align 4
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[DEST]])
; CHECK-NEXT: ret void
; CHECK: unr:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[DEST]])
; CHECK-NEXT: br label [[BB2]]
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
br i1 %b, label %bb0, label %bb1
bb0:
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
br label %bb2
bb1:
store %struct.Foo { i32 40, i32 50, i32 60 }, ptr %src
br label %bb2
bb2:
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false); 1
%1 = call i32 @use_nocapture(ptr noundef nocapture %dest)
ret void
unr:
%2 = call i32 @use_nocapture(ptr noundef nocapture %dest)
br label %bb2
}
; Test for BasicBlock and Instruction mixed post-dominator finding.
define void @multi_bb_pdom_test0(i1 %b) {
; CHECK-LABEL: define void @multi_bb_pdom_test0
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: br i1 [[B]], label [[BB0:%.*]], label [[BB1:%.*]]
; CHECK: bb0:
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false); 1
br i1 %b, label %bb0, label %bb1
bb0:
%1 = call i32 @use_nocapture(ptr noundef nocapture %dest)
br label %bb2
bb1:
%2 = call i32 @use_nocapture(ptr noundef nocapture %dest)
br label %bb2
bb2:
%3 = call i32 @use_nocapture(ptr noundef nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
uselistorder ptr %dest, { 2, 3, 0, 1, 4, 5 }
}
; Test for inserting lifetime.end after the phi-node
define void @multi_bb_pdom_test1(i1 %b) {
; CHECK-LABEL: define void @multi_bb_pdom_test1
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: br i1 [[B]], label [[BB0:%.*]], label [[BB1:%.*]]
; CHECK: bb0:
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ 42, [[BB0]] ], [ 41, [[BB1]] ]
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false); 1
br i1 %b, label %bb0, label %bb1
bb0:
%1 = call i32 @use_nocapture(ptr noundef nocapture %dest)
br label %bb2
bb1:
%2 = call i32 @use_nocapture(ptr noundef nocapture %dest)
br label %bb2
bb2:
%i = phi i32 [ 42, %bb0 ], [ 41, %bb1 ]
ret void
}
; Test for existing unreachable cycle
define void @multi_bb_pdom_test2(i1 %b) {
; CHECK-LABEL: define void @multi_bb_pdom_test2
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: ret void
; CHECK: unr1:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br label [[UNR2:%.*]]
; CHECK: unr2:
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br label [[UNR1:%.*]]
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false); 1
%1 = call i32 @use_nocapture(ptr noundef nocapture %dest)
ret void
unr1:
%2 = call i32 @use_nocapture(ptr noundef nocapture %dest)
br label %unr2
unr2:
%3 = call i32 @use_nocapture(ptr noundef nocapture %dest)
br label %unr1
}
define void @multi_bb_loop(i32 %n) {
; CHECK-LABEL: define void @multi_bb_loop
; CHECK-SAME: (i32 [[N:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[NLT1:%.*]] = icmp slt i32 [[N]], 1
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 8
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 0, i32 1, i32 42 }, ptr [[SRC]], align 4
; CHECK-NEXT: br i1 [[NLT1]], label [[LOOP_EXIT:%.*]], label [[LOOP_BODY:%.*]]
; CHECK: loop_body:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[NEW_I:%.*]], [[LOOP_BODY]] ], [ 1, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[NEW_I]] = add i32 [[I]], 1
; CHECK-NEXT: store i32 [[NEW_I]], ptr [[SRC]], align 4
; CHECK-NEXT: [[IGTN:%.*]] = icmp sgt i32 [[NEW_I]], [[N]]
; CHECK-NEXT: br i1 [[IGTN]], label [[LOOP_EXIT]], label [[LOOP_BODY]]
; CHECK: loop_exit:
; CHECK-NEXT: ret void
;
entry:
%nlt1 = icmp slt i32 %n, 1
%src = alloca %struct.Foo, align 8
%dest = alloca %struct.Foo, align 8
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 0, i32 1, i32 42 }, ptr %src
br i1 %nlt1, label %loop_exit, label %loop_body
loop_body:
%i = phi i32 [ %new_i, %loop_body ], [ 1, %entry ]
call void @llvm.memcpy.p0.p0.i64(ptr align 8 %dest, ptr align 8 %src, i64 12, i1 false)
%new_i = add i32 %i, 1
store i32 %new_i, ptr %src
%igtn = icmp sgt i32 %new_i, %n
br i1 %igtn, label %loop_exit, label %loop_body
loop_exit:
ret void
}
define void @multi_bb_unreachable_modref(i1 %b0) {
; CHECK-LABEL: define void @multi_bb_unreachable_modref
; CHECK-SAME: (i1 [[B0:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br i1 [[B0]], label [[BB0:%.*]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: ret void
; CHECK: bb0:
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr noundef nocapture %src)
br i1 %b0, label %bb0, label %exit
exit:
%2 = call i32 @use_nocapture(ptr noundef nocapture %src)
ret void
bb0:
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
define void @multi_bb_non_dominated(i1 %b0, i1 %b1) {
; CHECK-LABEL: define void @multi_bb_non_dominated
; CHECK-SAME: (i1 [[B0:%.*]], i1 [[B1:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br i1 [[B0]], label [[BB0:%.*]], label [[BB1:%.*]]
; CHECK: bb0:
; CHECK-NEXT: br label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr noundef nocapture %src)
br i1 %b0, label %bb0, label %bb1
bb0:
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
br label %bb2
bb1:
%2 = call i32 @use_nocapture(ptr noundef nocapture %src)
br label %bb2
bb2:
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; TODO: to merge following `is_def` cases, we need to do liveness analysis
; or something that distinguish the full-size-Mod as a Def.
; Tests that a memcpy that completely overwrites a stack value is a definition
; for the purposes of liveness analysis.
define void @memcpy_is_def() {
; CHECK-LABEL: define void @memcpy_is_def() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[DEST]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[SRC]], ptr align 4 [[DEST]], i64 12, i1 false)
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr noundef nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr noundef nocapture %dest)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %src, ptr align 4 %dest, i64 12, i1 false)
%3 = call i32 @use_nocapture(ptr noundef nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; TODO: merge allocas
; Tests that a memset that completely overwrites a stack value is a definition
; for the purposes of liveness analysis.
define void @memset_is_def() {
; CHECK-LABEL: define void @memset_is_def() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[DEST]])
; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 4 [[SRC]], i8 42, i64 12, i1 false)
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr noundef nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr noundef nocapture %dest)
call void @llvm.memset.p0.i64(ptr align 4 %src, i8 42, i64 12, i1 false)
%3 = call i32 @use_nocapture(ptr noundef nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; TODO: merge allocas
; Tests that a store that completely overwrites a stack value is a definition
; for the purposes of liveness analysis.
define void @store_is_def() {
; CHECK-LABEL: define void @store_is_def() {
; CHECK-NEXT: [[SRC:%.*]] = alloca i32, align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca i32, align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 4, ptr nocapture [[DEST]])
; CHECK-NEXT: store i32 42, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[SRC]], align 4
; CHECK-NEXT: store i32 [[TMP2]], ptr [[DEST]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[DEST]])
; CHECK-NEXT: store i32 64, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP4:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 4, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca i32, align 4
%dest = alloca i32, align 4
call void @llvm.lifetime.start.p0(i64 4, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 4, ptr nocapture %dest)
store i32 42, ptr %src
%1 = call i32 @use_nocapture(ptr noundef nocapture %src)
%2 = load i32, ptr %src
store i32 %2, ptr %dest
%3 = call i32 @use_nocapture(ptr noundef nocapture %dest)
store i32 64, ptr %src
%4 = call i32 @use_nocapture(ptr noundef nocapture %src)
call void @llvm.lifetime.end.p0(i64 4, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 4, ptr nocapture %dest)
ret void
}
; TODO: merge src and dest, because any execution path doesn't cause conflicts.
; Tests that exists modref for both src/dest, but it never conflict on the execution.
define void @multi_bb_dataflow(i1 %b) {
; CHECK-LABEL: define void @multi_bb_dataflow
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: br i1 [[B]], label [[BB0:%.*]], label [[BB1:%.*]]
; CHECK: bb0:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[DEST]])
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr noundef nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
br i1 %b, label %bb0, label %bb1
bb0:
%2 = call i32 @use_nocapture(ptr noundef nocapture %src)
br label %bb2
bb1:
%3 = call i32 @use_nocapture(ptr noundef nocapture %dest)
br label %bb2
bb2:
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Optimization failures follow:
; Tests that a memcpy that doesn't completely overwrite a stack value is a use
; for the purposes of liveness analysis, not a definition.
define void @incomplete_memcpy() {
; CHECK-LABEL: define void @incomplete_memcpy() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 11, i1 false)
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr noundef nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 11, i1 false)
%2 = call i32 @use_nocapture(ptr noundef nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that a store that doesn't completely overwrite a stack value is a use
; for the purposes of liveness analysis, not a definition.
define void @incomplete_store() {
; CHECK-LABEL: define void @incomplete_store() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[SRC]], align 4
; CHECK-NEXT: store i32 [[TMP2]], ptr [[DEST]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr noundef nocapture %src)
%2 = load i32, ptr %src
store i32 %2, ptr %dest
%3 = call i32 @use_nocapture(ptr noundef nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that dynamically-sized allocas are never merged.
define void @dynamically_sized_alloca(i64 %i) {
; CHECK-LABEL: define void @dynamically_sized_alloca
; CHECK-SAME: (i64 [[I:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca i8, i64 [[I]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca i8, i64 [[I]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 -1, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 -1, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO:%.*]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 -1, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 -1, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca i8, i64 %i, align 4
%dest = alloca i8, i64 %i, align 4
call void @llvm.lifetime.start.p0(i64 -1, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 -1, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 -1, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 -1, ptr nocapture %dest)
ret void
}
; Tests that inalloca attributed allocas are never merged, to prevent stacksave/stackrestore handling.
define void @inalloca() {
; CHECK-LABEL: define void @inalloca() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca inalloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca inalloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that a memcpy with a dynamic size is never optimized.
define void @dynamically_sized_memcpy(i64 %size) {
; CHECK-LABEL: define void @dynamically_sized_memcpy
; CHECK-SAME: (i64 [[SIZE:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 [[SIZE]], i1 false)
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 %size, i1 false)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
ret void
}
; Tests that allocas with different sizes aren't merged together.
define void @mismatched_alloca_size() {
; CHECK-LABEL: define void @mismatched_alloca_size() {
; CHECK-NEXT: [[SRC:%.*]] = alloca i8, i64 24, align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca i8, i64 12, align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 24, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO:%.*]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 24, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca i8, i64 24, align 4
%dest = alloca i8, i64 12, align 4
call void @llvm.lifetime.start.p0(i64 24, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 24, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that allocas with mismatched address spaces aren't combined.
define void @mismatched_alloca_addrspace() {
; CHECK-LABEL: define void @mismatched_alloca_addrspace() {
; CHECK-NEXT: [[SRC:%.*]] = alloca i8, i64 24, align 4, addrspace(1)
; CHECK-NEXT: [[DEST:%.*]] = alloca i8, i64 12, align 4, addrspace(2)
; CHECK-NEXT: call void @llvm.lifetime.start.p1(i64 24, ptr addrspace(1) nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p2(i64 12, ptr addrspace(2) nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO:%.*]] { i32 10, i32 20, i32 30 }, ptr addrspace(1) [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr addrspace(1) nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p2.p1.i64(ptr addrspace(2) align 4 [[DEST]], ptr addrspace(1) align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: call void @llvm.lifetime.end.p1(i64 24, ptr addrspace(1) nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr addrspace(2) nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p2(i64 12, ptr addrspace(2) nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca i8, i64 24, align 4, addrspace(1)
%dest = alloca i8, i64 12, align 4, addrspace(2)
call void @llvm.lifetime.start.p1(i64 24, ptr addrspace(1) nocapture %src)
call void @llvm.lifetime.start.p2(i64 12, ptr addrspace(2) nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr addrspace(1) %src
%1 = call i32 @use_nocapture(ptr addrspace(1) nocapture %src)
call void @llvm.memcpy.p2.p1.i64(ptr addrspace(2) align 4 %dest, ptr addrspace(1) align 4 %src, i64 12, i1 false)
call void @llvm.lifetime.end.p1(i64 24, ptr addrspace(1) nocapture %src)
%2 = call i32 @use_nocapture(ptr addrspace(2) nocapture %dest)
call void @llvm.lifetime.end.p2(i64 12, ptr addrspace(2) nocapture %dest)
ret void
}
; Tests that volatile memcpys aren't removed.
define void @volatile_memcpy() {
; CHECK-LABEL: define void @volatile_memcpy() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 true)
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 true)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that the optimization isn't performed when the destination is captured.
define void @dest_captured() {
; CHECK-LABEL: define void @dest_captured() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_maycapture(ptr [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_maycapture(ptr %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that the optimization isn't performed when the source is captured.
define void @src_captured() {
; CHECK-LABEL: define void @src_captured() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_maycapture(ptr [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_maycapture(ptr %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that failure if any modref exists before the copy,
; Exactly ref seems safe because no mod say ref would be always undefined, but to make simple and conservative.
define void @mod_ref_before_copy() {
; CHECK-LABEL: define void @mod_ref_before_copy() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[R:%.*]] = call i32 @use_readonly(ptr nocapture [[DEST]])
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%r = call i32 @use_readonly(ptr nocapture %dest)
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that failure because copy semantics will change if dest is replaced with src.
define void @mod_dest_before_copy() {
; CHECK-LABEL: define void @mod_dest_before_copy() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: store i32 13, ptr [[DEST]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
store i32 13, ptr %dest
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
define void @mod_src_before_store_after_load() {
; CHECK-LABEL: define void @mod_src_before_store_after_load() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: store i32 13, ptr [[DEST]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 13, i32 13, i32 13 }, ptr [[SRC]], align 4
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
store i32 13, ptr %dest
%1 = call i32 @use_nocapture(ptr nocapture %src)
%src.val = load %struct.Foo, ptr %src
store %struct.Foo { i32 13, i32 13, i32 13 }, ptr %src
store %struct.Foo %src.val, ptr %dest
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that the optimization isn't performed,
; when the source may have mod and dest may have ref after the full copy.
define void @src_mod_dest_ref_after_copy() {
; CHECK-LABEL: define void @src_mod_dest_ref_after_copy() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 13, i32 13, i32 13 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
store %struct.Foo { i32 13, i32 13, i32 13 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that the optimization isn't performed.
; Merging dest to src is no longer valid if conflicting Mod/Ref exist.
define void @src_ref_dest_mod_after_copy() {
; CHECK-LABEL: define void @src_ref_dest_mod_after_copy() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 13, i32 13, i32 13 }, ptr [[DEST]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
store %struct.Foo { i32 13, i32 13, i32 13 }, ptr %dest
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that failure because alloca is modified through aliases, which requires recursive user ModRefChecks
define void @dest_alias_mod_before_copy() {
; CHECK-LABEL: define void @dest_alias_mod_before_copy() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[DEST_ALIAS:%.*]] = getelementptr inbounds [[STRUCT_FOO]], ptr [[DEST]], i64 0, i32 1
; CHECK-NEXT: store i32 13, ptr [[DEST_ALIAS]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%dest.alias = getelementptr inbounds %struct.Foo, ptr %dest, i64 0, i32 1
store i32 13, ptr %dest.alias
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that failure because alloca is modified through aliases, which requires recursive user ModRefChecks
define void @alias_src_ref_dest_mod_after_copy() {
; CHECK-LABEL: define void @alias_src_ref_dest_mod_after_copy() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[DEST_ALIAS:%.*]] = getelementptr inbounds [[STRUCT_FOO]], ptr [[DEST]], i64 0, i32 1
; CHECK-NEXT: store i32 13, ptr [[DEST_ALIAS]], align 4
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
%dest.alias = getelementptr inbounds %struct.Foo, ptr %dest, i64 0, i32 1
store i32 13, ptr %dest.alias
%2 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that the optimization isn't performed when the source and destination
; have mod ref conflict on bb2.
define void @multi_bb_dataflow_conflict(i1 %b) {
; CHECK-LABEL: define void @multi_bb_dataflow_conflict
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: br i1 [[B]], label [[BB0:%.*]], label [[BB1:%.*]]
; CHECK: bb0:
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: br label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: [[TMP3:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[DEST]])
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: [[TMP4:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr noundef nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
br i1 %b, label %bb0, label %bb1
bb0:
%2 = call i32 @use_nocapture(ptr noundef nocapture %src)
br label %bb2
bb1:
%3 = call i32 @use_nocapture(ptr noundef nocapture %dest)
br label %bb2
bb2:
%4 = call i32 @use_nocapture(ptr noundef nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Tests that failure because after copy mod could be before copy on loop.
define void @multi_bb_loop_dest_mod_before_copy(i32 %n) {
; CHECK-LABEL: define void @multi_bb_loop_dest_mod_before_copy
; CHECK-SAME: (i32 [[N:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[NLT1:%.*]] = icmp slt i32 [[N]], 1
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 8
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 8
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 0, i32 1, i32 42 }, ptr [[SRC]], align 4
; CHECK-NEXT: br i1 [[NLT1]], label [[LOOP_EXIT:%.*]], label [[LOOP_BODY:%.*]]
; CHECK: loop_body:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[NEW_I:%.*]], [[LOOP_BODY]] ], [ 1, [[ENTRY:%.*]] ]
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[DEST]], ptr align 8 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[NEW_I]] = add i32 [[I]], 1
; CHECK-NEXT: store i32 [[NEW_I]], ptr [[DEST]], align 4
; CHECK-NEXT: [[IGTN:%.*]] = icmp sgt i32 [[NEW_I]], [[N]]
; CHECK-NEXT: br i1 [[IGTN]], label [[LOOP_EXIT]], label [[LOOP_BODY]]
; CHECK: loop_exit:
; CHECK-NEXT: ret void
;
entry:
%nlt1 = icmp slt i32 %n, 1
%src = alloca %struct.Foo, align 8
%dest = alloca %struct.Foo, align 8
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %dest)
store %struct.Foo { i32 0, i32 1, i32 42 }, ptr %src
br i1 %nlt1, label %loop_exit, label %loop_body
loop_body:
%i = phi i32 [ %new_i, %loop_body ], [ 1, %entry ]
call void @llvm.memcpy.p0.p0.i64(ptr align 8 %dest, ptr align 8 %src, i64 12, i1 false)
%new_i = add i32 %i, 1
store i32 %new_i, ptr %dest
%igtn = icmp sgt i32 %new_i, %n
br i1 %igtn, label %loop_exit, label %loop_body
loop_exit:
ret void
}
; Tests that failure because partial-sized lifetimes are counted as mod.
define void @partial_lifetime() {
; CHECK-LABEL: define void @partial_lifetime() {
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO:%.*]], align 4
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO]], align 4
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 3, ptr nocapture [[DEST]])
; CHECK-NEXT: store [[STRUCT_FOO]] { i32 10, i32 20, i32 30 }, ptr [[SRC]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = call i32 @use_nocapture(ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 4 [[DEST]], ptr align 4 [[SRC]], i64 12, i1 false)
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 3, ptr nocapture [[SRC]])
; CHECK-NEXT: [[TMP2:%.*]] = call i32 @use_nocapture(ptr nocapture [[DEST]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[SRC]])
; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 12, ptr nocapture [[DEST]])
; CHECK-NEXT: ret void
;
%src = alloca %struct.Foo, align 4
%dest = alloca %struct.Foo, align 4
call void @llvm.lifetime.start.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.start.p0(i64 3, ptr nocapture %dest)
store %struct.Foo { i32 10, i32 20, i32 30 }, ptr %src
%1 = call i32 @use_nocapture(ptr nocapture %src)
call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dest, ptr align 4 %src, i64 12, i1 false)
call void @llvm.lifetime.end.p0(i64 3, ptr nocapture %src)
%2 = call i32 @use_nocapture(ptr nocapture %dest)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %src)
call void @llvm.lifetime.end.p0(i64 12, ptr nocapture %dest)
ret void
}
; Do not merge or crash if the different block user comes first.
define void @crash_store63851(i1 %b) {
; CHECK-LABEL: define void @crash_store63851
; CHECK-SAME: (i1 [[B:%.*]]) {
; CHECK-NEXT: [[DEST:%.*]] = alloca [[STRUCT_FOO:%.*]], align 8
; CHECK-NEXT: [[SRC:%.*]] = alloca [[STRUCT_FOO]], align 8
; CHECK-NEXT: store i32 0, ptr [[DEST]], align 4
; CHECK-NEXT: br i1 [[B]], label [[THEN:%.*]], label [[ELSE:%.*]]
; CHECK: then:
; CHECK-NEXT: [[T:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr [[DEST]], ptr [[SRC]], i64 12, i1 false)
; CHECK-NEXT: [[T3:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[SRC]])
; CHECK-NEXT: [[T4:%.*]] = call i32 @use_nocapture(ptr nocapture noundef [[DEST]])
; CHECK-NEXT: br label [[ELSE]]
; CHECK: else:
; CHECK-NEXT: ret void
;
%dest = alloca %struct.Foo, align 8
%src = alloca %struct.Foo, align 8
store i32 0, ptr %dest, align 4
br i1 %b, label %then, label %else
then: ; preds = %entry
%t = call i32 @use_nocapture(ptr nocapture noundef %src)
call void @llvm.memcpy.p0.p0.i64(ptr %dest, ptr %src, i64 12, i1 false)
%t3 = call i32 @use_nocapture(ptr nocapture noundef %src)
%t4 = call i32 @use_nocapture(ptr nocapture noundef %dest)
br label %else
else: ; preds = %then, %entry
ret void
uselistorder ptr %dest, { 1, 2, 0 }
}
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