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llvm/llvm/test/Transforms/LICM/gep-reassociate.ll 

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt -S -passes=licm < %s | FileCheck %s --check-prefixes=CHECK,SPEC
; RUN: opt -S -passes='licm<no-allowspeculation>' < %s | FileCheck %s --check-prefixes=CHECK,NOSPEC

declare void @use(ptr)
declare i32 @get.i32()
declare i64 @get.i64()
declare ptr @get.ptr()

define void @only_one_inbounds(ptr %ptr, i1 %c, i32 %arg) {
; CHECK-LABEL: define void @only_one_inbounds
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]], i32 [[ARG:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ARG_EXT:%.*]] = zext i32 [[ARG]] to i64
; CHECK-NEXT:    [[INVARIANT_GEP:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[ARG_EXT]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL:%.*]] = call i32 @get.i32()
; CHECK-NEXT:    [[VAL_EXT:%.*]] = zext i32 [[VAL]] to i64
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr [[INVARIANT_GEP]], i64 [[VAL_EXT]]
; CHECK-NEXT:    call void @use(ptr [[GEP]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  %arg.ext = zext i32 %arg to i64
  br label %loop

loop:
  %val = call i32 @get.i32()
  %val.ext = zext i32 %val to i64
  %ptr2 = getelementptr inbounds i8, ptr %ptr, i64 %val.ext
  %ptr3 = getelementptr i8, ptr %ptr2, i64 %arg.ext
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @both_inbounds_one_neg(ptr %ptr, i1 %c) {
; CHECK-LABEL: define void @both_inbounds_one_neg
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[INVARIANT_GEP:%.*]] = getelementptr i8, ptr [[PTR]], i64 -1
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL:%.*]] = call i32 @get.i32()
; CHECK-NEXT:    [[VAL_EXT:%.*]] = zext i32 [[VAL]] to i64
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr [[INVARIANT_GEP]], i64 [[VAL_EXT]]
; CHECK-NEXT:    call void @use(ptr [[GEP]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %val = call i32 @get.i32()
  %val.ext = zext i32 %val to i64
  %ptr2 = getelementptr inbounds i8, ptr %ptr, i64 %val.ext
  %ptr3 = getelementptr i8, ptr %ptr2, i64 -1
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @both_inbounds_pos(ptr %ptr, i1 %c) {
; CHECK-LABEL: define void @both_inbounds_pos
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[INVARIANT_GEP:%.*]] = getelementptr inbounds i8, ptr [[PTR]], i64 1
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL:%.*]] = call i32 @get.i32()
; CHECK-NEXT:    [[VAL_EXT:%.*]] = zext i32 [[VAL]] to i64
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i8, ptr [[INVARIANT_GEP]], i64 [[VAL_EXT]]
; CHECK-NEXT:    call void @use(ptr [[GEP]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %val = call i32 @get.i32()
  %val.ext = zext i32 %val to i64
  %ptr2 = getelementptr inbounds i8, ptr %ptr, i64 %val.ext
  %ptr3 = getelementptr inbounds i8, ptr %ptr2, i64 1
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @different_elem_types(ptr %ptr, i1 %c, i64 %arg) {
; CHECK-LABEL: define void @different_elem_types
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]], i64 [[ARG:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[INVARIANT_GEP:%.*]] = getelementptr i64, ptr [[PTR]], i64 [[ARG]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i32, ptr [[INVARIANT_GEP]], i64 [[VAL]]
; CHECK-NEXT:    call void @use(ptr [[GEP]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %val = call i64 @get.i64()
  %ptr2 = getelementptr i32, ptr %ptr, i64 %val
  %ptr3 = getelementptr i64, ptr %ptr2, i64 %arg
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @different_index_types(ptr %ptr, i1 %c, i32 %arg) {
; CHECK-LABEL: define void @different_index_types
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]], i32 [[ARG:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[INVARIANT_GEP:%.*]] = getelementptr i8, ptr [[PTR]], i32 [[ARG]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr [[INVARIANT_GEP]], i64 [[VAL]]
; CHECK-NEXT:    call void @use(ptr [[GEP]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %val = call i64 @get.i64()
  %ptr2 = getelementptr i8, ptr %ptr, i64 %val
  %ptr3 = getelementptr i8, ptr %ptr2, i32 %arg
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @different_index_count(ptr %ptr, i1 %c, i64 %arg1, i64 %arg2) {
; CHECK-LABEL: define void @different_index_count
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]], i64 [[ARG1:%.*]], i64 [[ARG2:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[INVARIANT_GEP:%.*]] = getelementptr [0 x i8], ptr [[PTR]], i64 [[ARG1]], i64 [[ARG2]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i8, ptr [[INVARIANT_GEP]], i64 [[VAL]]
; CHECK-NEXT:    call void @use(ptr [[GEP]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %val = call i64 @get.i64()
  %ptr2 = getelementptr i8, ptr %ptr, i64 %val
  %ptr3 = getelementptr [0 x i8], ptr %ptr2, i64 %arg1, i64 %arg2
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @src_has_extra_use(ptr %ptr, i1 %c, i64 %arg) {
; CHECK-LABEL: define void @src_has_extra_use
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]], i64 [[ARG:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[PTR2:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[VAL]]
; CHECK-NEXT:    call void @use(ptr [[PTR2]])
; CHECK-NEXT:    [[PTR3:%.*]] = getelementptr i8, ptr [[PTR2]], i64 [[ARG]]
; CHECK-NEXT:    call void @use(ptr [[PTR3]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %val = call i64 @get.i64()
  %ptr2 = getelementptr i8, ptr %ptr, i64 %val
  call void @use(ptr %ptr2)
  %ptr3 = getelementptr i8, ptr %ptr2, i64 %arg
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @src_already_invariant(ptr %ptr, i1 %c, i64 %arg1, i64 %arg2) {
; CHECK-LABEL: define void @src_already_invariant
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]], i64 [[ARG1:%.*]], i64 [[ARG2:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[PTR2:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[ARG1]]
; CHECK-NEXT:    [[PTR3:%.*]] = getelementptr i8, ptr [[PTR2]], i64 [[ARG2]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    call void @use(ptr [[PTR3]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %ptr2 = getelementptr i8, ptr %ptr, i64 %arg1
  %ptr3 = getelementptr i8, ptr %ptr2, i64 %arg2
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @gep_idx_not_invariant(ptr %ptr, i1 %c) {
; CHECK-LABEL: define void @gep_idx_not_invariant
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL1:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[VAL2:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[PTR2:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[VAL1]]
; CHECK-NEXT:    [[PTR3:%.*]] = getelementptr i8, ptr [[PTR2]], i64 [[VAL2]]
; CHECK-NEXT:    call void @use(ptr [[PTR3]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %val1 = call i64 @get.i64()
  %val2 = call i64 @get.i64()
  %ptr2 = getelementptr i8, ptr %ptr, i64 %val1
  %ptr3 = getelementptr i8, ptr %ptr2, i64 %val2
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @src_ptr_not_invariant(i1 %c, i64 %arg) {
; CHECK-LABEL: define void @src_ptr_not_invariant
; CHECK-SAME: (i1 [[C:%.*]], i64 [[ARG:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[PTR:%.*]] = call ptr @get.ptr()
; CHECK-NEXT:    [[PTR2:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[ARG]]
; CHECK-NEXT:    [[PTR3:%.*]] = getelementptr i8, ptr [[PTR2]], i64 [[VAL]]
; CHECK-NEXT:    call void @use(ptr [[PTR3]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %val = call i64 @get.i64()
  %ptr = call ptr @get.ptr()
  %ptr2 = getelementptr i8, ptr %ptr, i64 %arg
  %ptr3 = getelementptr i8, ptr %ptr2, i64 %val
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @multiple_indices(ptr %ptr, i1 %c, i64 %arg1, i64 %arg2) {
; CHECK-LABEL: define void @multiple_indices
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]], i64 [[ARG1:%.*]], i64 [[ARG2:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[INVARIANT_GEP:%.*]] = getelementptr [0 x i8], ptr [[PTR]], i64 [[ARG1]], i64 [[ARG2]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL1:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[VAL2:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr [0 x i8], ptr [[INVARIANT_GEP]], i64 [[VAL1]], i64 [[VAL2]]
; CHECK-NEXT:    call void @use(ptr [[GEP]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %val1 = call i64 @get.i64()
  %val2 = call i64 @get.i64()
  %ptr2 = getelementptr [0 x i8], ptr %ptr, i64 %val1, i64 %val2
  %ptr3 = getelementptr [0 x i8], ptr %ptr2, i64 %arg1, i64 %arg2
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @multiple_indices_not_invariant(ptr %ptr, i1 %c, i64 %arg1) {
; CHECK-LABEL: define void @multiple_indices_not_invariant
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]], i64 [[ARG1:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL1:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[VAL2:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[VAL3:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[PTR2:%.*]] = getelementptr [0 x i8], ptr [[PTR]], i64 [[VAL1]], i64 [[VAL2]]
; CHECK-NEXT:    [[PTR3:%.*]] = getelementptr [0 x i8], ptr [[PTR2]], i64 [[ARG1]], i64 [[VAL3]]
; CHECK-NEXT:    call void @use(ptr [[PTR3]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %val1 = call i64 @get.i64()
  %val2 = call i64 @get.i64()
  %val3 = call i64 @get.i64()
  %ptr2 = getelementptr [0 x i8], ptr %ptr, i64 %val1, i64 %val2
  %ptr3 = getelementptr [0 x i8], ptr %ptr2, i64 %arg1, i64 %val3
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @multiple_indices_very_invariant(ptr %ptr, i1 %c, i64 %arg1, i64 %arg2, i64 %arg3) {
; CHECK-LABEL: define void @multiple_indices_very_invariant
; CHECK-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]], i64 [[ARG1:%.*]], i64 [[ARG2:%.*]], i64 [[ARG3:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[INVARIANT_GEP:%.*]] = getelementptr [0 x i8], ptr [[PTR]], i64 [[ARG1]], i64 [[ARG2]]
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[VAL1:%.*]] = call i64 @get.i64()
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr [0 x i8], ptr [[INVARIANT_GEP]], i64 [[ARG3]], i64 [[VAL1]]
; CHECK-NEXT:    call void @use(ptr [[GEP]])
; CHECK-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %val1 = call i64 @get.i64()
  %ptr2 = getelementptr [0 x i8], ptr %ptr, i64 %arg3, i64 %val1
  %ptr3 = getelementptr [0 x i8], ptr %ptr2, i64 %arg1, i64 %arg2
  call void @use(ptr %ptr3)
  br i1 %c, label %loop, label %exit

exit:
  ret void
}

define void @src_already_invariant_speculation(ptr %ptr, i1 %c, i1 %c2, i64 %arg1, i64 %arg2) {
; SPEC-LABEL: define void @src_already_invariant_speculation
; SPEC-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]], i1 [[C2:%.*]], i64 [[ARG1:%.*]], i64 [[ARG2:%.*]]) {
; SPEC-NEXT:  entry:
; SPEC-NEXT:    [[PTR2:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[ARG1]]
; SPEC-NEXT:    [[PTR3:%.*]] = getelementptr i8, ptr [[PTR2]], i64 [[ARG2]]
; SPEC-NEXT:    br label [[LOOP:%.*]]
; SPEC:       loop:
; SPEC-NEXT:    br i1 [[C2]], label [[IF:%.*]], label [[LATCH:%.*]]
; SPEC:       if:
; SPEC-NEXT:    call void @use(ptr [[PTR3]])
; SPEC-NEXT:    br label [[LATCH]]
; SPEC:       latch:
; SPEC-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; SPEC:       exit:
; SPEC-NEXT:    ret void
;
; NOSPEC-LABEL: define void @src_already_invariant_speculation
; NOSPEC-SAME: (ptr [[PTR:%.*]], i1 [[C:%.*]], i1 [[C2:%.*]], i64 [[ARG1:%.*]], i64 [[ARG2:%.*]]) {
; NOSPEC-NEXT:  entry:
; NOSPEC-NEXT:    br label [[LOOP:%.*]]
; NOSPEC:       loop:
; NOSPEC-NEXT:    br i1 [[C2]], label [[IF:%.*]], label [[LATCH:%.*]]
; NOSPEC:       if:
; NOSPEC-NEXT:    [[PTR2:%.*]] = getelementptr i8, ptr [[PTR]], i64 [[ARG1]]
; NOSPEC-NEXT:    [[PTR3:%.*]] = getelementptr i8, ptr [[PTR2]], i64 [[ARG2]]
; NOSPEC-NEXT:    call void @use(ptr [[PTR3]])
; NOSPEC-NEXT:    br label [[LATCH]]
; NOSPEC:       latch:
; NOSPEC-NEXT:    br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; NOSPEC:       exit:
; NOSPEC-NEXT:    ret void
;
entry:
  br label %loop

loop:
  br i1 %c2, label %if, label %latch

if:
  %ptr2 = getelementptr i8, ptr %ptr, i64 %arg1
  %ptr3 = getelementptr i8, ptr %ptr2, i64 %arg2
  call void @use(ptr %ptr3)
  br label %latch

latch:
  br i1 %c, label %loop, label %exit

exit:
  ret void
}