; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=ipsccp < %s | FileCheck %s
declare void @BB0_f()
declare void @BB1_f()
; Make sure we can eliminate what is in BB0 as we know that the indirectbr is going to BB1.
;
define void @indbrtest1() {
; CHECK-LABEL: @indbrtest1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: BB1:
; CHECK-NEXT: call void @BB1_f()
; CHECK-NEXT: ret void
;
entry:
indirectbr ptr blockaddress(@indbrtest1, %BB1), [label %BB0, label %BB1]
BB0:
call void @BB0_f()
br label %BB1
BB1:
call void @BB1_f()
ret void
}
; Make sure we can eliminate what is in BB0 as we know that the indirectbr is going to BB1
; by looking through the casts. The casts should be folded away when they are visited
; before the indirectbr instruction.
;
define void @indbrtest2() {
; CHECK-LABEL: @indbrtest2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: BB1:
; CHECK-NEXT: call void @BB1_f()
; CHECK-NEXT: ret void
;
entry:
%a = ptrtoint ptr blockaddress(@indbrtest2, %BB1) to i64
%b = inttoptr i64 %a to ptr
indirectbr ptr %b, [label %BB0, label %BB1]
BB0:
call void @BB0_f()
br label %BB1
BB1:
call void @BB1_f()
ret void
}
; Make sure we can not eliminate BB0 as we do not know the target of the indirectbr.
define void @indbrtest3(ptr %Q) {
; CHECK-LABEL: @indbrtest3(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[T:%.*]] = load ptr, ptr [[Q:%.*]], align 8
; CHECK-NEXT: indirectbr ptr [[T]], [label [[BB0:%.*]], label %BB1]
; CHECK: BB0:
; CHECK-NEXT: call void @BB0_f()
; CHECK-NEXT: br label [[BB1:%.*]]
; CHECK: BB1:
; CHECK-NEXT: call void @BB1_f()
; CHECK-NEXT: ret void
;
entry:
%t = load ptr, ptr %Q
indirectbr ptr %t, [label %BB0, label %BB1]
BB0:
call void @BB0_f()
br label %BB1
BB1:
call void @BB1_f()
ret void
}
; Branch on undef is UB, so we can convert the indirectbr to unreachable.
define void @indbrtest4(ptr %Q) {
; CHECK-LABEL: @indbrtest4(
; CHECK-NEXT: entry:
; CHECK-NEXT: unreachable
;
entry:
indirectbr ptr undef, [label %BB0, label %BB1]
BB0:
call void @BB0_f()
ret void
BB1:
call void @BB1_f()
ret void
}
define internal i32 @indbrtest5(i1 %c) {
; CHECK-LABEL: @indbrtest5(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BRANCH_BLOCK:%.*]]
; CHECK: bb2:
; CHECK-NEXT: br label [[BRANCH_BLOCK]]
; CHECK: branch.block:
; CHECK-NEXT: [[ADDR:%.*]] = phi ptr [ blockaddress(@indbrtest5, [[TARGET1:%.*]]), [[BB1]] ], [ blockaddress(@indbrtest5, [[TARGET2:%.*]]), [[BB2]] ]
; CHECK-NEXT: indirectbr ptr [[ADDR]], [label [[TARGET1]], label %target2]
; CHECK: target1:
; CHECK-NEXT: br label [[TARGET2]]
; CHECK: target2:
; CHECK-NEXT: ret i32 poison
;
entry:
br i1 %c, label %bb1, label %bb2
bb1:
br label %branch.block
bb2:
br label %branch.block
branch.block:
%addr = phi ptr [blockaddress(@indbrtest5, %target1), %bb1], [blockaddress(@indbrtest5, %target2), %bb2]
indirectbr ptr %addr, [label %target1, label %target2]
target1:
br label %target2
target2:
ret i32 10
}
define i32 @indbrtest5_callee(i1 %c) {
; CHECK-LABEL: @indbrtest5_callee(
; CHECK-NEXT: [[R:%.*]] = call i32 @indbrtest5(i1 [[C:%.*]])
; CHECK-NEXT: ret i32 10
;
%r = call i32 @indbrtest5(i1 %c)
ret i32 %r
}
define i32 @indbr_duplicate_successors_phi(i1 %c, i32 %x) {
; CHECK-LABEL: @indbr_duplicate_successors_phi(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[INDBR:%.*]], label [[BB0:%.*]]
; CHECK: indbr:
; CHECK-NEXT: br label [[BB0]]
; CHECK: BB0:
; CHECK-NEXT: [[PHI:%.*]] = phi i32 [ [[X:%.*]], [[ENTRY:%.*]] ], [ 0, [[INDBR]] ]
; CHECK-NEXT: ret i32 [[PHI]]
;
entry:
br i1 %c, label %indbr, label %BB0
indbr:
indirectbr ptr blockaddress(@indbr_duplicate_successors_phi, %BB0), [label %BB0, label %BB0, label %BB1]
BB0:
%phi = phi i32 [ %x, %entry ], [ 0, %indbr ], [ 0, %indbr ]
ret i32 %phi
BB1:
ret i32 0
}
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