69 lines
2.1 KiB
LLVM
69 lines
2.1 KiB
LLVM
; RUN: opt -mergereturn -enable-new-pm=0 -S < %s | FileCheck %s
|
|
; RUN: opt -passes='break-crit-edges,lowerswitch,mergereturn' -S < %s | FileCheck %s
|
|
|
|
; The pass did previously not report the correct Modified status in the case
|
|
; where a function had at most one return block, and an unified unreachable
|
|
; block was created. This was caught by the pass return status check that is
|
|
; hidden under EXPENSIVE_CHECKS.
|
|
|
|
; CHECK: for.foo.body2:
|
|
; CHECK-NEXT: br label %UnifiedUnreachableBlock
|
|
|
|
; CHECK: for.foo.end:
|
|
; CHECK-NEXT: br label %UnifiedUnreachableBlock
|
|
|
|
; CHECK: UnifiedUnreachableBlock:
|
|
; CHECK-NEXT: unreachable
|
|
|
|
define i32 @foo() {
|
|
entry:
|
|
br label %for.foo.cond
|
|
|
|
for.foo.cond: ; preds = %entry
|
|
br i1 false, label %for.foo.body, label %for.foo.end3
|
|
|
|
for.foo.body: ; preds = %for.foo.cond
|
|
br label %for.foo.cond1
|
|
|
|
for.foo.cond1: ; preds = %for.foo.body
|
|
br i1 false, label %for.foo.body2, label %for.foo.end
|
|
|
|
for.foo.body2: ; preds = %for.foo.cond1
|
|
unreachable
|
|
|
|
for.foo.end: ; preds = %for.foo.cond1
|
|
unreachable
|
|
|
|
for.foo.end3: ; preds = %for.foo.cond
|
|
ret i32 undef
|
|
}
|
|
|
|
; CHECK: for.bar.body2:
|
|
; CHECK-NEXT: br label %UnifiedUnreachableBlock
|
|
|
|
; CHECK: for.bar.end:
|
|
; CHECK-NEXT: br label %UnifiedUnreachableBlock
|
|
|
|
; CHECK: UnifiedUnreachableBlock:
|
|
; CHECK-NEXT: unreachable
|
|
|
|
define void @bar() {
|
|
entry:
|
|
br label %for.bar.cond
|
|
|
|
for.bar.cond: ; preds = %entry
|
|
br i1 false, label %for.bar.body, label %for.bar.end
|
|
|
|
for.bar.body: ; preds = %for.bar.cond
|
|
br label %for.bar.cond1
|
|
|
|
for.bar.cond1: ; preds = %for.bar.body
|
|
br i1 false, label %for.bar.body2, label %for.bar.end
|
|
|
|
for.bar.body2: ; preds = %for.bar.cond1
|
|
unreachable
|
|
|
|
for.bar.end: ; preds = %for.bar.cond1
|
|
unreachable
|
|
}
|