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