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author | Tom Stellard <thomas.stellard@amd.com> | 2013-10-21 20:07:30 +0000 |
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committer | Tom Stellard <thomas.stellard@amd.com> | 2013-10-21 20:07:30 +0000 |
commit | f2089e1dd810236f716c1a45fa1e561dce5074e8 (patch) | |
tree | 371a4c72e429c50d8cbb323d5b145b74cfe060f9 /test/Transforms/SimplifyCFG/attr-noduplicate.ll | |
parent | e161dc28a8a58431e5e1df98834aaee72baada85 (diff) | |
download | external_llvm-f2089e1dd810236f716c1a45fa1e561dce5074e8.zip external_llvm-f2089e1dd810236f716c1a45fa1e561dce5074e8.tar.gz external_llvm-f2089e1dd810236f716c1a45fa1e561dce5074e8.tar.bz2 |
SimplifyCFG: Don't duplicate calls to functions marked noduplicate v2
v2:
- Use CI->cannotDuplicate()
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193115 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/SimplifyCFG/attr-noduplicate.ll')
-rw-r--r-- | test/Transforms/SimplifyCFG/attr-noduplicate.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyCFG/attr-noduplicate.ll b/test/Transforms/SimplifyCFG/attr-noduplicate.ll new file mode 100644 index 0000000..523aa51 --- /dev/null +++ b/test/Transforms/SimplifyCFG/attr-noduplicate.ll @@ -0,0 +1,37 @@ +; RUN: opt < %s -simplifycfg -S | FileCheck %s + +; This test checks that the SimplifyCFG pass won't duplicate a call to a +; function marked noduplicate. +; +; CHECK-LABEL: @noduplicate +; CHECK: call void @barrier +; CHECK-NOT: call void @barrier +define void @noduplicate(i32 %cond, i32* %out) { +entry: + %out1 = getelementptr i32* %out, i32 1 + %out2 = getelementptr i32* %out, i32 2 + %cmp = icmp eq i32 %cond, 0 + br i1 %cmp, label %if.then, label %if.end + +if.then: + store i32 5, i32* %out + br label %if.end + +if.end: + call void @barrier() #0 + br i1 %cmp, label %cond.end, label %cond.false + +cond.false: + store i32 5, i32* %out1 + br label %cond.end + +cond.end: + %value = phi i32 [ 1, %cond.false ], [ 0, %if.end ] + store i32 %value, i32* %out2 + ret void +} + +; Function Attrs: noduplicate nounwind +declare void @barrier() #0 + +attributes #0 = { noduplicate nounwind } |