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author | Torok Edwin <edwintorok@gmail.com> | 2009-09-24 18:33:42 +0000 |
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committer | Torok Edwin <edwintorok@gmail.com> | 2009-09-24 18:33:42 +0000 |
commit | c3384995258efcec26acf3a88715dc99cd871c3e (patch) | |
tree | a1bfd4d5818635b817206fe5ee991673baab2901 /test/Transforms/IPConstantProp | |
parent | 96b930ddc7f0df9e278a5cb65ad77a559a20964e (diff) | |
download | external_llvm-c3384995258efcec26acf3a88715dc99cd871c3e.zip external_llvm-c3384995258efcec26acf3a88715dc99cd871c3e.tar.gz external_llvm-c3384995258efcec26acf3a88715dc99cd871c3e.tar.bz2 |
Constant propagating byval pointer is safe if function is readonly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82700 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/IPConstantProp')
-rw-r--r-- | test/Transforms/IPConstantProp/2009-09-24-byval-ptr.ll | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/test/Transforms/IPConstantProp/2009-09-24-byval-ptr.ll b/test/Transforms/IPConstantProp/2009-09-24-byval-ptr.ll index 75055d4..f4bab35 100644 --- a/test/Transforms/IPConstantProp/2009-09-24-byval-ptr.ll +++ b/test/Transforms/IPConstantProp/2009-09-24-byval-ptr.ll @@ -16,9 +16,25 @@ entry: return: ; preds = %entry ret void } -define void @unions() nounwind { + +define internal i32 @vfu2(%struct.MYstr* byval align 4 %u) nounwind readonly { +entry: + %0 = getelementptr %struct.MYstr* %u, i32 0, i32 1 ; <i32*> [#uses=1] + %1 = load i32* %0 +; CHECK: load i32* getelementptr inbounds (%struct.MYstr* @mystr, i32 0, i32 1) ; <i32> [#uses=1] + %2 = getelementptr %struct.MYstr* %u, i32 0, i32 0 ; <i8*> [#uses=1] + %3 = load i8* %2 +; CHECK: load i8* getelementptr inbounds (%struct.MYstr* @mystr, i32 0, i32 0) ; <i8> [#uses=1] + %4 = zext i8 %3 to i32 + %5 = add i32 %4, %1 + ret i32 %5 +} + +define i32 @unions() nounwind { entry: call void @vfu1(%struct.MYstr* byval align 4 @mystr) nounwind - ret void + %result = call i32 @vfu2(%struct.MYstr* byval align 4 @mystr) nounwind + + ret i32 %result } |