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| author | Chris Lattner <sabre@nondot.org> | 2011-05-22 07:03:34 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-05-22 07:03:34 +0000 |
| commit | 9e7bc05ad7fb69a25aff37e348942b07eed9cd73 (patch) | |
| tree | 7c0dc3ada0e8f21d05cf8d95991ffd787b9fc96c /test/Transforms/GVN | |
| parent | 0e959394ad5b74970253d21069ae11f25290e1fc (diff) | |
| download | llvm-9e7bc05ad7fb69a25aff37e348942b07eed9cd73.tar.gz llvm-9e7bc05ad7fb69a25aff37e348942b07eed9cd73.tar.bz2 llvm-9e7bc05ad7fb69a25aff37e348942b07eed9cd73.tar.xz | |
fix PR9841 by having GVN not process dead loads. This was
causing it to get into infinite loops when it would widen a
load (which can necessarily leave around dead loads).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131847 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/GVN')
| -rw-r--r-- | test/Transforms/GVN/crash.ll | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/test/Transforms/GVN/crash.ll b/test/Transforms/GVN/crash.ll index 4a3aa1c55a..31eae256c6 100644 --- a/test/Transforms/GVN/crash.ll +++ b/test/Transforms/GVN/crash.ll @@ -151,3 +151,15 @@ dead: dead2: ret i32 %A } + + +; PR9841 +define fastcc i8 @test5(i8* %P) nounwind { +entry: + %0 = load i8* %P, align 2 + + %Q = getelementptr i8* %P, i32 1 + %1 = load i8* %Q, align 1 + ret i8 %1 +} + |