diff options
| author | Dan Gohman <gohman@apple.com> | 2009-04-25 17:05:40 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-04-25 17:05:40 +0000 |
| commit | 2c73d5fb9e3d68c96bb2242bbbf2930a8db10343 (patch) | |
| tree | 7871a90ca0cb7812f7fe9a280dc3c92ea1adc2a5 /test/Transforms/IndVarSimplify/avoid-i0.ll | |
| parent | 4cdc44c82c4415b467760065fed146f73933c67b (diff) | |
| download | external_llvm-2c73d5fb9e3d68c96bb2242bbbf2930a8db10343.zip external_llvm-2c73d5fb9e3d68c96bb2242bbbf2930a8db10343.tar.gz external_llvm-2c73d5fb9e3d68c96bb2242bbbf2930a8db10343.tar.bz2 | |
Handle ands with 0 and shifts by 0 correctly. These aren't
common, but indvars shouldn't crash on them. This fixes PR4054.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70051 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/IndVarSimplify/avoid-i0.ll')
| -rw-r--r-- | test/Transforms/IndVarSimplify/avoid-i0.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/Transforms/IndVarSimplify/avoid-i0.ll b/test/Transforms/IndVarSimplify/avoid-i0.ll new file mode 100644 index 0000000..28112e7 --- /dev/null +++ b/test/Transforms/IndVarSimplify/avoid-i0.ll @@ -0,0 +1,23 @@ +; RUN: llvm-as < %s | opt -indvars +; PR4054 + +; Don't treat an and with 0 as a mask (trunc+zext). + +define i32 @int80(i8 signext %p_71) nounwind { +entry: + br label %bb + +bb: ; preds = %bb6, %entry + %p_71_addr.0 = phi i8 [ %p_71, %entry ], [ %0, %bb6 ] ; <i8> [#uses=0] + br i1 false, label %bb4, label %bb1 + +bb1: ; preds = %bb + ret i32 0 + +bb4: ; preds = %bb4, %bb + br i1 false, label %bb6, label %bb4 + +bb6: ; preds = %bb4 + %0 = and i8 0, 0 ; <i8> [#uses=1] + br label %bb +} |