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| author | Dan Gohman <gohman@apple.com> | 2008-05-01 19:13:24 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-05-01 19:13:24 +0000 |
| commit | e85b7585e92b825eb549196a6567ad5c1678518b (patch) | |
| tree | 93f56bb371b8eb0ddd8591862723a38b444644c1 /test | |
| parent | 4fd49e4a2f9f7b41f874b23bea15b204b0762cc2 (diff) | |
| download | llvm-e85b7585e92b825eb549196a6567ad5c1678518b.tar.gz llvm-e85b7585e92b825eb549196a6567ad5c1678518b.tar.bz2 llvm-e85b7585e92b825eb549196a6567ad5c1678518b.tar.xz | |
Fix an overaggressive SimplifyDemandedBits optimization on urem. This
fixes the 254.gap regression on x86 and the 403.gcc regression on x86-64.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50537 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/InstCombine/urem-simplify-bug.ll | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/urem-simplify-bug.ll b/test/Transforms/InstCombine/urem-simplify-bug.ll new file mode 100644 index 0000000000..15956f26b6 --- /dev/null +++ b/test/Transforms/InstCombine/urem-simplify-bug.ll @@ -0,0 +1,32 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {= or i32 %x, -5 } + +@.str = internal constant [5 x i8] c"foo\0A\00" ; <[5 x i8]*> [#uses=1] +@.str1 = internal constant [5 x i8] c"bar\0A\00" ; <[5 x i8]*> [#uses=1] + +define i32 @main() nounwind { +entry: + %x = call i32 @func_11( ) nounwind ; <i32> [#uses=1] + %tmp3 = or i32 %x, -5 ; <i32> [#uses=1] + %tmp5 = urem i32 251, %tmp3 ; <i32> [#uses=1] + %tmp6 = icmp ne i32 %tmp5, 0 ; <i1> [#uses=1] + %tmp67 = zext i1 %tmp6 to i32 ; <i32> [#uses=1] + %tmp9 = urem i32 %tmp67, 95 ; <i32> [#uses=1] + %tmp10 = and i32 %tmp9, 1 ; <i32> [#uses=1] + %tmp12 = icmp eq i32 %tmp10, 0 ; <i1> [#uses=1] + br i1 %tmp12, label %bb14, label %bb + +bb: ; preds = %entry + br label %bb15 + +bb14: ; preds = %entry + br label %bb15 + +bb15: ; preds = %bb14, %bb + %iftmp.0.0 = phi i8* [ getelementptr ([5 x i8]* @.str1, i32 0, i32 0), %bb14 ], [ getelementptr ([5 x i8]* @.str, i32 0, i32 0), %bb ] ; <i8*> [#uses=1] + %tmp17 = call i32 (i8*, ...)* @printf( i8* %iftmp.0.0 ) nounwind ; <i32> [#uses=0] + ret i32 0 +} + +declare i32 @func_11() + +declare i32 @printf(i8*, ...) nounwind |