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| author | Chris Lattner <sabre@nondot.org> | 2011-01-04 18:19:15 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-01-04 18:19:15 +0000 |
| commit | 43b40a4620c155c73ac71b48472ea2411d7c35da (patch) | |
| tree | 2a91e31af838065b7c2a32dd1ad73b215b810faa /test/Transforms/InstCombine/crash.ll | |
| parent | ba64b9706a1f83e8388c3c722953de16d102de27 (diff) | |
fix an off-by-one bug that caused a crash analyzing
ashr's with huge shift amounts, PR8896
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122814 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/crash.ll')
| -rw-r--r-- | test/Transforms/InstCombine/crash.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/crash.ll b/test/Transforms/InstCombine/crash.ll index deb7277c5e..60cb747787 100644 --- a/test/Transforms/InstCombine/crash.ll +++ b/test/Transforms/InstCombine/crash.ll @@ -298,3 +298,40 @@ entry: } +; PR8896 +@g_54 = external global [7 x i16] + +define void @test15(i32* %p_92) nounwind { +entry: +%0 = load i32* %p_92, align 4 +%1 = icmp ne i32 %0, 0 +%2 = zext i1 %1 to i32 +%3 = call i32 @func_14() nounwind +%4 = trunc i32 %3 to i16 +%5 = sext i16 %4 to i32 +%6 = trunc i32 %5 to i16 +br i1 undef, label %"3", label %"5" + +"3": ; preds = %entry +%7 = sext i16 %6 to i32 +%8 = ashr i32 %7, -1649554541 +%9 = trunc i32 %8 to i16 +br label %"5" + +"5": ; preds = %"3", %entry +%10 = phi i16 [ %9, %"3" ], [ %6, %entry ] +%11 = sext i16 %10 to i32 +%12 = xor i32 %2, %11 +%13 = sext i32 %12 to i64 +%14 = icmp ne i64 %13, 0 +br i1 %14, label %return, label %"7" + +"7": ; preds = %"5" +ret void + +return: ; preds = %"5" +ret void +} + +declare i32 @func_14() + |