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| author | Evan Cheng <evan.cheng@apple.com> | 2009-12-15 00:41:36 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-12-15 00:41:36 +0000 |
| commit | 99b653c36f0141f6b9515d688960ac8c2cb857ff (patch) | |
| tree | bd6bd822b11a900dd8d14baed63cb4dea752bd4e /test/CodeGen/X86/zext-shl.ll | |
| parent | 0c479d3c6bd474e5135bddfed42f37e3092cac31 (diff) | |
| download | external_llvm-99b653c36f0141f6b9515d688960ac8c2cb857ff.zip external_llvm-99b653c36f0141f6b9515d688960ac8c2cb857ff.tar.gz external_llvm-99b653c36f0141f6b9515d688960ac8c2cb857ff.tar.bz2 | |
Propagate zest through logical shift.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91378 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/zext-shl.ll')
| -rw-r--r-- | test/CodeGen/X86/zext-shl.ll | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/test/CodeGen/X86/zext-shl.ll b/test/CodeGen/X86/zext-shl.ll new file mode 100644 index 0000000..bc3198a --- /dev/null +++ b/test/CodeGen/X86/zext-shl.ll @@ -0,0 +1,38 @@ +; RUN: llc < %s -march=x86 | FileCheck %s + +define i32 @t1(i8 zeroext %x) nounwind readnone ssp { +entry: +; CHECK: t1: +; CHECK: shll +; CHECK-NOT: movzwl +; CHECK: ret + %0 = zext i8 %x to i16 + %1 = shl i16 %0, 5 + %2 = zext i16 %1 to i32 + ret i32 %2 +} + +define i32 @t2(i8 zeroext %x) nounwind readnone ssp { +entry: +; CHECK: t2: +; CHECK: shrl +; CHECK-NOT: movzwl +; CHECK: ret + %0 = zext i8 %x to i16 + %1 = lshr i16 %0, 3 + %2 = zext i16 %1 to i32 + ret i32 %2 +} + +define i32 @t3(i8 zeroext %x, i8 zeroext %y) nounwind readnone ssp { +entry: +; CHECK: t3: +; CHECK: shll +; CHECK-NOT: movzwl +; CHECK: ret + %0 = zext i8 %x to i16 + %1 = zext i8 %y to i16 + %2 = shl i16 %0, %1 + %3 = zext i16 %2 to i32 + ret i32 %3 +} |