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| author | Dan Gohman <gohman@apple.com> | 2008-03-11 21:29:43 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-03-11 21:29:43 +0000 |
| commit | 9736028d84de3a72dd8db5f49cfaa07280154a0e (patch) | |
| tree | ab1d29c427b19d25a51eedc3f5ed09c0df602477 | |
| parent | ef5d194aaa7d09937759447bceca0ff80bee1261 (diff) | |
| download | external_llvm-9736028d84de3a72dd8db5f49cfaa07280154a0e.zip external_llvm-9736028d84de3a72dd8db5f49cfaa07280154a0e.tar.gz external_llvm-9736028d84de3a72dd8db5f49cfaa07280154a0e.tar.bz2 | |
Use the correct value for InSignBit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48245 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/SelectionDAG/TargetLowering.cpp | 2 | ||||
| -rw-r--r-- | test/CodeGen/X86/sext-select.ll | 23 |
2 files changed, 24 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp index 90887a0..805ef47 100644 --- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -892,7 +892,7 @@ bool TargetLowering::SimplifyDemandedBits(SDOperand Op, MVT::ValueType InVT = Op.getOperand(0).getValueType(); unsigned InBits = MVT::getSizeInBits(InVT); APInt InMask = APInt::getLowBitsSet(BitWidth, InBits); - APInt InSignBit = APInt::getLowBitsSet(BitWidth, InBits); + APInt InSignBit = APInt::getBitsSet(BitWidth, InBits - 1, InBits); APInt NewBits = ~InMask & NewMask; // If none of the top bits are demanded, convert this into an any_extend. diff --git a/test/CodeGen/X86/sext-select.ll b/test/CodeGen/X86/sext-select.ll new file mode 100644 index 0000000..839ebc2 --- /dev/null +++ b/test/CodeGen/X86/sext-select.ll @@ -0,0 +1,23 @@ +; RUN: llvm-as < %s | llc -march=x86 | grep movsw +; PR2139 + +declare void @abort() + +define i32 @main() { +entry: + %tmp73 = tail call i1 @return_false() ; <i8> [#uses=1] + %g.0 = select i1 %tmp73, i16 0, i16 -480 ; <i16> [#uses=2] + %tmp7778 = sext i16 %g.0 to i32 ; <i32> [#uses=1] + %tmp80 = shl i32 %tmp7778, 3 ; <i32> [#uses=2] + %tmp87 = icmp sgt i32 %tmp80, 32767 ; <i1> [#uses=1] + br i1 %tmp87, label %bb90, label %bb91 +bb90: ; preds = %bb84, %bb72 + tail call void @abort() + unreachable +bb91: ; preds = %bb84 + ret i32 0 +} + +define i1 @return_false() { + ret i1 0 +} |