diff options
| author | Chris Lattner <sabre@nondot.org> | 2011-02-06 21:44:57 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2011-02-06 21:44:57 +0000 |
| commit | 35bda8914c0d1c02a6f90f42e7810c83150737e1 (patch) | |
| tree | b210ccd009a7ac5331c76c6393b5b45d141d12d0 /lib/Bitcode/Reader/BitcodeReader.cpp | |
| parent | bd75021465e7f8c81785e692cfd3ce559764e46f (diff) | |
enhance vmcore to know that udiv's can be exact, and add a trivial
instcombine xform to exercise this.
Nothing forms exact udivs yet though. This is progress on PR8862
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124992 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Bitcode/Reader/BitcodeReader.cpp')
| -rw-r--r-- | lib/Bitcode/Reader/BitcodeReader.cpp | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/Bitcode/Reader/BitcodeReader.cpp b/lib/Bitcode/Reader/BitcodeReader.cpp index adcad74989..a744d83302 100644 --- a/lib/Bitcode/Reader/BitcodeReader.cpp +++ b/lib/Bitcode/Reader/BitcodeReader.cpp @@ -1090,8 +1090,9 @@ bool BitcodeReader::ParseConstants() { Flags |= OverflowingBinaryOperator::NoSignedWrap; if (Record[3] & (1 << bitc::OBO_NO_UNSIGNED_WRAP)) Flags |= OverflowingBinaryOperator::NoUnsignedWrap; - } else if (Opc == Instruction::SDiv) { - if (Record[3] & (1 << bitc::SDIV_EXACT)) + } else if (Opc == Instruction::SDiv || + Opc == Instruction::UDiv) { + if (Record[3] & (1 << bitc::PEO_EXACT)) Flags |= SDivOperator::IsExact; } } @@ -1905,8 +1906,9 @@ bool BitcodeReader::ParseFunctionBody(Function *F) { cast<BinaryOperator>(I)->setHasNoSignedWrap(true); if (Record[OpNum] & (1 << bitc::OBO_NO_UNSIGNED_WRAP)) cast<BinaryOperator>(I)->setHasNoUnsignedWrap(true); - } else if (Opc == Instruction::SDiv) { - if (Record[OpNum] & (1 << bitc::SDIV_EXACT)) + } else if (Opc == Instruction::SDiv || + Opc == Instruction::UDiv) { + if (Record[OpNum] & (1 << bitc::PEO_EXACT)) cast<BinaryOperator>(I)->setIsExact(true); } } |