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author | Meador Inge <meadori@codesourcery.com> | 2012-11-26 00:24:07 +0000 |
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committer | Meador Inge <meadori@codesourcery.com> | 2012-11-26 00:24:07 +0000 |
commit | dfb3b1a779c62c1ee41f9cddcaad0b89278052ae (patch) | |
tree | 809db6e0fb93be4b0f656268dd396aa9ef419334 /lib/Transforms/Scalar | |
parent | 15d099a790f3fd6f8f643c4e7c50a1659f4fc92b (diff) | |
download | llvm-dfb3b1a779c62c1ee41f9cddcaad0b89278052ae.tar.gz llvm-dfb3b1a779c62c1ee41f9cddcaad0b89278052ae.tar.bz2 llvm-dfb3b1a779c62c1ee41f9cddcaad0b89278052ae.tar.xz |
instcombine: Migrate *abs optimizations
This patch migrates the *abs optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168574 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar')
-rw-r--r-- | lib/Transforms/Scalar/SimplifyLibCalls.cpp | 26 |
1 files changed, 1 insertions, 25 deletions
diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp index fbfb7b42c9..fecc389307 100644 --- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp +++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp @@ -137,27 +137,6 @@ struct IsAsciiOpt : public LibCallOptimization { }; //===---------------------------------------===// -// 'abs', 'labs', 'llabs' Optimizations - -struct AbsOpt : public LibCallOptimization { - virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { - FunctionType *FT = Callee->getFunctionType(); - // We require integer(integer) where the types agree. - if (FT->getNumParams() != 1 || !FT->getReturnType()->isIntegerTy() || - FT->getParamType(0) != FT->getReturnType()) - return 0; - - // abs(x) -> x >s -1 ? x : -x - Value *Op = CI->getArgOperand(0); - Value *Pos = B.CreateICmpSGT(Op, Constant::getAllOnesValue(Op->getType()), - "ispos"); - Value *Neg = B.CreateNeg(Op, "neg"); - return B.CreateSelect(Pos, Op, Neg); - } -}; - - -//===---------------------------------------===// // 'toascii' Optimizations struct ToAsciiOpt : public LibCallOptimization { @@ -542,7 +521,7 @@ namespace { StringMap<LibCallOptimization*> Optimizations; // Integer Optimizations - AbsOpt Abs; IsDigitOpt IsDigit; IsAsciiOpt IsAscii; + IsDigitOpt IsDigit; IsAsciiOpt IsAscii; ToAsciiOpt ToAscii; // Formatting and IO Optimizations SPrintFOpt SPrintF; PrintFOpt PrintF; @@ -603,9 +582,6 @@ void SimplifyLibCalls::AddOpt(LibFunc::Func F1, LibFunc::Func F2, /// we know. void SimplifyLibCalls::InitOptimizations() { // Integer Optimizations - Optimizations["abs"] = &Abs; - Optimizations["labs"] = &Abs; - Optimizations["llabs"] = &Abs; Optimizations["isdigit"] = &IsDigit; Optimizations["isascii"] = &IsAscii; Optimizations["toascii"] = &ToAscii; |