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author | Meador Inge <meadori@codesourcery.com> | 2012-11-26 03:10:07 +0000 |
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committer | Meador Inge <meadori@codesourcery.com> | 2012-11-26 03:10:07 +0000 |
commit | 017bb750ab99b2ca54771fc86a6b2fed4ad90eec (patch) | |
tree | 9d2d0e7563f4df87ed93464587b56f09313c9726 /lib/Transforms/Utils/SimplifyLibCalls.cpp | |
parent | a0798ec3774de21f3ae3a7eba237e274e4c05ac3 (diff) | |
download | external_llvm-017bb750ab99b2ca54771fc86a6b2fed4ad90eec.zip external_llvm-017bb750ab99b2ca54771fc86a6b2fed4ad90eec.tar.gz external_llvm-017bb750ab99b2ca54771fc86a6b2fed4ad90eec.tar.bz2 |
instcombine: Migrate isascii optimizations
This patch migrates the isascii optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168579 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Utils/SimplifyLibCalls.cpp')
-rw-r--r-- | lib/Transforms/Utils/SimplifyLibCalls.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/Transforms/Utils/SimplifyLibCalls.cpp b/lib/Transforms/Utils/SimplifyLibCalls.cpp index 1320f70..2b390c1 100644 --- a/lib/Transforms/Utils/SimplifyLibCalls.cpp +++ b/lib/Transforms/Utils/SimplifyLibCalls.cpp @@ -1283,6 +1283,21 @@ struct IsDigitOpt : public LibCallOptimization { } }; +struct IsAsciiOpt : public LibCallOptimization { + virtual Value *callOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) { + FunctionType *FT = Callee->getFunctionType(); + // We require integer(i32) + if (FT->getNumParams() != 1 || !FT->getReturnType()->isIntegerTy() || + !FT->getParamType(0)->isIntegerTy(32)) + return 0; + + // isascii(c) -> c <u 128 + Value *Op = CI->getArgOperand(0); + Op = B.CreateICmpULT(Op, B.getInt32(128), "isascii"); + return B.CreateZExt(Op, CI->getType()); + } +}; + } // End anonymous namespace. namespace llvm { @@ -1333,6 +1348,7 @@ class LibCallSimplifierImpl { FFSOpt FFS; AbsOpt Abs; IsDigitOpt IsDigit; + IsAsciiOpt IsAscii; void initOptimizations(); void addOpt(LibFunc::Func F, LibCallOptimization* Opt); @@ -1452,6 +1468,7 @@ void LibCallSimplifierImpl::initOptimizations() { addOpt(LibFunc::labs, &Abs); addOpt(LibFunc::llabs, &Abs); addOpt(LibFunc::isdigit, &IsDigit); + addOpt(LibFunc::isascii, &IsAscii); } Value *LibCallSimplifierImpl::optimizeCall(CallInst *CI) { |