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| author | Chris Lattner <sabre@nondot.org> | 2008-03-02 05:41:07 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-03-02 05:41:07 +0000 |
| commit | f858a04ae9d72c4d2bc31166b80439e83d2eb76b (patch) | |
| tree | 0f8aff32ddd7ba0026e4cec12324df6d95a92872 /lib | |
| parent | 9bbc1f53106287ffbfe37b2d5376098b97a1b0e1 (diff) | |
| download | external_llvm-f858a04ae9d72c4d2bc31166b80439e83d2eb76b.zip external_llvm-f858a04ae9d72c4d2bc31166b80439e83d2eb76b.tar.gz external_llvm-f858a04ae9d72c4d2bc31166b80439e83d2eb76b.tar.bz2 | |
implement shufflevector.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47815 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/CBackend/CBackend.cpp | 42 |
1 files changed, 38 insertions, 4 deletions
diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp index 5e98798..c13cdf5 100644 --- a/lib/Target/CBackend/CBackend.cpp +++ b/lib/Target/CBackend/CBackend.cpp @@ -191,10 +191,13 @@ namespace { // Don't inline a load across a store or other bad things! return false; - // Must not be used in inline asm or extractelement. - if (I.hasOneUse() && - (isInlineAsm(*I.use_back()) || isa<ExtractElementInst>(I))) - return false; + // Must not be used in inline asm, extractelement, or shufflevector. + if (I.hasOneUse()) { + const Instruction &User = cast<Instruction>(*I.use_back()); + if (isInlineAsm(User) || isa<ExtractElementInst>(User) || + isa<ShuffleVectorInst>(User)) + return false; + } // Only inline instruction it if it's use is in the same BB as the inst. return I.getParent() == cast<Instruction>(I.use_back())->getParent(); @@ -256,6 +259,7 @@ namespace { void visitInsertElementInst(InsertElementInst &I); void visitExtractElementInst(ExtractElementInst &I); + void visitShuffleVectorInst(ShuffleVectorInst &SVI); void visitInstruction(Instruction &I) { cerr << "C Writer does not know about " << I; @@ -3051,6 +3055,36 @@ void CWriter::visitExtractElementInst(ExtractElementInst &I) { Out << "]"; } +void CWriter::visitShuffleVectorInst(ShuffleVectorInst &SVI) { + Out << "("; + printType(Out, SVI.getType()); + Out << "){ "; + const VectorType *VT = SVI.getType(); + unsigned NumElts = VT->getNumElements(); + const Type *EltTy = VT->getElementType(); + + for (unsigned i = 0; i != NumElts; ++i) { + if (i) Out << ", "; + int SrcVal = SVI.getMaskValue(i); + if ((unsigned)SrcVal >= NumElts*2) { + Out << " 0/*undef*/ "; + } else { + Value *Op = SVI.getOperand((unsigned)SrcVal >= NumElts); + if (isa<Instruction>(Op)) { + // Do an extractelement of this value from the appropriate input. + Out << "(("; + printType(Out, PointerType::getUnqual(EltTy)); + Out << ")(&" << GetValueName(Op) + << "))[" << (SrcVal & NumElts-1) << "]"; + } else if (isa<ConstantAggregateZero>(Op) || isa<UndefValue>(Op)) { + Out << "0"; + } else { + printConstant(cast<ConstantVector>(Op)->getOperand(SrcVal & NumElts-1)); + } + } + } + Out << "}"; +} //===----------------------------------------------------------------------===// |