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continue making the world safe for ConstantDataVector. At this point,

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we should (theoretically optimize and codegen ConstantDataVector as well
as ConstantVector.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149116 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2012-01-27 03:08:05 +00:00
parent 2b343702aa
commit a78fa8cc2d
10 changed files with 107 additions and 74 deletions
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lib/Transforms/InstCombine/InstCombineCalls.cpp
+9 -6
View File
@@ -623,14 +623,16 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
case Intrinsic::ppc_altivec_vperm:
// Turn vperm(V1,V2,mask) -> shuffle(V1,V2,mask) if mask is a constant.
if (ConstantVector *Mask = dyn_cast<ConstantVector>(II->getArgOperand(2))) {
assert(Mask->getNumOperands() == 16 && "Bad type for intrinsic!");
if (Constant *Mask = dyn_cast<Constant>(II->getArgOperand(2))) {
assert(Mask->getType()->getVectorNumElements() == 16 &&
"Bad type for intrinsic!");
// Check that all of the elements are integer constants or undefs.
bool AllEltsOk = true;
for (unsigned i = 0; i != 16; ++i) {
if (!isa<ConstantInt>(Mask->getOperand(i)) &&
!isa<UndefValue>(Mask->getOperand(i))) {
Constant *Elt = Mask->getAggregateElement(i);
if (Elt == 0 ||
!(isa<ConstantInt>(Elt) || isa<UndefValue>(Elt))) {
AllEltsOk = false;
break;
}
@@ -649,9 +651,10 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
memset(ExtractedElts, 0, sizeof(ExtractedElts));
for (unsigned i = 0; i != 16; ++i) {
if (isa<UndefValue>(Mask->getOperand(i)))
if (isa<UndefValue>(Mask->getAggregateElement(i)))
continue;
unsigned Idx=cast<ConstantInt>(Mask->getOperand(i))->getZExtValue();
unsigned Idx =
cast<ConstantInt>(Mask->getAggregateElement(i))->getZExtValue();
Idx &= 31; // Match the hardware behavior.
if (ExtractedElts[Idx] == 0) {