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X86: Don't call malloc for 4 bits. No functionality change.

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llvm-svn: 149866
This commit is contained in:
Benjamin Kramer 2012-02-06 12:06:18 +00:00
parent 8f25434574
commit 3443a8294a
1 changed files with 3 additions and 4 deletions
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7
lib/Target/X86/X86ISelLowering.cpp
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@ -39,7 +39,6 @@
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringExtras.h"
@ -5412,7 +5411,7 @@ X86TargetLowering::LowerVECTOR_SHUFFLEv8i16(SDValue Op,
// mask values count as coming from any quadword, for better codegen.
unsigned LoQuad[] = { 0, 0, 0, 0 };
unsigned HiQuad[] = { 0, 0, 0, 0 };
BitVector InputQuads(4);
std::bitset<4> InputQuads;
for (unsigned i = 0; i < 8; ++i) {
unsigned *Quad = i < 4 ? LoQuad : HiQuad;
int EltIdx = SVOp->getMaskElt(i);
@ -5454,8 +5453,8 @@ X86TargetLowering::LowerVECTOR_SHUFFLEv8i16(SDValue Op,
bool V2Used = InputQuads[2] || InputQuads[3];
if (Subtarget->hasSSSE3()) {
if (InputQuads.count() == 2 && V1Used && V2Used) {
BestLoQuad = InputQuads.find_first();
BestHiQuad = InputQuads.find_next(BestLoQuad);
BestLoQuad = InputQuads[0] ? 0 : 1;
BestHiQuad = InputQuads[2] ? 2 : 3;
}
if (InputQuads.count() > 2) {
BestLoQuad = -1;