[llvm-commits] [llvm] r149866 - /llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

[Benjamin Kramer]

Author: d0k
Date: Mon Feb  6 06:06:18 2012
New Revision: 149866

URL: http://llvm.org/viewvc/llvm-project?rev=149866&view=rev
Log:
X86: Don't call malloc for 4 bits. No functionality change.

Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=149866&r1=149865&r2=149866&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Mon Feb  6 06:06:18 2012
@@ -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 @@
   // 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 @@
   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;