Changes in directory llvm/lib/Transforms/Scalar:
InstructionCombining.cpp updated: 1.676 -> 1.677
---
Log message:
Make the "KnownZero ^ TypeMask" computation just once.
---
Diffs of the changes: (+4 -3)
InstructionCombining.cpp | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)
Index: llvm/lib/Transforms/Scalar/InstructionCombining.cpp
diff -u llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.676
llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.677
--- llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.676 Thu Mar 22
21:39:25 2007
+++ llvm/lib/Transforms/Scalar/InstructionCombining.cpp Thu Mar 22 22:13:21 2007
@@ -7136,9 +7136,10 @@
if (pred != ICmpInst::ICMP_NE && pred != ICmpInst::ICMP_EQ)
break;
- if ((KnownZero^TypeMask).isPowerOf2()) { // Exactly 1 possible 1?
+ APInt KnownZeroMask(KnownZero ^ TypeMask);
+ if (KnownZeroMask.isPowerOf2()) { // Exactly 1 possible 1?
bool isNE = pred == ICmpInst::ICMP_NE;
- if (Op1CV != 0 && (Op1CV != (KnownZero^TypeMask))) {
+ if (Op1CV != 0 && (Op1CV != KnownZeroMask)) {
// (X&4) == 2 --> false
// (X&4) != 2 --> true
Constant *Res = ConstantInt::get(Type::Int1Ty, isNE);
@@ -7146,7 +7147,7 @@
return ReplaceInstUsesWith(CI, Res);
}
- unsigned ShiftAmt = (KnownZero^TypeMask).logBase2();
+ unsigned ShiftAmt = KnownZeroMask.logBase2();
Value *In = Op0;
if (ShiftAmt) {
// Perform a logical shr by shiftamt.
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