Changes in directory llvm/lib/Transforms/Scalar:
InstructionCombining.cpp updated: 1.657 -> 1.658
---
Log message:
For expression like
"APInt::getAllOnesValue(ShiftAmt).zextOrCopy(BitWidth)",
to handle ShiftAmt == BitWidth situation, use zextOrCopy() instead of
zext().
---
Diffs of the changes: (+3 -3)
InstructionCombining.cpp | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
Index: llvm/lib/Transforms/Scalar/InstructionCombining.cpp
diff -u llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.657
llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.658
--- llvm/lib/Transforms/Scalar/InstructionCombining.cpp:1.657 Mon Mar 12
21:23:10 2007
+++ llvm/lib/Transforms/Scalar/InstructionCombining.cpp Tue Mar 13 01:40:59 2007
@@ -1995,7 +1995,7 @@
RHSKnownZero <<= ShiftAmt;
RHSKnownOne <<= ShiftAmt;
// low bits known zero.
- RHSKnownZero |= APInt::getAllOnesValue(ShiftAmt).zext(BitWidth);
+ RHSKnownZero |= APInt::getAllOnesValue(ShiftAmt).zextOrCopy(BitWidth);
}
break;
case Instruction::LShr:
@@ -2012,7 +2012,7 @@
assert((RHSKnownZero & RHSKnownOne) == 0 &&
"Bits known to be one AND zero?");
// Compute the new bits that are at the top now.
- APInt HighBits(APInt::getAllOnesValue(ShiftAmt).zext(BitWidth).shl(
+ APInt HighBits(APInt::getAllOnesValue(ShiftAmt).zextOrCopy(BitWidth).shl(
BitWidth - ShiftAmt));
RHSKnownZero &= TypeMask;
RHSKnownOne &= TypeMask;
@@ -2046,7 +2046,7 @@
assert((RHSKnownZero & RHSKnownOne) == 0 &&
"Bits known to be one AND zero?");
// Compute the new bits that are at the top now.
- APInt HighBits(APInt::getAllOnesValue(ShiftAmt).zext(BitWidth).shl(
+ APInt HighBits(APInt::getAllOnesValue(ShiftAmt).zextOrCopy(BitWidth).shl(
BitWidth - ShiftAmt));
RHSKnownZero &= TypeMask;
RHSKnownOne &= TypeMask;
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