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Use UnknownBIts[BitWidth-1] instead of UnknownBIts & SignBits.
author
Zhou Sheng
<zhousheng00@gmail.com>
Wed, 28 Mar 2007 05:15:57 +0000
(
05:15
+0000)
committer
Zhou Sheng
<zhousheng00@gmail.com>
Wed, 28 Mar 2007 05:15:57 +0000
(
05:15
+0000)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35418
91177308
-0d34-0410-b5e6-
96231b3b80d8
lib/Transforms/Scalar/InstructionCombining.cpp
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diff --git
a/lib/Transforms/Scalar/InstructionCombining.cpp
b/lib/Transforms/Scalar/InstructionCombining.cpp
index 728880919501a7e47c86829349f8e9f1fde5fb7c..1c39f050f5013603b60ecc3d653300433035c3a8 100644
(file)
--- a/
lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/
lib/Transforms/Scalar/InstructionCombining.cpp
@@
-851,7
+851,7
@@
static void ComputeSignedMinMaxValuesFromKnownBits(const Type *Ty,
Min = KnownOne;
Max = KnownOne|UnknownBits;
- if (
(SignBit & UnknownBits) != 0
) { // Sign bit is unknown
+ if (
UnknownBits[BitWidth-1]
) { // Sign bit is unknown
Min |= SignBit;
Max &= ~SignBit;
}