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c8a8544b79
llvm-mirror/lib/Transforms/InstCombine
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Benjamin Kramer c8a8544b79 InstCombine: Don't claim to be able to evaluate any shl in a zexted type. 
The shift amount may be larger than the type leading to undefined behavior.
Limit the transform to constant shift amounts. While there update the bits to
clear in the result which may enable additional optimizations.

PR15959.

llvm-svn: 181604
2013-05-10 16:26:37 +00:00
..
CMakeLists.txt Tidy up a bit. No functional change. 2013-04-05 21:20:12 +00:00
InstCombine.h Added a function scalarizePHI() that sclarizes a vector phi instruction if it has only 2 uses: one to promote the vector phi in a loop and the other use is an extract operation of one element at a constant location. 2013-04-18 19:35:39 +00:00
InstCombineAddSub.cpp InstCombine: (X ^ signbit) + C -> X + (signbit ^ C) 2013-05-06 21:21:31 +00:00
InstCombineAndOrXor.cpp Reorders two transforms that collide with each other 2013-04-14 21:15:43 +00:00
InstCombineCalls.cpp Tidy up a bit. No functional change. 2013-04-05 21:20:12 +00:00
InstCombineCasts.cpp InstCombine: Don't claim to be able to evaluate any shl in a zexted type. 2013-05-10 16:26:37 +00:00
InstCombineCompares.cpp Simplify (A & ~B) in icmp if A is a power of 2 2013-04-12 17:25:07 +00:00
InstCombineLoadStoreAlloca.cpp Tidy up a bit. No functional change. 2013-04-05 21:20:12 +00:00
InstCombineMulDivRem.cpp InstCombine: Verify the type before transforming uitofp into select. 2013-05-10 09:16:52 +00:00
InstCombinePHI.cpp Tidy up a bit. No functional change. 2013-04-05 21:20:12 +00:00
InstCombineSelect.cpp Revert r164763 because it introduces new shuffles. 2013-05-06 02:39:09 +00:00
InstCombineShifts.cpp
InstCombineSimplifyDemanded.cpp InstCombine: Don't just copy known bits from the first operand of an srem. 2013-05-09 16:32:32 +00:00
InstCombineVectorOps.cpp Tabs to spaces. No functionality change. 2013-05-04 01:08:15 +00:00
InstCombineWorklist.h
InstructionCombining.cpp Add ArrayRef constructor from None, and do the cleanups that this constructor enables 2013-05-05 00:40:33 +00:00
LLVMBuild.txt
Makefile