David Majnemer 024d943bca Reorders two transforms that collide with each other ... One performs: (X == 13 | X == 14) -> X-13 <u 2 The other: (A == C1 || A == C2) -> (A & ~(C1 ^ C2)) == C1 The problem is that there are certain values of C1 and C2 that trigger both transforms but the first one blocks out the second, this generates suboptimal code. Reordering the transforms should be better in every case and allows us to do interesting stuff like turn: %shr = lshr i32 %X, 4 %and = and i32 %shr, 15 %add = add i32 %and, -14 %tobool = icmp ne i32 %add, 0 into: %and = and i32 %X, 240 %tobool = icmp ne i32 %and, 224 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179493 91177308-0d34-0410-b5e6-96231b3b80d8		2013-04-14 21:15:43 +00:00
..
CMakeLists.txt	Tidy up a bit. No functional change.	2013-04-05 21:20:12 +00:00
InstCombine.h	Remove trailing spaces.	2013-01-14 23:16:36 +00:00
InstCombineAddSub.cpp	Tidy up a bit. No functional change.	2013-04-05 21:20:12 +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	Make InstCombineCasts.cpp:OptimizeIntToFloatBitCast endian safe.	2013-03-26 15:36:14 +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	Tidy up a bit. No functional change.	2013-04-05 21:20:12 +00:00
InstCombinePHI.cpp	Tidy up a bit. No functional change.	2013-04-05 21:20:12 +00:00
InstCombineSelect.cpp	Tidy up a bit. No functional change.	2013-04-05 21:20:12 +00:00
InstCombineShifts.cpp	Revert r174152. The shift amount may overflow and in that case this transformation is illegal.	2013-02-01 07:59:33 +00:00
InstCombineSimplifyDemanded.cpp	Move all of the header files which are involved in modelling the LLVM IR	2013-01-02 11:36:10 +00:00
InstCombineVectorOps.cpp	Fix for wrong instcombine on vector insert/extract	2013-04-11 15:10:09 +00:00
InstCombineWorklist.h	Remove trailing spaces.	2013-01-14 23:16:36 +00:00
InstructionCombining.cpp	Preserve fast-math flags after reassociation and commutation. Update test cases	2013-02-07 01:40:15 +00:00
LLVMBuild.txt	LLVMBuild: Remove trailing newline, which irked me.	2011-12-12 19:48:00 +00:00
Makefile