Quentin Colombet 48ec8d3046 [InstCombiner] Expose opportunities to merge subtract and comparison. ... Several architectures use the same instruction to perform both a comparison and a subtract. The instruction selection framework does not allow to consider different basic blocks to expose such fusion opportunities. Therefore, these instructions are “merged” by CSE at MI IR level. To increase the likelihood of CSE to apply in such situation, we reorder the operands of the comparison, when they have the same complexity, so that they matches the order of the most frequent subtract. E.g., icmp A, B ... sub B, A <rdar://problem/14514580> llvm-svn: 190352		2013-09-09 20:56:48 +00:00
..
CMakeLists.txt	Tidy up a bit. No functional change.	2013-04-05 21:20:12 +00:00
InstCombine.h	Consistently use dbgs() in debug printing	2013-09-05 19:48:28 +00:00
InstCombineAddSub.cpp	Preserve fast-math flags when folding (fsub x, (fneg y)) to (fadd x, y).	2013-07-30 23:53:17 +00:00
InstCombineAndOrXor.cpp	InstCombine: allow unmasked icmps to be combined with logical ops	2013-09-04 11:57:17 +00:00
InstCombineCalls.cpp	Change behavior of calling bitcasted alias functions.	2013-07-30 20:45:05 +00:00
InstCombineCasts.cpp	Teach InstCombine about address spaces	2013-08-21 19:53:10 +00:00
InstCombineCompares.cpp	[InstCombiner] Expose opportunities to merge subtract and comparison.	2013-09-09 20:56:48 +00:00
InstCombineLoadStoreAlloca.cpp	Teach InstCombineLoadCast about address spaces.	2013-09-03 21:05:48 +00:00
InstCombineMulDivRem.cpp	Correct case of m_UIToFp to m_UIToFP to match instruction name, add m_SIToFP for consistency.	2013-07-26 17:55:00 +00:00
InstCombinePHI.cpp	Consistently use dbgs() in debug printing	2013-09-05 19:48:28 +00:00
InstCombineSelect.cpp	InstCombine: Also turn selects fed by an and into arithmetic when the types don't match.	2013-06-29 21:17:04 +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	InstCombine: Check for zero shift amounts before subtracting one causing integer overflow.	2013-08-30 14:35:35 +00:00
InstCombineVectorOps.cpp	Use type helper functions.	2013-09-06 00:37:24 +00:00
InstCombineWorklist.h	Consistently use dbgs() in debug printing	2013-09-05 19:48:28 +00:00
InstructionCombining.cpp	Consistently use dbgs() in debug printing	2013-09-05 19:48:28 +00:00
LLVMBuild.txt
Makefile