Chris Lattner 1add46ddfa Carve out a place in instcombine to put transformations which work knowing that their ... result is non-zero. Implement an example optimization (PR9814), which allows us to transform: A / ((1 << B) >>u 2) into: A >>u (B-2) which we compile into: _divu3: ## @divu3 leal -2(%rsi), %ecx shrl %cl, %edi movl %edi, %eax ret instead of: _divu3: ## @divu3 movb %sil, %cl movl $1, %esi shll %cl, %esi shrl $2, %esi movl %edi, %eax xorl %edx, %edx divl %esi, %eax ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131860 91177308-0d34-0410-b5e6-96231b3b80d8		2011-05-22 18:18:41 +00:00
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CMakeLists.txt	Removed a bunch of unnecessary target_link_libraries.	2010-09-28 22:39:14 +00:00
InstCombine.h	Make the demanded bits/elements optimizations preserve debug line information.	2011-05-19 01:20:42 +00:00
InstCombineAddSub.cpp	add is always integer, thanks to Frits for noticing this.	2011-02-17 20:55:29 +00:00
InstCombineAndOrXor.cpp	We require threse bits to be zero, too.	2011-04-28 21:38:51 +00:00
InstCombineCalls.cpp	Revert "InstCombine: Turn mul.with.overflow(X, 2) into the cheaper add.with.overflow(X, X)"	2011-05-21 18:31:42 +00:00
InstCombineCasts.cpp	More instcombine simplifications towards better debug locations.	2011-05-18 23:11:30 +00:00
InstCombineCompares.cpp	More instcombine simplifications towards better debug locations.	2011-05-18 23:11:30 +00:00
InstCombineLoadStoreAlloca.cpp	More instcombine cleanup, towards improving debug line info.	2011-05-18 23:58:37 +00:00
InstCombineMulDivRem.cpp	Carve out a place in instcombine to put transformations which work knowing that their	2011-05-22 18:18:41 +00:00
InstCombinePHI.cpp	Stop trying to have instcombine preserve LCSSA form: this was not	2011-04-27 10:55:12 +00:00
InstCombineSelect.cpp	Switch more inst insertion in instcombine to IRBuilder.	2011-05-18 18:10:28 +00:00
InstCombineShifts.cpp	Balance parentheses.	2011-04-29 08:41:23 +00:00
InstCombineSimplifyDemanded.cpp	Revert r131664 and fix it in instcombine instead. rdar://9467055	2011-05-20 00:54:37 +00:00
InstCombineVectorOps.cpp	Instcombile optimization: extractelement(cast) -> cast(extractelement)	2011-03-31 22:57:29 +00:00
InstCombineWorklist.h	InstCombine: We know the number of items initially added to the worklist map, reserve space early to avoid rehashing.	2011-03-05 16:43:46 +00:00
InstructionCombining.cpp	More instcombine cleanup, towards improving debug line info.	2011-05-18 23:58:37 +00:00
Makefile	make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.	2010-01-24 20:43:08 +00:00