Chris Lattner 6cdf2ea98e implement the first part of PR8882: when lowering an inbounds ... gep to explicit addressing, we know that none of the intermediate computation overflows. This could use review: it seems that the shifts certainly wouldn't overflow, but could the intermediate adds overflow if there is a negative index? Previously the testcase would instcombine to: define i1 @test(i64 %i) { %p1.idx.mask = and i64 %i, 4611686018427387903 %cmp = icmp eq i64 %p1.idx.mask, 1000 ret i1 %cmp } now we get: define i1 @test(i64 %i) { %cmp = icmp eq i64 %i, 1000 ret i1 %cmp } git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125271 91177308-0d34-0410-b5e6-96231b3b80d8		2011-02-10 07:11:16 +00:00
..
CMakeLists.txt	Removed a bunch of unnecessary target_link_libraries.	2010-09-28 22:39:14 +00:00
InstCombine.h	Call SimplifyFDivInst() in InstCombiner::visitFDiv().	2011-01-29 17:50:27 +00:00
InstCombineAddSub.cpp	implement the first part of PR8882: when lowering an inbounds	2011-02-10 07:11:16 +00:00
InstCombineAndOrXor.cpp	more cleanups, notably bitcast isn't used for "signed to unsigned type	2011-02-10 05:17:27 +00:00
InstCombineCalls.cpp	Teach instcombine about the rest of the SSE and SSE2 conversion	2011-01-10 07:19:37 +00:00
InstCombineCasts.cpp	implement an instcombine xform that canonicalizes casts outside of and-with-constant operations.	2011-01-15 06:32:33 +00:00
InstCombineCompares.cpp	Enhance the "compare with shift" and "compare with div"	2011-02-10 05:23:05 +00:00
InstCombineLoadStoreAlloca.cpp	Move getOrEnforceKnownAlignment out of instcombine into Transforms/Utils.	2010-12-25 20:37:57 +00:00
InstCombineMulDivRem.cpp	Enhance a bunch of transformations in instcombine to start generating	2011-02-10 05:36:31 +00:00
InstCombinePHI.cpp	Teach InstructionSimplify about phi nodes. I chose to have it simply	2010-11-14 13:30:18 +00:00
InstCombineSelect.cpp	Fold select + select where both selects are on the same condition.	2011-01-28 03:28:10 +00:00
InstCombineShifts.cpp	Enhance a bunch of transformations in instcombine to start generating	2011-02-10 05:36:31 +00:00
InstCombineSimplifyDemanded.cpp	teach SimplifyDemandedBits that exact shifts demand the bits they	2011-02-10 05:09:34 +00:00
InstCombineVectorOps.cpp	PR5207: Rename overloaded APInt methods set(), clear(), flip() to	2010-12-01 08:53:58 +00:00
InstCombineWorklist.h	I got tired of VISIBILITY_HIDDEN colliding with the gcc enum. Rename it	2010-05-11 20:16:09 +00:00
InstructionCombining.cpp	Conservatively, clear optional flags, such as nsw, when performing	2011-02-02 02:05:46 +00:00
Makefile	make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.	2010-01-24 20:43:08 +00:00