Bill Wendling 7d9f2b93a3 This test case: ... long test(long x) { return (x & 123124) | 3; } Currently compiles to: _test: orl $3, %edi movq %rdi, %rax andq $123127, %rax ret This is because instruction and DAG combiners canonicalize (or (and x, C), D) -> (and (or, D), (C | D)) However, this is only profitable if (C & D) != 0. It gets in the way of the 3-addressification because the input bits are known to be zero. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97616 91177308-0d34-0410-b5e6-96231b3b80d8		2010-03-03 00:35:56 +00:00
..
CMakeLists.txt	split and/or/xor out into one overly-large (2000LOC) file. However, I think	2010-01-05 07:50:36 +00:00
InstCombine.h	Rename ValueRequiresCast to ShouldOptimizeCast, to better reflect	2010-02-11 06:26:33 +00:00
InstCombineAddSub.cpp	Floating-point add, sub, and mul are now spelled fadd, fsub, and fmul,	2010-03-02 01:11:08 +00:00
InstCombineAndOrXor.cpp	This test case:	2010-03-03 00:35:56 +00:00
InstCombineCalls.cpp	Instcombine constant folding can normalize gep with negative index to index with large offset. When instcombine objsize checking transformation sees these geps where the offset seemingly point out of bound, it should just return "i don't know" rather than asserting.	2010-02-22 23:34:00 +00:00
InstCombineCasts.cpp	There are two ways of checking for a given type, for example isa<PointerType>(T)	2010-02-16 11:11:14 +00:00
InstCombineCompares.cpp	Fix indentation.	2010-02-24 06:46:09 +00:00
InstCombineLoadStoreAlloca.cpp	There are two ways of checking for a given type, for example isa<PointerType>(T)	2010-02-16 11:11:14 +00:00
InstCombineMulDivRem.cpp	Floating-point add, sub, and mul are now spelled fadd, fsub, and fmul,	2010-03-02 01:11:08 +00:00
InstCombinePHI.cpp	There are two ways of checking for a given type, for example isa<PointerType>(T)	2010-02-16 11:11:14 +00:00
InstCombineSelect.cpp	Don't do (X != Y) ? X : Y -> X for floating-point values; it doesn't	2010-02-23 17:17:57 +00:00
InstCombineShifts.cpp	fix a potential overflow issue Eli pointed out.	2010-01-23 23:31:46 +00:00
InstCombineSimplifyDemanded.cpp	There are two ways of checking for a given type, for example isa<PointerType>(T)	2010-02-16 11:11:14 +00:00
InstCombineVectorOps.cpp	There are two ways of checking for a given type, for example isa<PointerType>(T)	2010-02-16 11:11:14 +00:00
InstCombineWorklist.h	remove a ton of unneeded LLVMContext stuff.	2010-01-04 07:02:48 +00:00
InstructionCombining.cpp	There are two ways of checking for a given type, for example isa<PointerType>(T)	2010-02-16 11:11:14 +00:00
Makefile	make -fno-rtti the default unless a directory builds with REQUIRES_RTTI.	2010-01-24 20:43:08 +00:00