Sanjay Patel 76b12c4bf0 [InstCombine] transform bitcasted bitwise logic ops with constants (PR26702) ... Given that we're not actually reducing the instruction count in the included regression tests, I think we would call this a canonicalization step. The motivation comes from the example in PR26702: https://llvm.org/bugs/show_bug.cgi?id=26702 If we hoist the bitwise logic ahead of the bitcast, the previously unoptimizable example of: define <4 x i32> @is_negative(<4 x i32> %x) { %lobit = ashr <4 x i32> %x, <i32 31, i32 31, i32 31, i32 31> %not = xor <4 x i32> %lobit, <i32 -1, i32 -1, i32 -1, i32 -1> %bc = bitcast <4 x i32> %not to <2 x i64> %notnot = xor <2 x i64> %bc, <i64 -1, i64 -1> %bc2 = bitcast <2 x i64> %notnot to <4 x i32> ret <4 x i32> %bc2 } Simplifies to the expected: define <4 x i32> @is_negative(<4 x i32> %x) { %lobit = ashr <4 x i32> %x, <i32 31, i32 31, i32 31, i32 31> ret <4 x i32> %lobit } Differential Revision: http://reviews.llvm.org/D17583 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262645 91177308-0d34-0410-b5e6-96231b3b80d8		2016-03-03 19:19:04 +00:00
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CMakeLists.txt	Use ADDITIONAL_HEADER_DIRS in all LLVM CMake projects.	2015-02-11 03:28:02 +00:00
InstCombineAddSub.cpp	Remove uses of builtin comma operator.	2016-02-18 22:09:30 +00:00
InstCombineAndOrXor.cpp	[InstCombine] transform bitcasted bitwise logic ops with constants (PR26702)	2016-03-03 19:19:04 +00:00
InstCombineCalls.cpp	[x86, InstCombine] transform more x86 masked loads to LLVM intrinsics	2016-02-29 23:59:00 +00:00
InstCombineCasts.cpp	revert r262424 because there's a *clang test* for AArch64 that checks -O3 asm output	2016-03-02 01:04:09 +00:00
InstCombineCompares.cpp	Remove uses of builtin comma operator.	2016-02-18 22:09:30 +00:00
InstCombineInternal.h	[InstCombine] add helper function to foldCastedBitwiseLogic() ; NFCI	2016-02-23 16:36:07 +00:00
InstCombineLoadStoreAlloca.cpp	Explode store of arrays in instcombine	2016-03-02 22:36:45 +00:00
InstCombineMulDivRem.cpp	Remove uses of builtin comma operator.	2016-02-18 22:09:30 +00:00
InstCombinePHI.cpp	Fixed typo in r260530	2016-02-11 16:46:13 +00:00
InstCombineSelect.cpp	function names start with a lowercase letter; NFC	2016-02-01 22:23:39 +00:00
InstCombineShifts.cpp	function names start with a lowercase letter; NFC	2016-02-01 22:23:39 +00:00
InstCombineSimplifyDemanded.cpp	function names start with a lowercase letter; NFC	2016-02-01 22:23:39 +00:00
InstCombineVectorOps.cpp	Fix an issue where fast math flags were dropped during scalarization.	2016-03-01 19:35:52 +00:00
InstructionCombining.cpp	Perform InstructioinCombiningPass before SampleProfile pass.	2016-03-01 22:53:02 +00:00
LLVMBuild.txt	Update libdeps since TLI was moved from Target to Analysis in r226078.	2015-01-15 05:21:00 +00:00