Hal Finkel 4a7156d421 Fix the aggressive anti-dep breaker's subregister definition handling ... The aggressive anti-dependency breaker scans instructions, bottom-up, within the scheduling region in order to find opportunities where register renaming can be used to break anti-dependencies. Unfortunately, the aggressive anti-dep breaker was treating a register definition as defining all of that register's aliases (including super registers). This behavior is incorrect when the super register is live and there are other definitions of subregisters of the super register. For example, given the following sequence: %CR2EQ<def> = CROR %CR3UN, %CR3UN<kill> %CR2GT<def> = IMPLICIT_DEF %X4<def> = MFOCRF8 %CR2 the analysis of the first subregister definition would work as expected: Anti: %CR2GT<def> = IMPLICIT_DEF Def Groups: CR2GT=g194->g0(via CR2) Antidep reg: CR2GT (zero group) Use Groups: but the analysis of the second one would not: Anti: %CR2EQ<def> = CROR %CR3UN, %CR3UN<kill> Def Groups: CR2EQ=g195 Antidep reg: CR2EQ Rename Candidates for Group g195: ... because, when processing the %CR2GT<def>, we'd mark all super registers of %CR2GT (%CR2 in this case) as defined. As a result, when processing %CR2EQ<def>, %CR2 no longer appears to be live, and %CR2EQ<def>'s group is not %unioned with the %CR2 group. I don't have an in-tree test case for this yet (and even if I did, I don't have a small one). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@202294 91177308-0d34-0410-b5e6-96231b3b80d8		2014-02-26 20:20:30 +00:00
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Analysis	Constify the Optnone checks in IR passes.	2014-02-26 01:23:26 +00:00
AsmParser
Bitcode
CodeGen	Fix the aggressive anti-dep breaker's subregister definition handling	2014-02-26 20:20:30 +00:00
DebugInfo
ExecutionEngine
IR	Fix typo. Thanks to Roman Divacky for noticing it.	2014-02-26 17:05:38 +00:00
IRReader
LineEditor	[CMake] Use LINK_LIBS instead of target_link_libraries().	2014-02-26 06:41:29 +00:00
Linker	Compare DataLayout by Value, not by pointer.	2014-02-26 17:02:08 +00:00
LTO
MC
Object	Relax COFF string table check	2014-02-26 19:51:44 +00:00
Option
Support	[CMake] BUILD_SHARED_LIBS: Fixup for r202261: Give PULIC to system_libs in LLVMSupport.	2014-02-26 12:18:55 +00:00
TableGen
Target	ARMv8 IfConversion must skip narrow instructions that a) define CPSR and b) wouldn't affect CPSR in an IT block	2014-02-26 11:27:28 +00:00
Transforms	GlobalOpt: Apply fastcc to internal x86_thiscallcc functions	2014-02-26 19:57:30 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile