Evan Cheng 8f90b6eb2f The coalescer does not coalesce a virtual register to a physical register if any of the physical register's sub-register live intervals overlaps with the virtual register. This is overly conservative. It prevents a extract_subreg from being coalesced away: ... v1024 = EDI // not killed = = EDI One possible solution is for the coalescer to examine the sub-register live intervals in the same manner as the physical register. Another possibility is to examine defs and uses (when needed) of sub-registers. Both solutions are too expensive. For now, look for "short virtual intervals" and scan instructions to look for conflict instead. This is a small win on x86-64. e.g. It shaves 403.gcc by ~80 instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61847 91177308-0d34-0410-b5e6-96231b3b80d8		2009-01-07 02:08:57 +00:00
..
Analysis	Don't try to analyze this "backward" case. This is overly conservative	2009-01-02 18:54:17 +00:00
Archive
Assembler	Don't spew bitcode to standard out if this test	2009-01-05 10:52:29 +00:00
Bindings/Ocaml
Bitcode
BugPoint
CodeGen	The coalescer does not coalesce a virtual register to a physical register if any of the physical register's sub-register live intervals overlaps with the virtual register. This is overly conservative. It prevents a extract_subreg from being coalesced away:	2009-01-07 02:08:57 +00:00
DebugInfo	This test passes again, unXFAIL.	2009-01-05 09:30:47 +00:00
ExecutionEngine
Feature	Reimplement the old and horrible bison parser for .ll files with a nice	2009-01-02 07:01:27 +00:00
FrontendAda
FrontendC	Strength test.	2009-01-05 21:27:59 +00:00
FrontendC++	This test works again for Darwin because a patch was reverted.	2008-12-19 19:08:13 +00:00
FrontendFortran
FrontendObjC
FrontendObjC++
Integer	alignment of 0 is not valid.	2009-01-05 08:14:35 +00:00
lib
Linker	Reimplement the old and horrible bison parser for .ll files with a nice	2009-01-02 07:01:27 +00:00
LLVMC	Use ignore & grep instead of XFAIL.	2008-12-21 07:47:49 +00:00
Other
Scripts
TableGen
Transforms	make m_ConstantInt(int64_t) safely match ConstantInt's that are larger than i64.	2009-01-05 23:45:50 +00:00
Verifier	Reimplement the old and horrible bison parser for .ll files with a nice	2009-01-02 07:01:27 +00:00
Makefile	* Quoted the executable 'runtest' to emphasize the binary needed;	2009-01-01 20:26:05 +00:00
Makefile.tests
TestRunner.sh