Evan Cheng a70ecc2f51 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. llvm-svn: 61847		2009-01-07 02:08:57 +00:00
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Analysis	Don't try to analyze this "backward" case. This is overly conservative	2009-01-02 18:54:17 +00:00
Archive	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
Assembler	Don't spew bitcode to standard out if this test	2009-01-05 10:52:29 +00:00
Bindings/Ocaml	[PR2886] Ignore stderr from ocamlc since it prints unresolvable warnings on some platforms.	2008-10-22 12:41:54 +00:00
Bitcode	Eliminate x86.sse2.punpckh.qdq and x86.sse2.punpckl.qdq.	2008-05-24 02:56:30 +00:00
BugPoint	this is unneeded now.	2008-06-16 04:25:39 +00:00
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	Add a test case for APInt bug fix in r51999.	2008-06-05 13:42:21 +00:00
Feature	Reimplement the old and horrible bison parser for .ll files with a nice	2009-01-02 07:01:27 +00:00
FrontendAda	Teach constant folding that an inttoptr of a	2008-08-13 20:20:35 +00:00
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	Testcase for recent llvm-gcc fix	2008-11-03 14:43:31 +00:00
FrontendObjC	Add test for rdar://6394879.	2008-11-26 02:21:12 +00:00
FrontendObjC++	This is an objective-c test, not an objective-c++ one.	2008-10-06 18:42:48 +00:00
Integer	alignment of 0 is not valid.	2009-01-05 08:14:35 +00:00
lib	Fix make check on Solaris 10/x86: the default grep is not GNU grep, same for as.	2008-10-21 17:21:32 +00:00
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	Testcase for PR2894.	2008-10-15 22:34:34 +00:00
Scripts	simplify shell syntax to work better on solaris, patch by	2008-06-25 16:03:42 +00:00
TableGen	Fun x86 encoding tricks: when adding an immediate value of 128,	2008-10-17 01:33:43 +00:00
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	Failure.sh is dead, remove it.	2007-04-21 20:46:55 +00:00
TestRunner.sh	Fix a bashism in TestRunner.sh.	2008-07-28 18:41:03 +00:00