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llvm-6502/test
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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 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
TestRunner.sh Fix a bashism in TestRunner.sh. 2008-07-28 18:41:03 +00:00