Chris Lattner b884fe867e Rewrite chain handling validation and input TokenFactor handling ... stuff now that we don't care about emulating the old broken behavior of the old isel. This eliminates the 'CheckChainCompatible' check (along with IsChainCompatible) which did an incorrect and inefficient scan *up* the chain nodes which happened as the pattern was being formed and does the validation at the end in HandleMergeInputChains when it forms a structural pattern. This scans "down" the graph, which means that it is quickly bounded by nodes already selected. This also handles token factors that get "trapped" in the dag. Removing the CheckChainCompatible nodes also shrinks the generated tables by about 6K for X86 (down to 83K). There are two pieces remaining before I can nuke PreprocessRMW: 1. I xfailed a test because we're now producing worse code in a case that has nothing to do with the change: it turns out that our use of MorphNodeTo will leave dead nodes in the graph which (depending on how the graph is walked) end up causing bogus uses of chains and blocking matches. This is really bad for other reasons, so I'll fix this in a follow-up patch. 2. CheckFoldableChainNode needs to be improved to handle the TF. llvm-svn: 97539		2010-03-02 02:22:10 +00:00
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ARM	Check for comparisons of +/- zero when optimizing less-than-or-equal and	2010-02-24 22:15:53 +00:00
Alpha	Fix PR2590 by making PatternSortingPredicate actually be	2010-03-01 22:09:11 +00:00
Blackfin	Change the scheduler from adding nodes in allnodes order	2010-02-24 06:11:37 +00:00
CBackend	Eliminate more uses of llvm-as and llvm-dis.	2009-09-09 00:09:15 +00:00
CPP	fix PR5295 where the .ll parser didn't reject a function after a global	2009-10-25 23:22:50 +00:00
CellSPU	don't let asm-verbose break the check-next lines in these tests.	2010-01-19 06:39:54 +00:00
Generic	stop using anders-aa	2010-03-01 20:24:05 +00:00
MBlaze	Adding the MicroBlaze backend.	2010-02-23 19:15:24 +00:00
MSP430	Change the scheduler from adding nodes in allnodes order	2010-02-24 06:11:37 +00:00
Mips	Delete useless trailing semicolons.	2010-01-05 17:55:26 +00:00
PIC16	Reapply things reverted back in 97220, with the fixed test case.	2010-02-26 17:59:28 +00:00
PowerPC	add some random nounwinds.	2010-02-28 20:36:49 +00:00
SPARC	add support for the sparcv9-*-* target triple to turn on	2010-02-04 06:34:01 +00:00
SystemZ	Teach dag combine to fold the following transformation more aggressively:	2010-01-06 19:38:29 +00:00
Thumb	Run the pre-register allocation tail duplication pass by default. Remove	2010-01-16 00:29:50 +00:00
Thumb2	Create a stack frame on ARM when	2010-02-24 22:43:17 +00:00
X86	Rewrite chain handling validation and input TokenFactor handling	2010-03-02 02:22:10 +00:00
XCore	Fix XCoreTargetLowering::isLegalAddressingMode() to handle VoidTy.	2010-02-26 16:44:51 +00:00