Duncan Sands 47d9dcc584 Fix PR3117: not all nodes being legalized. The ... essential problem was that the DAG can contain random unused nodes which were never analyzed. When remapping a value of a node being processed, such a node may become used and need to be analyzed; however due to operands being transformed during analysis the node may morph into a different one. Users of the morphing node need to be updated, and this wasn't happening. While there I added a bunch of documentation and sanity checks, so I (or some other poor soul) won't have to scratch their head over this stuff so long trying to remember how it was all supposed to work next time some obscure problem pops up! The extra sanity checking exposed a few places where invariants weren't being preserved, so those are fixed too. Since some of the sanity checking is expensive, I added a flag to turn it on. It is also turned on when building with ENABLE_EXPENSIVE_CHECKS=1. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60797 91177308-0d34-0410-b5e6-96231b3b80d8		2008-12-09 21:33:20 +00:00
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Alpha	Correct some thinkos in the expansion of ADD/SUB	2008-11-12 08:23:26 +00:00
ARM	Clean up some ARM GV asm printing out; minor fixes to match what gcc does.	2008-12-06 02:00:55 +00:00
CBackend	Fix PR2907 by digging through constant expressions to find FP constants that	2008-10-22 04:53:16 +00:00
CellSPU	CellSPU:	2008-12-09 06:12:03 +00:00
CPP	Put CPPBackend tests into their own directory and run them only if they're	2008-07-10 22:35:32 +00:00
Generic	Test add-with-overflow with fast ISel.	2008-11-24 05:23:38 +00:00
IA64	sabre brings to my attention that the 'tr' suffix is also obsolete	2008-05-20 21:00:03 +00:00
Mips	Fix PR2667: add soft float support for sint_to_fp/uint_to_fp	2008-11-10 17:36:26 +00:00
PowerPC	Re-did 60519. It turns out Darwin's handling of hidden visibility symbols are a bit more complicate than I expected. Both declarations and weak definitions still need a stub indirection. However, the stubs are in data section and they contain the addresses of the actual symbols.	2008-12-05 01:06:39 +00:00
SPARC	Add testcase for 'r' inline asm operand	2008-10-10 20:28:59 +00:00
X86	Fix PR3117: not all nodes being legalized. The	2008-12-09 21:33:20 +00:00
XCore	Add support for ISD::TRAP to the XCore backend	2008-12-03 10:59:16 +00:00