Dan Gohman 2ba60e5930 Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW ... on every node as it legalizes them. This makes it easier to use hasOneUse() heuristics, since unneeded nodes can be removed from the DAG earlier. Make LegalizeOps visit the DAG in an operands-last order. It previously used operands-first, because LegalizeTypes has to go operands-first, and LegalizeTypes used to be part of LegalizeOps, but they're now split. The operands-last order is more natural for several legalization tasks. For example, it allows lowering code for nodes with floating-point or vector constants to see those constants directly instead of seeing the lowered form (often constant-pool loads). This makes some things somewhat more complicated today, though it ought to allow things to be simpler in the future. It also fixes some bugs exposed by Legalizing using RAUW aggressively. Remove the part of LegalizeOps that attempted to patch up invalid chain operands on libcalls generated by LegalizeTypes, since it doesn't work with the new LegalizeOps traversal order. Instead, define what LegalizeTypes is doing to be correct, and transfer the responsibility of keeping calls from having overlapping calling sequences into the scheduler. Teach the scheduler to model callseq_begin/end pairs as having a physical register definition/use to prevent calls from having overlapping calling sequences. This is also somewhat complicated, though there are ways it might be simplified in the future. This addresses rdar://9816668, rdar://10043614, rdar://8434668, and others. Please direct high-level questions about this patch to management. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143177 91177308-0d34-0410-b5e6-96231b3b80d8		2011-10-28 01:29:32 +00:00
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ARM	Also set addrmode6 alignment when align==size.	2011-10-27 22:39:16 +00:00
CBackend	Only run tests in test/CodeGen/CBackend/X86 when both X86 and CBackend are supported	2011-09-26 06:44:27 +00:00
CellSPU	Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW	2011-10-28 01:29:32 +00:00
CPP	manually upgrade a bunch of tests to modern syntax, and remove some that	2011-06-17 03:14:27 +00:00
Generic	Remove the the test which checks the saving of a vector of booleans into memory.	2011-10-16 19:06:06 +00:00
MBlaze	Change the default scheduler from Latency to ILP, since Latency	2011-10-24 17:45:02 +00:00
Mips	Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW	2011-10-28 01:29:32 +00:00
MSP430	Remove the explicit request for "Latency" scheduling from MSP430,	2011-10-24 17:53:16 +00:00
PowerPC	Change the default scheduler from Latency to ILP, since Latency	2011-10-24 17:45:02 +00:00
PTX	Change the default scheduler from Latency to ILP, since Latency	2011-10-24 17:45:02 +00:00
SPARC	make the asmparser reject function and type redefinitions. 'Merging' hasn't been	2011-06-17 07:06:44 +00:00
Thumb	Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW	2011-10-28 01:29:32 +00:00
Thumb2	ARM Darwin default relocation model is PIC.	2011-09-30 17:41:35 +00:00
X86	Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW	2011-10-28 01:29:32 +00:00
XCore	Associate a MemOperand with LDWCP nodes introduced during ISel.	2011-09-12 14:43:23 +00:00