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
..
Analysis	Reapply commit 143028 with a fix: the problem was casting a ConstantExpr Mul	2011-10-27 19:16:21 +00:00
Archive	Rewrite the CMake build to use explicit dependencies between libraries,	2011-07-29 00:14:25 +00:00
AsmParser	LLLexer: Factor hex char parsing.	2011-10-27 14:08:01 +00:00
Bitcode	Also update the EH with bitcode. I missed this earlier. Thanks to Duncan for pointing it out.	2011-10-05 07:04:14 +00:00
CodeGen	Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW	2011-10-28 01:29:32 +00:00
DebugInfo	lib/DebugInfo/DWARFDebugLine.cpp: De-Unicode-ify.	2011-10-08 11:22:47 +00:00
ExecutionEngine	Adding dependencies to allow -DBUILD_SHARED_LIBS=true to complete.	2011-10-19 00:13:13 +00:00
Linker	Allow the source module to be materialized during the linking process.	2011-10-14 22:17:46 +00:00
MC	Teach our Dwarf emission to use the string pool.	2011-10-27 06:44:11 +00:00
Object	If we're searching for a symbol reference to pretty-print a scattered relocation address, and we don't find a symbol table entry, try section begin addresses as well.	2011-10-27 21:53:50 +00:00
Support	Remove the Alpha backend.	2011-10-27 22:56:32 +00:00
TableGen	Implement Paste	2011-10-19 13:04:43 +00:00
Target	Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW	2011-10-28 01:29:32 +00:00
Transforms	It is not safe to sink an alloca into a stacksave/stackrestore pair, so don't do that. <rdar://problem/10352360>	2011-10-27 01:33:51 +00:00
VMCore	Add a pinned metadata name for fpaccuracy, and document it	2011-10-27 19:19:14 +00:00
CMakeLists.txt	Move TableGen's parser and entry point into a library	2011-10-01 16:41:13 +00:00
Makefile	Remove more of llvmc and dependencies.	2011-09-20 00:34:27 +00:00