Chris Lattner 935255c984 Fix a deficiency in the spiller that Evan noticed. In particular, consider ... this code: store [stack slot #0], R10 = add R14, [stack slot #0] The spiller didn't know that the store made the value of [stackslot#0] available in R10 *IF* the store came from a copy instruction with the store folded into it. This patch teaches VirtRegMap to look at these stores and recognize the values they make available. In one case Evan provided, this code: divsd %XMM0, %XMM1 movsd %XMM1, QWORD PTR [%ESP + 40] 1) movsd QWORD PTR [%ESP + 48], %XMM1 2) movsd %XMM1, QWORD PTR [%ESP + 48] addsd %XMM1, %XMM0 3) movsd QWORD PTR [%ESP + 48], %XMM1 movsd QWORD PTR [%ESP + 4], %XMM0 turns into: divsd %XMM0, %XMM1 movsd %XMM1, QWORD PTR [%ESP + 40] addsd %XMM1, %XMM0 3) movsd QWORD PTR [%ESP + 48], %XMM1 movsd QWORD PTR [%ESP + 4], %XMM0 In this case, instruction #2 was removed because of the value made available by #1, and inst #1 was later deleted because it is now never used before the stack slot is redefined by #3. This occurs here and there in a lot of code with high spilling, on PPC most of the removed loads/stores are LSU-reject-causing loads, which is nice. On X86, things are much better (because it spills more), where we nuke about 1% of the instructions from SMG2000 and several hundred from eon. More improvements to come... llvm-svn: 25917		2006-02-02 23:29:36 +00:00
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Analysis	Add explicit iostream #includes	2006-01-22 23:19:18 +00:00
AsmParser	regenerate	2006-01-25 22:27:16 +00:00
Bytecode	Fix auto-upgrade of intrinsics to work properly with both assembly and	2006-01-27 11:49:27 +00:00
CodeGen	Fix a deficiency in the spiller that Evan noticed. In particular, consider	2006-02-02 23:29:36 +00:00
Debugger	dum de dum	2005-12-26 10:24:15 +00:00
ExecutionEngine	Allow the specification of explicit alignments for constant pool entries.	2006-01-31 22:23:14 +00:00
Linker	Rename method	2006-01-24 04:14:29 +00:00
Support	dynamically allocate plugin space as needed	2006-01-26 19:38:58 +00:00
System	Add AddSymbol() method to DynamicLibrary to work around Windows limitation	2006-01-30 04:33:51 +00:00
Target	add 64b gpr store to the possible list of isStoreToStackSlot opcodes.	2006-02-02 21:07:50 +00:00
Transforms	Improve compatibility with VC2005, patch by Morten Ofstad!	2006-01-26 20:41:32 +00:00
VMCore	validate matching constraints and remember when we see them.	2006-02-02 00:23:53 +00:00
Makefile	Add the Linker library	2004-11-14 21:54:41 +00:00