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Jingyue Wu 5208cc5dbe [MachineSink] Use the real post dominator tree 
Summary:
Fixes a FIXME in MachineSinking. Instead of using the simple heuristics
in isPostDominatedBy, use the real MachinePostDominatorTree. The old
heuristics caused instructions to sink unnecessarily, and might create
register pressure.

Test Plan:
Added a NVPTX codegen test to verify that our change is in effect. It also
shows the unnecessary register pressure caused by over-sinking. Updated
affected tests in AArch64 and X86.

Reviewers: eliben, meheff, Jiangning

Reviewed By: Jiangning

Subscribers: jholewinski, aemerson, mcrosier, llvm-commits

Differential Revision: http://reviews.llvm.org/D4814

llvm-svn: 216862
 		2014-09-01 03:47:25 +00:00
..
AArch64 [MachineSink] Use the real post dominator tree 2014-09-01 03:47:25 +00:00
ARM [ARM] Add Thumb-2 code size optimization test for ASR (register). 2014-08-29 17:19:00 +00:00
CPP IR: add "cmpxchg weak" variant to support permitted failure. 2014-06-13 14:24:07 +00:00
Generic Use "weak alias" instead of "alias weak" 2014-07-30 22:51:54 +00:00
Hexagon DebugInfo: Assert that any CU for which debug_loc lists are emitted, has at least one range. 2014-08-06 00:21:25 +00:00
Inputs
…
MSP430 Do not assume the value passed to memset is an i32. 2014-08-29 08:23:53 +00:00
Mips [mips] Don't use odd-numbered float registers for double arguments for fastcc 2014-08-22 09:23:22 +00:00
NVPTX [MachineSink] Use the real post dominator tree 2014-09-01 03:47:25 +00:00
PowerPC [PowerPC] Add support for dcbtst and icbt (prefetch) 2014-08-23 23:21:04 +00:00
R600 R600/SI: Use mad for fsub + fmul 2014-08-29 16:01:14 +00:00
SPARC IR: add "cmpxchg weak" variant to support permitted failure. 2014-06-13 14:24:07 +00:00
SystemZ IR: add "cmpxchg weak" variant to support permitted failure. 2014-06-13 14:24:07 +00:00
Thumb ARM / x86_64 varargs: Don't save regparms in prologue without va_start 2014-08-22 21:59:26 +00:00
Thumb2 ARM / x86_64 varargs: Don't save regparms in prologue without va_start 2014-08-22 21:59:26 +00:00
X86 [MachineSink] Use the real post dominator tree 2014-09-01 03:47:25 +00:00
XCore llvm/test/CodeGen/XCore/dwarf_debug.ll: Fix not to be affected by *-win32. 2014-07-04 11:58:03 +00:00