Tim Shen c6dc619045 [SelectionDAG] Fix CombineToPreIndexedLoadStore O(n^2) behavior ... This patch consists of two parts: a performance fix in DAGCombiner.cpp and a correctness fix in SelectionDAG.cpp. The test case tests the bug that's uncovered by the performance fix, and fixed by the correctness fix. The performance fix keeps the containers required by the hasPredecessorHelper (which is a lazy DFS) and reuse them. Since hasPredecessorHelper is called in a loop, the overall efficiency reduced from O(n^2) to O(n), where n is the number of SDNodes. The correctness fix keeps iterating the neighbor list even if it's time to early return. It will return after finishing adding all neighbors to Worklist, so that no neighbors are discarded due to the original early return. llvm-svn: 259691		2016-02-03 20:58:55 +00:00
..
AArch64	[ScheduleDAGInstrs::buildSchedGraph()] Handling of memory dependecies rewritten.	2016-02-03 17:52:29 +00:00
AMDGPU	[ScheduleDAGInstrs::buildSchedGraph()] Handling of memory dependecies rewritten.	2016-02-03 17:52:29 +00:00
ARM	ARM: support TLS for WoA	2016-02-03 18:21:59 +00:00
BPF	Revert "Change memcpy/memset/memmove to have dest and source alignments."	2015-11-19 05:56:52 +00:00
CPP
Generic	Remove autoconf support	2016-01-26 21:29:08 +00:00
Hexagon	[Hexagon] Use general purpose registers to spill pred/mod registers into	2016-01-22 19:15:58 +00:00
Inputs	DI: Reverse direction of subprogram -> function edge.	2015-11-05 22:03:56 +00:00
Mips	[mips] Add SHF_MIPS_GPREL flag to the MIPS .sbss and .sdata sections	2016-02-03 11:50:22 +00:00
MIR	Reapply r257105 "[Verifier] Check that debug values have proper size"	2016-01-15 00:46:17 +00:00
MSP430	Revert "Change memcpy/memset/memmove to have dest and source alignments."	2015-11-19 05:56:52 +00:00
NVPTX	[CUDA] Die if we ask the NVPTX backend to emit a global ctor/dtor.	2016-01-30 01:07:38 +00:00
PowerPC	[SelectionDAG] Fix CombineToPreIndexedLoadStore O(n^2) behavior	2016-02-03 20:58:55 +00:00
SPARC	[SPARC] Revamp AnalyzeBranch and add ReverseBranchCondition.	2016-01-13 04:44:14 +00:00
SystemZ	[SystemZ] Fix wrong-code generation for certain always-false conditions	2016-02-01 18:31:19 +00:00
Thumb	[MC] Use .p2align instead of .align	2016-01-26 00:03:25 +00:00
Thumb2	Revert r259662, which caused regressions on polly tests.	2016-02-03 18:05:57 +00:00
WebAssembly	[WebAssembly] Fix uses of FrameIndex as store values	2016-01-30 21:43:08 +00:00
WinEH	Revert r258580 and r258581.	2016-02-01 03:29:38 +00:00
X86	[X86][AVX] Add support for 64-bit VZEXT_LOAD of 256/512-bit vectors to EltsFromConsecutiveLoads	2016-02-03 09:41:59 +00:00
XCore	[MC] Use .p2align instead of .align	2016-01-26 00:03:25 +00:00