Juergen Ributzka 1941431f8a SelectionDAG: Teach the legalizer to split SETCC if VSELECT needs splitting too. ... The Type Legalizer recognizes that VSELECT needs to be split, because the type is to wide for the given target. The same does not always apply to SETCC, because less space is required to encode the result of a comparison. As a result VSELECT is split and SETCC is unrolled into scalar comparisons. This commit fixes the issue by checking for VSELECT-SETCC patterns in the DAG Combiner. If a matching pattern is found, then the result mask of SETCC is promoted to the expected vector mask for the given target. This mask has usually te same size as the VSELECT return type (except for Intel KNL). Now the type legalizer will split both VSELECT and SETCC. This allows the following X86 DAG Combine code to sucessfully detect the MIN/MAX pattern. This fixes PR16695, PR17002, and <rdar://problem/14594431>. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191130 91177308-0d34-0410-b5e6-96231b3b80d8		2013-09-21 04:55:18 +00:00
..
AArch64	Implement 3 AArch64 neon instructions : umov smov ins.	2013-09-17 02:21:02 +00:00
ARM	Initialize BSSSection explicitly in InitMachOMCObjectFileInfo() to appease msvc.	2013-09-21 02:34:45 +00:00
CPP	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
Generic	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
Hexagon	Debug Info Testing: use null instead of an empty string in context field.	2013-09-09 00:12:17 +00:00
Inputs	Debug Info: add an identifier field to DICompositeType.	2013-08-26 22:39:55 +00:00
Mips	Set .reorder for the stub so that gas takes care of delay slot processing.	2013-09-21 01:37:52 +00:00
MSP430	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
NVPTX	[NVPTX] Make constant vector test case endian-independent	2013-09-19 13:14:44 +00:00
PowerPC	[PowerPC] Fix problems with large code model (PR17169).	2013-09-17 20:03:25 +00:00
R600	R600: Move code handling literal folding into R600ISelLowering.	2013-09-12 23:44:53 +00:00
SPARC	[Sparc] Correctly handle call to functions with ReturnsTwice attribute.	2013-09-05 05:32:16 +00:00
SystemZ	[SystemZ] Add unsigned compare-and-branch instructions	2013-09-18 09:56:40 +00:00
Thumb	ARM: Use "dmb sy" for barriers on M-class CPUs	2013-08-28 14:39:19 +00:00
Thumb2	[ARMv8] Prevent generation of deprecated IT blocks on ARMv8 in Thumb mode.	2013-09-09 14:21:49 +00:00
X86	SelectionDAG: Teach the legalizer to split SETCC if VSELECT needs splitting too.	2013-09-21 04:55:18 +00:00
XCore	XCore handling of thread local lowering	2013-09-09 10:42:11 +00:00