Kai Nacke ceb3b46490 PR16726: extend rol/ror matching ... C-like languages promote types like unsigned short to unsigned int before performing an arithmetic operation. Currently the rotate matcher in the DAGCombiner does not consider this situation. This commit extends the DAGCombiner in the way that the pattern (or (shl ([az]ext x), (*ext y)), (srl ([az]ext x), (*ext (sub 32, y)))) is folded into ([az]ext (rotl x, y)) The matching is restricted to aext and zext because in this cases the upper bits are either undefined or known. Test case is included. This fixes PR16726. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191049 91177308-0d34-0410-b5e6-96231b3b80d8		2013-09-19 23:00:28 +00:00
..
AArch64	Implement 3 AArch64 neon instructions : umov smov ins.	2013-09-17 02:21:02 +00:00
ARM	[ARMv8] Add support for the v8 cryptography extensions.	2013-09-19 11:59:01 +00:00
CPP
Generic
Hexagon	Debug Info Testing: use null instead of an empty string in context field.	2013-09-09 00:12:17 +00:00
Inputs
Mips	Fix two issues regarding Got pointer (GP) setup.	2013-09-18 22:46:09 +00:00
MSP430
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
Thumb2	[ARMv8] Prevent generation of deprecated IT blocks on ARMv8 in Thumb mode.	2013-09-09 14:21:49 +00:00
X86	PR16726: extend rol/ror matching	2013-09-19 23:00:28 +00:00
XCore	XCore handling of thread local lowering	2013-09-09 10:42:11 +00:00