Benjamin Kramer f4eeab452a DAGCombiner: Don't drop extension behavior when shrinking a load when unsafe. ... ReduceLoadWidth unconditionally drops extensions from loads. Limit it to the case when all of the bits the extension would otherwise produce are dropped by the shrink. It would be possible to shrink the load in more cases by merging the extensions, but this isn't trivial and a very rare case. I left a TODO for that case. Fixes PR16551. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185755 91177308-0d34-0410-b5e6-96231b3b80d8		2013-07-06 14:05:09 +00:00
..
AArch64	AArch64: correct CodeGen of MOVZ/MOVK combinations.	2013-07-01 19:23:10 +00:00
ARM	Stop putting operations after a tail call.	2013-07-06 12:58:45 +00:00
CPP
Generic	Debug Info: clean up usage of Verify.	2013-06-28 05:43:10 +00:00
Hexagon	Hexagon: Pass to replace tranfer/copy instructions into combine instruction	2013-05-14 18:54:06 +00:00
Inputs
MBlaze
Mips	[mips] Fix test case to check that mips64 instructions are generated.	2013-07-01 20:18:58 +00:00
MSP430	Really fix the test. Sorry for the breakage...	2013-07-01 19:51:36 +00:00
NVPTX	[NVPTX] Add support for module-scope inline asm	2013-07-01 13:00:14 +00:00
PowerPC	[PowerPC] Use mtocrf when available	2013-07-03 17:59:07 +00:00
R600	Prefix failing commands with not to make clear they are expected to fail.	2013-07-03 16:41:29 +00:00
SI
SPARC	Switch spill weights from a basic loop depth estimation to BlockFrequencyInfo.	2013-06-17 19:00:36 +00:00
SystemZ	[SystemZ] Remove no-op MVCs	2013-07-05 14:38:48 +00:00
Thumb
Thumb2	ARM: allow predicated barriers in Thumb mode	2013-06-26 16:52:32 +00:00
X86	DAGCombiner: Don't drop extension behavior when shrinking a load when unsafe.	2013-07-06 14:05:09 +00:00
XCore	[XCore] Add ISel pattern for LDWCP	2013-07-03 07:48:50 +00:00