Nadav Rotem 303a9b2e50 Patch by Shuxin Yang <shuxin.llvm@gmail.com>. ... Original message: The attached is the fix to radar://11663049. The optimization can be outlined by following rules: (select (x != c), e, c) -> select (x != c), e, x), (select (x == c), c, e) -> select (x == c), x, e) where the <c> is an integer constant. The reason for this change is that : on x86, conditional-move-from-constant needs two instructions; however, conditional-move-from-register need only one instruction. While the LowerSELECT() sounds to be the most convenient place for this optimization, it turns out to be a bad place. The reason is that by replacing the constant <c> with a symbolic value, it obscure some instruction-combining opportunities which would otherwise be very easy to spot. For that reason, I have to postpone the change to last instruction-combining phase. The change passes the test of "make check-all -C <build-root/test" and "make -C project/test-suite/SingleSource". llvm-svn: 165661		2012-10-10 21:31:55 +00:00
..
ARM	Fix for LDRB instruction:	2012-10-10 11:43:40 +00:00
CellSPU	Fix broken tests.	2012-10-02 15:49:34 +00:00
CPP
Generic	BranchProb: modify the definition of an edge in BranchProbabilityInfo to handle	2012-08-24 18:14:27 +00:00
Hexagon	LLVM Bug Fix 13709: Remove needless lsr(Rp, #32) instruction access the	2012-09-05 16:01:40 +00:00
MBlaze
Mips	Implement MipsTargetLowering::CanLowerReturn.	2012-10-10 01:27:09 +00:00
MSP430	Reapply r161633-161634 "Partition use lists so defs always come before uses.""	2012-08-10 00:21:30 +00:00
NVPTX
PowerPC	When generating spill and reload code for vector registers on PowerPC,	2012-10-10 21:25:01 +00:00
SPARC	Fix broken tests.	2012-10-02 15:49:34 +00:00
Thumb	Fix Thumb2 fixup kind in the integrated-as.	2012-09-01 15:06:36 +00:00
Thumb2	Add LLVM support for Swift.	2012-09-29 21:43:49 +00:00
X86	Patch by Shuxin Yang <shuxin.llvm@gmail.com>.	2012-10-10 21:31:55 +00:00
XCore