Nadav Rotem 4ac9081c71 This commit contains a few changes that had to go in together. ... 1. Simplify xor/and/or (bitcast(A), bitcast(B)) -> bitcast(op (A,B)) (and also scalar_to_vector). 2. Xor/and/or are indifferent to the swizzle operation (shuffle of one src). Simplify xor/and/or (shuff(A), shuff(B)) -> shuff(op (A, B)) 3. Optimize swizzles of shuffles: shuff(shuff(x, y), undef) -> shuff(x, y). 4. Fix an X86ISelLowering optimization which was very bitcast-sensitive. Code which was previously compiled to this: movd (%rsi), %xmm0 movdqa .LCPI0_0(%rip), %xmm2 pshufb %xmm2, %xmm0 movd (%rdi), %xmm1 pshufb %xmm2, %xmm1 pxor %xmm0, %xmm1 pshufb .LCPI0_1(%rip), %xmm1 movd %xmm1, (%rdi) ret Now compiles to this: movl (%rsi), %eax xorl %eax, (%rdi) ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153848 91177308-0d34-0410-b5e6-96231b3b80d8		2012-04-01 19:31:22 +00:00
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ARM	This commit contains a few changes that had to go in together.	2012-04-01 19:31:22 +00:00
CellSPU	This commit contains a few changes that had to go in together.	2012-04-01 19:31:22 +00:00
CPP	Continue cleanup of LIT, getting rid of the remaining artifacts from dejagnu	2012-03-25 09:02:19 +00:00
Generic
Hexagon
MBlaze
Mips	Expand FREM.	2012-03-29 18:43:11 +00:00
MSP430
PowerPC	Add instruction itinerary for the PPC64 A2 core.	2012-04-01 19:22:40 +00:00
PTX
SPARC
Thumb	Continue cleanup of LIT, getting rid of the remaining artifacts from dejagnu	2012-03-25 09:02:19 +00:00
Thumb2	Don't kill the base register when expanding strd.	2012-03-28 23:07:03 +00:00
X86	This commit contains a few changes that had to go in together.	2012-04-01 19:31:22 +00:00
XCore	Continue cleanup of LIT, getting rid of the remaining artifacts from dejagnu	2012-03-25 09:02:19 +00:00