In this case it is essential that the kill is real because the spiller will
decide to omit a spill if it thinks there is a later kill.

llvm-svn: 106751

llvm-svn: 106750

as many tests as possible.

llvm-svn: 106749

when the condition is constant. This optimization shouldn't be
necessary, because codegen shouldn't be able to find dead control
paths that the IR-level optimizer can't find. And it's undesirable,
because it encourages bugpoint to leave "br i1 false" branches
in its output. And it wasn't updating the CFG.

I updated all the tests I could, but some tests are too reduced
and I wasn't able to meaningfully preserve them.

llvm-svn: 106748

llvm-svn: 106747

llvm-svn: 106746

llvm-svn: 106745

llvm-svn: 106744

llvm-svn: 106743

llvm-svn: 106740

llvm-svn: 106737

llvm-svn: 106736

llvm-svn: 106734

llvm-svn: 106731

llvm-svn: 106730

llvm-svn: 106729

llvm-svn: 106728

rdar://8013734

llvm-svn: 106725

llvm-svn: 106724

llvm-svn: 106723

Patch by Ben Ransford!

llvm-svn: 106722

bt instruction, which was exposed by r106263.

llvm-svn: 106718

llvm-svn: 106717

case where the bit mask has exactly one bit.

llvm-svn: 106716

Whiny buildbots.

llvm-svn: 106710

llvm-svn: 106709

llvm-svn: 106707

The ValueMapper used by various cloning utility maps MDNodes also.

llvm-svn: 106706

llvm-svn: 106705

llvm-svn: 106702

CoalescerPair can determine if a copy can be coalesced, and which register gets
merged away. The old logic in SimpleRegisterCoalescing had evolved into
something a bit too convoluted.

llvm-svn: 106701

llvm-svn: 106699

Do not use "ValueMap" as a name for a local variable or an argument.

llvm-svn: 106698

llvm-svn: 106697

void t(int *cp0, int *cp1, int *dp, int fmd) {
  int c0, c1, d0, d1, d2, d3;
  c0 = (*cp0++ & 0xffff) | ((*cp1++ << 16) & 0xffff0000);
  c1 = (*cp0++ & 0xffff) | ((*cp1++ << 16) & 0xffff0000);
  /* ... */
}

It code gens into something pretty bad. But with this change (analogous to the
X86 back-end), it will use ldm and generate few instructions.

llvm-svn: 106693

llvm-svn: 106692

llvm-svn: 106686

llvm-svn: 106685

llvm-svn: 106683

Add tests for different AVX cmp opcodes, also teach the x86 asm parser to understand the vcmp instruction

llvm-svn: 106678