llvm-svn: 45787

Clean up StrongPHIElimination a bit, and add some more comments to the internal structures.  There's
still more work to do on this front.

llvm-svn: 45783

llvm-svn: 45781

llvm-svn: 45775

llvm-svn: 45774

llvm-svn: 45773

llvm-svn: 45768

llvm-svn: 45766

void test(long long *P) { *P ^= 1; }

into just:

_test:
	movl	4(%esp), %eax
	xorl	$1, (%eax)
	ret

instead of code like this:

_test:
	movl	4(%esp), %ecx
        xorl    $1, (%ecx)
	movl	4(%ecx), %edx
	movl	%edx, 4(%ecx)
	ret

llvm-svn: 45762

llvm-svn: 45759

on 64-bit builds.  Analysis and original patch
by Török Edwin.  Code audit found another place
with the same problem, also fixed here.

llvm-svn: 45746

llvm-svn: 45745

the code generated is not wonderful.  This turns a miscompilation into
a code quality bug (noted in the ppc readme).  This fixes PR642, which
is over 2 years old (!).  Nate, please review this.

llvm-svn: 45742

llvm-svn: 45738

llvm-svn: 45734

llvm-svn: 45733

llvm-svn: 45731

llvm-svn: 45727

llvm-svn: 45726

llvm-svn: 45725

llvm-svn: 45723

llvm-svn: 45720

llvm-svn: 45719

llvm-svn: 45718

to be used for the force_interpreter parameter...
Spotted by gcc-4.2.

llvm-svn: 45714

llvm-svn: 45712

incompatibility.

llvm-svn: 45704

llvm-svn: 45703

llvm-svn: 45701

llvm-svn: 45700

llvm-svn: 45699

llvm-svn: 45698

llvm-svn: 45697

Make MachineInstr::getDesc return a reference instead
of a pointer, since it can never be null.

llvm-svn: 45695

llvm-svn: 45693

all clients over to using predicates instead of these flags directly.
These are now private values which are only to be used to statically
initialize the tables.

llvm-svn: 45692

llvm-svn: 45691

flags that can be set.  Add predicates for the ones lacking it, and switch
some clients over to using the predicates instead of Flags directly.

llvm-svn: 45690

llvm-svn: 45689

Evan, please review the comments I added to getNumDefs to make sure
that they are accurate, thx.

llvm-svn: 45687