llvm-svn: 45432

llvm-svn: 45431

   operand type.
2. Move these create methods below the accessors.
3. Simplify all the MachineInstr::add* methods to use these.

llvm-svn: 45430

llvm-svn: 45429

llvm-svn: 45428

llvm-svn: 45425

llvm-svn: 45424

llvm-svn: 45423

llvm-svn: 45422

llvm-svn: 45421

llvm-svn: 45420

llvm-svn: 45419

llvm-svn: 45418

llvm-svn: 45416

llvm-svn: 45415

llvm-svn: 45414

discussion of this change.  Boy are my fingers tired. ;-)

llvm-svn: 45411

discussion of this change.

llvm-svn: 45409

llvm-svn: 45408

eliminating the llvm.x86.sse2.loadl.pd intrinsic?), one shuffle optzn
may be done (if shufps is better than pinsw, Evan, please review), and
we already know about LICM of simple instructions.

llvm-svn: 45407

llvm-svn: 45406

comparisons with a constant.  This allows us to compile isnan to:

_foo:
	fcmpu cr7, f1, f1
	mfcr r2
	rlwinm r3, r2, 0, 31, 31
	blr 

instead of:

LCPI1_0:					;  float
	.space	4
_foo:
	lis r2, ha16(LCPI1_0)
	lfs f0, lo16(LCPI1_0)(r2)
	fcmpu cr7, f1, f0
	mfcr r2
	rlwinm r3, r2, 0, 31, 31
	blr 

llvm-svn: 45405

llvm-svn: 45404

Disable null pointer folding transforms for non-generic address spaces. This should probably be a target-specific predicate based on address space. That way for targets where this isn't applicable the predicate can be optimized away.

llvm-svn: 45403

llvm-svn: 45402

as:

_bar:
	pushl	%esi
	subl	$8, %esp
	movl	16(%esp), %esi
	call	L_foo$stub
	fstps	(%esi)
	addl	$8, %esp
	popl	%esi
	#FP_REG_KILL
	ret

instead of:

_bar:
	pushl	%esi
	subl	$8, %esp
	movl	16(%esp), %esi
	call	L_foo$stub
	fstpl	(%esi)
	cvtsd2ss	(%esi), %xmm0
	movss	%xmm0, (%esi)
	addl	$8, %esp
	popl	%esi
	#FP_REG_KILL
	ret

llvm-svn: 45401

llvm-svn: 45400

if we are just going to store it back anyway.  This improves things 
like:
double foo();
void bar(double *P) { *P = foo(); }

llvm-svn: 45399

  x = load p
  store x -> p

llvm-svn: 45398

llvm-svn: 45397

llvm-svn: 45393

have potential side-effects.

llvm-svn: 45392

llvm-svn: 45391

Test -simplifycfg only.

llvm-svn: 45389

llvm-svn: 45388

llvm-svn: 45387

llvm-svn: 45386

Repair a transform that Chris noticed a bug in.  Thanks to Nicholas for pointing out my stupid mistakes when writing this patch. :-)

llvm-svn: 45384

define i32 @main() {
entry:
	%z = alloca i32		; <i32*> [#uses=2]
	store i32 0, i32* %z
	%tmp = load i32* %z		; <i32> [#uses=1]
	%sub = sub i32 %tmp, 1		; <i32> [#uses=1]
	%cmp = icmp ult i32 %sub, 0		; <i1> [#uses=1]
	%retval = select i1 %cmp, i32 1, i32 0		; <i32> [#uses=1]
	ret i32 %retval
}

into ret 1, instead of ret 0.

Christopher, please investigate.

llvm-svn: 45383

llvm-svn: 45377