~40% faster vector shl <4 x i32> on SSE 4.1  Larger improvements for smaller types coming in future patches.

For:

define <2 x i64> @shl(<4 x i32> %r, <4 x i32> %a) nounwind readnone ssp {
entry:
  %shl = shl <4 x i32> %r, %a                     ; <<4 x i32>> [#uses=1]
  %tmp2 = bitcast <4 x i32> %shl to <2 x i64>     ; <<2 x i64>> [#uses=1]
  ret <2 x i64> %tmp2
}

We get:

_shl:                                   ## @shl
	pslld	$23, %xmm1
	paddd	LCPI0_0, %xmm1
	cvttps2dq	%xmm1, %xmm1
	pmulld	%xmm1, %xmm0
	ret

Instead of:

_shl:                                   ## @shl
	pshufd	$3, %xmm0, %xmm2
	movd	%xmm2, %eax
	pshufd	$3, %xmm1, %xmm2
	movd	%xmm2, %ecx
	shll	%cl, %eax
	movd	%eax, %xmm2
	pshufd	$1, %xmm0, %xmm3
	movd	%xmm3, %eax
	pshufd	$1, %xmm1, %xmm3
	movd	%xmm3, %ecx
	shll	%cl, %eax
	movd	%eax, %xmm3
	punpckldq	%xmm2, %xmm3
	movd	%xmm0, %eax
	movd	%xmm1, %ecx
	shll	%cl, %eax
	movd	%eax, %xmm2
	movhlps	%xmm0, %xmm0
	movd	%xmm0, %eax
	movhlps	%xmm1, %xmm1
	movd	%xmm1, %ecx
	shll	%cl, %eax
	movd	%eax, %xmm0
	punpckldq	%xmm0, %xmm2
	movdqa	%xmm2, %xmm0
	punpckldq	%xmm3, %xmm0
	ret

llvm-svn: 109549

llvm-svn: 109548

recommit simplification (originally r109504, backed out in r109508) now that problem in CallSiteBase is fixed

llvm-svn: 109547

DeclIsRequiredFunctionOrFileScopedVar.

This function is part of the public CodeGen interface since it's essentially a CodeGen predicate that is also
needed by the PCH mechanism to determine whether a decl needs to be deserialized during PCH loading for codegen purposes.
This fixes current (and avoids future) codegen-from-PCH bugs.

llvm-svn: 109546

llvm-svn: 109545

left two new asserts commented out, because they would fire in clang, have to hunt those down first

llvm-svn: 109544

Right now we mock up the function as a variadic
function when generating the IR for the call; we need
to eventually make the function be the right type if
the type is available.

llvm-svn: 109543

llvm-svn: 109540

llvm-svn: 109539

llvm-svn: 109538

llvm-svn: 109537

llvm-svn: 109535

llvm-svn: 109534

llvm-svn: 109532

should be taken out and shot.

llvm-svn: 109531

llvm-svn: 109530

Finesse 'idempotent operations' analyzer issues to include the opcode of the binary operator for clearer error reporting.  Also remove the 'Idempotent operation' prefix in messages; it's redundant since the bug type is the same.

llvm-svn: 109527

llvm-svn: 109526

llvm-svn: 109525

Update the list of lexical decls in the TU for chained PCHs. This makes -ast-print show the decls from the dependent PCH.

llvm-svn: 109524

llvm-svn: 109521

recursively and returning a SCALAR_TO_VECTOR node, but assuming the input was always a BUILD_VECTOR.

llvm-svn: 109519

llvm-svn: 109517

llvm-svn: 109513

llvm-svn: 109512

llvm-svn: 109511

llvm-svn: 109510

llvm-svn: 109509

llvm-svn: 109508

llvm-svn: 109507

llvm-svn: 109506

llvm-svn: 109505

llvm-svn: 109504

llvm-svn: 109503

llvm-svn: 109502

Fixes http://llvm.org/PR7692

llvm-svn: 109501

llvm-svn: 109500

Also fix some comments.

llvm-svn: 109499

Change it back again: destructors and constructors need to be run.

llvm-svn: 109498

This fixes the MC/COFF/basic-coff.ll test case.

llvm-svn: 109497