1) nuke ConstDataCoalSection, which is dead.
2) revise my previous patch for rdar://8018335,
  which was completely wrong.  Specifically, it doesn't 
  make sense to mark __TEXT,__const_coal as PURE_INSTRUCTIONS,
  because it is for readonly data.  templates (it turns out)
  go to const_coal_nt.  The real fix for rdar://8018335 was
  to give ConstTextCoalSection a section kind of ReadOnly 
  instead of Text.

llvm-svn: 112496

llvm-svn: 112463

said (physical) register.

llvm-svn: 112461

llvm-svn: 112459

instead of PromoteMemToReg.  This allows it to stop using DF and DT,
eliminating a computation of DT and DF from clang -O3.  Clang is now
down to 2 runs of DomFrontier.

llvm-svn: 112457

llvm-svn: 112455

being actively maintained, improved, or extended.

llvm-svn: 112356

llvm-svn: 112354

doesn't currently support dealing with this.

llvm-svn: 112341

llvm-svn: 112340

llvm-svn: 112305

llvm-svn: 112287

llvm-svn: 112242

to try to re-use scavenged frame index reference registers. rdar://8277890

llvm-svn: 112241

llvm-svn: 112238

virtual base registers handle this function, and more. A bit more cleanup
to do on the interface to eliminateFrameIndex() after this.

llvm-svn: 112237

llvm-svn: 112216

llvm-svn: 112215

llvm-svn: 112213

Donot forget to resolve dangling debug info in a case where virtual register, used for a value, is initialized after a dbg intrinsic is seen.

llvm-svn: 112207

llvm-svn: 112175

llvm-svn: 112171

llvm-svn: 112155

llvm-svn: 112104

expanding: e.g. <2 x float> -> <4 x float> instead of -> 2 floats.  This
affects two places in the code: handling cross block values and handling
function return and arguments.  Since vectors are already widened by 
legalizetypes, this gives us much better code and unblocks x86-64 abi
and SPU abi work.

For example, this (which is a silly example of a cross-block value):
define <4 x float> @test2(<4 x float> %A) nounwind {
 %B = shufflevector <4 x float> %A, <4 x float> undef, <2 x i32> <i32 0, i32 1>
 %C = fadd <2 x float> %B, %B
  br label %BB
BB:
 %D = fadd <2 x float> %C, %C
 %E = shufflevector <2 x float> %D, <2 x float> undef, <4 x i32> <i32 0, i32 1, i32 undef, i32 undef>
 ret <4 x float> %E
}

Now compiles into:

_test2:                                 ## @test2
## BB#0:
 addps %xmm0, %xmm0
 addps %xmm0, %xmm0
 ret

previously it compiled into:

_test2:                                 ## @test2
## BB#0:
 addps %xmm0, %xmm0
 pshufd $1, %xmm0, %xmm1
                                        ## kill: XMM0<def> XMM0<kill> XMM0<def>
 insertps $0, %xmm0, %xmm0
 insertps $16, %xmm1, %xmm0
 addps %xmm0, %xmm0
 ret

This implements rdar://8230384

llvm-svn: 112101

llvm-svn: 112086

llvm-svn: 112085

llvm-svn: 112084

no functionality change.

llvm-svn: 111994

functionality change.

llvm-svn: 111990

llvm-svn: 111982

access. rdar://8277890&7352504

llvm-svn: 111968

For now it's still a command line option, but the interface to the generic
code doesn't need to know that.

llvm-svn: 111942

llvm-svn: 111870

llvm-svn: 111847

relative offsets when there are offsets encoded in the instructions and
simplifies final allocation in PEI. rdar://8277890

llvm-svn: 111836

PR 7920.

llvm-svn: 111820

Now that PassInfo and Pass::ID have been separated, move the rest of the passes over to the new registration API.

llvm-svn: 111815

hierarchy with virtual methods and using llvm_unreachable to properly indicate
unreachable states which would otherwise leave variables uninitialized.

llvm-svn: 111803

llvm-svn: 111744