EXTRACT_SUBREG no longer appears as a machine instruction. Use COPY instead.

Add isCopy() checks in many places using isMoveInstr() and isExtractSubreg().
The isMoveInstr hook will be removed later.

llvm-svn: 107879

Fix X86InstrInfo::convertToThreeAddressWithLEA to generate COPY instead of
INSERT_SUBREG.

llvm-svn: 107878

llvm-svn: 107868

(X >s -1) ? C1 : C2 and (X <s  0) ? C2 : C1
into ((X >>s 31) & (C2 - C1)) + C1, avoiding the conditional.

This optimization could be extended to take non-const C1 and C2 but we better
stay conservative to avoid code size bloat for now.

for
int sel(int n) {
     return n >= 0 ? 60 : 100;
}

we now generate
  sarl  $31, %edi
  andl  $40, %edi
  leal  60(%rdi), %eax

instead of
  testl %edi, %edi
  movl  $60, %ecx
  movl  $100, %eax
  cmovnsl %ecx, %eax

llvm-svn: 107866

correct the testcase for valid assembly.

Needs more tests.

llvm-svn: 107860

llvm-svn: 107856

This target hook is intended to replace copyRegToReg entirely, but for now it
calls copyRegToReg.

Any remaining calls to copyRegToReg wil be replaced by COPY instructions.

llvm-svn: 107854

Optimize some vfp comparisons to integer ones. This patch implements the simplest case when the following conditions are met:
1. The arguments are f32.
2. The arguments are loads and they have no uses other than the comparison.
3. The comparison code is EQ or NE.

e.g.
        vldr.32 s0, [r1]
        vldr.32 s1, [r0]
        vcmpe.f32       s1, s0
        vmrs    apsr_nzcv, fpscr
	beq     LBB0_2
=>
        ldr     r1, [r1]
        ldr     r0, [r0]
        cmp     r0, r1
        beq     LBB0_2

More complicated cases will be implemented in subsequent patches.

llvm-svn: 107852

Add explicit testcases for tail calls within the same module.
Duplicate some code to humor those who think .w doesn't apply on ARM.
Leave this disabled on Thumb1, and add some comments explaining why it's hard
and won't gain much.

llvm-svn: 107851

Debug info intrinsics win for now.

llvm-svn: 107850

(if there are any) and use the one which remains available for the longest
rather than just using the first one. This should help enable better re-use
of the loaded frame index values. rdar://7318760

llvm-svn: 107847

address spaces when SRoA'ing memcpy's.

llvm-svn: 107846

prefer to materialize as local constants. This fixes the clang
bootstrap abort.

llvm-svn: 107840

llvm-svn: 107839

PR7399.  The asm parser already handles this.  This is of dubious 
utility (see the PR) but the asmprinter was clearly broken here.

llvm-svn: 107834

llvm-svn: 107832

llvm-svn: 107831

address calculation instructions leading up to a jump table when we're trying
to convert them into a TB[H] instruction in Thumb2. This realistically
shouldn't happen much, if at all, for well formed inputs, but it's more correct
to handle it. rdar://7387682

llvm-svn: 107830

llvm-svn: 107826

in the integrated assembler.  Still some discussion to be
done.

llvm-svn: 107825

llvm-svn: 107823

Keep track of abstract subprogram DIEs. 

llvm-svn: 107822

llvm-svn: 107820

llvm-svn: 107818

didn't create a new block, don't reset the insert position.

llvm-svn: 107813

llvm-svn: 107811

llvm-svn: 107810

This fixes PR7540.

llvm-svn: 107809

llvm-svn: 107807

a separate DCE pass over MachineInstrs.

llvm-svn: 107804

a bunch of stuff, to allow the target-independent calling convention
logic to be employed.

llvm-svn: 107800

llvm-svn: 107798

position when emitting multiple blocks when executing a custom
inserter.

llvm-svn: 107797

llvm-svn: 107796

llvm-svn: 107795

around everywhere, and also give it an InsertPt member, to enable isel
to operate at an arbitrary position within a block, rather than just
appending to a block.

llvm-svn: 107791

instance, rather than pointers to all of FunctionLoweringInfo's
members.

This eliminates an NDEBUG ABI sensitivity.

llvm-svn: 107789

allow target-specific fast-isel code to make use of it directly.

llvm-svn: 107787

code can do calling-convention queries. This obviates OutputArgReg.

llvm-svn: 107786

llvm-svn: 107785