Patch contributed by Evan Cheng!

llvm-svn: 24382

by Evan Cheng!

llvm-svn: 24371

contributed by Evan Cheng.

llvm-svn: 24358

Add a new option to indicate we want the code generator to emit code quickly,not spending tons of time microoptimizing it.  This is useful for an -O0style of build.

llvm-svn: 24233

llvm-svn: 23898

llvm-svn: 23897

Add a new flag to TargetLowering indicating if the target has really cheap
  signed division by powers of two, make ppc use it.  This will probably go
  away in the future.
Implement some more ISD::SDIV folds in the dag combiner
Remove now dead code in the x86 backend.

llvm-svn: 23853

llvm-svn: 23754

fixing a bunch of nasty hackery

llvm-svn: 23735

llvm-svn: 23594

llvm-svn: 23557

llvm-svn: 23537

Though I have done extensive testing, it is possible that this will break
things in configs I can't test.  Please let me know if this causes a problem
and I'll fix it ASAP.

llvm-svn: 23505

llvm-svn: 23387

llvm-svn: 23356

llvm-svn: 23347

llvm-svn: 23332

llvm-svn: 23202

1. Use SubtargetFeatures in llc/lli.

2. Propagate feature "string" to all targets.

3. Implement use of SubtargetFeatures in PowerPCTargetSubtarget.

llvm-svn: 23192

llvm-svn: 23119

llvm-svn: 23082

putting it into the constant pool.  This allows the isel machinery to
create constants that it will end up deciding are not needed, without them
ending up in the resultant function constant pool.

llvm-svn: 23081

llvm-svn: 23031

llvm-svn: 22991

llvm-svn: 22988

llvm-svn: 22929

llvm-svn: 22925

llvm-svn: 22914

llvm-svn: 22891

Give a whole bunch of other stuff variable operands, particularly FP.  The
FP stackifier is playing fast and loose with operands here, so we have to
mark them all as variable.  This will have to be fixed before we can dag->dag
the X86 backend.  The solution is for the pre-stackifier and post-stackifier
instructions to all be disjoint.

llvm-svn: 22890

llvm-svn: 22888

only take one operand.  The other comes implicitly in through CL.

llvm-svn: 22887

passed.

llvm-svn: 22886

llvm-svn: 22807

fixme from the PowerPC backend.  Emit slightly better code for legalizing
select_cc.

llvm-svn: 22805

block.  nur.

llvm-svn: 22788

now generate the relatively good code sequences:
unsigned short foo(float a) { return a; }
_foo:
        movss 4(%esp), %xmm0
        cvttss2si %xmm0, %eax
        movzwl %ax, %eax
        ret

and
unsigned bar(float a) { return a; }
_bar:
        movss .CPI_bar_0, %xmm0
        movss 4(%esp), %xmm1
        movapd %xmm1, %xmm2
        subss %xmm0, %xmm2
        cvttss2si %xmm2, %eax
        xorl $-2147483648, %eax
        cvttss2si %xmm1, %ecx
        ucomiss %xmm0, %xmm1
        cmovb %ecx, %eax
        ret

llvm-svn: 22786

llvm-svn: 22729

llvm-svn: 22687

llvm-svn: 22644