code sequences.

llvm-svn: 22719

llvm-svn: 22718

opts than they take directly.  Thanks to John C for pointing this problem
out to me!

llvm-svn: 22717

Patch by Jim Laskey.

llvm-svn: 22716

Patch by Jim Laskey!

llvm-svn: 22715

way.  This allows ORI/ORIS pairs, for example.

llvm-svn: 22714

Includes wider support for rotate and mask cases.

Patch by Jim Laskey.

I've requested that Jim add new regression tests the newly handled cases.

llvm-svn: 22712

Includes support for 32-bit constants using addi/addis.

Patch by Jim Laskey.

llvm-svn: 22711

Patch by Jim Laskey

llvm-svn: 22710

Patch by Jim Laskey

llvm-svn: 22709

(lowercase isXXX).

Patch by Jim Laskey.

llvm-svn: 22708

llvm-svn: 22707

easier to understand?  :)

llvm-svn: 22706

'opt x y').  This fixes PR493.

Patch contributed by Owen Anderson!

llvm-svn: 22705

llvm-svn: 22704

llvm-svn: 22703

rewriter for all code inserted into the preheader, which is never flushed.

llvm-svn: 22702

This testcase checks that only one mul is present in the output code, as it
should be.

llvm-svn: 22701

llvm-svn: 22700

The termination condition actually wants to use the post-incremented value
of the loop, not a new indvar with an unusual base.

On PPC, for example, this allows us to compile
LoopStrengthReduce/exit_compare_live_range.ll to:

_foo:
        li r2, 0
.LBB_foo_1:     ; no_exit
        li r5, 0
        stw r5, 0(r3)
        addi r2, r2, 1
        cmpw cr0, r2, r4
        bne .LBB_foo_1  ; no_exit
        blr

instead of:

_foo:
        li r2, 1                ;; IV starts at 1, not 0
.LBB_foo_1:     ; no_exit
        li r5, 0
        stw r5, 0(r3)
        addi r5, r2, 1
        cmpw cr0, r2, r4
        or r2, r5, r5           ;; Reg-reg copy, extra live range
        bne .LBB_foo_1  ; no_exit
        blr

This implements LoopStrengthReduce/exit_compare_live_range.ll

llvm-svn: 22699

llvm-svn: 22698

llvm-svn: 22697

llvm-svn: 22696

llvm-svn: 22694

isHighOnes, where it would consider 0 to have high ones.

llvm-svn: 22693

llvm-svn: 22692

llvm-svn: 22691

* Teach this code to move allocas out of the loop when tail call eliminating
  a call marked 'tail'.  This implements TailCallElim/move_alloca_for_tail_call.ll
* Do not perform this transformation if a call is marked 'tail' and if there
  are allocas that we cannot move out of the loop in #2.  Doing so would increase
  the stack usage of the function.  This implements fixes
  PR615 and TailCallElim/dont-tce-tail-marked-call.ll.

llvm-svn: 22690

llvm-svn: 22689

depending on the command line option.  Now the command line option just
sets the subtarget as appropriate.  G5 opts will now default to on on
G5-enabled nightly testers among other machines.

llvm-svn: 22688

llvm-svn: 22687

to pass it in.  Also, since it always returns a non-null pointer, make it
return a reference instead for easier use.

llvm-svn: 22686

is available, since the target triple doesn't specify whether to use gpopts
or not.

llvm-svn: 22685

llvm-svn: 22683

llvm-svn: 22682

llvm-svn: 22681

avoid revisiting nodes more than once.  This eliminates a source of
potentially exponential behavior.  For a small function in 191.fma3d
(hexah_stress_divergence_), this speeds up isel from taking > 20mins to
taking 0.07s.

llvm-svn: 22680

llvm-svn: 22679

yesterday.  This fixes whetstone and a bunch of programs in the External tests.

llvm-svn: 22678

a subtarget.

llvm-svn: 22677