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Commit Graph

20 Commits

Author SHA1 Message Date
Evan Cheng
5242b6aaa1 Disable expensive two-address optimizations at -O0. rdar://10453055
llvm-svn: 144806
2011-11-16 18:44:48 +00:00
Bill Wendling
aca68bbe94 Update more tests to the new EH scheme.
llvm-svn: 138903
2011-08-31 21:39:05 +00:00
Chris Lattner
3ae8704c4f add missing colon, thanks peter.
llvm-svn: 137306
2011-08-11 16:15:10 +00:00
Chris Lattner
575057916a fix PR10605 / rdar://9930964 by adding a pretty scary missed check.
It's somewhat surprising anything works without this.  Before we would
compile the testcase into:

test:                                   # @test
	movl	$4, 8(%rdi)
	movl	8(%rdi), %eax
	orl	%esi, %eax
	cmpl	$32, %edx
	movl	%eax, -4(%rsp)          # 4-byte Spill
	je	.LBB0_2

now we produce:

test:                                   # @test
	movl	8(%rdi), %eax
	movl	$4, 8(%rdi)
	orl	%esi, %eax
	cmpl	$32, %edx
	movl	%eax, -4(%rsp)          # 4-byte Spill
	je	.LBB0_2
llvm-svn: 137303
2011-08-11 06:26:54 +00:00
Jakob Stoklund Olesen
2cac2ea7a1 Be less aggressive about hinting in RAFast.
In particular, don't spill dirty registers only to satisfy a hint. It is
not worth it.

The attached test case provides an example where the fast allocator
would spill a register when other registers are available.

llvm-svn: 132900
2011-06-13 03:26:46 +00:00
Bill Wendling
0b9c16295a As Dan pointed out, movzbl, movsbl, and friends are nicer than their alias
(movzx/movsx) because they give more information. Revert that part of the patch.

llvm-svn: 129498
2011-04-14 01:46:37 +00:00
Bill Wendling
d49591cf21 Have the X86 back-end emit the alias instead of what's being aliased. In most
cases, it's much nicer and more informative reading the alias.

llvm-svn: 129497
2011-04-14 01:11:51 +00:00
Dan Gohman
a83323bca5 Fix fast-isel address mode folding to avoid folding instructions
outside of the current basic block. This fixes PR9500, rdar://9156159.

llvm-svn: 128041
2011-03-22 00:04:35 +00:00
NAKAMURA Takumi
8e8c80a516 Relax expressions and add explicit triplets -linux and -win32.
llvm-svn: 126202
2011-02-22 07:20:02 +00:00
Chris Lattner
c4d1d86d3e reapply my fix for PR8961 with a tweak to properly handle
multi-instruction sequences like calls.  Many thanks to Jakob for
finding a testcase.

llvm-svn: 123559
2011-01-16 02:27:38 +00:00
Chris Lattner
eba719204c revert my fastisel patch again which apparently still gives the
llvm-gcc-i386-linux-selfhost buildbot heartburn...

llvm-svn: 123431
2011-01-14 06:14:33 +00:00
Chris Lattner
ee950eeb24 reapply r123414 now that the botz are calmed down and the fix is already in.
llvm-svn: 123427
2011-01-14 04:24:28 +00:00
Chris Lattner
349735530b r123414 broke llvm-gcc bootstrap apparently, revert
llvm-svn: 123422
2011-01-14 02:07:32 +00:00
Chris Lattner
5baec05809 fix PR8961 - a fast isel miscompilation where we'd insert a new instruction
after sext's generated for addressing that got folded.  Previously we compiled
test5 into:

_test5:                                 ## @test5
## BB#0:
        movq    -8(%rsp), %rax          ## 8-byte Reload
        movq    (%rdi,%rax), %rdi
        addq    %rdx, %rdi
        movslq  %esi, %rax
        movq    %rax, -8(%rsp)          ## 8-byte Spill
        movq    %rdi, %rax
        ret

which is insane and wrong.  Now we produce:

_test5:                                 ## @test5
## BB#0:
	movslq	%esi, %rax
	movq	(%rdi,%rax), %rax
	addq	%rdx, %rax
	ret

llvm-svn: 123414
2011-01-14 00:01:01 +00:00
Dan Gohman
5e485c833f Use the source-order scheduler instead of the "fast" scheduler at -O0,
because it's more likely to keep debug line information in its original
order.

llvm-svn: 108496
2010-07-16 02:01:19 +00:00
Dan Gohman
4dcc56a102 Revert 107840 107839 107813 107804 107800 107797 107791.
Debug info intrinsics win for now.

llvm-svn: 107850
2010-07-08 01:00:56 +00:00
Dan Gohman
424cc6b616 Add X86FastISel support for return statements. This entails refactoring
a bunch of stuff, to allow the target-independent calling convention
logic to be employed.

llvm-svn: 107800
2010-07-07 18:32:53 +00:00
Dan Gohman
243bda093e Teach X86FastISel to fold constant offsets and scaled indices in
the same address.

llvm-svn: 107373
2010-07-01 02:27:15 +00:00
Chris Lattner
0f1da52ad1 fix PR4984 by ensuring that fastisel adds properly sign extended GEP displacement
values to machineinstrs.

llvm-svn: 81886
2009-09-15 18:27:02 +00:00
Chris Lattner
1eac807a0b rename test
llvm-svn: 81884
2009-09-15 18:23:37 +00:00