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16 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
5e5ed44577 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132900 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-06-13 03:26:46 +00:00
Bill Wendling
d336de318e 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129498 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-14 01:46:37 +00:00
Bill Wendling
c6df9883da 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129497 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-14 01:11:51 +00:00
Dan Gohman
b55d6b6a7e Fix fast-isel address mode folding to avoid folding instructions 
outside of the current basic block. This fixes PR9500, rdar://9156159.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128041 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-03-22 00:04:35 +00:00
NAKAMURA Takumi
64779f4b87 Relax expressions and add explicit triplets -linux and -win32. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126202 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-02-22 07:20:02 +00:00
Chris Lattner
b99fdee325 reapply my fix for PR8961 with a tweak to properly handle 
multi-instruction sequences like calls.  Many thanks to Jakob for
finding a testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123559 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-16 02:27:38 +00:00
Chris Lattner
d357e88740 revert my fastisel patch again which apparently still gives the 
llvm-gcc-i386-linux-selfhost buildbot heartburn...


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123431 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-14 06:14:33 +00:00
Chris Lattner
9e27cc8049 reapply r123414 now that the botz are calmed down and the fix is already in. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123427 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-14 04:24:28 +00:00
Chris Lattner
a899d1c264 r123414 broke llvm-gcc bootstrap apparently, revert 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123422 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-14 02:07:32 +00:00
Chris Lattner
d754041493 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



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123414 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-01-14 00:01:01 +00:00
Dan Gohman
e667e01723 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108496 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-16 02:01:19 +00:00
Dan Gohman
f595141525 Revert 107840 107839 107813 107804 107800 107797 107791. 
Debug info intrinsics win for now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107850 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-08 01:00:56 +00:00
Dan Gohman
f423a69839 Add X86FastISel support for return statements. This entails refactoring 
a bunch of stuff, to allow the target-independent calling convention
logic to be employed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107800 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-07 18:32:53 +00:00
Dan Gohman
5c87bf64d6 Teach X86FastISel to fold constant offsets and scaled indices in 
the same address.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107373 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-01 02:27:15 +00:00
Chris Lattner
dffb6e5aee fix PR4984 by ensuring that fastisel adds properly sign extended GEP displacement 
values to machineinstrs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81886 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-15 18:27:02 +00:00
Chris Lattner
371b8fc41c rename test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81884 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-15 18:23:37 +00:00