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96908b17ae
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2447 Commits

Author SHA1 Message Date
Chris Lattner
96908b17ae generalize the previous check to handle -1 on either side of the 
select, inserting a not to compensate.  Add a missing isZero check
that I lost somehow.

This improves codegen of:

void *func(long count) {
      return new int[count];
}

from:

__Z4funcl:                              ## @_Z4funcl
	movl	$4, %ecx                ## encoding: [0xb9,0x04,0x00,0x00,0x00]
	movq	%rdi, %rax              ## encoding: [0x48,0x89,0xf8]
	mulq	%rcx                    ## encoding: [0x48,0xf7,0xe1]
	testq	%rdx, %rdx              ## encoding: [0x48,0x85,0xd2]
	movq	$-1, %rdi               ## encoding: [0x48,0xc7,0xc7,0xff,0xff,0xff,0xff]
	cmoveq	%rax, %rdi              ## encoding: [0x48,0x0f,0x44,0xf8]
	jmp	__Znam                  ## TAILCALL
                                        ## encoding: [0xeb,A]

to:

__Z4funcl:                              ## @_Z4funcl
	movl	$4, %ecx                ## encoding: [0xb9,0x04,0x00,0x00,0x00]
	movq	%rdi, %rax              ## encoding: [0x48,0x89,0xf8]
	mulq	%rcx                    ## encoding: [0x48,0xf7,0xe1]
	cmpq	$1, %rdx                ## encoding: [0x48,0x83,0xfa,0x01]
	sbbq	%rdi, %rdi              ## encoding: [0x48,0x19,0xff]
	notq	%rdi                    ## encoding: [0x48,0xf7,0xd7]
	orq	%rax, %rdi              ## encoding: [0x48,0x09,0xc7]
	jmp	__Znam                  ## TAILCALL
                                        ## encoding: [0xeb,A]



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120932 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-05 02:00:51 +00:00
Chris Lattner
c8c20d1486 relax this to handle linux defaulting to -static. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120930 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-05 01:31:13 +00:00
Chris Lattner
a2b5600e61 Improve an integer select optimization in two ways: 
1. generalize 
    (select (x == 0), -1, 0) -> (sign_bit (x - 1))
to:
    (select (x == 0), -1, y) -> (sign_bit (x - 1)) | y

2. Handle the identical pattern that happens with !=:
   (select (x != 0), y, -1) -> (sign_bit (x - 1)) | y

cmov is often high latency and can't fold immediates or
memory operands.  For example for (x == 0) ? -1 : 1, before 
we got:

< 	testb	%sil, %sil
< 	movl	$-1, %ecx
< 	movl	$1, %eax
< 	cmovel	%ecx, %eax

now we get:

> 	cmpb	$1, %sil
> 	sbbl	%eax, %eax
> 	orl	$1, %eax




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120929 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-05 01:23:24 +00:00
Chris Lattner
bced6a1b8f merge some tests into select.ll and make them more specific. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120928 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-05 01:13:58 +00:00
Chris Lattner
bbdabf411b rename test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120927 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-05 01:02:23 +00:00
Chris Lattner
63d7c17ff1 remove two tests that aren't really testing anything. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120926 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-05 01:02:13 +00:00
Benjamin Kramer
1292c22645 Add patterns for the x86 popcnt instruction. 
- Also adds a new POPCNT subtarget feature that is currently enabled if the target
  supports SSE4.2 (nehalem) or SSE4A (barcelona).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120917 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-04 20:32:23 +00:00
Devang Patel
3fda44f276 Hide tests, that check .loc, .file in output assembly, from darwin9 buildbot. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120750 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-02 23:29:58 +00:00
Devang Patel
ee4854faf3 Use set directive for StartMinusEndExpr. 
This is a fix for llvm-gcc-i386-darwin9 buildbot failure.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120742 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-02 21:32:30 +00:00
Evan Cheng
fabdafbacb Fix test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120730 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-02 20:17:34 +00:00
Evan Cheng
1bf891ae6e Fix and re-enable tail call optimization of expanded libcalls. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120622 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-01 22:59:46 +00:00
Evan Cheng
28cd48fffb Speculatively disable x86 portion of r120501 to appease the x86_64 buildbot. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120549 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-12-01 03:27:20 +00:00
Evan Cheng
3d2125c9db Enable sibling call optimization of libcalls which are expanded during 
legalization time. Since at legalization time there is no mapping from
SDNode back to the corresponding LLVM instruction and the return
SDNode is target specific, this requires a target hook to check for
eligibility. Only x86 and ARM support this form of sibcall optimization
right now.
rdar://8707777


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120501 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-30 23:55:39 +00:00
Eric Christopher
c459d06ae6 Not all platforms use _<func>. Duh. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120418 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-30 09:23:54 +00:00
Eric Christopher
228232b282 Rewrite mwait and monitor support and custom lower arguments. 
Fixes PR8573.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120404 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-30 07:20:12 +00:00
Benjamin Kramer
8ad87ab166 Fix some broken CHECK lines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120332 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-29 22:34:55 +00:00
Rafael Espindola
5bf7c534cf Lower TLS_addr32 and TLS_addr64. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120225 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-27 20:43:02 +00:00
Benjamin Kramer
ce750f0332 Implement the "if (X == 6 || X == 4)" -> "if ((X|2) == 6)" optimization. 
This currently only catches the most basic case, a two-case switch, but can be
extended later.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119964 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-22 09:45:38 +00:00
Dale Johannesen
76eb5f2401 Prefetch has a MemOperand now. FileCheckize a test. 
This finishes up 8460971.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119848 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-19 21:49:38 +00:00
Mon P Wang
cab98e3168 Make isScalarToVector to return false if the node is a scalar. This will prevent 
DAGCombine from making an illegal transformation of bitcast of a scalar to a
vector into a scalar_to_vector.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119819 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-19 19:08:12 +00:00
Duncan Sands
dcfd3a798f The DAGCombiner was threading select over pairs of extending loads even 
if the extension types were not the same.  The result was that if you
fed a select with sext and zext loads, as in the testcase, then it
would get turned into a zext (or sext) of the select, which is wrong
in the cases when it should have been an sext (resp. zext).  Reported
and diagnosed by Sebastien Deldon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119728 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-18 20:05:18 +00:00
Rafael Espindola
5c0556341e Change CodeGen to use .loc directives. This produces a lot more readable output 
and testing is easier.  A good example is the unknown-location.ll test that
now can just look for ".loc 1 0 0".  We also don't use a DW_LNE_set_address for
every address change anymore.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119613 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-18 02:04:25 +00:00
Dale Johannesen
b4ac2858da Do not throw away alignment when generating the DAG for 
memset; we may need it to decide between MOVAPS and MOVUPS
later.  Adjust a test that was looking for wrong code.
PR 3866 / 8675131.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119605 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-18 01:35:23 +00:00
John Thompson
d3b809d476 Fixed to use input redirection for source - to eliminate .s output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119599 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-18 00:50:20 +00:00
John Thompson
7730318000 Bug 8621 fix - pointer cast stripped from inline asm constraint argument. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119590 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-17 23:58:47 +00:00
Peter Collingbourne
948cf0289f Recognise 32-bit ror-based bswap implementation used by uclibc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119007 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-13 19:54:30 +00:00
Dan Gohman
efb8a9d0c2 Remove the memmove->memcpy optimization from CodeGen. MemCpyOpt does this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118789 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-11 16:24:49 +00:00
Duncan Sands
68c39552a5 Testcase for PR8211 (llc crash at -O0). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118509 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-09 16:22:27 +00:00
Dan Gohman
6a559cd695 Fix DAGCombiner to avoid folding a sext-in-reg or similar through a shl 
in order to fold it into a load.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118471 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-09 01:54:35 +00:00
Dan Gohman
be7c5116a7 Delete an extraneous svn:executable property. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118470 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-09 01:51:06 +00:00
Dale Johannesen
71365d3774 Fix an inline asm pasto from 117667; was preventing 
{i64, i64} from matching i128.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118465 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-09 01:15:07 +00:00
Chris Lattner
db28788e4a go to great lengths to work around a GAS bug my previous patch 
exposed:

GAS doesn't accept "fcomip %st(1)", it requires "fcomip %st(1), %st(0)"
even though st(0) is implicit in all other fp stack instructions.

Fortunately, there is an alias for fcomip named "fcompi" and gas does
accept the default argument for the alias (boggle!).

As such, switch the canonical form of this instruction to "pi" instead
of "ip".  This makes the code generator and disassembler generate pi,
avoiding the gas bug.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118356 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-06 21:37:06 +00:00
Dale Johannesen
d5ce456161 This test assumes SSE is present; that is not the default 
on non-X86 hosts.  Hopefully fixes ppc-host buildbot.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118182 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-03 18:08:41 +00:00
Dan Gohman
394d6298bc Fix DAGCombiner to avoid going into an infinite loop when it 
encounters (and:i64 (shl:i64 (load:i64), 1), 0xffffffff).
This fixes rdar://8606584.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118143 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-03 01:47:46 +00:00
John Thompson
45c21ff044 Inline asm mult-alt constraint tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118107 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-02 23:01:44 +00:00
Devang Patel
a90b305af9 Use frameindex, if available, as a last resort to emit debug info for a parameter. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118020 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-11-02 17:01:30 +00:00
Dale Johannesen
e49406fd63 Fix pastos in handling of AVX cvttsd2si, PR8491. 
Bruno, please review, but I'm pretty sure this is right.
Patch by Alex Mac!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117514 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-28 00:35:54 +00:00
Dale Johannesen
d155d7e428 An stdcall function calling a non-stdcall function 
cannot use tailcall.  PR 8461.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117322 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-25 22:17:05 +00:00
Michael J. Spencer
c527407010 X86: Emit _fltused instead of __fltused on Windows x64. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117205 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-23 09:06:59 +00:00
Evan Cheng
134982daa9 More accurate estimate / tracking of register pressure. 
- Initial register pressure in the loop should be all the live defs into the
  loop. Not just those from loop preheader which is often empty.
- When an instruction is hoisted, update register pressure from loop preheader
  to the original BB.
- Treat only use of a virtual register as kill since the code is still SSA.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116956 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-20 22:03:58 +00:00
Evan Cheng
2312842de0 Re-enable register pressure aware machine licm with fixes. Hoist() may have 
erased the instruction during LICM so UpdateRegPressureAfter() should not
reference it afterwards.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116845 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-19 18:58:51 +00:00
Daniel Dunbar
9869413802 Revert r116781 "- Add a hook for target to determine whether an instruction def 
is", which breaks some nightly tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116816 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-19 17:14:24 +00:00
Evan Cheng
11e8b74a7a - Add a hook for target to determine whether an instruction def is 
"long latency" enough to hoist even if it may increase spilling. Reloading
  a value from spill slot is often cheaper than performing an expensive
  computation in the loop. For X86, that means machine LICM will hoist
  SQRT, DIV, etc. ARM will be somewhat aggressive with VFP and NEON
  instructions.
- Enable register pressure aware machine LICM by default.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116781 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-19 00:55:07 +00:00
Michael J. Spencer
84ac4d5a2a X86-Windows: Emit an undefined global __fltused symbol when targeting Windows 
if any floating point arguments are passed to an external function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116665 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-16 08:25:41 +00:00
Rafael Espindola
6d8628061b Fix another case where we were preferring instructions with large 
immediates instead of 8 bits ones.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116410 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-13 17:14:25 +00:00
Rafael Espindola
dba81cf40e Fix PR8365 by adding a more specialized Pat that checks if an 'and' with 
8 bit constants can be used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116403 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-13 13:31:20 +00:00
Eric Christopher
8f9145b0eb FileCheckize this in a hope to quiet a valgrind warning on grep. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116376 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-12 23:47:58 +00:00
Andrew Trick
0a434dbb91 PR8297 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116223 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-11 21:08:42 +00:00
Andrew Trick
1a2cf3b4d9 Fixes bug 8297: i386 cmpxchg8b, missing MachineMemOperand 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116214 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-11 19:02:04 +00:00
Michael J. Spencer
92bf38c956 X86: MinGW should always use libgcc on Windows. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116177 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-10 23:11:06 +00:00