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2263 Commits

Author SHA1 Message Date
Chris Lattner
378faeecc8 when legalizing extremely wide shifts, make sure that 
the shift amounts are in a suitably wide type so that
we don't generate out of range constant shift amounts.

This fixes PR9028.

llvm-svn: 125458
 2011-02-13 09:10:56 +00:00
Evan Cheng
5a42a6a20f After 3-addressifying a two-address instruction, update the register maps; add a missing check when considering whether it's profitable to commute. rdar://8977508. 
llvm-svn: 125259
 2011-02-10 02:20:55 +00:00
Devang Patel
46db608b81 Reduce test case, smaller is better. 
llvm-svn: 125019
 2011-02-07 18:24:18 +00:00
NAKAMURA Takumi
07a84f5950 Target/X86: Tweak allocating shadow area (aka home) on Win64. It must be enough for caller to allocate one. 
llvm-svn: 124949
 2011-02-05 15:11:32 +00:00
Devang Patel
930b4b16a1 Merge .debug_loc entries whenever possible to reduce debug_loc size. 
llvm-svn: 124904
 2011-02-04 22:57:18 +00:00
Nick Lewycky
a4f2b5a934 Mark that the return is using EAX so that we don't use it for some other 
purpose. Fixes PR9080!

llvm-svn: 124903
 2011-02-04 22:44:08 +00:00
Devang Patel
a586bb8ecd DebugLoc associated with a machine instruction is used to emit location entries. DebugLoc associated with a DBG_VALUE is used to identify lexical scope of the variable. After register allocation, while inserting DBG_VALUE remember original debug location for the first instruction and reuse it, otherwise dwarf writer may be mislead in identifying the variable's scope. 
llvm-svn: 124845
 2011-02-04 01:43:25 +00:00
Rafael Espindola
b0a802c8bf Add -march to fix the bots. 
llvm-svn: 124774
 2011-02-03 04:21:01 +00:00
Rafael Espindola
5bfba89832 Fix PR9127 by reversing the operands even if they have more then one use. 
Reversing the operands allows us to fold, but doesn't force us to. Also, at
this point the DAG is still being optimized, so the check for hasOneUse is not
very precise.

llvm-svn: 124773
 2011-02-03 03:58:05 +00:00
Devang Patel
97c467ee47 Keep track of incoming argument's location while emitting LiveIns. 
llvm-svn: 124611
 2011-01-31 21:38:14 +00:00
Benjamin Kramer
6b3c3de09a Teach DAGCombine to fold fold (sra (trunc (sr x, c1)), c2) -> (trunc (sra x, c1+c2) when c1 equals the amount of bits that are truncated off. 
This happens all the time when a smul is promoted to a larger type.

On x86-64 we now compile "int test(int x) { return x/10; }" into
  movslq  %edi, %rax
  imulq $1717986919, %rax, %rax
  movq  %rax, %rcx
  shrq  $63, %rcx
  sarq  $34, %rax <- used to be "shrq $32, %rax; sarl $2, %eax"
  addl  %ecx, %eax

This fires 96 times in gcc.c on x86-64.

llvm-svn: 124559
 2011-01-30 16:38:43 +00:00
Evan Cheng
4af5487b74 Re-apply r124518 with fix. Watch out for invalidated iterator. 
llvm-svn: 124526
 2011-01-29 04:46:23 +00:00
Evan Cheng
1f943b9b13 Revert r124518. It broke Linux self-host. 
llvm-svn: 124522
 2011-01-29 02:43:04 +00:00
Evan Cheng
a1e4cb5f09 Re-commit r124462 with fixes. Tail recursion elim will now dup ret into unconditional predecessor to enable TCE on demand. 
llvm-svn: 124518
 2011-01-29 01:29:26 +00:00
Evan Cheng
5b6c72e549 Revert r124462. There are a few big regressions that I need to fix first. 
llvm-svn: 124478
 2011-01-28 07:12:38 +00:00
Rafael Espindola
d93551f227 Add a triple. 
llvm-svn: 124471
 2011-01-28 03:57:55 +00:00
Rafael Espindola
9bc19ee478 Print the visibility of declarations. 
llvm-svn: 124468
 2011-01-28 03:20:10 +00:00
Evan Cheng
7031f450b3 - Stop simplifycfg from duplicating "ret" instructions into unconditional 
branches. PR8575, rdar://5134905, rdar://8911460.
- Allow codegen tail duplication to dup small return blocks after register
  allocation is done.

llvm-svn: 124462
 2011-01-28 02:19:21 +00:00
NAKAMURA Takumi
8ace7260cc Target/X86: Tweak win64's tailcall. 
llvm-svn: 124272
 2011-01-26 02:04:09 +00:00
NAKAMURA Takumi
066378440a Fix whitespace. 
llvm-svn: 124270
 2011-01-26 02:03:37 +00:00
Devang Patel
fce915414e Resolve DanglingDbgValue of PHI nodes where the use follows dbg.value intrinisic. 
llvm-svn: 124203
 2011-01-25 18:09:58 +00:00
Devang Patel
431a9b9c2f Speculatively revert r124138. 
llvm-svn: 124142
 2011-01-24 20:04:37 +00:00
Devang Patel
5ccc4e884c Resolve DanglingDbgValue of PHI nodes where the use follows dbg.value intrinisic. 
llvm-svn: 124138
 2011-01-24 19:24:37 +00:00
Chris Lattner
9ba0a83f2b fix a missing shuffle pattern, PR9009. Patch by Artiom Myaskouvskey! 
llvm-svn: 124102
 2011-01-24 03:42:46 +00:00
Eric Christopher
f7579ff174 Expand invalid return values for umulo and smulo. Handle these similarly 
to add/sub by doing the normal operation and then checking for overflow
afterwards. This generally relies on the DAG handling the later invalid
operations as well.

Fixes the 64-bit part of rdar://8622122 and rdar://8774702.

llvm-svn: 123908
 2011-01-20 08:54:28 +00:00
Benjamin Kramer
869dc645f1 Fix an off-by-one error in ctpop combining. 
llvm-svn: 123664
 2011-01-17 18:00:28 +00:00
Benjamin Kramer
e9488ed8eb Add a DAGCombine to turn (ctpop x) u< 2 into (x & x-1) == 0. 
This shaves off 4 popcounts from the hacked 186.crafty source.

This is enabled even when a native popcount instruction is available. The
combined code is one operation longer but it should be faster nevertheless.

llvm-svn: 123621
 2011-01-17 12:04:57 +00:00
Rafael Espindola
9afb7af08a Update tests. 
llvm-svn: 123591
 2011-01-16 18:02:57 +00:00
Chris Lattner
dde85de90f fix PR8514, a bug where the "heroic" transformation of shift/and 
into and/shift would cause nodes to move around and a dangling pointer
to happen.  The code tried to avoid this with a HandleSDNode, but 
got the details wrong.

llvm-svn: 123578
 2011-01-16 08:48:11 +00:00
Chris Lattner
24ea7f696e fix PR8981, a crash trying to form a conditional inc with a floating point compare. 
llvm-svn: 123560
 2011-01-16 02:56:53 +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
Eric Christopher
3821f63f4b Experiment with changing the default 32-bit linux stack alignment to 
16 bytes for PR8969. Update all testcases accordingly.

llvm-svn: 123367
 2011-01-13 06:47:10 +00:00
Jakob Stoklund Olesen
3987889b61 Try again enabling LiveDebugVariables. 
llvm-svn: 123342
 2011-01-12 23:36:21 +00:00
Jakob Stoklund Olesen
1f7052b53b The world is not ready for LiveDebugVariables yet. 
llvm-svn: 123290
 2011-01-11 23:20:33 +00:00
Jakob Stoklund Olesen
d7a523358c Enable LiveDebugVariables by default. 
llvm-svn: 123282
 2011-01-11 22:45:28 +00:00
Dale Johannesen
cd78621861 Fix PR 8916 (qv for analysis), at least the immediate problem. 
There's an inherent tension in DAGCombine between assuming
that things will be put in canonical form, and the Depth
mechanism that disables transformations when recursion gets
too deep.  It would not surprise me if there's a lot of little
bugs like this one waiting to be discovered.  The mechanism
seems fragile and I'd suggest looking at it from a design viewpoint.

llvm-svn: 123191
 2011-01-10 21:53:07 +00:00
Evan Cheng
1afd04fc59 Recognize inline asm 'rev /bin/bash, ' as a bswap intrinsic call. 
llvm-svn: 123048
 2011-01-08 01:24:27 +00:00
Evan Cheng
aa16fd02ad Do not model all INLINEASM instructions as having unmodelled side effects. 
Instead encode llvm IR level property "HasSideEffects" in an operand (shared
with IsAlignStack). Added MachineInstrs::hasUnmodeledSideEffects() to check
the operand when the instruction is an INLINEASM.

This allows memory instructions to be moved around INLINEASM instructions.

llvm-svn: 123044
 2011-01-07 23:50:32 +00:00
Devang Patel
d3ba97949a Speculatively revert r123032. 
llvm-svn: 123039
 2011-01-07 22:33:41 +00:00
Devang Patel
a52d6c216d Appropriately truncate debug info range in dwarf output. 
Enable live debug variables pass.

llvm-svn: 123032
 2011-01-07 21:30:41 +00:00
Evan Cheng
ae26b91353 Revert r122955. It seems using movups to lower memcpy can cause massive regression (even on Nehalem) in edge cases. I also didn't see any real performance benefit. 
llvm-svn: 123015
 2011-01-07 19:35:30 +00:00
Benjamin Kramer
a842a10fc1 Try to unbreak the arm buildbot. 
llvm-svn: 122999
 2011-01-07 11:35:21 +00:00
Duncan Sands
06444485ee Fix the other problem reported in PR8582. Testcase and patch by 
Nadav Rotem.

llvm-svn: 122983
 2011-01-06 23:45:22 +00:00
Evan Cheng
1a1771584e Use movups to lower memcpy and memset even if it's not fast (like corei7). 
The theory is it's still faster than a pair of movq / a quad of movl. This
will probably hurt older chips like P4 but should run faster on current
and future Intel processors. rdar://8817010

llvm-svn: 122955
 2011-01-06 07:58:36 +00:00
Evan Cheng
cb39cc2164 Re-implement r122936 with proper target hooks. Now getMaxStoresPerMemcpy 
etc. takes an option OptSize. If OptSize is true, it would return
the inline limit for functions with attribute OptSize.

llvm-svn: 122952
 2011-01-06 06:52:41 +00:00
Evan Cheng
70711ea54d Revert r122936. I'll re-implement the change. 
llvm-svn: 122949
 2011-01-06 06:17:53 +00:00