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Commit Graph

4263 Commits

Author SHA1 Message Date
Peter Collingbourne
657e872155 Emit prefix data after debug and EH directives.
This ensures that the prefix data is treated as part of the function for
the purpose of debug info.  This provides a better debugging experience,
among other things by allowing a debug info client to correctly look up
a function in debug info given a function pointer.

llvm-svn: 193042
2013-10-20 02:16:21 +00:00
David Majnemer
70efa1983f Test case for r192957
Forgot to 'svn add'

llvm-svn: 192978
2013-10-18 14:49:59 +00:00
Hans Wennborg
33576424a9 Revert "Re-commit r192758 - MC: quote tricky symbol names in asm output"
This caused the clang-native-mingw32-win7 buildbot to break.

The assembler was complaining about the following lines that were showing up
in the asm for CrashRecoveryContext.cpp:

  movl  $"__ZL16ExceptionHandlerP19_EXCEPTION_POINTERS@4", 4(%eax)
  calll "_AddVectoredExceptionHandler@8"
  .def   "__ZL16ExceptionHandlerP19_EXCEPTION_POINTERS@4";
  "__ZL16ExceptionHandlerP19_EXCEPTION_POINTERS@4":
  calll "_RemoveVectoredExceptionHandler@4"

Reverting for now.

llvm-svn: 192940
2013-10-18 02:14:40 +00:00
Bill Wendling
c98a0f705a Add testcase to make sure we don't generate a compact unwind section for ELF binaries.
This tests r190354.

llvm-svn: 192903
2013-10-17 17:38:49 +00:00
Benjamin Kramer
302eac4a38 Fix tests not to depend on specific regalloc or instruction order.
They were failing with -mcpu=atom.

llvm-svn: 192890
2013-10-17 12:41:05 +00:00
Andrea Di Biagio
f45ea088f7 Fix edge condition in DAGCombiner to improve codegen of shift sequences.
When canonicalizing dags according to the rule
(shl (zext (shr X, c1) ), c1) ==> (zext (shl (shr X, c1), c1))

remember to add the new shl dag to the DAGCombiner worklist of nodes.
If we don't explicitly add it to the worklist of nodes to visit, we
may not trigger later on the rule that folds the shift left + logical
shift right into a AND instruction with bitmask.

llvm-svn: 192883
2013-10-17 11:02:58 +00:00
Jim Grosbach
504d93cae7 x86: Move bitcasts outside concat_vector.
Consider the following:

typedef unsigned short ushort4U __attribute__((ext_vector_type(4),
aligned(2)));
typedef unsigned short ushort4 __attribute__((ext_vector_type(4)));
typedef unsigned short ushort8 __attribute__((ext_vector_type(8)));
typedef int int4 __attribute__((ext_vector_type(4)));

int4 __bbase_cvt_int(ushort4 v) {
  ushort8 a;
  a.lo = v;
  return _mm_cvtepu16_epi32(a);
}

This generates the, not unreasonable, IR:
define <4 x i32> @foo0(double %v.coerce) nounwind ssp {
  %tmp = bitcast double %v.coerce to <4 x i16>
  %tmp1 = shufflevector <4 x i16> %tmp, <4 x i16> undef, <8 x i32> <i32
  %0, i32 1, i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef>
  %tmp2 = tail call <4 x i32> @llvm.x86.sse41.pmovzxwd(<8 x i16> %tmp1)
  ret <4 x i32> %tmp2
}

The problem is when type legalization gets hold of the v4i16. It
legalizes that by spilling to the stack, then doing a zero-extending
load. Things go even more silly from there, ending up with something
like:
_foo0:
  movsd %xmm0, -8(%rsp)       <== Spill to the stack.
  movq  -8(%rsp), %xmm0       <== Reload it right back out.
  pmovzxwd  %xmm0, %xmm1      <== Here's what we actually asked for.
  pblendw $1, %xmm1, %xmm0    <== We don't need this at all
  pmovzxwd  %xmm0, %xmm0      <== We already did this
  ret

The v8i8 to v8i16 zext intrinsic gives even worse results, with two
table lookups via pshufb instructions(!!).

To avoid all that, we can move the bitcasting until after we've formed
the wider (legal) vector type. Then our normal codegen flows along
nicely and we get the expected:
_foo0:
  pmovzxwd  %xmm0, %xmm0
  ret

rdar://15245794

llvm-svn: 192866
2013-10-17 02:58:06 +00:00
Hans Wennborg
822f0080df Re-commit r192758 - MC: quote tricky symbol names in asm output
The reason this got reverted was that the @feat.00 symbol which was emitted
for every TU became quoted, and on cygwin/mingw we use the gas assembler which
couldn't handle the quotes.

This commit fixes the problem by only emitting @feat.00 for win32, where we use
clang -cc1as to assemble. gas would just drop this symbol anyway, so there is no
loss there.

With @feat.00 gone, there shouldn't be quoted symbols showing up on cygwin since
it uses the Itanium ABI, which doesn't put these funny characters in symbols.

> Because of win32 mangling, we produce symbol and section names with
> funny characters in them, most notably @ characters.
>
> MC would choke on trying to parse its own assembly output. This patch addresses
> that by:
>
> - Making @ trigger quoting of symbol names
> - Also quote section names in the same way
> - Just parse section names like other identifiers (to allow for quotes)
> - Don't assume @ signifies a symbol variant if it is in a string.

llvm-svn: 192859
2013-10-17 01:13:02 +00:00
Yunzhong Gao
23e948dd2f Enabling 3DNow! prefetch instruction for a few AMD processors: bobcat, jaguar,
bulldozer and piledriver. Support for the instruction itself seems to have
already been added in r178040.

Differential Revision: http://llvm-reviews.chandlerc.com/D1933

llvm-svn: 192828
2013-10-16 19:04:11 +00:00
Benjamin Kramer
0d16abf302 DAGCombiner: Don't fold xor into not if getNOT would introduce an illegal constant.
This happens e.g. with <2 x i64> -1 on x86_32. It cannot be generated directly
because i64 is illegal. It would be nice if getNOT would handle this
transparently, but I don't see a way to generate a legal constant there right
now. Fixes PR17487.

llvm-svn: 192795
2013-10-16 14:16:19 +00:00
NAKAMURA Takumi
ab81f8a305 Revert r192758 (and r192759), "MC: Better handling of tricky symbol and section names"
GNU AS didn't like quotes in symbol names.

    Error: junk at end of line, first unrecognized character is `"'

        .def "@feat.00";
        "@feat.00" = 1

Reproduced on Cygwin's 2.23.52.20130309 and mingw32's 2.20.1.20100303.

llvm-svn: 192775
2013-10-16 08:22:49 +00:00
Rafael Espindola
3779f822e1 Add a triple to this test.
llvm-svn: 192767
2013-10-16 02:27:33 +00:00
Rafael Espindola
c17b7cf2ed Add support for metadata representing .ident directives.
llvm-svn: 192764
2013-10-16 01:49:05 +00:00
Hans Wennborg
3b3efddc64 MC: Better handling of tricky symbol and section names
Because of win32 mangling, we produce symbol and section names with
funny characters in them, most notably @ characters.

MC would choke on trying to parse its own assembly output. This patch addresses
that by:

- Making @ trigger quoting of symbol names
- Also quote section names in the same way
- Just parse section names like other identifiers (to allow for quotes)
- Don't assume @ signifies a symbol variant if it is in a string.

Differential Revision: http://llvm-reviews.chandlerc.com/D1945

llvm-svn: 192758
2013-10-16 01:20:40 +00:00
Andrew Trick
e3e67d4a0a Enable MI Sched for x86.
This changes the SelectionDAG scheduling preference to source
order. Soon, the SelectionDAG scheduler can be bypassed saving
a nice chunk of compile time.

Performance differences that result from this change are often a
consequence of register coalescing. The register coalescer is far from
perfect. Bugs can be filed for deficiencies.

On x86 SandyBridge/Haswell, the source order schedule is often
preserved, particularly for small blocks.

Register pressure is generally improved over the SD scheduler's ILP
mode. However, we are still able to handle large blocks that require
latency hiding, unlike the SD scheduler's BURR mode. MI scheduler also
attempts to discover the critical path in single-block loops and
adjust heuristics accordingly.

The MI scheduler relies on the new machine model. This is currently
unimplemented for AVX, so we may not be generating the best code yet.

Unit tests are updated so they don't depend on SD scheduling heuristics.

llvm-svn: 192750
2013-10-15 23:33:07 +00:00
Michael Liao
1081bbac6c Fix PR17546
- Type of index used in extract_vector_elt or insert_vector_elt supposes
  to be TLI.getVectorIdxTy() which is pointer type on most targets. It'd
  better to truncate (or zero-extend in case it's changed later) it to
  mask element type to guarantee they are matching instead of asserting
  that.

llvm-svn: 192722
2013-10-15 17:51:58 +00:00
Michael Liao
a94d0a900a Fix PR16807
- Lower signed division by constant powers-of-2 to target-independent
  DAG operators instead of target-dependent ones to support them better
  on targets where vector types are legal but shift operators on that
  types are illegal. E.g., on AVX, PSRAW is only available on <8 x i16>
  though <16 x i16> is a legal type.

llvm-svn: 192721
2013-10-15 17:51:02 +00:00
NAKAMURA Takumi
8c0f09fed1 llvm/test/CodeGen/X86/break-avx-dep.ll: Relax an expression to be matched to also r[89], not only rXX.
llvm-svn: 192675
2013-10-15 06:36:36 +00:00
Andrew Trick
e196a05dc8 Improve on r192635, ExeDepsFix for avx, and add a test case.
rdar:15221834 False AVX register dependencies cause 5x slowdown on
flops-5/6 and significant slowdown on several others.

This was blocking the switch to MI-Sched.

llvm-svn: 192669
2013-10-15 03:39:43 +00:00
Quentin Colombet
cb4b84532c [X86][FastISel] During X86 fastisel, the address of indirect call was resolved
through bitcast, ptrtoint, and inttoptr instructions. This is valid
only if the related instructions are in that same basic block, otherwise
we may reference variables that were not live accross basic blocks
resulting in undefined virtual registers.

The bug was exposed when both SDISel and FastISel were used within the same
function, i.e., one basic block is issued with FastISel and another with SDISel,
as demonstrated with the testcase.

<rdar://problem/15192473>

llvm-svn: 192636
2013-10-14 22:32:09 +00:00
Nick Lewycky
0da8d88a82 Fix a typo, in a comment, in a test.
llvm-svn: 192632
2013-10-14 22:02:53 +00:00
Eric Christopher
1a04817b81 Revert part of a fix from 2010, changes since then:
a) x86-64 TLS has been documented
b) the code path should use movq for the correct relocation
   to be generated.

I've also added a fixme for the test case that we should improve
the code generated, it should look something like is documented
in the tls abi document.

llvm-svn: 192631
2013-10-14 21:52:26 +00:00
Will Dietz
ad27c13a64 MachineSink: Fix and tweak critical-edge breaking heuristic.
Per original comment, the intention of this loop
is to go ahead and break the critical edge
(in order to sink this instruction) if there's
reason to believe doing so might "unblock" the
sinking of additional instructions that define
registers used by this one.  The idea is that if
we have a few instructions to sink "together"
breaking the edge might be worthwhile.

This commit makes a few small changes
to help better realize this goal:

First, modify the loop to ignore registers
defined by this instruction.  We don't
sink definitions of physical registers,
and sinking an SSA definition isn't
going to unblock an upstream instruction.

Second, ignore uses of physical registers.
Instructions that define physical registers are
rejected for sinking, and so moving this one
won't enable moving any defining instructions.
As an added bonus, while virtual register
use-def chains are generally small due
to SSA goodness, iteration over the uses
and definitions (used by hasOneNonDBGUse)
for physical registers like EFLAGS
can be rather expensive in practice.
(This is the original reason for looking at this)

Finally, to keep things simple continue
to only consider this trick for registers that
have a single use (via hasOneNonDBGUse),
but to avoid spuriously breaking critical edges
only do so if the definition resides
in the same MBB and therefore this one directly
blocks it from being sunk as well.
If sinking them together is meant to be,
let the iterative nature of this pass
sink the definition into this block first.

Update tests to accomodate this change,
add new testcase where sinking avoids pipeline stalls.

llvm-svn: 192608
2013-10-14 16:57:17 +00:00
Elena Demikhovsky
c460e7e50a Fixed a bug in dynamic allocation memory on stack.
The alignment of allocated space was wrong, see Bugzila 17345.

Done by Zvi Rackover <zvi.rackover@intel.com>.

llvm-svn: 192573
2013-10-14 07:26:51 +00:00
Benjamin Kramer
3000b81f9a Force a CPU on test so it doesn't depend on microarchitectural scheduling decisions.
llvm-svn: 192532
2013-10-12 11:17:12 +00:00
Quentin Colombet
7ba3455dfc [DAGCombiner] Load slicing test case: attempt to really fix the buildbots (used sse4.2 instead of avx!).
<rdar://problem/14477220>

llvm-svn: 192480
2013-10-11 18:54:49 +00:00
Quentin Colombet
c02e5604f4 [DAGCombiner] Reapply load slicing (192471) with a test that explicitly set sse4.2 support.
This should fix the buildbots.

Original commit message:
[DAGCombiner] Slice a big load in two loads when the element are next to each
other in memory and the target has paired load and performs post-isel loads
combining.

E.g., this optimization will transform something like this:
a = load i64* addr
b = trunc i64 a to i32
c = lshr i64 a, 32
d = trunc i64 c to i32

into:
b = load i32* addr1
d = load i32* addr2
Where addr1 = addr2 +/- sizeof(i32), if the target supports paired load and
performs post-isel loads combining.

One should overload TargetLowering::hasPairedLoad to provide this information.
The default is false.

<rdar://problem/14477220>

llvm-svn: 192476
2013-10-11 18:29:42 +00:00
Quentin Colombet
fd0097531f [DAGCombiner] Revert load slicing (r192471), until I figure out why it fails on ubuntu.
llvm-svn: 192474
2013-10-11 18:17:17 +00:00
Quentin Colombet
b60dc81c8b [DAGCombiner] Slice a big load in two loads when the element are next to each
other in memory and the target has paired load and performs post-isel loads
combining.

E.g., this optimization will transform something like this:
 a = load i64* addr
 b = trunc i64 a to i32
 c = lshr i64 a, 32
 d = trunc i64 c to i32

into:
 b = load i32* addr1
 d = load i32* addr2
Where addr1 = addr2 +/- sizeof(i32), if the target supports paired load and
performs post-isel loads combining.

One should overload TargetLowering::hasPairedLoad to provide this information.
The default is false.

<rdar://problem/14477220>

llvm-svn: 192471
2013-10-11 18:01:14 +00:00
Matthias Braun
9e9e0f5d4c Tests: Do not unnecessarily depend on kill comments
llvm-svn: 192404
2013-10-10 22:37:49 +00:00
Benjamin Kramer
11421cc493 Disable function padding to get this test to pass on atom.
llvm-svn: 192348
2013-10-10 12:46:23 +00:00
Elena Demikhovsky
f24ecf7862 AVX-512: Added VRCP28 and VRSQRT28 instructions and intrinsics.
llvm-svn: 192283
2013-10-09 08:16:14 +00:00
Craig Topper
d5082631e1 Add in64BitMode/in32BitMode to the MMX/SSE2/AVX maskmovq/dq instructions. This way the asm parser will pick the right one based on the mode. Instruction selection already did the right thing based on the pointer size.
llvm-svn: 192266
2013-10-09 02:18:34 +00:00
Craig Topper
2d70555027 Fix a typo in the mattr part of the run line.
llvm-svn: 192174
2013-10-08 06:12:26 +00:00
Craig Topper
3d7c6afb79 Explicitly disable AVX on a bunch of tests so they won't fail on AVX machines post r192171.
llvm-svn: 192173
2013-10-08 06:06:57 +00:00
Craig Topper
aa1a4d51f0 Remove some instructions that existed to provide aliases to the assembler. Can be done with InstAlias instead. Unfortunately, this was causing printer to use 'vmovq' or 'vmovd' based on what was parsed. To cleanup the inconsistencies convert all 'vmovd' with 64-bit registers to 'vmovq', but provide an alias so that 'vmovd' will still parse.
llvm-svn: 192171
2013-10-08 05:53:50 +00:00
Benjamin Kramer
feace9b737 X86: Fix type check. Just because an integer type is illegal doesn't mean it's i64.
Fixes PR17495, where an i24 triggered this code. It's intended to
optimize i64 loads on 32 bit x86.

llvm-svn: 192123
2013-10-07 19:11:35 +00:00
Matt Arsenault
9c8541d286 Change objectsize intrinsic to accept different address spaces.
Bitcasting everything to i8* won't work. Autoupgrade the old
intrinsic declarations to use the new mangling.

llvm-svn: 192117
2013-10-07 18:06:48 +00:00
Rafael Espindola
499aaf305a Add support for aliases with linkonce_odr.
This will be used to extend constructor aliases in clang.

llvm-svn: 192066
2013-10-06 15:10:43 +00:00
Benjamin Kramer
44710574cb Force a CPU that doesn't have AVX, otherwise this test fails.
llvm-svn: 192065
2013-10-06 13:52:41 +00:00
Benjamin Kramer
a7e734d765 X86: Don't fold spills into SSE operations if the stack is unaligned.
Regalloc can emit unaligned spills nowadays, but we can't fold the
spills into SSE ops if we can't guarantee alignment. PR12250.

llvm-svn: 192064
2013-10-06 13:48:22 +00:00
Elena Demikhovsky
cb8eaca2e4 AVX-512: added scalar convert instructions and intrinsics.
Fixed load folding in VPERM2I instruction.

llvm-svn: 192063
2013-10-06 13:11:09 +00:00
Elena Demikhovsky
0ff833ab99 AVX-512: fixed shuffle lowering
in case of BLEND and added VSHUFPS patterns.

llvm-svn: 192055
2013-10-06 06:11:18 +00:00
Benjamin Kramer
3a6afef4e7 Emit a better error when running out of registers on inline asm.
The most likely case where this error happens is when the user specifies
too many register operands. Don't make it look like an internal LLVM bug
when we can see that the error is coming from an inline asm instruction.
For other instructions we keep the "ran out of registers" error.

llvm-svn: 192041
2013-10-05 19:33:37 +00:00
Craig Topper
0a8f3fc996 Remove unneeded TBM intrinsics. The arithmetic/logical operation patterns are sufficient.
llvm-svn: 192039
2013-10-05 19:22:59 +00:00
Craig Topper
d0a63f6722 Add an additional pattern for BLCI since opt can turn (not (add x, 1)) into (sub -2, x).
llvm-svn: 192037
2013-10-05 17:17:53 +00:00
Rafael Espindola
86d473eceb Convert test to FileCheck.
llvm-svn: 192025
2013-10-05 02:58:36 +00:00
Craig Topper
5b62ea95ec Remove duplicated test cases that occurred when I applied the same patch file to my model twice.
llvm-svn: 191873
2013-10-03 04:27:14 +00:00
Craig Topper
5ac188d0f2 Add patterns for selecting TBM instructions from logical operations. Patch from Yunzhong Gao.
llvm-svn: 191871
2013-10-03 04:16:45 +00:00
Elena Demikhovsky
ee11e148e9 AVX-512: fixed a bug in getLoadStoreRegOpcode() for AVX-512 target
llvm-svn: 191818
2013-10-02 12:20:42 +00:00