oota-llvm.git
12 years agoWhen emitting the PC range in an FDE, use the same data encoding for both ends
Nick Lewycky [Sun, 12 Aug 2012 08:09:45 +0000 (08:09 +0000)]
When emitting the PC range in an FDE, use the same data encoding for both ends
of the range. Fixes PR13581!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161739 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoRemove call to setOperationAction for SETCC of v4f32. SETCC returns an integer type...
Craig Topper [Sun, 12 Aug 2012 05:31:32 +0000 (05:31 +0000)]
Remove call to setOperationAction for SETCC of v4f32. SETCC returns an integer type not an FP type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161738 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoRemove unnecessary call to setOperationAction for SETCC of v2i64 under SSE42. It...
Craig Topper [Sun, 12 Aug 2012 05:15:16 +0000 (05:15 +0000)]
Remove unnecessary call to setOperationAction for SETCC of v2i64 under SSE42. It was already called for the same under SSE2.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161737 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoRevert 161581: Patch to implement UMLAL/SMLAL instructions for the ARM
Arnold Schwaighofer [Sun, 12 Aug 2012 05:11:56 +0000 (05:11 +0000)]
Revert 161581: Patch to implement UMLAL/SMLAL instructions for the ARM
architecture

It broke MultiSource/Applications/JM/ldecod/ldecod on armv7 thumb O0 g and armv7
thumb O3.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161736 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoChange addTypeForNeon to use MVT instead of EVT so all the calls to getSimpleVT can...
Craig Topper [Sun, 12 Aug 2012 03:16:37 +0000 (03:16 +0000)]
Change addTypeForNeon to use MVT instead of EVT so all the calls to getSimpleVT can be removed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161735 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoMake replace many calls to getSizeInBits() with is128BitVector/is256BitVector
Craig Topper [Sun, 12 Aug 2012 02:23:29 +0000 (02:23 +0000)]
Make replace many calls to getSizeInBits() with is128BitVector/is256BitVector

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161734 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoUse MVT.isXBitVector instead of EVT.isXBitVector when setting up operation actions...
Craig Topper [Sun, 12 Aug 2012 00:34:56 +0000 (00:34 +0000)]
Use MVT.isXBitVector instead of EVT.isXBitVector when setting up operation actions. Compiles to smaller code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161733 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agofix PR13577, an issue introduced by r161687
Michael Liao [Sat, 11 Aug 2012 23:47:06 +0000 (23:47 +0000)]
fix PR13577, an issue introduced by r161687

- FCMOV only supports a subset of X86 conditions. Skip boolean
  simplification if X86 condition is not valid for FCMOV.
- add a minimal test case for PR13577.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161732 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoCreate isXBitVector methods in MVT and call them from EVT. This allows targets to...
Craig Topper [Sat, 11 Aug 2012 23:31:18 +0000 (23:31 +0000)]
Create isXBitVector methods in MVT and call them from EVT. This allows targets to call them with an MVT without needing to convert to EVT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161731 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoMove setOperationAction for CONCAT_VECTORS for 256-bit vectors into loop since all...
Craig Topper [Sat, 11 Aug 2012 22:34:26 +0000 (22:34 +0000)]
Move setOperationAction for CONCAT_VECTORS for 256-bit vectors into loop since all 256-bit types are supported.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161730 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoMachineCSE: Hoist isConstantPhysReg out of the loop, it checks for overlaps already.
Benjamin Kramer [Sat, 11 Aug 2012 20:42:59 +0000 (20:42 +0000)]
MachineCSE: Hoist isConstantPhysReg out of the loop, it checks for overlaps already.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161729 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoPR13578: Teach MachineCSE that instructions that use a constant register can be CSE...
Benjamin Kramer [Sat, 11 Aug 2012 19:05:13 +0000 (19:05 +0000)]
PR13578: Teach MachineCSE that instructions that use a constant register can be CSE'd safely.

This is common e.g. when doing rip-relative addressing on x86_64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161728 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoTidy up indentation. No functional change.
Craig Topper [Sat, 11 Aug 2012 17:53:00 +0000 (17:53 +0000)]
Tidy up indentation. No functional change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161727 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFix a cast that was casting away 'const' unnecessarily
Craig Topper [Sat, 11 Aug 2012 17:46:16 +0000 (17:46 +0000)]
Fix a cast that was casting away 'const' unnecessarily

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161726 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd a couple default: llvm_unreachable() to some switch statements. Fix a bad message...
Craig Topper [Sat, 11 Aug 2012 17:44:14 +0000 (17:44 +0000)]
Add a couple default: llvm_unreachable() to some switch statements. Fix a bad message in an existing llvm_unreachable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161725 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoX86: when we are auto-detecting the subtarget features, make sure we turn on
Manman Ren [Fri, 10 Aug 2012 23:43:32 +0000 (23:43 +0000)]
X86: when we are auto-detecting the subtarget features, make sure we turn on
FeatureFastUAMem for Nehalem, Westmere and Sandy Bridge.

FeatureFastUAMem is already on if we pass in nehalem or westmere as a command
argument.

rdar: 7252306

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161717 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd a proper if-conversion cost model.
Jakob Stoklund Olesen [Fri, 10 Aug 2012 22:27:31 +0000 (22:27 +0000)]
Add a proper if-conversion cost model.

Detect when there is not enough available ILP, so if-conversion can't
speculate instructions for free.

Compute the lengthening of the critical path when inserting a select
instruction that depends on the condition as well as both sides of the
if.

Reject conversions that would stretch the critical path by more than
half a mispredict penalty.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161713 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoGive MachineTraceMetrics its own debug tag.
Jakob Stoklund Olesen [Fri, 10 Aug 2012 22:27:29 +0000 (22:27 +0000)]
Give MachineTraceMetrics its own debug tag.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161712 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd more trace query functions.
Jakob Stoklund Olesen [Fri, 10 Aug 2012 22:27:27 +0000 (22:27 +0000)]
Add more trace query functions.

Trace::getResourceLength() computes the number of cycles required to
execute the trace when ignoring data dependencies. The number can be
compared to the critical path to estimate the trace ILP.

Trace::getPHIDepth() computes the data dependency depth of a PHI in a
trace successor that isn't necessarily part of the trace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161711 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoThe normal edge of an invoke is not allowed to branch to a block with a
Eli Friedman [Fri, 10 Aug 2012 20:55:20 +0000 (20:55 +0000)]
The normal edge of an invoke is not allowed to branch to a block with a
landingpad.  Enforce it in the verifier, and fix the regression tests to match.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161697 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoARM: enable struct byval for AAPCS.
Manman Ren [Fri, 10 Aug 2012 20:39:38 +0000 (20:39 +0000)]
ARM: enable struct byval for AAPCS.
This change is to be enabled in clang.

rdar://9877866
PR://13350

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161693 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd getTPred() and getFPred() functions.
Jakob Stoklund Olesen [Fri, 10 Aug 2012 20:19:17 +0000 (20:19 +0000)]
Add getTPred() and getFPred() functions.

They identify the PHI predecessors in both diamonds and triangles.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161689 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoInclude loop-carried dependencies when computing instr heights.
Jakob Stoklund Olesen [Fri, 10 Aug 2012 20:11:38 +0000 (20:11 +0000)]
Include loop-carried dependencies when computing instr heights.

When a trace ends with a back-edge, include PHIs in the loop header in
the height computations. This makes the critical path through a loop
more accurate by including the latencies of the last instructions in the
loop.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161688 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoadd X86-specific DAG optimization to simplify boolean test
Michael Liao [Fri, 10 Aug 2012 19:58:13 +0000 (19:58 +0000)]
add X86-specific DAG optimization to simplify boolean test

- if a boolean test (X86ISD::CMP or X86ISD:SUB) checks a boolean value
  generated from X86ISD::SETCC, try to simplify the boolean value
  generation and checking by reusing the original EFLAGS with proper
  condition code
- add hooks to X86 specific SETCC/BRCOND/CMOV, the major 3 places
  consuming EFLAGS

part of patches fixing PR12312

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161687 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoA couple of addition comment fixes
Eli Bendersky [Fri, 10 Aug 2012 18:30:44 +0000 (18:30 +0000)]
A couple of addition comment fixes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161678 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFix a couple of typos in comments
Eli Bendersky [Fri, 10 Aug 2012 18:26:20 +0000 (18:26 +0000)]
Fix a couple of typos in comments

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161677 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoConstify some basic blocks, no functionality change.
Rafael Espindola [Fri, 10 Aug 2012 15:55:25 +0000 (15:55 +0000)]
Constify some basic blocks, no functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161668 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoremove tailing whitespaces and test commit
Michael Liao [Fri, 10 Aug 2012 14:39:24 +0000 (14:39 +0000)]
remove tailing whitespaces and test commit

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161664 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoMove BasicBlockEdge to the cpp file. No functionality change.
Rafael Espindola [Fri, 10 Aug 2012 14:05:55 +0000 (14:05 +0000)]
Move BasicBlockEdge to the cpp file. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161663 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agostdcxx's cstdio doesn't include stdio.h, but the code using PathV2.inc
Joerg Sonnenberger [Fri, 10 Aug 2012 10:56:09 +0000 (10:56 +0000)]
stdcxx's cstdio doesn't include stdio.h, but the code using PathV2.inc
includes both. Deal with feof and ferror potentially being macros.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161658 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd some missing includes for the build against stdcxx.
Joerg Sonnenberger [Fri, 10 Aug 2012 10:53:56 +0000 (10:53 +0000)]
Add some missing includes for the build against stdcxx.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161657 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFix crash when when do lto on Bullet. Dynamic GEPs in SROA were incorrectly being...
Pete Cooper [Fri, 10 Aug 2012 03:26:36 +0000 (03:26 +0000)]
Fix crash when when do lto on Bullet.  Dynamic GEPs in SROA were incorrectly being applied to all accesses to an alloca, not just the ones which read from the GEP.  Thanks to Evan for reducing the test.  rdar://11861001

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161654 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoUpdate edge weights correctly in replaceSuccessor().
Jakob Stoklund Olesen [Fri, 10 Aug 2012 03:23:27 +0000 (03:23 +0000)]
Update edge weights correctly in replaceSuccessor().

When replacing Old with New, it can happen that New is already a
successor. Add the old and new edge weights instead of creating a
duplicate edge.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161653 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoRemove references to compression in llvm-ar. It has been a long time since we
Rafael Espindola [Fri, 10 Aug 2012 01:57:52 +0000 (01:57 +0000)]
Remove references to compression in llvm-ar. It has been a long time since we
switched from a bytecode+bzip2 to the current bitcode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161651 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoUse the final .version number for LLVM_MINOR_VERSION in Apple llvmCore builds.
Bob Wilson [Fri, 10 Aug 2012 00:25:30 +0000 (00:25 +0000)]
Use the final .version number for LLVM_MINOR_VERSION in Apple llvmCore builds.

We've switched to a 3-component version numbering scheme for Apple releases,
and with this scheme, the final number is the one most relevant for setting
LLVM_MINOR_VERSION.  <rdar://problem/12071459>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161645 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoReapply r161633-161634 "Partition use lists so defs always come before uses.""
Jakob Stoklund Olesen [Fri, 10 Aug 2012 00:21:30 +0000 (00:21 +0000)]
Reapply r161633-161634 "Partition use lists so defs always come before uses.""

No changes to these patches, MRI needed to be notified when changing
uses into defs and vice versa.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161644 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAlso update MRI use lists when changing a use to a def and vice versa.
Jakob Stoklund Olesen [Fri, 10 Aug 2012 00:21:26 +0000 (00:21 +0000)]
Also update MRI use lists when changing a use to a def and vice versa.

This was the cause of the buildbot failures.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161643 91177308-0d34-0410-b5e6-96231b3b80d8

12 years ago[ms-inline asm] Add a new Inline Asm Non-Standard Dialect attribute.
Chad Rosier [Fri, 10 Aug 2012 00:00:22 +0000 (00:00 +0000)]
[ms-inline asm] Add a new Inline Asm Non-Standard Dialect attribute.

This new attribute is intended to be used by the backend to determine how
the inline asm string should be parsed/printed. This patch adds the
ia_nsdialect attribute and also adds a test case to ensure the IR is
correctly parsed, but there is no functional change at this time.

The standard dialect is assumed to be AT&T.  Therefore, this attribute
should only be added to MS-style inline assembly statements, which use
the Intel dialect.  If we ever support more dialects we'll need to
add additional state to the attribute.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161641 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoRevert r161633-161634 "Partition use lists so defs always come before uses."
Jakob Stoklund Olesen [Thu, 9 Aug 2012 23:31:36 +0000 (23:31 +0000)]
Revert r161633-161634 "Partition use lists so defs always come before uses."

These commits broke a number of buildbots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161640 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoPartition use lists so defs always come before uses.
Jakob Stoklund Olesen [Thu, 9 Aug 2012 22:49:46 +0000 (22:49 +0000)]
Partition use lists so defs always come before uses.

This makes it possible to speed up def_iterator by stopping at the first
use. This makes def_empty() and getUniqueVRegDef() much faster when
there are many uses.

In a +Asserts build, LiveVariables is 100x faster in one case because
getVRegDef() has an assertion that would scan to the end of a
def_iterator chain.

Spill weight calculation is significantly faster (300x in one case)
because isTriviallyReMaterializable() calls MRI->isConstantPhysReg(%RIP)
which calls def_empty(%RIP).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161634 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoDon't use pointer-pointers for the register use lists.
Jakob Stoklund Olesen [Thu, 9 Aug 2012 22:49:42 +0000 (22:49 +0000)]
Don't use pointer-pointers for the register use lists.

Use a more conventional doubly linked list where the Prev pointers form
a cycle. This means it is no longer necessary to adjust the Prev
pointers when reallocating the VRegInfo array.

The test changes are required because the register allocation hint is
using the use-list order to break ties.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161633 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoMove use list management into MachineRegisterInfo.
Jakob Stoklund Olesen [Thu, 9 Aug 2012 22:49:37 +0000 (22:49 +0000)]
Move use list management into MachineRegisterInfo.

Register MachineOperands are kept in linked lists accessible via MRI's
reg_iterator interfaces. The linked list management was handled partly
by MachineOperand methods, partly by MRI methods.

Move all of the list management into MRI, delete
MO::AddRegOperandToRegInfo() and MO::RemoveRegOperandFromRegInfo().

Be more explicit about handling the cases where an MRI pointer isn't
available.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161632 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoRemove getARMRegisterNumbering and replace with calls into
Eric Christopher [Thu, 9 Aug 2012 22:10:21 +0000 (22:10 +0000)]
Remove getARMRegisterNumbering and replace with calls into
the register info for getEncodingValue. This builds on the
small patch of yesterday to set HWEncoding in the register
file.

One (deprecated) use was turned into a hard number to avoid
needing register info in the old JIT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161628 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFix a future TwoAddressInstructionPass crash.
Jakob Stoklund Olesen [Thu, 9 Aug 2012 22:08:26 +0000 (22:08 +0000)]
Fix a future TwoAddressInstructionPass crash.

No test case, the crash only happens when the default use list order is
changed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161627 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoDon't modify MO while use_iterator is still pointing to it.
Jakob Stoklund Olesen [Thu, 9 Aug 2012 22:08:24 +0000 (22:08 +0000)]
Don't modify MO while use_iterator is still pointing to it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161626 91177308-0d34-0410-b5e6-96231b3b80d8

12 years ago[ms-inline asm] Extend the MC AsmParser API to match MCInsts (but not emit).
Chad Rosier [Thu, 9 Aug 2012 22:04:55 +0000 (22:04 +0000)]
[ms-inline asm] Extend the MC AsmParser API to match MCInsts (but not emit).
This new API will be used by clang to parse ms-style inline asms.

One goal of this project is to use this style of inline asm for targets other
then x86.  Therefore, this API needs to be implemented for non-x86 targets at
some point in the future.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161624 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoTeach the LLVM test makefile to run the extra Clang tools' test suites
Chandler Carruth [Thu, 9 Aug 2012 20:26:41 +0000 (20:26 +0000)]
Teach the LLVM test makefile to run the extra Clang tools' test suites
as part of check-all.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161610 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAnother 32 to 64 bit sign extension bug.
Jack Carter [Thu, 9 Aug 2012 19:43:18 +0000 (19:43 +0000)]
Another 32 to 64 bit sign extension bug.

The fields in the td definition were switched.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161607 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoPatch to implement UMLAL/SMLAL instructions for the ARM architecture
Arnold Schwaighofer [Thu, 9 Aug 2012 15:25:52 +0000 (15:25 +0000)]
Patch to implement UMLAL/SMLAL instructions for the ARM architecture

This patch corrects the definition of umlal/smlal instructions and adds support
for matching them to the ARM dag combiner.

Bug 12213

Patch by Yin Ma!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161581 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFix the legalization of ExtLoad on ARM. ExpandUnalignedLoad did not properly
Nadav Rotem [Thu, 9 Aug 2012 01:56:44 +0000 (01:56 +0000)]
Fix the legalization of ExtLoad on ARM.  ExpandUnalignedLoad did not properly
handle the cases where the memory value type was illegal.
PR 13111.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161565 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoThis field isn't used anymore, use it with HWEncoding instead.
Eric Christopher [Thu, 9 Aug 2012 01:39:32 +0000 (01:39 +0000)]
This field isn't used anymore, use it with HWEncoding instead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161564 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoSupport for experimental targets
Victor Oliveira [Thu, 9 Aug 2012 01:13:59 +0000 (01:13 +0000)]
Support for experimental targets

Added LLVM_EXPERIMENTAL_TARGETS_TO_BUILD in CMake and --enable-experimental-targets in configure.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161561 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoMachineRegisterInfo was already a friend of MachineOperand, and GCC complains
Matt Beaumont-Gay [Thu, 9 Aug 2012 00:30:39 +0000 (00:30 +0000)]
MachineRegisterInfo was already a friend of MachineOperand, and GCC complains
about repeated friending.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161553 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoMove [SU]LEB128 encoding to a utility header.
Jim Grosbach [Wed, 8 Aug 2012 23:56:06 +0000 (23:56 +0000)]
Move [SU]LEB128 encoding to a utility header.

These functions are very generic. There's no reason for them to
be tied to MCObjectWriter.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161545 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoMove getNextOperandForReg() into MachineRegisterInfo.
Jakob Stoklund Olesen [Wed, 8 Aug 2012 23:44:07 +0000 (23:44 +0000)]
Move getNextOperandForReg() into MachineRegisterInfo.

MRI provides iterators for traversing the use-def chains. They should
not be accessible from anywhere else.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161543 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoDon't use getNextOperandForReg().
Jakob Stoklund Olesen [Wed, 8 Aug 2012 23:44:04 +0000 (23:44 +0000)]
Don't use getNextOperandForReg().

This way of using getNextOperandForReg() was unlikely to work as
intended. We don't give any guarantees about the order of operands in
the use-def chains, so looking only at operands following a given
operand in the chain doesn't make sense.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161542 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoDon't use getNextOperandForReg() in RAFast.
Jakob Stoklund Olesen [Wed, 8 Aug 2012 23:44:01 +0000 (23:44 +0000)]
Don't use getNextOperandForReg() in RAFast.

That particular optimization was probably premature anyway.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161541 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAllow legalization of target-specific SDNodes, provided that the target itself provid...
Owen Anderson [Wed, 8 Aug 2012 23:31:14 +0000 (23:31 +0000)]
Allow legalization of target-specific SDNodes, provided that the target itself provide a legalization hook for them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161536 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoDeal with irreducible control flow when building traces.
Jakob Stoklund Olesen [Wed, 8 Aug 2012 22:12:01 +0000 (22:12 +0000)]
Deal with irreducible control flow when building traces.

We filter out MachineLoop back-edges during the trace-building PO
traversals, but it is possible to have CFG cycles that aren't natural
loops, and MachineLoopInfo doesn't include such cycles.

Use a standard visited set to detect such CFG cycles, and completely
ignore them when picking traces.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161532 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoRemove some coding violations. No functionality change.
Bill Wendling [Wed, 8 Aug 2012 22:03:50 +0000 (22:03 +0000)]
Remove some coding violations. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161530 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoCache a commonly used reference.
Bill Wendling [Wed, 8 Aug 2012 22:01:55 +0000 (22:01 +0000)]
Cache a commonly used reference.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161529 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd test triples to fix win32 failures. Revert workaround from r161292.
Bob Wilson [Wed, 8 Aug 2012 20:31:37 +0000 (20:31 +0000)]
Add test triples to fix win32 failures.  Revert workaround from r161292.

I don't have a win32 system to test, so hopefully I got them all fixed here.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161519 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoRemove OpenBSD defines:
Bill Wendling [Wed, 8 Aug 2012 18:37:39 +0000 (18:37 +0000)]
Remove OpenBSD defines:

- The defines are in stddint.h, which is #include'd already.
- The block wasn't used anyway, since it was _OpenBSD_, and not __OpenBSD__

Patch by David Hill!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161515 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoHeed -stress-early-ifcvt.
Jakob Stoklund Olesen [Wed, 8 Aug 2012 18:24:23 +0000 (18:24 +0000)]
Heed -stress-early-ifcvt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161513 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoGet the MispredictPenalty from MCSchedModel.
Jakob Stoklund Olesen [Wed, 8 Aug 2012 18:19:58 +0000 (18:19 +0000)]
Get the MispredictPenalty from MCSchedModel.

Thanks, Andy!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161507 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agorevert my previous patch
Sebastian Pop [Wed, 8 Aug 2012 18:04:45 +0000 (18:04 +0000)]
revert my previous patch

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161505 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoenable Hexagon target from cmake
Sebastian Pop [Wed, 8 Aug 2012 17:45:43 +0000 (17:45 +0000)]
enable Hexagon target from cmake

This patch allows us to use cmake to specify a cross compiler for Hexagon.

In particular, the patch adds a missing case for the target Hexagon in
cmake/config-ix.cmake, and it moves LLVM_DEFAULT_TARGET_TRIPLE and TARGET_TRIPLE
variables from cmake/config-ix.cmake to the toplevel CMakeLists.txt to make them
available at configure time. Here is the command line that I have used to test
my patches:

$ cmake -G Ninja -D BUILD_SHARED_LIBS:BOOL=ON -D LLVM_TARGETS_TO_BUILD:STRING=Hexagon -D TARGET_TRIPLE:STRING=hexagon-unknown-linux-gnu -D LLVM_DEFAULT_TARGET_TRIPLE:STRING=hexagon-unknown-linux-gnu -D LLVM_TARGET_ARCH:STRING=hexagon-unknown-linux-gnu -D LLVM_ENABLE_PIC:BOOL=OFF ..
$ ninja check

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161504 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoTypedefs and indentation fixes from the Andy Zhang/PAX macro argument patch.
Rafael Espindola [Wed, 8 Aug 2012 14:51:03 +0000 (14:51 +0000)]
Typedefs and indentation fixes from the Andy Zhang/PAX macro argument patch.
Committing it first as it makes the "real" patch a lot easier to read.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161491 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agollvm/test/MC/COFF/seh.s: Fixup corresponding to r161487.
NAKAMURA Takumi [Wed, 8 Aug 2012 13:27:04 +0000 (13:27 +0000)]
llvm/test/MC/COFF/seh.s: Fixup corresponding to r161487.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161489 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFix for .pdata and .xdata section attributes on COFF.
Anton Korobeynikov [Wed, 8 Aug 2012 12:46:46 +0000 (12:46 +0000)]
Fix for .pdata and .xdata section attributes on COFF.
Patch by kai@redstar.de !

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161487 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoSphinxify the CommandLine document.
Bill Wendling [Wed, 8 Aug 2012 08:21:24 +0000 (08:21 +0000)]
Sphinxify the CommandLine document.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161479 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoMove header so that it can be picked up by other .rst files.
Bill Wendling [Wed, 8 Aug 2012 06:42:30 +0000 (06:42 +0000)]
Move header so that it can be picked up by other .rst files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161478 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd `.pushsection', `.popsection', and `.previous' directives to Darwin ASM.
Bill Wendling [Wed, 8 Aug 2012 06:30:30 +0000 (06:30 +0000)]
Add `.pushsection', `.popsection', and `.previous' directives to Darwin ASM.

There are situations where inline ASM may want to change the section -- for
instance, to create a variable in the .data section. However, it cannot do this
without (potentially) restoring to the wrong section. E.g.:

  asm volatile (".section __DATA, __data\n\t"
                ".globl _fnord\n\t"
                "_fnord: .quad 1f\n\t"
                ".text\n\t"
                "1:" :::);

This may be wrong if this is inlined into a function that has a "section"
attribute. The user should use `.pushsection' and `.popsection' here instead.

The addition of `.previous' is added for completeness.
<rdar://problem/12048387>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161477 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdded MispredictPenalty to SchedMachineModel.
Andrew Trick [Wed, 8 Aug 2012 02:44:16 +0000 (02:44 +0000)]
Added MispredictPenalty to SchedMachineModel.

This replaces an existing subtarget hook on ARM and allows standard
CodeGen passes to potentially use the property.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161471 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoMinor cleanup of defaultDefLatency API
Andrew Trick [Wed, 8 Aug 2012 02:44:11 +0000 (02:44 +0000)]
Minor cleanup of defaultDefLatency API

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161470 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agowhitespace
Andrew Trick [Wed, 8 Aug 2012 02:44:08 +0000 (02:44 +0000)]
whitespace

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161469 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoisAllocLikeFn is allowed to return true for functions which read memory; make
Eli Friedman [Wed, 8 Aug 2012 02:17:32 +0000 (02:17 +0000)]
isAllocLikeFn is allowed to return true for functions which read memory; make
sure we account for that correctly in DeadStoreElimination.  Fixes a regression
from r158919.  PR13547.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161468 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoRevert "Fix a quadratic algorithm in MachineBranchProbabilityInfo."
Jakob Stoklund Olesen [Wed, 8 Aug 2012 01:10:31 +0000 (01:10 +0000)]
Revert "Fix a quadratic algorithm in MachineBranchProbabilityInfo."

It caused an assertion failure when compiling consumer-typeset.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161463 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoX86: enable CSE between CMP and SUB
Manman Ren [Wed, 8 Aug 2012 00:51:41 +0000 (00:51 +0000)]
X86: enable CSE between CMP and SUB

We perform the following:
1> Use SUB instead of CMP for i8,i16,i32 and i64 in ISel lowering.
2> Modify MachineCSE to correctly handle implicit defs.
3> Convert SUB back to CMP if possible at peephole.

Removed pattern matching of (a>b) ? (a-b):0 and like, since they are handled
by peephole now.

rdar://11873276

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161462 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoDon't scan physreg use-def chains looking for a PIC base.
Jakob Stoklund Olesen [Wed, 8 Aug 2012 00:40:47 +0000 (00:40 +0000)]
Don't scan physreg use-def chains looking for a PIC base.

We can't rematerialize a PIC base after register allocation anyway, and
scanning physreg use-def chains is very expensive in a function with
many calls.

<rdar://problem/12047515>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161461 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFix a quadratic algorithm in MachineBranchProbabilityInfo.
Jakob Stoklund Olesen [Wed, 8 Aug 2012 00:20:37 +0000 (00:20 +0000)]
Fix a quadratic algorithm in MachineBranchProbabilityInfo.

The getSumForBlock function was quadratic in the number of successors
because getSuccWeight would perform a linear search for an already known
iterator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161460 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAvoid recomputing the unique exit blocks and their insert points when doing
Dan Gohman [Wed, 8 Aug 2012 00:00:26 +0000 (00:00 +0000)]
Avoid recomputing the unique exit blocks and their insert points when doing
multiple scalar promotions on a single loop. This also has the effect of
preserving the order of stores sunk out of loops, which is aesthetically
pleasing, and it happens to fix the testcase in PR13542, though it doesn't
fix the underlying problem.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161459 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoSkip tied operand pairs that already have the same register.
Jakob Stoklund Olesen [Tue, 7 Aug 2012 22:47:06 +0000 (22:47 +0000)]
Skip tied operand pairs that already have the same register.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161454 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd SelectionDAG::getTargetIndex.
Jakob Stoklund Olesen [Tue, 7 Aug 2012 22:37:05 +0000 (22:37 +0000)]
Add SelectionDAG::getTargetIndex.

This adds support for TargetIndex operands during isel. The meaning of
these (index, offset, flags) operands is entirely defined by the target.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161453 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFix a serious typo in InstCombine's optimization of comparisons.
Bob Wilson [Tue, 7 Aug 2012 22:35:16 +0000 (22:35 +0000)]
Fix a serious typo in InstCombine's optimization of comparisons.

An unsigned value converted to floating-point will always be greater than
a negative constant.  Unfortunately InstCombine reversed the check so that
unsigned values were being optimized to always be greater than all positive
floating-point constants.  <rdar://problem/12029145>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161452 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoX86 cmp lowering is looking past truncate on the condition node. It should only
Evan Cheng [Tue, 7 Aug 2012 22:21:00 +0000 (22:21 +0000)]
X86 cmp lowering is looking past truncate on the condition node. It should only
do so when the high bits are known zero. This caused a subtle miscompilation.

rdar://12027825

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161451 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFor non-Darwin platforms, we want to generate stack protectors only for
Bill Wendling [Tue, 7 Aug 2012 20:59:05 +0000 (20:59 +0000)]
For non-Darwin platforms, we want to generate stack protectors only for
character arrays. This is in line with what GCC does.
<rdar://problem/10529227>

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161446 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd a new kind of MachineOperand: MO_TargetIndex.
Jakob Stoklund Olesen [Tue, 7 Aug 2012 18:56:39 +0000 (18:56 +0000)]
Add a new kind of MachineOperand: MO_TargetIndex.

A target index operand looks a lot like a constant pool reference, but
it is completely target-defined. It contains the 8-bit TargetFlags, a
32-bit index, and a 64-bit offset. It is preserved by all code generator
passes.

TargetIndex operands can be used to carry target-specific information in
cases where immediate operands won't suffice.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161441 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoEnable lazy compilation in MCJIT
Andrew Kaylor [Tue, 7 Aug 2012 18:33:00 +0000 (18:33 +0000)]
Enable lazy compilation in MCJIT

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161438 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFix a couple of typos.
Jakob Stoklund Olesen [Tue, 7 Aug 2012 18:32:57 +0000 (18:32 +0000)]
Fix a couple of typos.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161437 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoRemove empty directory.
Eli Friedman [Tue, 7 Aug 2012 18:06:01 +0000 (18:06 +0000)]
Remove empty directory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161434 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd trace accessor methods, implement primitive if-conversion heuristic.
Jakob Stoklund Olesen [Tue, 7 Aug 2012 18:02:19 +0000 (18:02 +0000)]
Add trace accessor methods, implement primitive if-conversion heuristic.

Compare the critical paths of the two traces through an if-conversion
candidate. If the difference is larger than the branch brediction
penalty, reject the if-conversion. If would never pay.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161433 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoTidy up a bit.
Jim Grosbach [Tue, 7 Aug 2012 17:53:14 +0000 (17:53 +0000)]
Tidy up a bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161430 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoThe dominance computation already has logic for computing if an edge dominates
Rafael Espindola [Tue, 7 Aug 2012 17:30:46 +0000 (17:30 +0000)]
The dominance computation already has logic for computing if an edge dominates
a use or a BB, but it is inline in the handling of the invoke instruction.

This patch refactors it so that it can be used in other cases. For example, in

define i32 @f(i32 %x) {
bb0:
  %cmp = icmp eq i32 %x, 0
  br i1 %cmp, label %bb2, label %bb1
bb1:
  br label %bb2
bb2:
  %cond = phi i32 [ %x, %bb0 ], [ 0, %bb1 ]
  %foo = add i32 %cond, %x
  ret i32 %foo
}

GVN should be able to replace %x with 0 in any use that is dominated by the
true edge out of bb0. In the above example the only such use is the one in
the phi.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161429 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd a comment about mftb vs. mfspr on PPC.
Hal Finkel [Tue, 7 Aug 2012 17:04:20 +0000 (17:04 +0000)]
Add a comment about mftb vs. mfspr on PPC.

Thanks to Alex Rosenberg for the suggestion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161428 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFix the representation of debug line table in DebugInfo LLVM library,
Alexey Samsonov [Tue, 7 Aug 2012 11:46:57 +0000 (11:46 +0000)]
Fix the representation of debug line table in DebugInfo LLVM library,
and "instruction address -> file/line" lookup.

Instead of plain collection of rows, debug line table for compilation unit is now
treated as the number of row ranges, describing sequences (series of contiguous machine
instructions). The sequences are not always listed in the order of increasing
address, so previously used std::lower_bound() sometimes produced wrong results.
Now the instruction address lookup consists of two stages: finding the correct
sequence, and searching for address in range of rows for this sequence.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161414 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoPR13095: Give an inline cost bonus to functions using byval arguments.
Benjamin Kramer [Tue, 7 Aug 2012 11:13:19 +0000 (11:13 +0000)]
PR13095: Give an inline cost bonus to functions using byval arguments.

We give a bonus for every argument because the argument setup is not needed
anymore when the function is inlined. With this patch we interpret byval
arguments as a compact representation of many arguments. The byval argument
setup is implemented in the backend as an inline memcpy, so to model the
cost as accurately as possible we take the number of pointer-sized elements
in the byval argument and give a bonus of 2 instructions for every one of
those. The bonus is capped at 8 elements, which is the number of stores
at which the x86 backend switches from an expanded inline memcpy to a real
memcpy. It would be better to use the real memcpy threshold from the backend,
but it's not available via TargetData.

This change brings the performance of c-ray in line with gcc 4.7. The included
test case tries to reproduce the c-ray problem to catch regressions for this
benchmark early, its performance is dominated by the inline decision of a
specific call.

This only has a small impact on most code, more on x86 and arm than on x86_64
due to the way the ABI works. When building LLVM for x86 it gives a small
inline cost boost to virtually any function using StringRef or STL allocators,
but only a 0.01% increase in overall binary size. The size of gcc compiled by
clang actually shrunk by a couple bytes with this patch applied, but not
significantly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161413 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoFix PR13412, a nasty miscompile due to the interleaved
Chandler Carruth [Tue, 7 Aug 2012 10:59:59 +0000 (10:59 +0000)]
Fix PR13412, a nasty miscompile due to the interleaved
instsimplify+inline strategy.

The crux of the problem is that instsimplify was reasonably relying on
an invariant that is true within any single function, but is no longer
true mid-inline the way we use it. This invariant is that an argument
pointer != a local (alloca) pointer.

The fix is really light weight though, and allows instsimplify to be
resiliant to these situations: when checking the relation ships to
function arguments, ensure that the argumets come from the same
function. If they come from different functions, then none of these
assumptions hold. All credit to Benjamin Kramer for coming up with this
clever solution to the problem.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161410 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoAdd a much more conservative strategy for aligning branch targets.
Chandler Carruth [Tue, 7 Aug 2012 09:45:24 +0000 (09:45 +0000)]
Add a much more conservative strategy for aligning branch targets.
Previously, MBP essentially aligned every branch target it could. This
bloats code quite a bit, especially non-looping code which has no real
reason to prefer aligned branch targets so heavily.

As Andy said in review, it's still a bit odd to do this without a real
cost model, but this at least has much more plausible heuristics.

Fixes PR13265.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161409 91177308-0d34-0410-b5e6-96231b3b80d8

12 years agoMachineCSE: Update the heuristics for isProfitableToCSE.
Manman Ren [Tue, 7 Aug 2012 06:16:46 +0000 (06:16 +0000)]
MachineCSE: Update the heuristics for isProfitableToCSE.

If the result of a common subexpression is used at all uses of the candidate
expression, CSE should not increase the live range of the common subexpression.

rdar://11393714 and rdar://11819721

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161396 91177308-0d34-0410-b5e6-96231b3b80d8