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11824 Commits

Author SHA1 Message Date
Devang Patel
84b64a3e92 Remove unused statistical counter. 
llvm-svn: 132087
 2011-05-25 21:55:40 +00:00
Rafael Espindola
fc9bae6f8b Replace the -unwind-tables option with a per function flag. This is more 
LTO friendly as we can now correctly merge files compiled with or without
-fasynchronous-unwind-tables.

llvm-svn: 132033
 2011-05-25 03:44:17 +00:00
Devang Patel
5de2375db8 Remove dead code. 
llvm-svn: 131974
 2011-05-24 18:27:52 +00:00
Rafael Espindola
0d018b1155 Explain FIXME. 
llvm-svn: 131952
 2011-05-24 03:10:31 +00:00
Rafael Espindola
0f33be1b87 Fix the defaults for .eh_frame. We were marking it as writable. 
llvm-svn: 131951
 2011-05-24 02:50:20 +00:00
Evan Cheng
88f9137fd7 - Teach SelectionDAG::isKnownNeverZero to return true (op x, c) when c is 
non-zero.
- Teach X86 cmov optimization to eliminate the cmov from ctlz, cttz extension
  when the source of X86ISD::BSR / X86ISD::BSF is proven to be non-zero.

rdar://9490949

llvm-svn: 131948
 2011-05-24 01:48:22 +00:00
Devang Patel
354fa0798f Fix debug info for blocks' variable. 
llvm-svn: 131940
 2011-05-24 00:22:25 +00:00
Devang Patel
faaa16ea2c Remove unnecessary comment. 
llvm-svn: 131936
 2011-05-23 23:16:14 +00:00
Devang Patel
efec7715ec Revert 121907 (it causes llc crash) and apply original patch from PR9817. 
llvm-svn: 131926
 2011-05-23 22:04:42 +00:00
Devang Patel
7992883811 Preserve debug info during iSel by keeping DanglingDebugInfoMap live until end of function. 
Patch by Micah Villmow

llvm-svn: 131908
 2011-05-23 17:44:13 +00:00
Devang Patel
c4d9a84159 While replacing all uses of a SDValue with another value, do not forget to transfer SDDbgValue. 
llvm-svn: 131907
 2011-05-23 17:35:08 +00:00
Chris Lattner
68254fcbca Eliminate some temporary variables, and don't call getByValTypeAlignment 
when we're just going to throw the result away.  No functionality change.

llvm-svn: 131880
 2011-05-22 23:23:02 +00:00
Chris Lattner
04120e9567 eliminate dependence on StandardPasses.h. The code generator's pass pipeline 
should eventually convert to PMBuilder, but I don't plan to do this.

llvm-svn: 131819
 2011-05-22 00:13:44 +00:00
Benjamin Kramer
2fd48f2730 Implement mulo x, 2 -> addo x, x in DAGCombiner. 
llvm-svn: 131800
 2011-05-21 18:31:55 +00:00
Cameron Zwarich
d7ee0fcac9 Fix PR9962 by properly constraining register classes in RemoveCopyByCommutingDef(). This 
actually fixes most of the VerifyCoalescing failures in test-suite.

llvm-svn: 131768
 2011-05-20 23:25:36 +00:00
Charles Davis
1a1d4777b9 Fix typo. When will I learn? 
llvm-svn: 131765
 2011-05-20 22:23:34 +00:00
Charles Davis
bc1feb1f25 Add .pdata and .xdata sections to the COFF TLOF implementation. 
llvm-svn: 131763
 2011-05-20 22:13:55 +00:00
Jim Grosbach
8aded86edb No reason not to allow defining the CFA as a reg w/ offset zero. 
llvm-svn: 131760
 2011-05-20 21:50:09 +00:00
Jim Grosbach
17c1d13ee4 Fix typo. 
llvm-svn: 131757
 2011-05-20 21:35:39 +00:00
Jim Grosbach
83c4bb157a Add support for frame info use of the .cfi_def_cfa directive. 
llvm-svn: 131756
 2011-05-20 21:23:17 +00:00
Cameron Zwarich
e0a52df6e5 Fix PR9960 by teaching SimpleRegisterCoalescing::AdjustCopiesBackFrom() to preserve 
the phikill flag.

llvm-svn: 131717
 2011-05-20 03:54:04 +00:00
Cameron Zwarich
2af60abad8 Fix PR9955 by only attaching load memory operands to load instructions and 
similarly for stores. Now "make check" passes with the MachineVerifier forced
on with the VerifyCoalescing option!

llvm-svn: 131705
 2011-05-19 23:44:34 +00:00
Stuart Hastings
4a4e5a2b55 Update some currently-disabled code, preparing for eventual use. 
llvm-svn: 131663
 2011-05-19 18:48:20 +00:00
Cameron Zwarich
fe5795a1f6 Revert r128961 because it didn't include a test and causes the verifier to fail 
on CodeGen/X86/2007-05-07-InvokeSRet.ll. There is probably a bug here that was
fixed by r128961, but since there is no test or reference to a source file I have
to revert it.

llvm-svn: 131618
 2011-05-19 01:56:19 +00:00
Duncan Sands
3d9407f4eb Revert commit 131534 since it seems to have broken several buildbots. 
Original log entry:
Refactor getActionType and getTypeToTransformTo ; place all of the 'decision'
code in one place.

llvm-svn: 131536
 2011-05-18 14:57:56 +00:00
Nadav Rotem
c5c27ede55 Refactor getActionType and getTypeToTransformTo ; place all of the 'decision' 
code in one place.

llvm-svn: 131534
 2011-05-18 12:26:38 +00:00
Jakob Stoklund Olesen
07b5c276f4 Eliminate dead dead code elimination code. 
llvm-svn: 131524
 2011-05-18 04:51:15 +00:00
Jakob Stoklund Olesen
f3dc225972 Also use shrinkToUses after AdjustCopiesBackFrom(). 
The 'last use' may not be in the same basic block, and we still want a correct
live range.

llvm-svn: 131523
 2011-05-18 04:51:12 +00:00
Jakob Stoklund Olesen
595a47d462 Properly shrink live ranges after deleting dead copies. Clean up after all joined copies. 
LiveInterval::shrinkToUses recomputes the live range from scratch instead of
removing snippets. This should avoid the problem with dangling live ranges.

Leave physreg identity copies alone. They can be created when joining a virtreg
with a physreg. They don't affect register allocation, and they will be removed
by the rewriter.

llvm-svn: 131521
 2011-05-18 04:18:19 +00:00
Eli Friedman
e9692808b7 Make fast-isel miss counting in -stats and -fast-isel-verbose take terminators into account; since there are many fewer isel misses with recent changes, misses caused by terminators are more significant. 
llvm-svn: 131502
 2011-05-17 23:02:10 +00:00
Dan Gohman
abffc991dc Misc. code cleanups. 
llvm-svn: 131497
 2011-05-17 22:22:52 +00:00
Dan Gohman
4298df6d86 Misc. code cleanups. 
llvm-svn: 131495
 2011-05-17 22:20:36 +00:00
Stuart Hastings
c65d8eda7b Revert 131467 due to buildbot complaint. 
llvm-svn: 131469
 2011-05-17 16:59:46 +00:00
Stuart Hastings
3cf5308890 Fix an obscure issue in X86_64 parameter passing: if a tiny byval is 
passed as the fifth parameter, insure it's passed correctly (in R9).
rdar://problem/6920088

llvm-svn: 131467
 2011-05-17 16:45:55 +00:00
Jakob Stoklund Olesen
52375e6a01 Tweak cross-class coalescing to be more aggressive when the target class is small. 
The greedy register allocator has live range splitting and register class
inflation, so it can actually fully undo this join, including restoring the
original register classes.

We still don't want to do this for long live ranges, mostly because of the high
register pressure of there are many constrained live ranges overlapping.

llvm-svn: 131466
 2011-05-17 16:38:37 +00:00
Jakob Stoklund Olesen
4edf17d91f Teach LiveInterval::isZeroLength about null SlotIndexes. 
When instructions are deleted, they leave tombstone SlotIndex entries.
The isZeroLength method should ignore these null indexes.

This causes RABasic to sometimes spill a callee-saved register in the
abi-isel.ll test, so don't run that test with -regalloc=basic.  Prioritizing
register allocation according to spill weight can cause more registers to be
used.

llvm-svn: 131436
 2011-05-16 23:50:05 +00:00
Dan Gohman
d282f46c6b Delete unused variables. 
llvm-svn: 131430
 2011-05-16 22:19:54 +00:00
Dan Gohman
d4d12d14b5 Trim #includes. 
llvm-svn: 131429
 2011-05-16 22:14:50 +00:00
Dan Gohman
ae9b1685a8 Fix whitespace and 80-column violations. 
llvm-svn: 131428
 2011-05-16 22:09:53 +00:00
Jim Grosbach
e85c0dde7a Track how many insns fast-isel successfully selects as well as how many it 
misses.

llvm-svn: 131426
 2011-05-16 21:51:07 +00:00
Devang Patel
8e60ff11db Preserve debug info for unused zero extended boolean argument. 
Radar 9422775.

llvm-svn: 131422
 2011-05-16 21:24:05 +00:00
Eli Friedman
a4d4a0162d Make fast-isel work correctly s/uadd.with.overflow intrinsics. 
llvm-svn: 131420
 2011-05-16 21:06:17 +00:00
Eli Friedman
4c08bb450a Fix silly typo. 
llvm-svn: 131419
 2011-05-16 20:34:53 +00:00
Eli Friedman
9ac944774f Basic fast-isel of extractvalue. Not too helpful on its own, given the IR clang generates for cases like this, but it should become more useful soon. 
llvm-svn: 131417
 2011-05-16 20:27:46 +00:00
Rafael Espindola
2050af838d Don't do tail calls in a function that call setjmp. The stack might be 
corrupted when setjmp returns again.

llvm-svn: 131399
 2011-05-16 03:05:33 +00:00
Eli Friedman
8f1e11cde9 Fix a FIXME by moving the fast-isel implementation of the objectsize intrinsic from the x86 code to the generic code. 
llvm-svn: 131332
 2011-05-14 00:47:51 +00:00
Rafael Espindola
e53b7d1a11 Make codegen able to handle values of empty types. This is one way 
to fix PR9900. I will keep it open until sable is able to comment on it.

llvm-svn: 131294
 2011-05-13 15:18:06 +00:00
Stuart Hastings
aa02c0847d Since I can't reproduce the failures from 131261, re-trying with a 
simplified version.  <rdar://problem/9298790>

llvm-svn: 131274
 2011-05-13 00:51:54 +00:00
Stuart Hastings
8d57d8ea64 Revert 131266 and 131261 due to buildbot complaints. 
rdar://problem/9298790

llvm-svn: 131269
 2011-05-13 00:15:17 +00:00
Stuart Hastings
89f1b47e3a Non-fast-isel followup to 129634; correctly handle branches controlled 
by non-CMP expressions.  The executable test case (129821) would test
this as well, if we had an "-O0 -disable-arm-fast-isel" LLVM-GCC
tester.  Alas, the ARM assembly would be very difficult to check with
FileCheck.

The thumb2-cbnz.ll test is affected; it generates larger code (tst.w
vs. cmp #0), but I believe the new version is correct.
rdar://problem/9298790

llvm-svn: 131261
 2011-05-12 23:36:41 +00:00