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Author SHA1 Message Date
Jakob Stoklund Olesen
ec7e4fff96 When a physreg is live-in and live through a basic block, make sure its live 
range covers the entire block.

The live range can't be terminated at a random instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130619 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 19:12:33 +00:00
Benjamin Kramer
7d6eb5a018 InstCombine: Turn (zext A) udiv (zext B) into (zext (A udiv B)). Same for urem or constant B. 
This obviously helps a lot if the division would be turned into a libcall
(think i64 udiv on i386), but div is also one of the few remaining instructions
on modern CPUs that become more expensive when the bitwidth gets bigger.

This also helps register pressure on i386 when dividing chars, divb needs
two 8-bit parts of a 16 bit register as input where divl uses two registers.

int foo(unsigned char a) { return a/10; }
int bar(unsigned char a, unsigned char b) { return a/b; }

compiles into (x86_64)
_foo:
  imull $205, %edi, %eax
  shrl  $11, %eax
  ret
_bar:
  movzbl        %dil, %eax
  divb  %sil, %al
  movzbl        %al, %eax
  ret

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130615 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 18:16:07 +00:00
Benjamin Kramer
23b02cd031 Use SimplifyDemandedBits on div instructions. 
This folds away silly stuff like (a&255)/1000 -> 0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130614 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 18:16:00 +00:00
Benjamin Kramer
2f8e038b35 FileCheckize. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130613 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 18:15:53 +00:00
Rafael Espindola
277abc8172 Implement MCAsmStreamer::EmitEHSymAttributes. Doing this in the asm streamer 
is a bit ugly, but doing it on the base MCStreamer would be redundant
with the object streamer which does it using SD.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130611 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 16:34:57 +00:00
Rafael Espindola
97f7f4e43d Handle PrivateExtern eh symbols. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130609 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 16:22:46 +00:00
Jakob Stoklund Olesen
8e1e4cf226 Allow folded spills in test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130599 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 08:00:50 +00:00
Jakob Stoklund Olesen
6ee56e658a Avoid using stale entries form the sibling value map. 
This could happen when trying to use a value that had been eliminated after dead
code elimination and folding loads.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130597 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 06:42:21 +00:00
Jakob Stoklund Olesen
66446c803a Use hysteresis for local live range splitting as well. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130596 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 05:07:46 +00:00
NAKAMURA Takumi
4f5558e676 runtime/libprofile/PathProfiling.c: Don't use // comment in C source. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130589 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 03:53:56 +00:00
Rafael Espindola
f1a5c7ec04 Add all the plumbing needed for MC to expand cfi to the old tables in 
the final assembly. It is the same technique used when targeting
assemblers that don't support .loc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130587 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 03:44:37 +00:00
Rafael Espindola
a37bd1d02c Implement MCAsmStreamer::EmitDwarfAdvanceFrameAddr. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130585 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 03:21:04 +00:00
Jakob Stoklund Olesen
141f529baf Update comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130582 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 03:13:08 +00:00
Jakob Stoklund Olesen
5aa3211e2d Use a greedy algorithm for allocating registers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130568 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 01:37:54 +00:00
Jakob Stoklund Olesen
d5b679c8ce Weekly fix of register allocation dependent unit tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130567 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-30 01:37:52 +00:00
Bill Wendling
d65ba721cc Print out the 'nontemporal' info on a store. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130562 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 23:45:22 +00:00
Eli Friedman
b2b03fc2fa Make FastEmit_ri_ try a bit harder to succeed for supported operations; FastEmit_i can fail for non-Thumb2 ARM. Makes ARMSimplifyAddress work correctly, and reduces the number of fast-isel bailouts on non-Thumb ARM. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130560 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 23:34:52 +00:00
Eric Christopher
5ac179ccd2 80-col. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130558 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 23:12:01 +00:00
Eli Friedman
b451770b26 Zap a couple now-unused functions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130557 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 22:56:48 +00:00
Eli Friedman
c573e2c7ea Switch to ImmLeaf (which can be used by FastISel) for a few more common ARM/Thumb2 patterns. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130552 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 22:48:03 +00:00
Devang Patel
40348e8d1f Assing line number info to new PHIs created by SSA updater. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130551 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 22:28:59 +00:00
Eric Christopher
d94bc549fc Add FastEmitInst_ii for the arm fast isel generator. It doesn't use it, but 
if it ever did it needs the def machinery.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130549 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 22:07:50 +00:00
Eli Friedman
206a10cf28 Filter out pattterns from the FastISel emitter which it doesn't actually know how to handle. No significant functionality change at the moment, but it's necessary for some changes I'm planning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130547 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 21:58:31 +00:00
Eric Christopher
632ae892e6 Some cleanup and optimize fallthrough more. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130546 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 21:56:31 +00:00
Rafael Espindola
1f6c87554a Avoid some uses of .uleb128. This is a small speedup and more importantly 
lets this code be used when producing assembly code for old assemblers without
uleb support.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130544 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 21:50:57 +00:00
Rafael Espindola
7f46b08082 Implement MCAsmStreamer::EmitCFIDefCfa. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130543 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 21:41:06 +00:00
Devang Patel
0b2fb39d8d Print new instructions without DebugLoc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130542 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 21:36:04 +00:00
Eli Friedman
51864a1d2b Fix run-line, again. :( 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130540 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 21:33:03 +00:00
Eli Friedman
9ebf57ae13 Re-committing r130454, which does not in fact break anything. 
Fix a rather obscure crash caused by ARM fast-isel generating code which redefines a register.
rdar://problem/9338332 .



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130539 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 21:22:56 +00:00
Devang Patel
bd5426a4f2 Preserve line number information. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130536 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 20:38:55 +00:00
Eric Christopher
bcf26aee86 Add trunc->branch support, this won't help with clang's i8->i1 truncations 
for bools, but is a start.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130534 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 20:02:39 +00:00
Daniel Dunbar
8ddf6f2952 win32: Include DataTypes.h instead of stdint.h to try and fix a Win32 build 
issue.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130530 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:58:57 +00:00
Daniel Dunbar
c69c4a839f Cleanup some DOS newlines. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130529 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:58:55 +00:00
Peter Collingbourne
57808b3da0 SimplifyCFG: Expose phi node folding cost threshold as command line parameter 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130528 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:47:38 +00:00
Peter Collingbourne
f15907fead SimplifyCFG: Add CostRemaining parameter to DominatesMergePoint 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130527 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:47:31 +00:00
Peter Collingbourne
8a70192b51 SimplifyCFG: Add Trunc, ZExt and SExt to the list of cheap instructions for phi node folding 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130526 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:47:25 +00:00
Daniel Dunbar
c8497b6a25 MCAsmLayout: Add support for computing the symbol offset of variables. Not 
currently used, because variables don't get reported as being "defined".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130524 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:20:20 +00:00
Daniel Dunbar
90604ab725 MC: Change variable symbols to be recognized as defined, by assigning their sections based on FindAssociatedSection(). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130523 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:20:17 +00:00
Daniel Dunbar
173aa9ce32 MC/Mach-O: Update getSymbolAddress() to support evaluation of variables. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130522 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:13:42 +00:00
Daniel Dunbar
5ff919b324 MC/Mach-O: Allow emission of relocations for variables in some more cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130520 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:10:47 +00:00
Daniel Dunbar
08b9935b51 MC/Mach-O: Find section ordinal's by looking at the symbol, instead of assuming they are present in a fragment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130519 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:07:43 +00:00
Devang Patel
49a3ff9d17 Hoist MCLineEntry construction AsmPrinter so that anyone who derives from AsmPrinter can have line number entries. 
PR 9810



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130518 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:00:54 +00:00
Daniel Dunbar
0eab5c4d85 MCExpr: Add FindAssociatedSection, which attempts to mirror the 'as' semantics 
that associate sections with expressions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130517 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 18:00:03 +00:00
Daniel Dunbar
6db7fe8736 MC/AsmParser: Generalize a check. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130515 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 17:53:11 +00:00
Douglas Gregor
c003229ddc Fix a C++0x portability issue with std::make_pair. Explicitly providing template arguments no longer works when the call arguments are lvalues. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130513 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 16:57:12 +00:00
Douglas Gregor
72d30f6950 Include <pthread.h> before we use pthread_self/pthread_kill 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130510 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 16:12:17 +00:00
Rafael Espindola
ac3ba1b27e The last hack for producing bit identical output with cfi on OS X. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130504 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 15:09:53 +00:00
Rafael Espindola
7b11a4cbdc Change DwarfCFIException's member variables to track what it actually 
emmits: .cfi_personality, .cfi_lsda and the moves.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130503 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 14:48:51 +00:00
Andrew Trick
d49ffe8284 Teach Thumb2 isel to fold and->rotr ==> ROR. 
Generalization of Nate Begeman's patch!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130502 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 14:18:15 +00:00
Rafael Espindola
a432997745 Factor some code to needsCFIMoves. Avoid printing moves when we don't have to. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130501 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-04-29 14:14:06 +00:00