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Author SHA1 Message Date
Devang Patel
791327d23b Clear list of instructions without DebugLoc. 
llvm-svn: 131906
 2011-05-23 17:34:18 +00:00
Duncan Sands
9f313fa916 The dragonegg option to disable LLVM optimizations changed. 
llvm-svn: 131903
 2011-05-23 16:50:29 +00:00
Charles Davis
b38506e3a7 Implement .seh_stackalloc and .seh_pushframe parsing. 
I haven't implemented any of the ones that take registers yet. The problem is
that for x86-64 the streamer methods expect a native x86 register number (note:
%r8-%r15 want 8-15 instead of 0-7; same for %xmm8-%xmm15). I haven't figured
out exactly how I want to do that yet.

llvm-svn: 131899
 2011-05-23 16:43:09 +00:00
Chris Lattner
c64a4d1170 fix a really nasty basicaa mod/ref calculation bug that was causing miscompilation of 
UnitTests/ObjC/messages-2.m with the recent optimizer improvements.

llvm-svn: 131897
 2011-05-23 05:15:43 +00:00
Cameron Zwarich
5a416bda73 Fix <rdar://problem/9476260> by having tail calls always generate 32-bit branches 
in Darwin Thumb2 code. Tail calls are already disabled on Thumb1.

llvm-svn: 131894
 2011-05-23 01:57:17 +00:00
Chris Lattner
bee56202ba rearrange two transforms, since one subsumes the other. Make the shift-exactness 
xform recurse.

llvm-svn: 131888
 2011-05-23 00:32:19 +00:00
Chris Lattner
ec35f49b3e Transform any logical shift of a power of two into an exact/NUW shift when 
in a known-non-zero context.

llvm-svn: 131887
 2011-05-23 00:21:50 +00:00
Bill Wendling
6f30676150 Use a more efficient data structure for the "operand map". The number of 
operands to an instruction aren't great, so an iterative search is fairly quick
and doesn't have the overhead of std::map.

llvm-svn: 131886
 2011-05-23 00:18:33 +00:00
Chris Lattner
498f516575 use the valuetracking isPowerOfTwo function, which is more powerful than checking 
for a constant directly.  Thanks to Duncan for pointing this out.

llvm-svn: 131885
 2011-05-23 00:09:55 +00:00
Chris Lattner
c277b19e97 Teach valuetracking that byval arguments with a specified alignment are 
aligned.

Teach memcpyopt to not give up all hope when confonted with an underaligned
memcpy feeding an overaligned byval.  If the *source* of the memcpy can be
determined to be adequeately aligned, or if it can be forced to be, we can
eliminate the memcpy.

This addresses PR9794.  We now compile the example into:

define i32 @f(%struct.p* nocapture byval align 8 %q) nounwind ssp {
entry:
  %call = call i32 @g(%struct.p* byval align 8 %q) nounwind
  ret i32 %call
}

in both x86-64 and x86-32 mode.  We still don't get a tailcall though,
because tailcalls apparently can't handle byval.

llvm-svn: 131884
 2011-05-23 00:03:39 +00:00
Chris Lattner
5fd8380a35 add a helper method to get the byval alignment of an argument. 
llvm-svn: 131883
 2011-05-22 23:57:23 +00:00
Chris Lattner
ca9723d80b 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
859ce35115 add test from PR9164 
llvm-svn: 131876
 2011-05-22 22:35:34 +00:00
Chris Lattner
009caa6b41 testcase for PR9378 
llvm-svn: 131875
 2011-05-22 22:32:53 +00:00
Chris Lattner
5442c034a8 add a missing alias to make us more bug compatible with gcc, PR9378 
llvm-svn: 131874
 2011-05-22 22:31:57 +00:00
Chris Lattner
9275a4413b document thiscall, PR9101 
llvm-svn: 131873
 2011-05-22 22:28:47 +00:00
Chris Lattner
78663aa9f5 implement PR9315, constant folding exp2 in terms of pow (since hosts without 
C99 runtimes don't have exp2).

llvm-svn: 131872
 2011-05-22 22:22:35 +00:00
Renato Golin
759db3cbe3 RTABI chapter 4.3.4 specifies __eabi_mem* calls. Specifically, __eabi_memset accepts parameters (ptr, size, value) in a different order than GNU's memset (ptr, value, size), therefore the special lowering in AAPCS mode. Implementation by Evzen Muller. 
llvm-svn: 131868
 2011-05-22 21:41:23 +00:00
Charles Davis
a4187a96c9 Add methods to parse the SEH directives to the COFFAsmParser. Implement some 
of them, particularly the ones that don't take arguments. Also implement
.seh_proc and .seh_handler.

llvm-svn: 131866
 2011-05-22 21:12:15 +00:00
Chris Lattner
3066a7e5ad add a note. 
llvm-svn: 131863
 2011-05-22 18:28:46 +00:00
Chris Lattner
84f101ea45 add some random notes. 
llvm-svn: 131862
 2011-05-22 18:26:48 +00:00
Evan Cheng
a2e8770368 Teach ValueTracking about x86 crc32 intrinsics. 
llvm-svn: 131861
 2011-05-22 18:25:30 +00:00
Chris Lattner
8ed794f599 Carve out a place in instcombine to put transformations which work knowing that their 
result is non-zero.  Implement an example optimization (PR9814), which allows us to
transform:
  A / ((1 << B) >>u 2)
into:
  A >>u (B-2)

which we compile into:

_divu3:                                 ## @divu3
	leal	-2(%rsi), %ecx
	shrl	%cl, %edi
	movl	%edi, %eax
	ret

instead of:

_divu3:                                 ## @divu3
	movb	%sil, %cl
	movl	$1, %esi
	shll	%cl, %esi
	shrl	$2, %esi
	movl	%edi, %eax
	xorl	%edx, %edx
	divl	%esi, %eax
	ret

llvm-svn: 131860
 2011-05-22 18:18:41 +00:00
Johnny Chen
6e8aeaa2f4 Fix Bug 9386 - ARM disassembler failed to disassemble conditional bx 
Modified the patch to .td file supplied by Jyun-Yan You.  Add a test case and
modified ARMDisassemblerCore.cpp a little bit.

llvm-svn: 131859
 2011-05-22 17:51:04 +00:00
Chris Lattner
44516c3ba3 Fix PR9815: I was trying to get out of "generating code and then 
failing to form a memset, then having to delete it" but my approximation
isn't safe for self recurrent loops.  Instead of doign a hack, just
do it the right way.

llvm-svn: 131858
 2011-05-22 17:39:56 +00:00
Frits van Bommel
df58ece78a Add a parameter to ConstantFoldTerminator() that callers can use to ask it to also clean up the condition of any conditional terminator it folds to be unconditional, if that turns the condition into dead code. This just means it calls RecursivelyDeleteTriviallyDeadInstructions() in strategic spots. It defaults to the old behavior. 
I also changed -simplifycfg, -jump-threading and -codegenprepare to use this to produce slightly better code without any extra cleanup passes (AFAICT this was the only place in -simplifycfg where now-dead conditions of replaced terminators weren't being cleaned up). The only other user of this function is -sccp, but I didn't read that thoroughly enough to figure out whether it might be holding pointers to instructions that could be deleted by this.

llvm-svn: 131855
 2011-05-22 16:24:18 +00:00
Chris Lattner
b2b8de15d8 another typo 
llvm-svn: 131854
 2011-05-22 15:44:02 +00:00
Chris Lattner
ddafd147a2 fix comment typo 
llvm-svn: 131853
 2011-05-22 15:34:37 +00:00
Chris Lattner
6830c25f35 I missed a checking with my GVN change. 
llvm-svn: 131851
 2011-05-22 07:20:02 +00:00
Chris Lattner
2be4296485 insertvalue takes a variable number of arguments, document this, fixing PR9935. 
llvm-svn: 131850
 2011-05-22 07:18:08 +00:00
Chris Lattner
98ce5cd957 fix PR9856, an incorrectly conservative assertion: a global can be 
"stored once" even if its address is compared.

llvm-svn: 131849
 2011-05-22 07:15:13 +00:00
Chris Lattner
6cce3b63ab fix PR9841 by having GVN not process dead loads. This was 
causing it to get into infinite loops when it would widen a 
load (which can necessarily leave around dead loads).

llvm-svn: 131847
 2011-05-22 07:03:34 +00:00
Chris Lattner
dcb6599980 remove a trivial test, make some other tests less trivial. 
llvm-svn: 131846
 2011-05-22 07:02:43 +00:00
Chris Lattner
ed5d5cc74d make this test less trivial. 
llvm-svn: 131845
 2011-05-22 06:59:33 +00:00
Chris Lattner
84d1d4b89c initialize and finalize function passes, pointed out by Cameron. 
llvm-svn: 131843
 2011-05-22 06:44:19 +00:00
Chris Lattner
75adf06d44 fix a bug for hosts without round, PR8893. 
llvm-svn: 131842
 2011-05-22 06:03:53 +00:00
Chris Lattner
9359dea740 move PR9408 here. 
llvm-svn: 131841
 2011-05-22 05:45:06 +00:00
Nick Lewycky
82ddea6aaa Commit test change, forgotten as part of r131838. 
llvm-svn: 131839
 2011-05-22 05:31:47 +00:00
Nick Lewycky
9f7644d549 Teach the inliner to emit llvm.lifetime.start/end, to scope the local variables 
of the inlinee to the code representing the original function.

llvm-svn: 131838
 2011-05-22 05:22:10 +00:00
Chris Lattner
7eb3367809 switch to using a smallvector to avoid allocations for most normal size instructions. 
llvm-svn: 131837
 2011-05-22 04:53:24 +00:00
Chris Lattner
b58a888c57 tidy some things up. 
llvm-svn: 131836
 2011-05-22 04:52:24 +00:00
Chris Lattner
1520c4f4f0 Fix some minor typos and grammar. 
llvm-svn: 131835
 2011-05-22 04:44:48 +00:00
Charles Davis
d74119d139 Implement emission of all Win64 exception tables. Make the COFF streamer emit 
these tables.

llvm-svn: 131833
 2011-05-22 04:15:07 +00:00
Charles Davis
c23700bb65 Make the COFF streamer emit unwind info when processing a .seh_handlerdata 
directive.

Implement emission of Win64 EH unwind info.

Pull in <cassert> in MCWin64EH.h so it can use the assert() macro.

llvm-svn: 131832
 2011-05-22 03:01:05 +00:00
Nick Lewycky
7cc4d86ea6 Fix grammar in test. 
llvm-svn: 131831
 2011-05-22 01:16:00 +00:00
Charles Davis
a537e589c9 Don't allow unaligned offsets and sizes in the Win64 EH directives. 
Also, fix threshold for 'Big' register saves.

llvm-svn: 131830
 2011-05-22 00:56:20 +00:00
Chris Lattner
69a52dd280 random comment cleanups. 
llvm-svn: 131829
 2011-05-22 00:50:53 +00:00
Chris Lattner
9413ffa53b fix a file system case sensitivity issue. 
llvm-svn: 131828
 2011-05-22 00:37:51 +00:00
Chris Lattner
03d83a7b9b remove StandardPasses, it has been replaced with PassManagerBuilder 
llvm-svn: 131827
 2011-05-22 00:30:45 +00:00
Chris Lattner
dd750b0404 switch opt to using PassManagerBuilder.h 
llvm-svn: 131824
 2011-05-22 00:21:33 +00:00