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Author SHA1 Message Date
Charles Davis
3ac82d9bb2 Add a method to TargetRegisterInfo to get the register number that the Win64 EH 
scheme uses internally. Implement it for x86 (the only architecture that LLVM
supports for which this matters right now).

llvm-svn: 131969
 2011-05-24 16:57:53 +00:00
Cameron Zwarich
e425894eaf Clean up the lazy initialization of DIBuilder a bit. 
llvm-svn: 131956
 2011-05-24 06:00:08 +00:00
Jakob Stoklund Olesen
222e83f44b Work around code generation bug in Visual Studio 2010. 
See http://llvm.org/pr9976 for details.

llvm-svn: 131954
 2011-05-24 03:20:56 +00:00
Cameron Zwarich
462b5db500 Make LoadAndStorePromoter preserve debug info and create llvm.dbg.values when 
promoting allocas to SSA variables. Fixes <rdar://problem/9479036>.

llvm-svn: 131953
 2011-05-24 03:10:43 +00:00
Rafael Espindola
8e44a53856 Explain FIXME. 
llvm-svn: 131952
 2011-05-24 03:10:31 +00:00
Rafael Espindola
176fe6a0e0 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
b5950697e8 - 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
Evan Cheng
e6e324363e Remove dead option. 
llvm-svn: 131947
 2011-05-24 01:43:38 +00:00
Andrew Trick
f3efa64b97 FileCheck-ize a couple of IV unit tests. 
llvm-svn: 131946
 2011-05-24 01:02:49 +00:00
Rafael Espindola
4e20425b24 Fix cmake dependencies. 
llvm-svn: 131943
 2011-05-24 00:58:06 +00:00
Akira Hatanaka
d0694fb652 Simplify offset calculation of stack frame objects for $gp restore location and 
variable arguments in LowerCall and LowerFormalArguments. This should also fix
the bug in which handling of variable arguments is incorrect when the front-end
optimizes away unused fixed arguments.

llvm-svn: 131942
 2011-05-24 00:23:52 +00:00
Devang Patel
5bce258c3d Fix debug info for blocks' variable. 
llvm-svn: 131940
 2011-05-24 00:22:25 +00:00
Andrew Trick
f346cb419d Test case for r130799 - indvars: Added canExpandBackEdgeTakenCount. 
llvm-svn: 131939
 2011-05-24 00:17:53 +00:00
Devang Patel
8a90970a54 Remove unnecessary comment. 
llvm-svn: 131936
 2011-05-23 23:16:14 +00:00
Akira Hatanaka
e2e584df0e Expand f64 FPOW. 
llvm-svn: 131928
 2011-05-23 22:23:58 +00:00
Akira Hatanaka
5b696387f7 Add pattern for double-to-integer conversion. Patch by Sasa Stankovic. 
llvm-svn: 131927
 2011-05-23 22:16:43 +00:00
Devang Patel
e829168e05 Revert 121907 (it causes llc crash) and apply original patch from PR9817. 
llvm-svn: 131926
 2011-05-23 22:04:42 +00:00
Akira Hatanaka
daa4afec69 Fixes related to coding style. 
llvm-svn: 131922
 2011-05-23 21:13:59 +00:00
Dan Gohman
3dd68e8eca Document llvm.exp and llvm.pow. 
llvm-svn: 131921
 2011-05-23 21:13:03 +00:00
Dan Gohman
e6a4a2aa6f When checking for signed multiplication overflow, watch out for INT_MIN and -1. 
This fixes PR9845.

llvm-svn: 131919
 2011-05-23 21:07:39 +00:00
Jim Grosbach
76f8f3d479 Propagate error correctly in the MC Asm parser for leading '$' expressions. 
llvm-svn: 131918
 2011-05-23 20:36:04 +00:00
Akira Hatanaka
123ee4388c Fix MipsAsmPrinter::printSavedRegsBitmaskChange. Remove functions and variables 
in MipsFunctionInfo that are no longer used.

llvm-svn: 131917
 2011-05-23 20:34:30 +00:00
Chris Lattner
f58c2c02b5 clarify this, apparently it is confusing :) 
llvm-svn: 131916
 2011-05-23 20:17:44 +00:00
Akira Hatanaka
6ddbe02441 Change StackDirection from StackGrowsUp to StackGrowsDown. 
The following improvements are accomplished as a result of applying this patch:
- Fixed frame objects' offsets (relative to either the virtual frame pointer or
  the stack pointer) are set before instruction selection is completed. There is
  no need to wait until Prologue/Epilogue Insertion is run to set them.
- Calculation of final offsets of fixed frame objects is straightforward. It is
  no longer necessary to assign negative offsets to fixed objects for incoming
  arguments in order to distinguish them from the others.
- Since a fixed object has its relative offset set during instruction
  selection, there is no need to conservatively set its alignment to 4.
- It is no longer necessary to reorder non-fixed frame objects in 
  MipsFrameLowering::adjustMipsStackFrame.

llvm-svn: 131915
 2011-05-23 20:16:59 +00:00
Devang Patel
ac809854cc Test case for r131908. 
llvm-svn: 131909
 2011-05-23 17:49:29 +00:00
Devang Patel
37ab34a49f 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
5920de5c8c 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
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