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Author SHA1 Message Date
Bill Wendling
d4a3c71eb1 Perform this loop only when the -debug flag is specified. 
llvm-svn: 61238
 2008-12-19 02:09:57 +00:00
Dan Gohman
3991753a76 Initialize the ImplicitDefed member, to avoid getting stale 
data from a previous block.

llvm-svn: 61237
 2008-12-19 00:46:20 +00:00
Dan Gohman
1e66a47f73 Fix RegScavenger::forward() to work on basic blocks containing exactly 
one instruction.

llvm-svn: 61236
 2008-12-19 00:45:13 +00:00
Dan Gohman
40ff87ab97 Delete the RegScavenging constructor that takes a MachineBasicBlock 
argument. Nothing was using it, and it set the MBB member without
calling enterBasicBlock, which was problematic.

llvm-svn: 61234
 2008-12-19 00:34:32 +00:00
Mon P Wang
4e9022582d Fix test to account for generating some vector code for mul v2i64 instead 
of incorrectly generating pmuldq

llvm-svn: 61228
 2008-12-18 23:42:37 +00:00
Bill Wendling
4ca9e94f91 Didn't mean to commit this. 
llvm-svn: 61222
 2008-12-18 22:19:50 +00:00
Dan Gohman
42b2f38113 Teach LowerSubregs to preserve kill/dead information when lowering 
subreg instructions.

llvm-svn: 61220
 2008-12-18 22:14:08 +00:00
Bill Wendling
5ec9cb2217 Re-XFAIL this test until debug stuff settles down. 
llvm-svn: 61219
 2008-12-18 22:13:31 +00:00
Dan Gohman
ca2ab1f2c8 Make LowerSubregs' debug output for EXTRACT_SUBREG consistent with 
that of INSERT_SUBREG and SUBREG_TO_REG.

llvm-svn: 61218
 2008-12-18 22:11:34 +00:00
Dan Gohman
7000e62d3a Fix a copy+pasto in an assertion message. 
llvm-svn: 61217
 2008-12-18 22:07:25 +00:00
Dan Gohman
34e47d552b Fix indentation level. 
llvm-svn: 61216
 2008-12-18 22:06:01 +00:00
Dan Gohman
1c74326cea When emitting instructions that define EFLAGS and the EFLAGS value isn't 
used, mark the defs as dead.

llvm-svn: 61215
 2008-12-18 22:03:42 +00:00
Dan Gohman
54790143b2 When setting up the frame pointer, add it as a live-in register to all 
non-entry blocks, so that it doesn't appear use-before-def anywhere.

llvm-svn: 61214
 2008-12-18 22:01:52 +00:00
Dan Gohman
47de8c174c Print subreg information in MachineInstr::dump. 
llvm-svn: 61213
 2008-12-18 21:51:27 +00:00
Mon P Wang
9f8945c5b9 Fixed x86 code generation of multiple for v2i64. It was incorrect for SSE4.1. 
llvm-svn: 61211
 2008-12-18 21:42:19 +00:00
Mon P Wang
5b74ab1f1e Added some basic test cases for r61209 
llvm-svn: 61210
 2008-12-18 20:05:58 +00:00
Mon P Wang
84ad2a383d Added support for vector widening. 
llvm-svn: 61209
 2008-12-18 20:03:17 +00:00
Evan Cheng
d3d1efc584 Remove dead comments. 
llvm-svn: 61201
 2008-12-18 09:01:18 +00:00
Nick Lewycky
c6e4019d57 Oops! Left out a line. 
Simplifying the sdiv might allow further simplifications for our users.

llvm-svn: 61196
 2008-12-18 06:42:28 +00:00
Nick Lewycky
ab50d88e6a Make all the vector elements positive in an srem of constant vector. 
llvm-svn: 61195
 2008-12-18 06:31:11 +00:00
Chris Lattner
6ecf1b2bb1 Fix PR2929 by making bugpoint/code extract propagate the nothrow 
bit from the original function to the cloned one.

llvm-svn: 61194
 2008-12-18 05:52:56 +00:00
Mikhail Glushenkov
964b643cf8 Fix typo in error message. 
llvm-svn: 61191
 2008-12-18 04:06:58 +00:00
Nick Lewycky
4a36d896bf Recommit this grammar fix that was backed out along with nocapture. 
llvm-svn: 61189
 2008-12-18 02:15:05 +00:00
Dan Gohman
fae8a30dce Give MachineLICM a name, for -time-passes etc. 
llvm-svn: 61184
 2008-12-18 01:37:56 +00:00
Dan Gohman
6b4f972c9f Move post-RA scheduling before branch folding for now, because branch 
folding's tail merging doesn't currently preserve liveness information
which post-RA scheduling requires.

llvm-svn: 61183
 2008-12-18 01:36:42 +00:00
Owen Anderson
9a489bf18a Re-apply r61158 in a form that no longer breaks tests. 
llvm-svn: 61182
 2008-12-18 01:27:19 +00:00
Dale Johannesen
4209bca535 Revert previous patch, appears to break bootstrap. 
llvm-svn: 61181
 2008-12-18 01:23:41 +00:00
Dan Gohman
fb30c38893 Mark the x86 fp stack registers as "reserved". This tells LiveVariables 
and the RegisterScavenger not to expect traditional liveness 
techniques are applicable to these registers, since we don't fully
modify the effects of push and pop after stackification.

llvm-svn: 61179
 2008-12-18 01:05:09 +00:00
Dale Johannesen
3e0c1f771b Fix the time regression I introduced in 464.h264ref with 
my last patch to this file.

The issue there was that all uses of an IV inside a loop
are actually references to Base[IV*2], and there was one
use outside that was the same but LSR didn't see the base
or the scaling because it didn't recurse into uses outside
the loop; thus, it used base+IV*scale mode inside the loop
instead of pulling base out of the loop.  This was extra bad
because register pressure later forced both base and IV into
memory.  Doing that recursion, at least enough
to figure out addressing modes, is a good idea in general;
the change in AddUsersIfInteresting does this.  However,
there were side effects....

It is also possible for recursing outside the loop to
introduce another IV where there was only 1 before (if
the refs inside are not scaled and the ref outside is).
I don't think this is a common case, but it's in the testsuite.
It is right to be very aggressive about getting rid of
such introduced IVs (CheckForIVReuse and the handling of
nonzero RewriteFactor in StrengthReduceStridedIVUsers).
In the testcase in question the new IV produced this way
has both a nonconstant stride and a nonzero base, neither
of which was handled before.  (This patch does not handle 
all the cases where this can happen.)  And when inserting 
new code that feeds into a PHI, it's right to put such 
code at the original location rather than in the PHI's 
immediate predecessor(s) when the original location is outside 
the loop (a case that couldn't happen before)
(RewriteInstructionToUseNewBase); better to avoid making
multiple copies of it in this case.

Everything above is exercised in
CodeGen/X86/lsr-negative-stride.ll (and ifcvt4 in ARM which is
the same IR).

llvm-svn: 61178
 2008-12-18 00:57:22 +00:00
Chris Lattner
d159077cb9 reapply this hunk from Bill's reversion in r61169, it is conservative 
and safe and orthogonal from turning off load pre.

llvm-svn: 61177
 2008-12-18 00:51:32 +00:00
Bill Wendling
61b2c0c046 XFAIL on Linux. 
llvm-svn: 61176
 2008-12-18 00:35:21 +00:00
Chris Lattner
005d68a2a9 make instnamer name unnamed blocks as well as instructions and args. 
llvm-svn: 61175
 2008-12-18 00:33:11 +00:00
Bill Wendling
0aa119d1f9 Do not XFAIL. 
llvm-svn: 61174
 2008-12-18 00:27:15 +00:00
Bill Wendling
3eb7c0254b Temporarily revert r61027. It was causing a bootstrap failure in "release" mode 
with everyone's favorite error messages:

Comparing stages 2 and 3
warning: ./cc1-checksum.o differs
warning: ./cc1plus-checksum.o differs
Bootstrap comparison failure!
./c-decl.o differs
./cp/decl.o differs
./df-core.o differs
./gcc.o differs
./i386.o differs
./stor-layout.o differs
./tree-pretty-print.o differs
./tree.o differs
make[2]: *** [compare] Error 1
make[1]: *** [stage3-bubble] Error 2

See PR3227.

llvm-svn: 61169
 2008-12-17 23:31:20 +00:00
Devang Patel
fb89dfcc3f XFAIL for now. 
llvm-svn: 61167
 2008-12-17 22:54:54 +00:00
Devang Patel
c500dff638 Xfail these tests for now. 
llvm-svn: 61166
 2008-12-17 22:53:09 +00:00
Devang Patel
ceeecba890 Today the front-ends (llvm-gcc and clang) generate multiple llvm.dbg.compile_units to identify source file for various debug entities. Each llvm.dbg.compile_unit matches one file on the disk. However, the backend only supports one DW_TAG_compile_unit per .o file. The backend selects first compile_unit from the vector to construct DW_TAG_compile_unit entry, which is not correct in all cases. 
First step to resolve this is, record file name and directory directly in debug info for various debug entities. 

llvm-svn: 61164
 2008-12-17 22:39:29 +00:00
Owen Anderson
5f1bc95673 Revert r61158 for now, as it caused some test failures. 
llvm-svn: 61159
 2008-12-17 22:17:27 +00:00
Owen Anderson
446162d848 Fix miscompilations caused by renumbering, and enable it as part of prealloc splitting. 
llvm-svn: 61158
 2008-12-17 22:06:59 +00:00
Chris Lattner
a2aa680882 This adds some missing functions to the C binding: 
- ability to insert previously created instructions using a builder
- creation of aliases
- creation of inline asm constants

Patch by Zoltan Varga!

llvm-svn: 61153
 2008-12-17 21:39:50 +00:00
Bill Wendling
d364440e53 Forgot to revert r61031 when I reverted r61019, r61030, and r61040. 
llvm-svn: 61150
 2008-12-17 20:59:57 +00:00
Misha Brukman
7bd486d25a Simplified marking code regions -- no need to use <div> to surround <pre> tags. 
llvm-svn: 61143
 2008-12-17 18:11:40 +00:00
Misha Brukman
b4689d53be Instead of referring to the license file in the 2.3 release, refer to the 
always-current SVN version.

llvm-svn: 61142
 2008-12-17 18:06:53 +00:00
Misha Brukman
e3769b141e Added mention of the RELEASE_24 tag for the 2.4 release. 
llvm-svn: 61138
 2008-12-17 16:27:23 +00:00
Mon P Wang
bc3622287b Fix expansion of vsetcc to set the high bit for true instead of 1. 
llvm-svn: 61129
 2008-12-17 08:49:47 +00:00
Chris Lattner
c6134bffaf insert some sequence points and preincrement an iterator to avoid 
iterator invalidation problems.

llvm-svn: 61124
 2008-12-17 05:42:08 +00:00
Chris Lattner
196c166a06 Enhance heap sra to be substantially more aggressive w.r.t PHI 
nodes.  This allows it to do fairly general phi insertion if a 
load from a pointer global wants to be SRAd but the load is used
by (recursive) phi nodes.  This fixes a pessimization on ppc
introduced by Load PRE.

llvm-svn: 61123
 2008-12-17 05:28:49 +00:00
Dan Gohman
a8796f4908 Double the amount of memory reserved for SUnits. This is a 
temporary workaround for an obscure bug. When node cloning is
used, it is possible that more SUnits will be created, and
if the SUnits std::vector has to reallocate, it will
invalidate all the graph edges.

llvm-svn: 61122
 2008-12-17 04:30:46 +00:00
Dan Gohman
6ee60e3ac3 Use getDepth() and getHeight() instead of accessing the 
Depth and Height members directly, as they may not be
current.

llvm-svn: 61121
 2008-12-17 04:25:52 +00:00
Dan Gohman
dd705ea3e6 Fix the comments for getDepth and getHeight. 
llvm-svn: 61120
 2008-12-17 04:24:23 +00:00