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Author SHA1 Message Date
Dale Johannesen
e348900657 A new dag combine; several permutations of this 
are there under ADD, this one was missing.

llvm-svn: 61107
 2008-12-16 22:13:49 +00:00
Owen Anderson
36aba82416 Add code to renumber split intervals into new vregs. This is disabled for now until I finish working out some iterator invalidation issues. 
llvm-svn: 61104
 2008-12-16 21:35:08 +00:00
Chris Lattner
c4cc4a328f Fix another crash found by inspection. If we have a PHI node merging 
the load multiple times, make sure the check the uses of the PHI to 
ensure they are transformable.

llvm-svn: 61102
 2008-12-16 21:24:51 +00:00
Chris Lattner
8b1f2f76d7 fix a crash found by inspection. 
llvm-svn: 61101
 2008-12-16 21:04:51 +00:00
Eli Friedman
de614f9842 Add a helper to remove a branch and DCE the condition, and use it 
consistently for deleting branches.  In addition to being slightly 
more readable, this makes SimplifyCFG a bit better 
about cleaning up after itself when it makes conditions unused.

llvm-svn: 61100
 2008-12-16 20:54:32 +00:00
Dan Gohman
38316f49bd Eliminate the loop that walks the critical path. Instead, just track the 
position in the critical path during the main instruction walk.  This
eliminates the need for the CritialAntiDep DenseMap.

llvm-svn: 61096
 2008-12-16 19:27:52 +00:00
Bill Wendling
905350a341 Remove empty test. 
llvm-svn: 61095
 2008-12-16 19:07:17 +00:00
Bill Wendling
f807a68f2e Temporarily revert r61019, r61030, and r61040. These were breaking LLVM Release 
builds.

llvm-svn: 61094
 2008-12-16 19:06:48 +00:00
Dan Gohman
f8f5625748 Preserve SourceValue information when lowering produces multiple loads from 
different offsets within the same stack slot.

llvm-svn: 61093
 2008-12-16 18:25:36 +00:00
Evan Cheng
96d87db03b We have decided not to support inline asm where an output operand with a matching input operand with incompatible type (i.e. either one is a floating point and the other is an integer or the sizes of the types differ). SelectionDAGBuild will catch these and exit with an error. 
llvm-svn: 61092
 2008-12-16 18:21:39 +00:00
Oscar Fuentes
9a300fe336 CMake: Added DbgInfoPrinter.cpp to lib/Analysis/CMakeFiles.txt. 
llvm-svn: 61087
 2008-12-16 12:25:04 +00:00
Torok Edwin
453ef5b57c add testcase for -print-dbginfo 
llvm-svn: 61086
 2008-12-16 10:10:23 +00:00
Torok Edwin
9562aa1742 Add -print-dbginfo pass that prints LLVM IR with comments inserted to show 
which source/line a certain BB/instruction comes from, original variable names,
and original (unmangled) C++ name of functions.

llvm-svn: 61085
 2008-12-16 09:09:19 +00:00
Torok Edwin
fe974a7ca9 Add utility functions to search for DbgStopPointInst corresponding to an 
instruction or BasicBlock, and to search for DbgDeclareInst corresponding to a
variable.

llvm-svn: 61084
 2008-12-16 09:07:36 +00:00
Torok Edwin
2e2c464771 use different name for parameter to make it clear that we set DIDescriptor::GV 
llvm-svn: 61083
 2008-12-16 09:06:01 +00:00
Nick Lewycky
1b0fc83809 Generalize support for analyzing loops to include SLE/SGE loop exit conditions 
and support for non-unit strides with signed exit conditions.

llvm-svn: 61082
 2008-12-16 08:30:01 +00:00
Chris Lattner
e35c79577f switch some std::set/std::map to SmallPtrSet/DenseMap. 
llvm-svn: 61081
 2008-12-16 07:34:30 +00:00
Chris Lattner
b3becc5776 fix PR3217: fully cached queries need to be verified against the 
visited set before they are used.  If used, their blocks need to be
added to the visited set so that subsequent queries don't use conflicting
pointer values in the cache result blocks.

llvm-svn: 61080
 2008-12-16 07:10:09 +00:00
Dan Gohman
10eb3ccaeb Enable anti-dependence breaking by default when post-RA scheduling is enabled. 
llvm-svn: 61078
 2008-12-16 06:21:45 +00:00
Dan Gohman
9f37a0296b When breaking an anti-dependency, don't use a register which has seen 
one of its aliases defined. This is conservative, but tricky subreg
corner cases are outside the primary aim of this pass.

llvm-svn: 61077
 2008-12-16 06:20:58 +00:00
Dan Gohman
c3e24d559b Add initial support for back-scheduling address computations, 
especially in the case of addresses computed from loop induction
variables.

llvm-svn: 61075
 2008-12-16 03:35:01 +00:00
Dan Gohman
e2cf452271 Remove some special-case logic in ScheduleDAGSDNodes's 
latency computation code that is no longer needed with the
new method for handling latencies.

llvm-svn: 61074
 2008-12-16 03:31:11 +00:00
Dan Gohman
40a40dd7c1 Fix some register-alias-related bugs in the post-RA scheduler liveness 
computation code. Also, avoid adding output-depenency edges when both
defs are dead, which frequently happens with EFLAGS defs.

Compute Depth and Height lazily, and always in terms of edge latency
values. For the schedulers that don't care about latency, edge latencies
are set to 1.

Eliminate Cycle and CycleBound, and LatencyPriorityQueue's Latencies array.
These are all subsumed by the Depth and Height fields.

llvm-svn: 61073
 2008-12-16 03:25:46 +00:00
Misha Brukman
c6aef75cef * Comply with HTML 4.01 Strict 
* Added code-region markings to code sections to make them stand out
* Added pre.doc_code class to llvm.css to simplify marking code regions

llvm-svn: 61072
 2008-12-16 03:07:49 +00:00
Misha Brukman
129457e460 * Comply with HTML 4.01 Strict standard 
* Converted absolute links to llvm.org/docs to relative links
* Fixed spelling and s/;/:/, as needed

llvm-svn: 61071
 2008-12-16 02:54:22 +00:00
Dan Gohman
67e694b0ea Add a simple target-independent heuristic to allow targets with no 
instruction itinerary data to back-schedule loads.

llvm-svn: 61070
 2008-12-16 02:38:22 +00:00
Dan Gohman
8ddcdef08a Move addPred and removePred out-of-line. 
llvm-svn: 61067
 2008-12-16 01:05:52 +00:00
Dan Gohman
23aae3bba9 Make addPred and removePred return void, since the return value is not 
currently used by anything.

llvm-svn: 61066
 2008-12-16 01:00:55 +00:00
Dan Gohman
d6ad3f6178 This getEdgeAttributes doesn't need a template argument. 
llvm-svn: 61065
 2008-12-16 00:55:00 +00:00
Dan Gohman
399e0b540e Add a getSDep() access function to SUnitIterator to return the 
current SDep.

llvm-svn: 61064
 2008-12-16 00:51:33 +00:00
Dan Gohman
b697738ee4 Reorder some SDep methods. No functionality change. 
llvm-svn: 61063
 2008-12-16 00:48:53 +00:00
Dan Gohman
9ccf4a2a8a SDep's operator== should compare the Latency field too. 
llvm-svn: 61062
 2008-12-16 00:47:19 +00:00
Bill Wendling
efb04fd5a6 Change so that buildit won't need a parent directory with only the build scripts in them. 
llvm-svn: 61061
 2008-12-16 00:42:25 +00:00
Chris Lattner
3ac8ed076a add testcase for r61051 
llvm-svn: 61052
 2008-12-15 21:46:23 +00:00
Chris Lattner
9255745f90 enhance heap-sra to apply to fixed sized array allocations, not just 
variable sized array allocations.

llvm-svn: 61051
 2008-12-15 21:44:34 +00:00
Mon P Wang
bb3c2994f0 Added support for splitting and scalarizing vector shifts. 
llvm-svn: 61050
 2008-12-15 21:44:00 +00:00
Chris Lattner
2356082b5e Use stripPointerCasts. 
llvm-svn: 61047
 2008-12-15 21:20:32 +00:00
Chris Lattner
15ac84e027 minor tweaks for formatting, allow bitcast in ValueIsOnlyUsedLocallyOrStoredToOneGlobal. 
llvm-svn: 61046
 2008-12-15 21:08:54 +00:00
Chris Lattner
592852605f refactor some code into a new TryToOptimizeStoreOfMallocToGlobal function. 
Use GetElementPtrInst::hasAllZeroIndices where possible.

llvm-svn: 61045
 2008-12-15 21:02:25 +00:00
Chris Lattner
dd4c8f09fa add a basic test for heap-sra 
llvm-svn: 61041
 2008-12-15 19:42:05 +00:00
Chris Lattner
0e79aa6595 Teach basicaa to use the nocapture attribute when possible. When the 
intrinsics are properly marked nocapture, the fixme should be addressed.

llvm-svn: 61040
 2008-12-15 18:59:22 +00:00
Dan Gohman
f3c46b3496 Fix printing of PseudoSourceValues in SDNode graphs. 
llvm-svn: 61036
 2008-12-15 17:28:10 +00:00
Dan Gohman
d55f68eef2 Fix a typo in a comment. 
llvm-svn: 61035
 2008-12-15 17:26:50 +00:00
Chris Lattner
f678691da6 add some more notes. 
llvm-svn: 61033
 2008-12-15 08:32:28 +00:00
Chris Lattner
8119a1f70d Add a testcase for GCC PR 23455, which lpre handles now. Add some 
comments about why we're not getting other cases.

llvm-svn: 61032
 2008-12-15 07:49:24 +00:00
Nick Lewycky
212b42c4c0 Update generated files after nocapture syntax change. 
llvm-svn: 61031
 2008-12-15 07:31:07 +00:00
Nick Lewycky
504288e7af It turns out that "align 1" and unaligned are different. Add a bias to the 
alignment attribute such that 0 means unaligned.

This will probably require a rebuild of llvm-gcc because of the change to
Attributes.h. If you see many test failures on "make check", please rebuild
your llvm-gcc.

llvm-svn: 61030
 2008-12-15 07:29:55 +00:00
Mon P Wang
2f96113348 Added support to LegalizeType for expanding the operands of scalar to vector 
and insert vector element.  Modified extract vector element to extend the
result to match the expected promoted type.

llvm-svn: 61029
 2008-12-15 06:57:02 +00:00
Chris Lattner
30c1871282 gvn now hoists this load out of the hot non-call path. 
llvm-svn: 61028
 2008-12-15 06:34:48 +00:00
Chris Lattner
b467a5b4a5 Enable Load PRE. This teaches GVN to push partially redundant loads up the 
CFG when there is exactly one predecessor where the load is not available.
This is designed to not increase code size but still eliminate partially
redundant loads.  This fires 1765 times on 403.gcc even though it doesn't
do critical edge splitting yet (the most common reason for it to fail).

llvm-svn: 61027
 2008-12-15 05:28:29 +00:00