Commit Graph

3865 Commits

Author SHA1 Message Date
Dan Gohman 5c4413120f Rename MVT::getVectorBaseType to MVT::getVectorElementType.
llvm-svn: 37579
2007-06-14 22:58:02 +00:00
Evan Cheng e08f0eefa6 Fix typo.
llvm-svn: 37577
2007-06-14 21:26:08 +00:00
Dan Gohman 4a4a8eb00e Add a target hook to allow loads from constant pools to be rematerialized, and an
implementation for x86.

llvm-svn: 37576
2007-06-14 20:50:44 +00:00
Evan Cheng 1e6f08b2a2 Fix some stupid bugs that have effectively disabled if-conversion.
llvm-svn: 37575
2007-06-14 20:28:52 +00:00
Duncan Sands 7413736a7e Only correctly lower exception handing intrinsics if exception handling is
turned on.  Likewise for scanning of invokes to mark landing pads.

llvm-svn: 37570
2007-06-13 16:53:21 +00:00
Dan Gohman 26455c4ae0 Introduce new SelectionDAG node opcodes VEXTRACT_SUBVECTOR and
VCONCAT_VECTORS. Use these for CopyToReg and CopyFromReg legalizing in
the case that the full register is to be split into subvectors instead
of scalars. This replaces uses of VBIT_CONVERT to present values as
vector-of-vector types in order to make whole subvectors accessible via
BUILD_VECTOR and EXTRACT_VECTOR_ELT.

This is in preparation for adding extended ValueType values, where
having vector-of-vector types is undesirable.

llvm-svn: 37569
2007-06-13 15:12:02 +00:00
Dan Gohman cbd51c8b60 When creating CopyFromReg nodes, always use legal types. And use the
correct types for the result vector, even though it is currently bitcasted
to a different type immediately.

llvm-svn: 37568
2007-06-13 14:55:16 +00:00
Duncan Sands 97f7236e70 The fix that was applied for PR1224 stops the compiler
crashing but breaks exception handling.  The problem
described in PR1224 is that invoke is a terminator that
can produce a value.  The value may be needed in other
blocks.  The code that writes to registers values needed
in other blocks runs before terminators are lowered (in
this case invoke) so asserted because the value was not
yet available.  The fix that was applied was to do invoke
lowering earlier, before writing values to registers.

The problem this causes is that the code to copy values
to registers can be output after the invoke call.  If
an exception is raised and control is passed to the
landing pad then this copy-code will never execute.  If
the value is needed in some code path reached via the
landing pad then that code will get something bogus.

So revert the original fix and simply skip invoke values
in the general copying to registers code.  Instead copy
the invoke value to a register in the invoke lowering code.

llvm-svn: 37567
2007-06-13 05:51:31 +00:00
Evan Cheng cbaaff58bf Typo
llvm-svn: 37566
2007-06-13 00:04:00 +00:00
Evan Cheng 9acfa7b063 Now if-converting all 4 variants of triangles.
llvm-svn: 37565
2007-06-12 23:54:05 +00:00
Lauro Ramos Venancio 4c2f003971 Fix a typo in bswap lowering.
llvm-svn: 37544
2007-06-11 23:16:16 +00:00
Evan Cheng 4dd31a7b1b Restructure code to reduce ifcvt compile time cost.
llvm-svn: 37543
2007-06-11 22:26:22 +00:00
Reid Spencer 14b62a553e Fix the build.
llvm-svn: 37537
2007-06-10 00:19:17 +00:00
Evan Cheng 2117d1f20e Don't change CFG during analysis stage. Do so during ifcvt and invalidate predecessors accordingly.
llvm-svn: 37531
2007-06-09 01:03:43 +00:00
Evan Cheng 288f1545a6 Carefully remove extraneous CFG edges after each ifcvt.
llvm-svn: 37529
2007-06-08 22:01:07 +00:00
Evan Cheng df1a42935b Correct transfer predicate information.
llvm-svn: 37524
2007-06-08 19:17:12 +00:00
Evan Cheng e93ccc013f Hidden options to help debugging ifcvt issues.
llvm-svn: 37523
2007-06-08 19:10:51 +00:00
David Greene 02f6e9b621 Factor live variable analysis so it does not do register coalescing
simultaneously.  Move that pass to SimpleRegisterCoalescing.

This makes it easier to implement alternative register allocation and
coalescing strategies while maintaining reuse of the existing live
interval analysis.

llvm-svn: 37520
2007-06-08 17:18:56 +00:00
Evan Cheng 7783f82e21 Allow more cmp / bcc to be predicated; clean up triangle ifcvt checking code.
llvm-svn: 37518
2007-06-08 09:36:04 +00:00
Duncan Sands dc8fc1550e Use more realistically sized vectors. Reserve capacity if we know in advance
how much will be used.

llvm-svn: 37515
2007-06-08 08:59:11 +00:00
Dale Johannesen 86798e5e11 Make throttle a hidden parameter, per review.
llvm-svn: 37511
2007-06-08 01:08:52 +00:00
Dale Johannesen 52fcf022f7 Throttle tail merging; handling blocks with large numbers of predecessors
is too slow.

llvm-svn: 37509
2007-06-08 00:34:27 +00:00
Evan Cheng 1236ef7bcc Only remove the edge from entry to false if false block is merged.
llvm-svn: 37503
2007-06-07 22:31:28 +00:00
Dale Johannesen 9a4d987a5f Do not change the size of function arguments. PR 1489.
llvm-svn: 37496
2007-06-07 21:07:15 +00:00
Evan Cheng d3f3f0adad ifcvt a triangle: don't merge ifcvt block with rejoin block if it can fall through to it. If merged, the resulting block is not a candidate for iterative ifcvting since it contains both predicated and non-predicated code.
llvm-svn: 37487
2007-06-07 08:13:00 +00:00
Evan Cheng be9859eea2 Lots of bug fixes. Now finally in a reasonable state.
llvm-svn: 37485
2007-06-07 02:12:15 +00:00
Owen Anderson cfb6f40424 Quick patch to fix the build, based on what it appears Evan meant to write.
Evan, please check that this is in fact correct.

llvm-svn: 37471
2007-06-06 16:22:00 +00:00
Duncan Sands 29d1dc6f1a Fold the exception actions table harder: if two typeid lists start the
same, only output one copy of the common part.

llvm-svn: 37470
2007-06-06 15:37:31 +00:00
Evan Cheng 9030b98aca Lots of bug fixes.
llvm-svn: 37467
2007-06-06 10:16:17 +00:00
Duncan Sands 61166501a1 Additional fix for PR1422: make sure the landing pad label is placed in the
correct machine basic block - do not rely on the eh.exception intrinsic
being in the landing pad: the loop optimizers can move it out.

llvm-svn: 37463
2007-06-06 10:05:18 +00:00
Evan Cheng e4ec918be0 If a unconditional branch is added to branch to the false path during ifcvt, the predicated block cannot be iteratively ifcvted.
llvm-svn: 37456
2007-06-06 02:08:52 +00:00
Evan Cheng b30a89457c Minor statistics counting bug.
llvm-svn: 37451
2007-06-06 01:12:44 +00:00
Evan Cheng 30565998bb Fix a couple of typos and be smarter about order of blocks when ifcvt a diamond.
llvm-svn: 37449
2007-06-06 00:57:55 +00:00
Evan Cheng 7948422b78 Fix diamond shape ifcvt bugs.
llvm-svn: 37444
2007-06-05 23:46:14 +00:00
Evan Cheng c1a0b8ce1d ReplaceUsesOfBlockWith() can modify the predecessors list.
llvm-svn: 37441
2007-06-05 22:03:53 +00:00
Evan Cheng 3e5bf0827c Do not ifcvt if either true / false path is a backedge. Not profitable in almost all cases.
llvm-svn: 37440
2007-06-05 20:38:42 +00:00
Evan Cheng 2c1acd6d9e I had a senior moment.
llvm-svn: 37433
2007-06-05 07:05:25 +00:00
Evan Cheng 6e4babe8cc If the predicated block requires an early exit, end the block there and add a unconditional branch to false block. AnalyzeBranch() does not understand early exits.
llvm-svn: 37430
2007-06-05 01:31:40 +00:00
Evan Cheng 17aad8164e Fix some subtle bugs: bug during succeessor copying; incorrectly updating states of ifcvted blocks.
llvm-svn: 37429
2007-06-05 00:07:37 +00:00
Dale Johannesen 0558dda319 Tail merging wasn't working for predecessors of landing pads. PR 1496.
llvm-svn: 37427
2007-06-04 23:52:54 +00:00
Evan Cheng 53ce7de03b Global ctors / dtors alignment shouldn't be hard-coded at 4. e.g. It could be 8 for 64-bit targets.
llvm-svn: 37421
2007-06-04 20:39:18 +00:00
Evan Cheng 91233153bf Forgot to check for if iterator reached the end.
llvm-svn: 37420
2007-06-04 20:33:36 +00:00
Dan Gohman b4c2690446 Pass the DAG to SDNode::dump to let it do more detailed dumps in some cases.
llvm-svn: 37413
2007-06-04 16:17:33 +00:00
Dan Gohman 92a7f3a65e Resolve implicit alignment before computing the FoldingSet information so
that the CSE map always contains explicit alignment information. This allows
more loads to be CSE'd when there is a mix of explicit-alignment loads and
implicit-alignment loads.

Also, in SelectionDAG::FindModifiedNodeSlot, add the operands to the
FoldingSetNodeID before the load/store information instead of after, so
that it matches what is done elsewhere.

llvm-svn: 37411
2007-06-04 15:49:41 +00:00
Evan Cheng 312b723af2 Let IfConverter loose. Allow more aggressive subsumptions; reorder basic blocks to expose more ifcvt opportunities; code clean up and fixes.
llvm-svn: 37409
2007-06-04 06:47:22 +00:00
Evan Cheng df75785594 Move ReplaceUsesOfBlockWith() out of BranchFolding into a MachineBasicBlock general facility.
llvm-svn: 37408
2007-06-04 06:44:01 +00:00
Duncan Sands f708f73a1b The semantics of invoke require that we always jump to the unwind block
(landing pad) when an exception unwinds through the call.  This doesn't
quite match the way the dwarf unwinder works: by default it only jumps to
the landing pad if the catch or filter specification matches, and otherwise
it keeps on unwinding.  There are two ways of specifying to the unwinder
that it should "always" (more on why there are quotes here later) jump to
the landing pad: follow the specification by a 0 typeid, or follow it by
the typeid for the NULL typeinfo.  GCC does the first, and this patch makes
LLVM do the same as gcc.  However there is a problem: the unwinder performs
optimizations based on C++ semantics (it only expects destructors to be
run if the 0 typeid fires - known as "cleanups"), meaning it assumes that no
exceptions will be raised and that the raised exception will be reraised
at the end of the cleanup code.  So if someone writes their own LLVM code
using the exception intrinsics they will get a nasty surprise if they don't
follow these rules.  The other possibility of using the typeid corresponding
to NULL (catch-all) causes the unwinder to make no assumptions, so this is
probably what we should use in the long-run.  However since we are still
having trouble getting exception handling working properly, for the moment
it seems best to closely imitate GCC.

llvm-svn: 37399
2007-06-02 17:16:06 +00:00
Duncan Sands c063f5f362 Integrate exception filter support and exception catch support. This
simplifies the code in DwarfWriter, allows for multiple filters and
makes it trivial to specify filters accompanied by cleanups or catch-all
specifications (see next patch).  What a deal!  Patch blessed by Anton.

llvm-svn: 37398
2007-06-02 16:53:42 +00:00
Zhou Sheng 0a0ae932ca Make LowerCTPOP() support arbitrary bitwidth integer type.
llvm-svn: 37397
2007-06-02 04:10:33 +00:00
Dale Johannesen 6e7cdce773 Fix CorrectExtraCFGEdges to allow for multiple LandingPad targets.
llvm-svn: 37394
2007-06-02 00:08:15 +00:00
Dale Johannesen 9746e3a22b Fancier algorithm in tail-merge comment implemented, so remove comment.
llvm-svn: 37393
2007-06-01 23:04:28 +00:00
Dale Johannesen 3c0a13762d Implement smarter algorithm for choosing which blocks to tail-merge.
See test/CodeGen/X86/test-pic-jtbl.ll for a case where it works well;
shaves another 10K off our favorite benchmark.  I was hesitant about
this because of compile speed, but seems to do OK on a bootstrap.

llvm-svn: 37392
2007-06-01 23:02:45 +00:00
Evan Cheng 4dcf1e8582 Correctly mark early-exit on the false path.
llvm-svn: 37387
2007-06-01 20:29:21 +00:00
Duncan Sands 706421e712 Since TypeInfos are passed as i8 pointers, a NULL TypeInfo should be passed
as a null i8 pointer not as a 0 i32.

llvm-svn: 37383
2007-06-01 08:18:30 +00:00
Evan Cheng 6a2cf070cc Ifcvt triangle: don't ifcvt 'true' BB if it has other predecessors; don't merge 'false' BB if it has other predecessors.
llvm-svn: 37382
2007-06-01 07:41:07 +00:00
Evan Cheng 95c7917d92 Remove a bogus check. Even terminators in a ifcvt need to be predicated. Unconditional branches can usually be converted to conditional ones.
llvm-svn: 37380
2007-06-01 00:55:26 +00:00
Evan Cheng 20e05997f5 Allow multiple ifcvt candidates to share children blocks; add some debugging code.
llvm-svn: 37379
2007-06-01 00:12:12 +00:00
Dale Johannesen 1a401e68a8 Arrange for only 1 of multiple branches to landing pad to be kept.
Do not remove empty landing pads (EH table needs to be updated)

llvm-svn: 37375
2007-05-31 21:54:00 +00:00
Evan Cheng e6ccb6c5ed Fix a typo.
llvm-svn: 37374
2007-05-31 20:53:33 +00:00
Chris Lattner 3e3ff30aa2 Fix the asmprinter so that a globalvalue can specify an explicit alignment
smaller than the preferred alignment, but so that the target can actually
specify a minimum alignment if needed.  This fixes some objc protocol
failures Devang tracked down.

llvm-svn: 37373
2007-05-31 18:57:45 +00:00
Lauro Ramos Venancio 5b0757a401 Fix PR1424.
When a function has FP, the register scavenging spill slot offset already
was calculated.

llvm-svn: 37371
2007-05-31 18:27:58 +00:00
Evan Cheng 905a8f4940 Change traversal order to bottom up in preparation for more aggressive if-conversion.
llvm-svn: 37365
2007-05-30 19:49:19 +00:00
Chris Lattner 397c4d9ef6 Fix CodeGen/PowerPC/2007-05-30-dagcombine-miscomp.ll, and PR1473.
llvm-svn: 37362
2007-05-30 16:30:06 +00:00
Dale Johannesen d14ad078c6 Changed per review comment.
llvm-svn: 37355
2007-05-30 00:32:01 +00:00
Dale Johannesen a69ebdbebc Make stable_sort in tail merging actually be stable (it never was, but didn't
matter until my last change).  Reenable tail merging by default.

llvm-svn: 37354
2007-05-29 23:47:50 +00:00
Evan Cheng 20f7d30f92 Don't merge in tail block of a diamond if it has more than one predecessors after if-conversion.
llvm-svn: 37353
2007-05-29 23:37:20 +00:00
Evan Cheng c2237ce217 If there is an empty block between a source and its successor block, it still requires a unconditional branch.
llvm-svn: 37344
2007-05-29 22:31:16 +00:00
Evan Cheng 5983bdbb2c Add missing const qualifiers.
llvm-svn: 37341
2007-05-29 18:35:22 +00:00
Zhou Sheng d7dc1ed64c Correct the logic in LowerPartSet which cleared the bits from 0 to low-1.
llvm-svn: 37331
2007-05-26 03:43:13 +00:00
Chris Lattner 4698083b96 tighten up recursion depth again
llvm-svn: 37330
2007-05-25 02:19:06 +00:00
Evan Cheng 13f5f7df95 Silly boog.
llvm-svn: 37328
2007-05-25 00:59:01 +00:00
Dale Johannesen 1409b6a59b Blocks that cond-br and uncond-br/fallthrough to same block should have
only one successor.

llvm-svn: 37324
2007-05-24 18:31:55 +00:00
Dale Johannesen 1af8c870c7 Fix for PR1444: do not create two successors to the same block.
Temporarily, this breaks CodeGen/Generic/2006-02-12-InsertLibraryCall.ll
by exposing an unrelated latent problem; working on that.

llvm-svn: 37323
2007-05-24 17:39:32 +00:00
Dan Gohman 30978078bf Minor comment cleanups.
llvm-svn: 37321
2007-05-24 14:36:04 +00:00
Dan Gohman 703e0f8608 Add explicit qualification for namespace MVT members.
llvm-svn: 37320
2007-05-24 14:33:05 +00:00
Evan Cheng a4d187b8ce Fix a typo that caused combiner to create mal-formed pre-indexed store where value store is the same as the base pointer.
llvm-svn: 37318
2007-05-24 02:35:39 +00:00
Dale Johannesen f4a77d2481 Two tail merging improvements:
When considering blocks with more than 2 predecessors, merge the block with
the largest number of matching insns, rather than the first block found.
Considering that 1 matching insn is enough to show a win for candidates that
already end with a branch.

llvm-svn: 37315
2007-05-23 21:07:20 +00:00
Anton Korobeynikov 3b327826db Mark all calls as "could throw", when exceptions are enabled. Emit necessary LP info too. This fixes PR1439
llvm-svn: 37311
2007-05-23 11:08:31 +00:00
Chris Lattner 6509c0673f prevent exponential recursion in isNegatibleForFree
llvm-svn: 37310
2007-05-23 07:35:22 +00:00
Evan Cheng d0e669199b Preliminary iterative if-conversion support.
llvm-svn: 37309
2007-05-23 07:23:16 +00:00
Dale Johannesen f9cbdc676c name change requested by review of previous patch
llvm-svn: 37289
2007-05-22 18:31:04 +00:00
Owen Anderson 0ae7eb5e7c Silence a warning.
llvm-svn: 37288
2007-05-22 18:13:40 +00:00
Dale Johannesen 82810c8a13 Make tail merging the default, except on powerPC. There was no prior art
for a target-dependent default with a command-line override; this way
should be generally usable.

llvm-svn: 37285
2007-05-22 17:14:46 +00:00
Evan Cheng e26c0916a3 If-convert early exit blocks (returns, etc.); bug fixes, etc.
llvm-svn: 37270
2007-05-21 22:22:58 +00:00
Duncan Sands 34e82a4508 Only emit one entry in the exception action table for each action, even if
it occurs for multiple landing pads.

llvm-svn: 37267
2007-05-21 18:50:28 +00:00
Chris Lattner 1fa8276e70 same patch as the previous one, but the symmetric case
llvm-svn: 37249
2007-05-19 00:46:51 +00:00
Chris Lattner b08cbbd737 Disable the (A == (B-A)) -> 2*A == B xform when the sub has multiple uses (in
this case, the xform introduces an extra operation).  This compiles
PowerPC/compare-duplicate.ll into:

_test:
        subf r2, r3, r4
        cmplw cr0, r2, r3
        bne cr0, LBB1_2 ;F

instead of:

_test:
        slwi r2, r3, 1
        subf r3, r3, r4
        cmplw cr0, r4, r2
        bne cr0, LBB1_2 ;F

This is target independent of course.

llvm-svn: 37246
2007-05-19 00:43:44 +00:00
Evan Cheng 018cffbca4 Clean up.
llvm-svn: 37237
2007-05-18 19:32:08 +00:00
Evan Cheng faaf716540 Change to depth-first traversal.
llvm-svn: 37236
2007-05-18 19:26:33 +00:00
Dale Johannesen dafda82755 Document an inefficiency in tail merging.
llvm-svn: 37235
2007-05-18 18:46:40 +00:00
Dan Gohman b539df3389 Qualify calls to getTypeForValueType with MVT:: too.
llvm-svn: 37233
2007-05-18 18:41:29 +00:00
Evan Cheng 2e82cefd24 Some restructuring in preparation for most aggressive if-conversion.
llvm-svn: 37231
2007-05-18 18:14:37 +00:00
Dan Gohman 1796f1f8e9 Qualify several calls to functions in the MVT namespace, for consistency.
llvm-svn: 37230
2007-05-18 17:52:13 +00:00
Evan Cheng f25d3a5d73 Watch out for blocks that end with a return.
llvm-svn: 37227
2007-05-18 17:06:53 +00:00
Evan Cheng 478b805956 If true / false blocks fallthrough before ifcvt, add unconditional branches to ifcvt'd block.
llvm-svn: 37200
2007-05-18 01:55:58 +00:00
Dale Johannesen f8956178af Remove some unneeded branches. (spotted by Evan, thanks)
llvm-svn: 37198
2007-05-18 01:28:58 +00:00
Evan Cheng 0f745da4fe Make use of target specific block size limits; bug fixes.
llvm-svn: 37195
2007-05-18 00:20:58 +00:00
Evan Cheng a92b2b38ff Move isSuccessor() offline, change it to use std::find.
llvm-svn: 37190
2007-05-17 23:58:53 +00:00
Chris Lattner 0184f88deb disable MaskedValueIsZero, ComputeMaskedBits, and SimplifyDemandedBits for
i128 integers.  The 64-bit masks are not wide enough to represent the results.
These should be converted to APInt someday.

llvm-svn: 37169
2007-05-17 18:19:23 +00:00
Chris Lattner 2135bc08d6 add expand support for ADDC/SUBC/ADDE/SUBE so we can codegen 128-bit add/sub on 32-bit (or less) targets
llvm-svn: 37168
2007-05-17 18:15:41 +00:00
Evan Cheng 429178d727 Add target hook to specify block size limit for if-conversion.
llvm-svn: 37134
2007-05-16 23:45:53 +00:00
Dale Johannesen 7a6c175e7a Don't fold bitconvert(load) for preinc/postdec loads. Likewise stores.
llvm-svn: 37130
2007-05-16 22:45:30 +00:00
Evan Cheng af71610429 isBlockPredicable() always ignore terminal instructions; add comments.
llvm-svn: 37126
2007-05-16 21:54:37 +00:00
Evan Cheng 5ea933a009 Rename M_PREDICATED to M_PREDICABLE; Moved isPredicable() to MachineInstr.
llvm-svn: 37121
2007-05-16 20:56:08 +00:00
Duncan Sands 59ae77486c Output exception call-sites in address order, as required by the unwinding
runtime.

llvm-svn: 37104
2007-05-16 12:12:23 +00:00
Chris Lattner 48fb92f75d Use a ptr set instead of a linear search to unique TokenFactor operands.
This fixes PR1423

llvm-svn: 37102
2007-05-16 06:37:59 +00:00
Evan Cheng 35fc2119b0 Devang points out that we need an assertion here.
llvm-svn: 37097
2007-05-16 05:11:10 +00:00
Evan Cheng 288f133c71 Bug fix: should check ABI alignment, not pref. alignment.
llvm-svn: 37094
2007-05-16 02:04:50 +00:00
Evan Cheng f5e53a58db Initial commit of (very basic) if converter.
llvm-svn: 37092
2007-05-16 02:00:57 +00:00
Dale Johannesen 420a85d0cf Remove extra CFG edges before doing these passes; it makes them happier.
llvm-svn: 37089
2007-05-15 21:19:17 +00:00
Lauro Ramos Venancio 3f142cbca2 Fix an infinite recursion in GetNegatedExpression.
llvm-svn: 37086
2007-05-15 17:05:43 +00:00
Duncan Sands 750e8c5d4d The index into the actions table is a ULEB128 not a SLEB128.
llvm-svn: 37084
2007-05-15 13:54:14 +00:00
Reid Spencer daed139420 Un-brain-dead-ify the lowering of part set for the reverse case.
llvm-svn: 37071
2007-05-15 02:26:52 +00:00
Chris Lattner c7596efdad Fix some subtle issues handling immediate values. This fixes
test/CodeGen/ARM/2007-05-14-InlineAsmCstCrash.ll

llvm-svn: 37069
2007-05-15 01:33:58 +00:00
Evan Cheng 4d728b0419 Added getNumExplicitOperands and findFirstPredOperand.
llvm-svn: 37064
2007-05-15 01:26:09 +00:00
Chris Lattner e49c974a7c implement a simple fneg optimization/propagation thing. This compiles:
CodeGen/PowerPC/fneg.ll into:

_t4:
        fmul f0, f3, f4
        fmadd f1, f1, f2, f0
        blr

instead of:

_t4:
        fneg f0, f3
        fmul f0, f0, f4
        fmsub f1, f1, f2, f0
        blr

llvm-svn: 37054
2007-05-14 22:04:50 +00:00
Evan Cheng e1595b6859 Only worry about intervening kill if there are more than one live ranges in the interval.
llvm-svn: 37052
2007-05-14 21:23:51 +00:00
Evan Cheng c690cba7d9 Fix for PR1406:
v1 =
r2 = move v1
   = op r2<kill>
...
r2 = move v1
   = op r2<kill>

Clear the first r2 kill if v1 and r2 are joined.

llvm-svn: 37050
2007-05-14 21:10:05 +00:00
Evan Cheng fc2377d4ed When marking a register as being implicitly defined, make sure to clear its partial use info as well.
llvm-svn: 37046
2007-05-14 20:39:18 +00:00
Reid Spencer 764ae2a21b Give names to the final result values of the part_set computations. This
just aids in readability and debugability of the output. No functional change.

llvm-svn: 37037
2007-05-14 17:21:17 +00:00
Anton Korobeynikov 1ee0c8d563 Emit function debug frames in one atom. This will prevent us from generating incorrect assembler in case of both
debug information & exception information presented.

llvm-svn: 37019
2007-05-13 17:30:11 +00:00
Anton Korobeynikov bbaf55448b Emit multiple common EH frames for multiple (including blank) personality
functions. This partly fixes PR1414: now we're restricted only to one
personality function per eh frame, not per module. Further work on
"multiple personalities" topic needs representative example.

llvm-svn: 37018
2007-05-13 15:42:26 +00:00
Anton Korobeynikov 13da17843c More DWARF-related things cleanup:
1. Fix PR1380
2. Apply Duncan's patch from PR1410
3. Insert workaround for "one personality function per module" as noted in PR1414
4. Emit correct debug frames for x86/linux. This partly fixes DebugInfo/2006-11-06-StackTrace.cpp: stack trace is
shown correctly, but arguments for function on top of stack are displayed incorrectly.

llvm-svn: 37015
2007-05-12 22:36:25 +00:00
Reid Spencer bf283708f7 Get the size of auto arrays right, regardless of its changing size.
llvm-svn: 37006
2007-05-12 11:07:40 +00:00
Devang Patel 79a71ec3ad Fix http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070507/049516.html
llvm-svn: 36998
2007-05-11 23:14:43 +00:00
Anton Korobeynikov 67286b1266 Perform correct actions numbers/sizes computation
llvm-svn: 36988
2007-05-11 08:47:35 +00:00
Anton Korobeynikov 00d02442b0 Fix action No calculation in multiple-invoke-one-LP mode
llvm-svn: 36987
2007-05-11 08:23:57 +00:00
Dale Johannesen cc8f571bc8 Do not generate branches to entry block. This fixes several test suite
failures on PPC (can happen only when prologue code is null)

llvm-svn: 36979
2007-05-10 23:59:23 +00:00
Anton Korobeynikov ee02c7d2fb Ooops. Some debugging stuff :)
llvm-svn: 36978
2007-05-10 22:38:46 +00:00
Anton Korobeynikov 96142de3f0 Allow multiple invokes per landing pad. This (probably) fixes PR1410.
llvm-svn: 36977
2007-05-10 22:34:59 +00:00
Duncan Sands b43fe52136 Later computations assume we are aligned at this point.
llvm-svn: 36975
2007-05-10 18:40:24 +00:00
Anton Korobeynikov ed5dad4306 TypeIds are indexed by j, not i
llvm-svn: 36974
2007-05-10 15:10:34 +00:00
Dale Johannesen 6e16d09252 Make tail merging handle many more cases (all it can, I think).
llvm-svn: 36966
2007-05-10 01:01:49 +00:00
Evan Cheng f325c2a65e Can't fold the bit_convert is the store is a truncating store.
llvm-svn: 36962
2007-05-09 21:49:47 +00:00
Anton Korobeynikov 192d09c2d9 Do not assert, when case range split metric is zero and JTs are not allowed: just emit binary tree in this case. This
fixes PR1403.

llvm-svn: 36959
2007-05-09 20:07:08 +00:00
Bill Wendling 31fd60ba0c Change names from RA to something unique to get rid of naming conflicts with
certain linkers...

llvm-svn: 36944
2007-05-08 19:02:46 +00:00
Evan Cheng 9e17872c1d Eliminate MarkVirtRegAliveInBlock recursion.
llvm-svn: 36943
2007-05-08 19:00:00 +00:00
Evan Cheng 562e45692e Forgot a check.
llvm-svn: 36910
2007-05-07 21:36:06 +00:00
Evan Cheng a4cf58a103 Enable a couple of xforms:
- (store (bitconvert v)) -> (store v) if resultant store does not require
higher alignment
- (bitconvert (load v)) -> (load (bitconvert*)v) if resultant load does not
require higher alignment

llvm-svn: 36908
2007-05-07 21:27:48 +00:00
Dale Johannesen 9a25b3afcd Handle some non-exit blocks in tail merging.
llvm-svn: 36907
2007-05-07 20:57:21 +00:00
Duncan Sands 671e8c4444 Parameter attributes on invoke calls were being lost due to the wrong
attribute index being used.  Fix proposed by Anton Korobeynikov, who
asked me to implement and commit it for him.  This is PR1398.

llvm-svn: 36906
2007-05-07 20:49:28 +00:00
Anton Korobeynikov a8fd7fdc25 Detabify
llvm-svn: 36891
2007-05-06 20:14:21 +00:00
Nick Lewycky e7da2d6ac3 Fix typo in comment.
llvm-svn: 36873
2007-05-06 13:37:16 +00:00
Duncan Sands 00282a21a5 Use the personality function that was registered with MMI rather than
hardwiring in the C++ one.

llvm-svn: 36789
2007-05-05 20:27:00 +00:00
Chris Lattner 07e6f3257c Propagate alignment/volatility in two places.
Implement support for expanding a bitcast from an illegal vector type to
a legal one (e.g. 4xi32 -> 4xf32 in SSE1).  This fixes PR1371 and
CodeGen/X86/2007-05-05-VecCastExpand.ll

llvm-svn: 36787
2007-05-05 19:39:05 +00:00
Duncan Sands 02528f5425 Spelling fix.
llvm-svn: 36781
2007-05-05 16:32:57 +00:00
Anton Korobeynikov 4db0090339 Emit sections/directives in the proper order. This fixes PR1376. Also,
some small cleanup was made.

llvm-svn: 36780
2007-05-05 09:04:50 +00:00
Duncan Sands 4cb9eb81ef A bitcast of a global variable may have been constant folded to a GEP -
handle this case too.

llvm-svn: 36745
2007-05-04 17:12:26 +00:00
Evan Cheng 044a0a8cfb Don't create indexed load / store with zero offset!
llvm-svn: 36716
2007-05-03 23:52:19 +00:00
Chris Lattner 44a2ed66b1 Allow i/s to match (gv+c). This fixes CodeGen/PowerPC/2007-05-03-InlineAsm-S-Constraint.ll
and PR1382

llvm-svn: 36672
2007-05-03 16:54:34 +00:00