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39fd6e81b1
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24229 Commits

Author SHA1 Message Date
Evan Cheng
39fd6e81b1 Factor code that finalize PHI nodes, jump tables, etc. out of SelectBasicBlock. No functionality changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54438 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-07 00:43:25 +00:00
Owen Anderson
9200e81a18 SDISel's constant branch folding can fold away self-loops, which doesn't result in any dead blocks, but 
rather an incorrect phi input.  Add code to UnreachableMachineBlockElim to get rid of these entries.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54432 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 23:16:52 +00:00
Owen Anderson
883771f86a Correct handle cases where two phis are coalesced together, and correct break up the case where two different 
phis want to coalesce with the same vreg.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54426 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 22:08:58 +00:00
Owen Anderson
aa111080df Oops, didn't mean to commit this. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54425 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 20:58:38 +00:00
Owen Anderson
9860b71b6a We don't need to try to coalesce input vregs that are the same as the output vreg. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54422 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 20:29:20 +00:00
Owen Anderson
9b49120408 Only trim a live interval if the register is not used after the PHI node. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54421 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 18:36:17 +00:00
Owen Anderson
788d04152a Only remap each VNInfo once when doing renumbering. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54420 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 18:35:45 +00:00
Dan Gohman
8a1510d192 Re-introduce the 8-bit subreg zext-inreg patterns for x86-32, 
this time using MOV32to32_ and MOV16to16_. Thanks to Evan for
suggesting this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54418 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 18:27:21 +00:00
Dan Gohman
4ce9627e97 Fix a shufflevector instcombine that was emitting invalid masks indices 
when it meant to be emitting undef indices.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54417 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 18:17:32 +00:00
Evan Cheng
f5e25f32c7 Fix PR2355: bug in ChangeCompareStride. When the loop termination compare is the only use of its iv stride, the stride can be eliminated by moving it to another stride. If the scale is negative, swap the predicate instead of using a inverse predicate. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54415 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 18:04:43 +00:00
Dan Gohman
165660e417 xchg does not modify FLAGS. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54411 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 15:52:50 +00:00
Chris Lattner
46bbad217b optimize a common idiom generated by clang for bitfield access, PR2638. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54408 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 07:35:52 +00:00
Bruno Cardoso Lopes
bbe51362d5 Added support for fp callee saved registers. 
Added fp register clobbering during calls.
Added AsmPrinter support for "fmask", a bitmask that indicates where on the 
stack the fp callee saved registers are.

Fixed the stack frame layout for Mips, now the callee saved regs 
are in the right stack location (a little documentation about how this
stack frame must look like is present in MipsRegisterInfo.cpp).
This was done using the method MipsRegisterInfo::adjustMipsStackFrame
To be more clear, these are examples of what is solves :  

1) FP and RA are also callee saved, and despite they aren't in CSI they 
   must be saved before the fp callee saved registers. 
2) The ABI requires that local varibles are allocated before the callee 
   saved register area, the opposite behavior from the default allocation.
3) CPU and FPU saved register area must be aligned independent of each
   other.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54403 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 06:14:43 +00:00
Chris Lattner
5af5f463e1 Zap sitofp/fptoui pairs. In all cases when the sign difference 
matters, the result is undefined anyway.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54396 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 05:13:06 +00:00
Nick Lewycky
b30591ec64 Reinstate this optimization, but without the miscompile. Thanks to Bill for 
tracking down that this was breaking llvm-gcc bootstrap on Linux.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54394 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-06 04:54:03 +00:00
Dan Gohman
1eac4e0844 Use strcpy instead of sprintf here. This avoids a GCC 4.3 format-string 
warning. There wasn't actually a problem here, because the contents of
the string are known.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54385 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 23:36:35 +00:00
Dan Gohman
5a6c448a7e Pass the computed iteration count value to RewriteLoopExitValues 
instead of having it call getIterationCount again.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54380 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 22:34:21 +00:00
Owen Anderson
24d79ba2ef Fix breakage on ARM/2008-04-10-ScavengerAssert.ll. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54378 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 22:24:40 +00:00
Evan Cheng
e9d5035838 Fix PR2620: Fix X86cmppd selection code so it expects operands to be v2f64. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54376 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 22:19:15 +00:00
Evan Cheng
e3b8a48d32 Fix PR2596: out of bound reference. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54375 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 21:51:46 +00:00
Owen Anderson
5d2f8072d4 Correctly handle replacement and removal of PHIs with one incoming register. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54374 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 21:40:45 +00:00
Bill Wendling
021507be82 Revert r53282. This was causing a miscompile on Linux. Also, the transformation 
looks bogus. Please see PR2629 for details on why this is breaking things.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54372 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 21:23:45 +00:00
Owen Anderson
71ac0be6bb Oops, we were already checking for dead phis. Handle this the proper way, then. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54371 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 21:18:51 +00:00
Owen Anderson
e7b8205e6e We don't need to update live intervals for dead PHIs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54369 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 20:51:26 +00:00
Owen Anderson
3bc9c6f3e7 Remove the -disable-correct-folding option, which was ugly and is no longer needed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54361 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 18:27:54 +00:00
Dan Gohman
c3be0fd8c3 Fix the AsmWriter to not print extra spaces after parameter attributes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54351 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 15:51:44 +00:00
Dan Gohman
8f613f30a7 Trim #includes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54350 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 15:32:23 +00:00
Dan Gohman
430b8a22e2 Fix several const-correctness issues, resolving some -Wcast-qual warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54349 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 14:45:15 +00:00
Evan Cheng
4fa393aae1 Remove #if 0. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54347 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 07:20:57 +00:00
Evan Cheng
068b4ff553 Fix PR2568: Fix bug that cause redudant kill marker after its live interval has been extended due to coalescing. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54346 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 07:10:38 +00:00
Owen Anderson
59c0d4fcde Remove unneeded iteration. Thanks to Dan for the feedback. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54337 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 00:30:10 +00:00
Owen Anderson
6ac8df7f61 This option doesn't need to be a target option. It can be in SDISel instead. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54336 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-05 00:27:28 +00:00
Owen Anderson
bd3ba461eb - Fix SelectionDAG to generate correct CFGs. 
- Add a basic machine-level dead block eliminator.

These two have to go together, since many other parts of the code generator are unable to handle the unreachable blocks otherwise created.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54333 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-04 23:54:43 +00:00
Eli Friedman
b42a626122 PR2621: Improvements to the SCEV AddRec binomial expansion. This 
version uses a new algorithm for evaluating the binomial coefficients 
which is significantly more efficient for AddRecs of more than 2 terms 
(see the comments in the code for details on how the algorithm works).  
It also fixes some bugs: it removes the arbitrary length restriction for 
AddRecs, it fixes the silent generation of incorrect code for AddRecs 
which require a wide calculation width, and it fixes an issue where we 
were incorrectly truncating the iteration count too far when evaluating 
an AddRec expression narrower than the induction variable.

There are still a few related issues I know of: I think there's 
still an issue with the SCEVExpander expansion of AddRec in terms of
the width of the induction variable used.  The hack to avoid generating 
too-wide integers shouldn't be necessary; instead, the callers should be 
considering the cost of the expansion before expanding it (in addition 
to not expanding too-wide integers, we might not want to expand 
expressions that are really expensive, especially when optimizing for 
size; calculating an length-17 32-bit AddRec currently generates about 250 
instructions of straight-line code on X86).  Also, for long 32-bit 
AddRecs on X86, CodeGen really sucks at scheduling the code.  I'm planning on 
filing follow-up PRs for these issues.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54332 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-04 23:49:06 +00:00
Dan Gohman
6f498b0a8e Fix SDISel lowering of PHI nodes to use ComputeValueVTs. 
This allows it to work correctly on aggregate values.
This fixes PR2623.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54331 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-04 23:42:46 +00:00
Dan Gohman
1f565bcff6 Fix SDISel lowering of zeroinitializer and undef to use ComputeValueVTs. 
This allows it to work correctly on nested aggregate values.
This fixes PR2625.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54330 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-04 23:30:41 +00:00
Dan Gohman
d0859943ac Add an assert to catch invalid VECTOR_SHUFFLE mask indices. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54329 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-04 23:09:15 +00:00
Bruno Cardoso Lopes
f7f3b50cd8 Mips ISelLowering cleanup : Removed old LowerCALL and FORMAL_ARGS helpers, they 
aren't used anyway, they also used to broke compiling when fastcc was specified for a
function, but not anymore.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54316 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-04 07:12:52 +00:00
Bruno Cardoso Lopes
ea9d4d6ab0 Handle i32->f32 bitconvert results. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54315 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-04 06:44:31 +00:00
Andrew Lenharth
08ca62bb6f Add atomic sub for other sizes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54314 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-03 20:17:34 +00:00
Chris Lattner
e594fd473e Emit saveri with the correct operand order, patch by Richard Pennington! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54313 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-03 18:16:14 +00:00
Bruno Cardoso Lopes
64cf160fef Fix PR2615 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54312 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-03 15:37:43 +00:00
Bruno Cardoso Lopes
91ef849e6c Improved asm inline for hi,lo results 
Added hi,lo registers to be used,def implicitly. This provides better handle of
instructions which use hi/lo.
Fixes a small BranchAnalysis bug


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54274 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-02 19:42:36 +00:00
Bruno Cardoso Lopes
1906c5a63b Apply the same pattern used in 'and' lowering for 'or' 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54273 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-02 19:37:33 +00:00
Duncan Sands
58921feaa9 Fix comment typos. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54266 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-08-01 12:23:49 +00:00
Bruno Cardoso Lopes
7bd7182e21 Expand fcopysign 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54250 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-31 18:50:54 +00:00
Bruno Cardoso Lopes
772837778b Handle more SELECT corner cases considering legalize types, probabily wont work with 
the default legalizer.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54249 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-31 18:31:28 +00:00
Dale Johannesen
7232464bda Add a flag to disable jump table generation (all 
switches use the binary search algorithm) for
environments that don't support it.  PPC64 JIT
is such an environment; turn the flag on for that.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54248 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-31 18:13:12 +00:00
Dan Gohman
75dcf08243 Improve dagcombining for sext-loads and sext-in-reg nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54239 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-31 00:50:31 +00:00
Bruno Cardoso Lopes
7030ae7728 Added pattern for floating point zero immediate (avoiding a constant pool 
access).
Added pattern to match bitconvert node.
Fixed MTC1 asm string bug.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54229 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-30 19:00:31 +00:00