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7a65839f41
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10553 Commits

Author SHA1 Message Date
Chris Lattner
7a65839f41 Teach loop-reduce to see into nested loops, to pull out immediate values 
pushed down by SCEV.

In a nested loop case, this allows us to emit this:

        lis r3, ha16(L_A$non_lazy_ptr)
        lwz r3, lo16(L_A$non_lazy_ptr)(r3)
        add r2, r2, r3
        li r3, 1
.LBB_foo_2:     ; no_exit.1
        lfd f0, 8(r2)        ;; Uses offset of 8 instead of 0
        stfd f0, 0(r2)
        addi r4, r3, 1
        addi r2, r2, 8
        cmpwi cr0, r3, 100
        or r3, r4, r4
        bne .LBB_foo_2  ; no_exit.1

instead of this:

        lis r3, ha16(L_A$non_lazy_ptr)
        lwz r3, lo16(L_A$non_lazy_ptr)(r3)
        add r2, r2, r3
        addi r3, r3, 8
        li r4, 1
.LBB_foo_2:     ; no_exit.1
        lfd f0, 0(r3)
        stfd f0, 0(r2)
        addi r5, r4, 1
        addi r2, r2, 8
        addi r3, r3, 8
        cmpwi cr0, r4, 100
        or r4, r5, r5
        bne .LBB_foo_2  ; no_exit.1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22639 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 23:44:42 +00:00
Chris Lattner
be3e5212e2 improve debug output 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22638 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 23:30:08 +00:00
Nate Begeman
1c73c7be9d Scalar SSE: load +0.0 -> xorps/xorpd 
Scalar SSE: a < b ? c : 0.0 -> cmpss, andps
Scalar SSE: float -> i16 needs to be promoted


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22637 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 23:26:28 +00:00
Chris Lattner
2351abaeab Move from Stage 0 to Stage 1. 
Only emit one PHI node for IV uses with identical bases and strides (after
moving foldable immediates to the load/store instruction).

This implements LoopStrengthReduce/dont_insert_redundant_ops.ll, allowing
us to generate this PPC code for test1:

        or r30, r3, r3
.LBB_test1_1:   ; Loop
        li r2, 0
        stw r2, 0(r30)
        stw r2, 4(r30)
        bl L_pred$stub
        addi r30, r30, 8
        cmplwi cr0, r3, 0
        bne .LBB_test1_1        ; Loop

instead of this code:

        or r30, r3, r3
        or r29, r3, r3
.LBB_test1_1:   ; Loop
        li r2, 0
        stw r2, 0(r29)
        stw r2, 4(r30)
        bl L_pred$stub
        addi r30, r30, 8        ;; Two iv's with step of 8
        addi r29, r29, 8
        cmplwi cr0, r3, 0
        bne .LBB_test1_1        ; Loop


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22635 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 22:51:21 +00:00
Andrew Lenharth
dc7c0b8c22 Alpha ABI specifies stack is always 16 byte alligned, and gcc does it, so I will too 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22634 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 22:33:21 +00:00
Chris Lattner
ec3fb63af2 Rename IVUse to IVUsersOfOneStride, use a struct instead of a pair to 
unify some parallel vectors and get field names more descriptive than
"first" and "second".  This isn't lisp afterall :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22633 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 22:21:05 +00:00
Chris Lattner
52d83e66ee Fix a nasty dangling pointer issue. The ScalarEvolution pass would keep a 
map from instruction* to SCEVHandles.  When we delete instructions, we have
to tell it about it.  We would run into nasty cases where new instructions
were reallocated at old instruction addresses and get the old map values.
Bad bad bad :(


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22632 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 21:36:09 +00:00
Chris Lattner
4c64dd7977 Fix PR611, codegen'ing SREM of FP operands to fmod or fmodf instead of 
the sequence used for integer ops


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22629 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 20:31:37 +00:00
Chris Lattner
f1adce42b2 The correct fix for PR612, which also fixes 
Transforms/LowerInvoke/2005-08-03-InvokeWithPHIUse.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22628 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 18:51:44 +00:00
Chris Lattner
6e459bf0a7 When inserting code, make sure not to insert it before PHI nodes. This 
fixes PR612 and Transforms/LowerInvoke/2005-08-03-InvokeWithPHI.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22626 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 18:34:29 +00:00
Chris Lattner
6306d07aa8 Fix Transforms/SimplifyCFG/2005-08-03-PHIFactorCrash.ll, a problem that 
occurred while bugpointing another testcase


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22621 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 17:59:45 +00:00
Chris Lattner
b06f677c53 add support for Graphviz when viewing CFGs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22620 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 17:55:05 +00:00
Misha Brukman
0a3f677f09 Fix grammar: apostrophe-s ('s) is possessive, not plural; also iff vs. if. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22619 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 17:29:52 +00:00
Chris Lattner
a34cbcc50a minor capitalization thing, patch by Jim Laskey 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22617 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 16:52:22 +00:00
Chris Lattner
1aad921c18 Finally, add the required constraint checks to fix Transforms/SimplifyCFG/2005-08-01-PHIUpdateFail.ll 
the right way


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22615 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 00:59:12 +00:00
Chris Lattner
dc88dbeafa Simplify some code, add the correct pred checks 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22613 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 00:38:27 +00:00
Chris Lattner
3b3efc7797 Refactor code out of PropagatePredecessorsForPHIs, turning it into a pure function with no side-effects 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22612 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 00:29:26 +00:00
Chris Lattner
d423b8b6ca use splice instead of remove/insert to avoid some symtab operations 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22611 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 00:23:42 +00:00
Chris Lattner
2bdcb56146 move two functions up in the file, use SafeToMergeTerminators to eliminate 
some duplicated code


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22610 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 00:19:45 +00:00
Chris Lattner
7e66348cba Rip some code out of the main SimplifyCFG function into a subfunction and 
call it from the only place it is live.  No functionality changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22609 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-03 00:11:16 +00:00
Chris Lattner
17de414965 Disable this patch: 
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20050801/027345.html

This breaks real programs and only fixes an obscure regression testcase.  A
real fix is in development.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22606 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 23:31:38 +00:00
Chris Lattner
f5e982daa8 Change a place to use an arbitrary value instead of null, when possible 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22605 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 23:29:23 +00:00
Chris Lattner
9e17df80ca one more hunk that got dropped 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22596 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 19:35:29 +00:00
Chris Lattner
c0d590b6f2 This hunk accidentally got dropped. Patch by Jim Laskey 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22595 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 19:30:55 +00:00
Chris Lattner
0561b3ff9f Update to use the new MathExtras.h support for log2 computation. 
Patch contributed by Jim Laskey!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22594 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 19:26:06 +00:00
Chris Lattner
bcd7db59d0 Update to use the new MathExtras.h support for log2 computation. 
Patch contributed by Jim Laskey!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22592 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 19:16:58 +00:00
Chris Lattner
3f270130b5 add a pass name to make debugging dumps nicer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22588 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 19:07:49 +00:00
Misha Brukman
15d89cba85 Fix grammar: it's == "it is". 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22587 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 16:04:59 +00:00
Chris Lattner
8105c76da4 Like the comment says, do not insert cast instructions before phi nodes 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22586 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 03:31:14 +00:00
Jeff Cohen
64fe58490d It's dangerous coding on Mondays. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22585 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 03:26:32 +00:00
Chris Lattner
1593ac259d This code was very close, but not quite right. It did not take into 
consideration the case where a reference in an unreachable block could
occur.  This fixes Transforms/SimplifyCFG/2005-08-01-PHIUpdateFail.ll,
something I ran into while bugpoint'ing another pass.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22584 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 03:24:05 +00:00
Jeff Cohen
ee841a1a87 Implement SetInterruptFunction for Windows. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22582 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 03:04:47 +00:00
Chris Lattner
7e608bbb5d add a comment, make a check more lenient 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22581 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 02:52:02 +00:00
Chris Lattner
e9100c69cb Simplify for loop, clear a per-loop map after processing each loop 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22580 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 02:44:31 +00:00
Chris Lattner
fa8c292ebd Implement sys::SetInterruptFunction on Unix, stub it on win32 so that the 
build will not fail


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22578 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 02:14:22 +00:00
Chris Lattner
07cd0ff298 Add a comment 
Make LSR ignore GEP's that have loop variant base values, as we currently
cannot codegen them


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22576 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 01:32:29 +00:00
Chris Lattner
1060e09fb2 Fix an iterator invalidation problem 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22575 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 00:41:11 +00:00
Chris Lattner
8dcd5483bc 200.sixtrack prints FP numbers with a very strange notation that uses D 
instead of E for exponentials (e.g. 1.234D-43).  Add support for this
notation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22574 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-02 00:11:53 +00:00
Andrew Lenharth
5bca0da936 update function codes to reflect /su flags that have been added since this was written 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22571 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-01 20:06:01 +00:00
Chris Lattner
e21c305ed8 Fix casts from long to sbyte on ppc 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22570 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-01 18:16:37 +00:00
Andrew Lenharth
01c8f6e452 use llabs not abs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22569 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-01 17:47:28 +00:00
Andrew Lenharth
2b3b89c28e one cannot allocate a global, until one is done initializing the global pointers 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22568 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-01 17:35:40 +00:00
Chris Lattner
9cc5f42feb ConstantInt::get only works for arguments < 128. 
SimplifyLibCalls probably has to be audited to make sure it does not make
this mistake elsewhere.  Also, if this code knows that the type will be
unsigned, obviously one arm of this is dead.

Reid, can you take a look into this further?


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22566 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-08-01 16:52:50 +00:00
Jeff Cohen
d29b6aa608 Keep tabs and trailing spaces out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22565 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-30 18:33:25 +00:00
Jeff Cohen
cfb1d4235f Fix VC++ build problems. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22564 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-30 18:22:27 +00:00
Chris Lattner
f20d183c22 fix float->long conversions on x86 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22563 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-30 01:40:57 +00:00
Chris Lattner
a88da08c6e fix a typeo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22561 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-30 00:43:00 +00:00
Nate Begeman
f84d5ab5df Ack, typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22560 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-30 00:21:31 +00:00
Chris Lattner
a35e1dfd12 Change the fp to integer code to not perform 2-byte stores followed by 
1 byte loads and other operations.  This is bad for store-forwarding on
common CPUs.  We now do this:

fnstcw WORD PTR [%ESP]
mov %AX, WORD PTR [%ESP]

instead of:

fnstcw WORD PTR [%ESP]
mov %AL, BYTE PTR [%ESP + 1]


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22559 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-30 00:17:52 +00:00
Nate Begeman
1699748567 Commit a new LoopStrengthReduce pass that can use scalar evolutions and 
target data to decide which loop induction variables to strength reduce
and how to do so.  This work is mostly by Chris Lattner, with tweaks by
me to get it working on some of MultiSource.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22558 91177308-0d34-0410-b5e6-96231b3b80d8
 2005-07-30 00:15:07 +00:00