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033aaaf451
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2385 Commits

Author SHA1 Message Date
Chris Lattner
033aaaf451 Add/Sub/Mul are safe to promote here as well. Incrementing a single-bit 
bitfield now gives this code:

_plus:
        lwz r2, 0(r3)
        rlwimi r2, r2, 0, 1, 31
        xoris r2, r2, 32768
        stw r2, 0(r3)
        blr

instead of this:

_plus:
        lwz r2, 0(r3)
        srwi r4, r2, 31
        slwi r4, r4, 31
        addis r4, r4, -32768
        rlwimi r2, r4, 0, 0, 0
        stw r2, 0(r3)
        blr

this can obviously still be improved.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28275 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-13 02:16:08 +00:00
Chris Lattner
70074e00a2 Implement simple promotion for cast elimination in instcombine. This is 
currently very limited, but can be extended in the future.  For example,
we now compile:

uint %test30(uint %c1) {
        %c2 = cast uint %c1 to ubyte
        %c3 = xor ubyte %c2, 1
        %c4 = cast ubyte %c3 to uint
        ret uint %c4
}

to:

_xor:
        movzbl 4(%esp), %eax
        xorl $1, %eax
        ret

instead of:

_xor:
        movb $1, %al
        xorb 4(%esp), %al
        movzbl %al, %eax
        ret

More impressively, we now compile:

struct B { unsigned bit : 1; };
void xor(struct B *b) { b->bit = b->bit ^ 1; }

To (X86/PPC):

_xor:
        movl 4(%esp), %eax
        xorl $-2147483648, (%eax)
        ret
_xor:
        lwz r2, 0(r3)
        xoris r2, r2, 32768
        stw r2, 0(r3)
        blr

instead of (X86/PPC):

_xor:
        movl 4(%esp), %eax
        movl (%eax), %ecx
        movl %ecx, %edx
        shrl $31, %edx
        # TRUNCATE movb %dl, %dl
        xorb $1, %dl
        movzbl %dl, %edx
        andl $2147483647, %ecx
        shll $31, %edx
        orl %ecx, %edx
        movl %edx, (%eax)
        ret

_xor:
        lwz r2, 0(r3)
        srwi r4, r2, 31
        xori r4, r4, 1
        rlwimi r2, r4, 31, 0, 0
        stw r2, 0(r3)
        blr

This implements InstCombine/cast.ll:test30.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28273 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-13 02:06:03 +00:00
Chris Lattner
2144c25364 Remove some dead variables. 
Fix a nasty bug in the memcmp optimizer where we used the wrong variable!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28269 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 23:35:26 +00:00
Chris Lattner
a87e9cd069 Remove dead stuff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28268 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-12 23:32:01 +00:00
Chris Lattner
8c8c66a8cd Refactor some code, making it simpler. 
When doing the initial pass of constant folding, if we get a constantexpr,
simplify the constant expr like we would do if the constant is folded in the
normal loop.

This fixes the missed-optimization regression in
Transforms/InstCombine/getelementptr.ll last night.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28224 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-11 17:11:52 +00:00
Chris Lattner
f4f5a77fdc Two changes: 
1. Implement InstCombine/deadcode.ll by not adding instructions in unreachable
   blocks (due to constants in conditional branches/switches) to the worklist.
   This causes them to be deleted before instcombine starts up, leading to
   better optimization.

2. In the prepass over instructions, do trivial constprop/dce as we go.  This
   has the effect of improving the effectiveness of #1.  In addition, it
   *significantly* speeds up instcombine on test cases with large amounts of
   constant folding code (for example, that produced by code specialization
   or partial evaluation).  In one example, it speeds up instcombine from
   0.0589s to 0.0224s with a release build (a 2.6x speedup).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28215 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-10 19:00:36 +00:00
Chris Lattner
8d89e7bdbc Patch to make some xforms preserve each other. Patch contributed by 
Domagoj Babic!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28181 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-09 04:13:41 +00:00
Chris Lattner
33a6113995 Move some code around. 
Make the "fold (and (cast A), (cast B)) -> (cast (and A, B))" transformation
only apply when both casts really will cause code to be generated.  If one or
both doesn't, then this xform doesn't remove a cast.

This fixes Transforms/InstCombine/2006-05-06-Infloop.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28141 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-06 09:00:16 +00:00
Chris Lattner
581a7ad7c9 Fix an infinite loop compiling oggenc last night. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28128 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-05 20:51:30 +00:00
Chris Lattner
6fc205fc44 Implement InstCombine/cast.ll:test29 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28126 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-05 06:39:07 +00:00
Chris Lattner
e3158308e0 Fix Transforms/InstCombine/2006-05-04-DemandedBitCrash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28101 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-04 17:33:35 +00:00
Chris Lattner
b3674e4753 Add pass ID's for various passes, so they can be AddRequiredID. Patch by 
Domagoj Babic!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28048 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-05-02 04:24:36 +00:00
Chris Lattner
94046b4d10 Fix InstCombine/2006-04-28-ShiftShiftLongLong.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28019 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-28 22:21:41 +00:00
Chris Lattner
ae74f55552 Fix Transforms/Reassociate/2006-04-27-ReassociateVector.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28007 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-28 04:14:49 +00:00
Chris Lattner
d929f06f4d Add support for inserting undef into a vector. This implements 
Transforms/InstCombine/vec_insert_to_shuffle.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27997 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-27 21:14:21 +00:00
Chris Lattner
634c76c08c Fix some nondeterminstic behavior in the mem2reg pass that (in addition to 
nondeterminism being bad) could cause some trivial missed optimizations (dead
phi nodes being left around for later passes to clean up).

With this, llvm-gcc4 now bootstraps and correctly compares.  I don't know
why I never tried to do it before... :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27984 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-27 01:14:43 +00:00
Chris Lattner
df4f226cdc Fix Transforms/ScalarRepl/2006-04-20-PromoteCrash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27912 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-20 20:48:50 +00:00
Andrew Lenharth
7a31b975fb Make code match cvs commit message :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27881 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-20 15:41:37 +00:00
Andrew Lenharth
8117f9a40e If we can convert the return pointer type into an integer that IntPtrType 
can be converted to losslessly, we can continue the conversion to a direct call.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27880 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-20 14:56:47 +00:00
Chris Lattner
fd6bdf0b0f Turn x86 unaligned load/store intrinsics into aligned load/store instructions 
if the pointer is known aligned.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27781 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-17 22:26:56 +00:00
Chris Lattner
7f6cc0ccb5 Fix a bug in the 'shuffle(undef,x,mask) -> shuffle(x, undef,mask')' xform 
Make the insert/extract elt -> shuffle code more aggressive.

This fixes CodeGen/PowerPC/vec_shuffle.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27728 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-16 00:51:47 +00:00
Chris Lattner
706126dac1 Canonicalize shuffle(undef,x,mask) -> shuffle(x, undef,mask'). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27727 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-16 00:03:56 +00:00
Chris Lattner
efb47359ff significant cleanups to code that uses insert/extractelt heavily. This builds 
maximal shuffles out of them where possible.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27717 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-15 01:39:45 +00:00
Chris Lattner
de6df88529 Teach scalarrepl to promote unions of vectors and floats, producing 
insert/extractelement operations.  This implements
Transforms/ScalarRepl/vector_promote.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27710 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-14 21:42:41 +00:00
Andrew Lenharth
61e99c9db8 linear -> constant time 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27652 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-13 13:43:31 +00:00
Reid Spencer
ad2072643a Get rid of a signed/unsigned compare warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27625 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-12 19:28:15 +00:00
Chris Lattner
9fb9213083 Turn casts into getelementptr's when possible. This enables SROA to be more 
aggressive in some cases where LLVMGCC 4 is inserting casts for no reason.

This implements InstCombine/cast.ll:test27/28.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27620 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-12 18:09:35 +00:00
Chris Lattner
389a6f58f7 Implement vec_shuffle.ll:test3 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27573 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-10 23:06:36 +00:00
Chris Lattner
a844fc4cb0 Implement InstCombine/vec_shuffle.ll:test[12] 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27571 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-10 22:45:52 +00:00
Andrew Lenharth
3433141a3e Add a simple pass to make sure that all (non-library) calls to malloc and free 
are visible to analysis as intrinsics.  That is, make sure someone doesn't pass
free around by address in some struct (as happens in say 176.gcc).

This doesn't get rid of any indirect calls, just ensure calls to free and malloc
are always direct.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27560 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-10 19:26:09 +00:00
Chris Lattner
543abdf1d0 Add supprot for shufflevector 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27513 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-08 01:19:12 +00:00
Chris Lattner
8960766d45 Fix inlining of insert/extract element constantexprs 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27478 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-07 04:41:03 +00:00
Chris Lattner
e2ed057562 Lower vperm(x,y, mask) -> shuffle(x,y,mask) if mask is constant. This allows 
us to compile oh-so-realistic stuff like this:

 vec_vperm(A, B, (vector unsigned char){14});

to:
        vspltb v0, v0, 14

instead of:

        vspltisb v0, 14
        vperm v0, v2, v1, v0


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27452 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-06 19:19:17 +00:00
Chris Lattner
4132afb0d2 vector casts of casts are eliminable. Transform this: 
%tmp = cast <4 x uint> %tmp to <4 x int>                ; <<4 x int>> [#uses=1]
        %tmp = cast <4 x int> %tmp to <4 x float>               ; <<4 x float>> [#uses=1]

into:

        %tmp = cast <4 x uint> %tmp to <4 x float>              ; <<4 x float>> [#uses=1]


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27355 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-02 05:43:13 +00:00
Chris Lattner
a1c3538537 Allow transforming this: 
%tmp = cast <4 x uint>* %testData to <4 x int>*         ; <<4 x int>*> [#uses=1]
        %tmp = load <4 x int>* %tmp             ; <<4 x int>> [#uses=1]

to this:

        %tmp = load <4 x uint>* %testData               ; <<4 x uint>> [#uses=1]
        %tmp = cast <4 x uint> %tmp to <4 x int>                ; <<4 x int>> [#uses=1]


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27353 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-02 05:37:12 +00:00
Chris Lattner
82ed58f9c4 Turn altivec lvx/stvx intrinsics into loads and stores. This allows the 
elimination of one load from this:

int AreSecondAndThirdElementsBothNegative( vector float *in ) {
#define QNaN 0x7FC00000
const vector unsigned int testData = (vector unsigned int)( QNaN, 0, 0, QNaN );
vector float test = vec_ld( 0, (float*) &testData );
return ! vec_any_ge( test, *in );
}

Now generating:

_AreSecondAndThirdElementsBothNegative:
        mfspr r2, 256
        oris r4, r2, 49152
        mtspr 256, r4
        li r4, lo16(LCPI1_0)
        lis r5, ha16(LCPI1_0)
        addi r6, r1, -16
        lvx v0, r5, r4
        stvx v0, 0, r6
        lvx v1, 0, r3
        vcmpgefp. v0, v0, v1
        mfcr r3, 2
        rlwinm r3, r3, 27, 31, 31
        xori r3, r3, 1
        cntlzw r3, r3
        srwi r3, r3, 5
        mtspr 256, r2
        blr


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27352 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-02 05:30:25 +00:00
Chris Lattner
7224f84c15 Adjust to change in Intrinsics.gen interface. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27344 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-02 03:35:01 +00:00
Chris Lattner
3805dea3fe add valuemapper support for inline asm 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27332 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-01 23:17:11 +00:00
Chris Lattner
ae1ab3989c Fix InstCombine/2006-04-01-InfLoop.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27330 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-01 22:05:01 +00:00
Chris Lattner
64daab56c2 Fold A^(B&A) -> (B&A)^A 
Fold (B&A)^A == ~B & A

This implements InstCombine/xor.ll:test2[56]


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27328 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-04-01 08:03:55 +00:00
Chris Lattner
6e6b0da303 If we can look through vector operations to find the scalar version of an 
extract_element'd value, do so.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27323 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-31 23:01:56 +00:00
Chris Lattner
1f13c88939 extractelement(undef,x) -> undef 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27300 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-31 18:25:14 +00:00
Chris Lattner
df084ff78b Fix Transforms/InstCombine/2006-03-30-ExtractElement.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27261 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-30 22:02:40 +00:00
Chris Lattner
49aaa6a8ee teach the inliner to work with packed constants 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27161 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-27 05:50:18 +00:00
Chris Lattner
98509ef3c7 Don't crash on packed logical ops 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27125 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-25 21:58:26 +00:00
Chris Lattner
98d9811db2 Fix spello 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27052 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-24 07:14:34 +00:00
Chris Lattner
0f862e50ae add the actual cost to the debug info 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27051 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-24 07:14:00 +00:00
Jim Laskey
4ca9757a39 Strip changes to llvm.dbg intrinsics. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26993 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-23 18:11:33 +00:00
Jim Laskey
930ac0606c Can't combine anymore - we don't have a chain through llvm.dbg intrinsics. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26992 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-23 18:10:42 +00:00
Chris Lattner
035c6a2356 silence a bogus gcc warning 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26953 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-03-22 17:27:24 +00:00