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1387 Commits

Author SHA1 Message Date
Reid Spencer
ee5d25e5cc Fix a typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32803 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-31 22:26:06 +00:00
Reid Spencer
c5b206b6be For PR950: 
This patch replaces signed integer types with signless ones:
1. [US]Byte -> Int8
2. [U]Short -> Int16
3. [U]Int   -> Int32
4. [U]Long  -> Int64.
5. Removal of isSigned, isUnsigned, getSignedVersion, getUnsignedVersion
   and other methods related to signedness. In a few places this warranted
   identifying the signedness information from other sources.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32785 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-31 05:48:39 +00:00
Reid Spencer
0f9d82c5c4 For PR1066: 
Fix this by ensuring that a bitcast is inserted to do sign switching. This
is only temporarily needed as the merging of signed and unsigned is next
on the SignlessTypes plate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32757 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-24 00:40:59 +00:00
Reid Spencer
b3307b232a Shut up some compilers that can't accurately analyze variable usage 
correctly and emit "may be used uninitialized" warnings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32756 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-23 19:17:57 +00:00
Reid Spencer
1b0d847874 For PR1065: 
Don't allow CmpInst instances to be processed in FoldSelectOpOp because
you can't easily swap their operands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32753 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-23 18:58:04 +00:00
Reid Spencer
e4d87aa2de For PR950: 
This patch removes the SetCC instructions and replaces them with the ICmp
and FCmp instructions. The SetCondInst instruction has been removed and
been replaced with ICmpInst and FCmpInst.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32751 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-23 06:05:41 +00:00
Chris Lattner
add2bd7f59 add a simple fast-path for dead allocas 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32750 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-22 23:14:42 +00:00
Chris Lattner
3bad2533bb handle undef values much more carefully: generalize the resolveundefbranches 
code to handle instructions as well, so that we properly fold things like
X & undef -> 0.
This fixes Transforms/SCCP/2006-12-19-UndefBug.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32715 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-20 06:21:33 +00:00
Chris Lattner
438e08e357 Convert more Statistic's over to STATISTIC 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32692 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-19 21:49:03 +00:00
Chris Lattner
0e5f499638 Switch over Transforms/Scalar to use the STATISTIC macro. For each statistic 
converted, we lose a static initializer.  This also allows GCC to emit warnings
about unused statistics.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32690 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-19 21:40:18 +00:00
Reid Spencer
8a903db499 Convert the last uses of CastInst::createInferredCast to a normal cast 
creation. These changes are still temporary but at least this pushes
knowledge of signedness out closer to where it can be determined properly
and allows signedness to be removed from VMCore.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32654 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-18 08:47:13 +00:00
Chris Lattner
d22dbdf606 re-enable a temporarily-reverted patch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32595 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-15 07:32:38 +00:00
Reid Spencer
c55b243bcd Fix a bug in EvaluateInDifferentType. The type of operand should not be 
used to determine whether a ZExt or SExt cast is performed. Instead, pass
an "isSigned" bool to the function and determine its value from the opcode
of the cast involved.
Also, clean up some cruft from previous patches.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32548 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-13 18:21:21 +00:00
Reid Spencer
7eb7638276 Implement review feedback. Most of this has to do with removing unnecessary 
cast instructions. A few are bug fixes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32544 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-13 17:19:09 +00:00
Reid Spencer
21a55c9f08 For mul transforms, when checking for a cast from bool as either operand, 
make sure to also check that it is a zext from bool, not any other cast
operation type.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32539 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-13 08:33:33 +00:00
Reid Spencer
5ae9cebef5 Fix and/or/xor (cast A), (cast B) --> cast (and/or/xor A, B) 
The cast patch introduced the possibility that the wrong cast opcode
could be used and that this transform could trigger on different kinds
of cast operations. This patch rectifies that.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32538 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-13 08:27:15 +00:00
Reid Spencer
3ba68b9eef Change the interface to SCEVExpander::InsertCastOfTo to take a cast opcode 
so the decision of which opcode to use is pushed upward to the caller.
Adjust the callers to pass the expected opcode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32535 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-13 08:06:42 +00:00
Chris Lattner
21c362d324 revert my recent int<->fp and vector union promotion changes, they expose 
obscure bugs affecting the X86 code generator.  I will reenable this
when fixed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32524 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-13 02:26:45 +00:00
Reid Spencer
7b06bd532d Replace CastInst::createInferredCast calls with more accurate cast 
creation calls.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32521 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-13 00:50:17 +00:00
Reid Spencer
d977d8651a Replace inferred getCast(V,Ty) calls with more strict variants. 
Rename getZeroExtend and getSignExtend to getZExt and getSExt to match
the the casting mnemonics in the rest of LLVM.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32514 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-12 23:36:14 +00:00
Chris Lattner
bb4e7b2fa4 this can be trunc or bitcast, per line 3092. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32487 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-12 19:11:20 +00:00
Chris Lattner
078b631ff3 Fix regression on 400.perlbench last night. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32486 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-12 18:41:03 +00:00
Reid Spencer
17212df0ee Fix numerous inferred casts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32479 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-12 09:18:51 +00:00
Reid Spencer
4da49122f3 Change inferred getCast into specific getCast. Passes all tests. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32469 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-12 05:05:00 +00:00
Chris Lattner
a30fc5ed04 Patch for PR1045 and Transforms/ScalarRepl/2006-12-11-SROA-Crash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32468 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-12 04:24:41 +00:00
Chris Lattner
509f85140c trunc to integer, not to FP. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32426 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-11 01:17:00 +00:00
Chris Lattner
1dbea1598c implement promotion of unions containing two packed types of the same width. 
This implements Transforms/ScalarRepl/union-packed.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32422 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-11 00:35:08 +00:00
Chris Lattner
ae6a305094 * Eliminate calls to CastInst::createInferredCast. 
* Add support for promoting unions with fp values in them.  This produces
   our new int<->fp bitcast instructions, implementing
   Transforms/ScalarRepl/union-fp-int.ll

As an example, this allows us to compile this:

union intfloat { int i; float f; };
float invsqrt(const float arg_x) {
    union intfloat x = { .f = arg_x };
    const float xhalf = arg_x * 0.5f;
    x.i = 0x5f3759df - (x.i >> 1);
    return x.f * (1.5f - xhalf * x.f * x.f);
}

into:

_invsqrt:
        movss 4(%esp), %xmm0
        movd %xmm0, %eax
        sarl %eax
        movl $1597463007, %ecx
        subl %eax, %ecx
        movd %ecx, %xmm1
        mulss LCPI1_0, %xmm0
        mulss %xmm1, %xmm0
        movss LCPI1_1, %xmm2
        mulss %xmm1, %xmm0
        subss %xmm0, %xmm2
        movl 8(%esp), %eax
        mulss %xmm2, %xmm1
        movss %xmm1, (%eax)
        ret

instead of:

_invsqrt:
        subl $4, %esp
        movss 8(%esp), %xmm0
        movss %xmm0, (%esp)
        movl (%esp), %eax
        movl $1597463007, %ecx
        sarl %eax
        subl %eax, %ecx
        movl %ecx, (%esp)
        mulss LCPI1_0, %xmm0
        movss (%esp), %xmm1
        mulss %xmm1, %xmm0
        mulss %xmm1, %xmm0
        movss LCPI1_1, %xmm2
        subss %xmm0, %xmm2
        mulss %xmm2, %xmm1
        movl 12(%esp), %eax
        movss %xmm1, (%eax)
        addl $4, %esp
        ret


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32418 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-10 23:56:50 +00:00
Reid Spencer
f7761e5c39 Incorporate any changes in the successor blocks into the result of 
MarkAliveBlocks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32375 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-08 21:52:01 +00:00
Bill Wendling
832171cb97 Removing even more <iostream> includes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32320 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-07 20:04:42 +00:00
Bill Wendling
e81561909d Changed llvm_ostream et all to OStream. llvm_cerr, llvm_cout, llvm_null, are 
now cerr, cout, and NullStream resp.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32298 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-07 01:30:32 +00:00
Reid Spencer
62700f250f Update ConstantIntegral Max/Min tests for new interface. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32288 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-06 20:39:57 +00:00
Chris Lattner
02fc40ebd3 add missing #include 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32280 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-06 18:14:47 +00:00
Chris Lattner
ac0b6ae358 Detemplatize the Statistic class. The only type it is instantiated with 
is 'unsigned'.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32279 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-06 17:46:33 +00:00
Chris Lattner
3749c9cae4 Remove the 'printname' argument to WriteAsOperand. It is always true, and 
passing false would make the asmprinter fail anyway.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32264 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-06 06:16:21 +00:00
Chris Lattner
e13ab2a9a1 add an instcombine xform. This speeds up 462.libquantum from 9.78s to 
7.48s.  This regression is due to unforseen consequences of the cast patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32209 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-05 01:26:29 +00:00
Devang Patel
67a821d9a3 SCCP does not handle Packed Type properly. Disable Packed Type handling 
for now.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32208 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-04 23:54:59 +00:00
Reid Spencer
3b3844288b Update call to CastInst::getCastOpcode for its new signature. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32166 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-04 02:48:01 +00:00
Jeff Cohen
97af751deb Unbreak VC++ build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32113 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-02 02:22:01 +00:00
Chris Lattner
9919e3df17 disable transformations that are invalid for fp vectors. This fixes 
Transforms/InstCombine/2006-12-01-BadFPVectorXform.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32112 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-02 00:13:08 +00:00
Reid Spencer
44c030a7ee Remove 4 FIXMEs to hack around cast-to-bool problems which no longer exist. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32051 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-30 23:13:36 +00:00
Chris Lattner
46b96055cf implement cast.ll:test35. With this, we recognize: 
unsigned short swp(unsigned short a) {
       return ((a & 0xff00) >> 8 | (a & 0x00ff) << 8);
}

as an idiom for bswap.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32011 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-29 07:18:39 +00:00
Chris Lattner
6aa5eb19d5 Teach instcombine to turn trunc(srl x, c) -> srl (trunc(x), c) when safe. 
This implements InstCombine/cast.ll:test34.  It fires hundreds of times on
176.gcc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32009 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-29 07:04:07 +00:00
Chris Lattner
458cf462ef Implement Regression/Transforms/InstCombine/bswap-fold.ll, 
folding   seteq (bswap(x)), c -> seteq(x,bswap(c))


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32006 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-29 05:02:16 +00:00
Reid Spencer
de33124aa3 Join a split line. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31996 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-29 01:11:01 +00:00
Reid Spencer
d4d9ab80b7 Undo the last patch until 253.perlbmk passes with these changes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31977 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-28 20:23:51 +00:00
Reid Spencer
5d4dbd1f60 Remove 4 FIXME's from the CAST patch now that the back end is correctly 
producing code for "trunc to bool". This passes all tests on Linux.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31963 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-28 07:23:01 +00:00
Chris Lattner
f2f1643037 Fix PR1014 and InstCombine/2006-11-27-XorBug.ll. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31941 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-27 19:55:07 +00:00
Reid Spencer
3da59db637 For PR950: 
The long awaited CAST patch. This introduces 12 new instructions into LLVM
to replace the cast instruction. Corresponding changes throughout LLVM are
provided. This passes llvm-test, llvm/test, and SPEC CPUINT2000 with the
exception of 175.vpr which fails only on a slight floating point output
difference.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31931 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-27 01:05:10 +00:00
Bill Wendling
b742703137 Removed #include <iostream> and replaced with llvm_* streams. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31923 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-26 09:46:52 +00:00
Nick Lewycky
565706b93e Update to new predicate simplifier VRP design. Fixes PR966 and PR967. 
Remove predicate simplifier from default gcc3 pipeline. New design is too
slow to enable by default.
Add new testcases for problems encountered in development.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31895 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-22 23:49:16 +00:00
Chris Lattner
13c654a42a This xform is handled by FoldOpIntoPhi in visitCastInst in a more elegant way. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31889 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-21 17:05:13 +00:00
Chris Lattner
020f714a93 If an indvar with a variable stride is used by the exit condition, go ahead 
and handle it like constant stride vars.  This fixes some bad codegen in
variable stride cases.  For example, it compiles this:

void foo(int k, int i) {
  for (k=i+i; k <= 8192; k+=i)
    flags2[k] = 0;
}

to:

LBB1_1: #bb.preheader
        movl %eax, %ecx
        addl %ecx, %ecx
        movl L_flags2$non_lazy_ptr, %edx
LBB1_2: #bb
        movb $0, (%edx,%ecx)
        addl %eax, %ecx
        cmpl $8192, %ecx
        jle LBB1_2      #bb
LBB1_5: #return
        ret

or (if the array is local and we are in dynamic-nonpic or static mode):

LBB3_2: #bb
        movb $0, _flags2(%ecx)
        addl %eax, %ecx
        cmpl $8192, %ecx
        jle LBB3_2      #bb

and:

        lis r2, ha16(L_flags2$non_lazy_ptr)
        lwz r2, lo16(L_flags2$non_lazy_ptr)(r2)
        slwi r3, r4, 1
LBB1_2: ;bb
        li r5, 0
        add r6, r4, r3
        stbx r5, r2, r3
        cmpwi cr0, r6, 8192
        bgt cr0, LBB1_5 ;return

instead of:

        leal (%eax,%eax,2), %ecx
        movl %eax, %edx
        addl %edx, %edx
        addl L_flags2$non_lazy_ptr, %edx
        xorl %esi, %esi
LBB1_2: #bb
        movb $0, (%edx,%esi)
        movl %eax, %edi
        addl %esi, %edi
        addl %ecx, %esi
        cmpl $8192, %esi
        jg LBB1_5       #return

and:

        lis r2, ha16(L_flags2$non_lazy_ptr)
        lwz r2, lo16(L_flags2$non_lazy_ptr)(r2)
        mulli r3, r4, 3
        slwi r5, r4, 1
        li r6, 0
        add r2, r2, r5
LBB1_2: ;bb
        li r5, 0
        add r7, r3, r6
        stbx r5, r2, r6
        add r6, r4, r6
        cmpwi cr0, r7, 8192
        ble cr0, LBB1_2 ;bb

This speeds up Benchmarks/Shootout/sieve from 8.533s to 6.464s and
implements LoopStrengthReduce/var_stride_used_by_compare.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31809 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-17 06:17:33 +00:00
Chris Lattner
d23b5baf8a Fix a gcc 4.2 warning. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31751 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-15 04:53:24 +00:00
Chris Lattner
e511b74f4a implement InstCombine/shift-simplify.ll by transforming: 
(X >> Z) op (Y >> Z)  -> (X op Y) >> Z

for all shifts and all ops={and/or/xor}.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31729 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-14 07:46:50 +00:00
Chris Lattner
9c2328e5a9 implement InstCombine/and-compare.ll:test1. This compiles: 
typedef struct { unsigned prefix : 4; unsigned code : 4; unsigned unsigned_p : 4; } tree_common;
int foo(tree_common *a, tree_common *b) { return a->code == b->code; }

into:

_foo:
        movl 4(%esp), %eax
        movl 8(%esp), %ecx
        movl (%eax), %eax
        xorl (%ecx), %eax
        # TRUNCATE movb %al, %al
        shrb $4, %al
        testb %al, %al
        sete %al
        movzbl %al, %eax
        ret

instead of:

_foo:
        movl 8(%esp), %eax
        movb (%eax), %al
        shrb $4, %al
        movl 4(%esp), %ecx
        movb (%ecx), %cl
        shrb $4, %cl
        cmpb %al, %cl
        sete %al
        movzbl %al, %eax
        ret

saving one cycle by eliminating a shift.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31727 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-14 06:06:06 +00:00
Chris Lattner
de2b6605ba Fix InstCombine/2006-11-10-ashr-miscompile.ll a miscompilation introduced 
by the shr -> [al]shr patch.  This was reduced from 176.gcc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31653 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-10 23:38:52 +00:00
Chris Lattner
b4a2f059ad Teach ShrinkDemandedConstant how to handle X+C. This implements: 
add.ll:test33, add.ll:test34, shift-sra.ll:test2


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31586 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-09 05:12:27 +00:00
Chris Lattner
53738a4dbf reenable factoring of GEP expressions, being more precise about the 
case that it bad to do.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31563 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-08 19:42:28 +00:00
Chris Lattner
f6fd94d3fa make this code more efficient by not creating a phi node we are just going to 
delete in the first place.  This also makes it simpler.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31562 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-08 19:29:23 +00:00
Chris Lattner
f0cd7085c1 disable this factoring optzn for GEPs for now, this severely pessimizes some 
loops.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31560 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-08 18:49:31 +00:00
Reid Spencer
3822ff5c71 For PR950: 
This patch converts the old SHR instruction into two instructions,
AShr (Arithmetic) and LShr (Logical). The Shr instructions now are not
dependent on the sign of their operands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31542 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-08 06:47:33 +00:00
Chris Lattner
d92515034f scalarrepl should not split the two elements of the vsiidx array: 
int func(vFloat v0, vFloat v1) {
        int ii;
        vSInt32 vsiidx[2];
        vsiidx[0] = _mm_cvttps_epi32(v0);
        vsiidx[1] = _mm_cvttps_epi32(v1);
        ii = ((int *) vsiidx)[4];
        return ii;
}

This fixes Transforms/ScalarRepl/2006-11-07-InvalidArrayPromote.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31524 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-07 22:42:47 +00:00
Jeff Cohen
d41b30def3 Unbreak VC++ build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31464 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-05 19:31:28 +00:00
Nick Lewycky
8b2989ae91 Remove commented line from earlier debugging. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31460 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-05 14:19:40 +00:00
Andrew Lenharth
8ed4c47d70 The wrong parameter was being tested to deturmine i32 vs i64 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31431 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-03 22:45:50 +00:00
Chris Lattner
ffa0a9b7ea remove dead code 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31398 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-03 01:34:58 +00:00
Reid Spencer
3ed469ccd7 For PR786: 
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting
fall out by removing unused variables. Remaining warnings have to do with
unused functions (I didn't want to delete code without review) and unused
variables in generated code. Maintainers should clean up the remaining
issues when they see them. All changes pass DejaGnu tests and Olden.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31380 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-02 20:25:50 +00:00
Reid Spencer
0a783f783c For PR950: 
Replace the REM instruction with UREM, SREM and FREM.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31369 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-02 01:53:59 +00:00
Devang Patel
e0805a2d36 There can be more than one PHINode at the start of the block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31362 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-01 23:04:45 +00:00
Devang Patel
2c0565f8e0 Handle PHINode with only one incoming value. 
This fixes http://llvm.org/bugs/show_bug.cgi?id=979


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31358 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-01 22:26:43 +00:00
Chris Lattner
9c08050ac7 Factor gep instructions through phi nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31346 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-01 07:43:41 +00:00
Chris Lattner
76c7314650 Turn a phi of many loads into a phi of the address and a single load of the 
result.  This can significantly shrink code and exposes identities more
aggressively.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31344 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-01 07:13:54 +00:00
Chris Lattner
a90a24c623 Fix a bug in the previous patch 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31342 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-01 04:55:47 +00:00
Chris Lattner
7da52b295b Fold things like "phi [add (a,b), add(c,d)]" into two phi's and one add. 
This triggers thousands of times on multisource.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31341 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-11-01 04:51:18 +00:00
Chris Lattner
0997fadc37 break edges more intelligently 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31257 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-28 06:45:33 +00:00
Chris Lattner
f6de8ad1a2 SplitCriticalEdge checks to see if an edge is critical, don't check twice 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31255 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-28 06:38:14 +00:00
Chris Lattner
1b9c8e73b5 prepare for a change I'm about to make 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31248 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-28 00:59:20 +00:00
Reid Spencer
811b0cbd6e Simplify code a bit by changing instances of: 
InsertNewInstBefore(new CastInst(Val, ValTy, Val->GetName()), I)
into:
   InsertCastBefore(Val, ValTy, I)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31204 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-26 19:19:06 +00:00
Reid Spencer
1628cec4d7 For PR950: 
Make necessary changes to support DIV -> [SUF]Div. This changes llvm to
have three division instructions: signed, unsigned, floating point. The
bytecode and assembler are bacwards compatible, however.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31195 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-26 06:15:43 +00:00
Nick Lewycky
7043d00750 Fix 2006-10-25-AddSetCC. A relational operator (like setlt) can never 
produce an EQ property.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31193 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-26 02:35:18 +00:00
Nick Lewycky
e63bf95a32 Resurrect r1.25. 
Fix and comment the "or", "and" and "xor" transformations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31189 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-25 23:48:24 +00:00
Chris Lattner
b67e8f2263 hide symbols properly 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31184 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-25 21:14:31 +00:00
Chris Lattner
ae5d51c9c9 Fix Transforms/ScalarRepl/2006-10-23-PointerUnionCrash.ll 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31151 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-24 06:26:32 +00:00
Chris Lattner
ef2aa193d6 Revert back to r1.21, which was the last revision of predsimplify that 
passes llvm-gcc bootstrap.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31146 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-24 00:36:21 +00:00
Chris Lattner
ddaaa37487 Handle fallout from the recent branch-on-undef changes. This fixes 
Prolangs-C/agrep and SCCP/2006-10-23-IPSCCP-Crash.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31132 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-23 18:57:02 +00:00
Nick Lewycky
c17229d591 Remove the Backwards operation. Resolving now works at the time when a 
property is added by running through the list of uses of the value and
adding resolved properties to the property set.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31126 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-23 01:56:02 +00:00
Nick Lewycky
7e189d095e Fix similar missing optimization opportunity in XOR. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31123 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-22 22:22:58 +00:00
Nick Lewycky
92a8b71dc1 Whoops! Add missing NULL check. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31121 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-22 21:38:24 +00:00
Nick Lewycky
5062250f36 Handle "if ((x|y) != 0)" for ints like we do for bools. Fixes missed 
optimization opportunity pointed out by Chris Lattner.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31118 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-22 21:36:41 +00:00
Nick Lewycky
802fe27d3e AllocaInst can't return a null pointer. Fixes missed optimization 
opportunity pointed out by Andrew Lewycky.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31115 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-22 19:53:27 +00:00
Chris Lattner
32b1e87f11 Add a workaround for PR962, disabling the more aggressive form of this 
transformation.  This speeds up a C++ app 2.25x.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31113 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-22 18:42:26 +00:00
Chris Lattner
d2d86703f0 3 Changes: 
1. Better document what is going on here.
2. Only hack on one branch per iteration, making the results less conservative.
3. Handle the problematic case by marking edges executable instead of by
   playing with value lattice states.  This is far less pessimistic, and fixes
   SCCP/ipsccp-gvar.ll.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31106 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-22 05:59:17 +00:00
Chris Lattner
6734bffe24 Fix an ugly problem in SCCP. This fixes Benchmarks/Misc-C++/mandel-text.cpp 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31073 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-20 20:19:08 +00:00
Chris Lattner
87d8429506 Fix miscompilation of MallocBench/espresso which code review pointed out 
but apparently didn't make it into the final patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31070 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-20 18:20:21 +00:00
Reid Spencer
b83eb6447b For PR950: 
This patch implements the first increment for the Signless Types feature.
All changes pertain to removing the ConstantSInt and ConstantUInt classes
in favor of just using ConstantInt.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31063 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-20 07:07:24 +00:00
Devang Patel
6e7dd9db6b While creating mask, use 1ULL instead of 1. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31062 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-20 01:16:56 +00:00
Devang Patel
002e499650 It is OK to remove extra cast if operation is EQ/NE even though source 
and destination sign may not match but other conditions are met.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31056 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-19 20:59:13 +00:00
Devang Patel
df308fa7ab Typo Typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31055 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-19 19:21:36 +00:00
Devang Patel
85415ed270 Typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31054 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-10-19 19:05:38 +00:00