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3100 Commits

Author SHA1 Message Date
Reid Spencer
910f23f7d7 Shut up some compilers that can't accurately analyze variable usage 
correctly and emit "may be used uninitialized" warnings.

llvm-svn: 32756
 2006-12-23 19:17:57 +00:00
Reid Spencer
43c77d53ff For PR1065: 
Don't allow CmpInst instances to be processed in FoldSelectOpOp because
you can't easily swap their operands.

llvm-svn: 32753
 2006-12-23 18:58:04 +00:00
Reid Spencer
266e42b312 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.

llvm-svn: 32751
 2006-12-23 06:05:41 +00:00
Chris Lattner
f171af97d5 add a simple fast-path for dead allocas 
llvm-svn: 32750
 2006-12-22 23:14:42 +00:00
Reid Spencer
a276d0972c Remove isSigned calls via foreknowledge of main's argument types. 
llvm-svn: 32730
 2006-12-21 07:49:49 +00:00
Reid Spencer
4720d4d9ef Get rid of a useless if statement whose then and else blocks were identical. 
llvm-svn: 32729
 2006-12-21 07:15:54 +00:00
Chris Lattner
1847f6ddbd 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

llvm-svn: 32715
 2006-12-20 06:21:33 +00:00
Chris Lattner
575d3218ab switch statistics over to not use static ctors. 
llvm-svn: 32709
 2006-12-19 23:16:47 +00:00
Chris Lattner
1fa216f572 eliminate static ctor from example. 
llvm-svn: 32696
 2006-12-19 22:24:09 +00:00
Chris Lattner
40b29cac01 remove dead statistic 
llvm-svn: 32695
 2006-12-19 22:23:21 +00:00
Chris Lattner
45f966d80f switch more statistics over to STATISTIC, eliminating static ctors. Also, 
delete some dead ones.

llvm-svn: 32694
 2006-12-19 22:17:40 +00:00
Chris Lattner
1631bcb1d4 Eliminate static ctors due to Statistic objects 
llvm-svn: 32693
 2006-12-19 22:09:18 +00:00
Chris Lattner
0e5255bdc6 Convert more Statistic's over to STATISTIC 
llvm-svn: 32692
 2006-12-19 21:49:03 +00:00
Chris Lattner
79a42ac941 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.

llvm-svn: 32690
 2006-12-19 21:40:18 +00:00
Reid Spencer
668d90f289 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.

llvm-svn: 32654
 2006-12-18 08:47:13 +00:00
Reid Spencer
b83593e3ea Convert the last use of two-argument ConstantExpr::getCast into another 
form so we can remove that method from ConstantExpr.

llvm-svn: 32652
 2006-12-18 08:16:27 +00:00
Bill Wendling
a77f14265b Added an automatic cast to "std::ostream*" etc. from OStream. We then can 
rework the hacks that had us passing OStream in. We pass in std::ostream*
instead, check for null, and then dispatch to the correct print() method.

llvm-svn: 32636
 2006-12-17 05:15:13 +00:00
Chris Lattner
fd5f03ec3f when inserting a dummy argument to work-around the CBE not supporting 
zero arg vararg functions, pass undef instead of 'int 0', which is cheaper.

llvm-svn: 32634
 2006-12-16 21:21:53 +00:00
Chris Lattner
8f7b775bf4 re-enable a temporarily-reverted patch 
llvm-svn: 32595
 2006-12-15 07:32:38 +00:00
Reid Spencer
74a528b427 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.

llvm-svn: 32548
 2006-12-13 18:21:21 +00:00
Reid Spencer
2a499b0b6c Implement review feedback. Most of this has to do with removing unnecessary 
cast instructions. A few are bug fixes.

llvm-svn: 32544
 2006-12-13 17:19:09 +00:00
Reid Spencer
612683b0d7 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.

llvm-svn: 32539
 2006-12-13 08:33:33 +00:00
Reid Spencer
799b5bfc71 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.

llvm-svn: 32538
 2006-12-13 08:27:15 +00:00
Reid Spencer
df1f19a8ef 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.

llvm-svn: 32535
 2006-12-13 08:06:42 +00:00
Reid Spencer
a730cf80d7 Fix some casts. isdigit(c) returns 0 or 1, not 0 or -1 
llvm-svn: 32534
 2006-12-13 08:04:32 +00:00
Chris Lattner
7c1dff99dc 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.

llvm-svn: 32524
 2006-12-13 02:26:45 +00:00
Reid Spencer
bfe26ffcfc Replace CastInst::createInferredCast calls with more accurate cast 
creation calls.

llvm-svn: 32521
 2006-12-13 00:50:17 +00:00
Reid Spencer
bb65ebf9a1 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.

llvm-svn: 32514
 2006-12-12 23:36:14 +00:00
Chris Lattner
2dc148e89d this can be trunc or bitcast, per line 3092. 
llvm-svn: 32487
 2006-12-12 19:11:20 +00:00
Chris Lattner
ade1f6894d Fix regression on 400.perlbench last night. 
llvm-svn: 32486
 2006-12-12 18:41:03 +00:00
Reid Spencer
13bc5d7b57 Fix numerous inferred casts. 
llvm-svn: 32479
 2006-12-12 09:18:51 +00:00
Reid Spencer
41cb269a2b Fix the casting for the computation of the Malloc size. 
llvm-svn: 32477
 2006-12-12 09:17:08 +00:00
Reid Spencer
b341b0861d Change inferred getCast into specific getCast. Passes all tests. 
llvm-svn: 32469
 2006-12-12 05:05:00 +00:00
Chris Lattner
6e5fe376ec Patch for PR1045 and Transforms/ScalarRepl/2006-12-11-SROA-Crash.ll 
llvm-svn: 32468
 2006-12-12 04:24:41 +00:00
Chris Lattner
e810140c4b trunc to integer, not to FP. 
llvm-svn: 32426
 2006-12-11 01:17:00 +00:00
Chris Lattner
23f4b68f7e implement promotion of unions containing two packed types of the same width. 
This implements Transforms/ScalarRepl/union-packed.ll

llvm-svn: 32422
 2006-12-11 00:35:08 +00:00
Chris Lattner
216c3028e6 * 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

llvm-svn: 32418
 2006-12-10 23:56:50 +00:00
Reid Spencer
efe5c862f1 Incorporate any changes in the successor blocks into the result of 
MarkAliveBlocks.

llvm-svn: 32375
 2006-12-08 21:52:01 +00:00
Bill Wendling
9bfb1e1f29 What should be the last unnecessary <iostream>s in the library. 
llvm-svn: 32333
 2006-12-07 22:21:48 +00:00
Bill Wendling
22e978a736 Removing even more <iostream> includes. 
llvm-svn: 32320
 2006-12-07 20:04:42 +00:00
Bill Wendling
f3baad3ee1 Changed llvm_ostream et all to OStream. llvm_cerr, llvm_cout, llvm_null, are 
now cerr, cout, and NullStream resp.

llvm-svn: 32298
 2006-12-07 01:30:32 +00:00
Reid Spencer
4ae56f3086 Update ConstantIntegral Max/Min tests for new interface. 
llvm-svn: 32288
 2006-12-06 20:39:57 +00:00
Chris Lattner
f06bb658a8 add missing #include 
llvm-svn: 32280
 2006-12-06 18:14:47 +00:00
Chris Lattner
700b873130 Detemplatize the Statistic class. The only type it is instantiated with 
is 'unsigned'.

llvm-svn: 32279
 2006-12-06 17:46:33 +00:00
Chris Lattner
edcc8c2f8b Remove the 'printname' argument to WriteAsOperand. It is always true, and 
passing false would make the asmprinter fail anyway.

llvm-svn: 32264
 2006-12-06 06:16:21 +00:00
Chris Lattner
ec58903623 counter should be unsigned. 
llvm-svn: 32252
 2006-12-06 01:50:04 +00:00
Chris Lattner
c209b584eb 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.

llvm-svn: 32209
 2006-12-05 01:26:29 +00:00
Devang Patel
21efc73161 SCCP does not handle Packed Type properly. Disable Packed Type handling 
for now.

llvm-svn: 32208
 2006-12-04 23:54:59 +00:00
Reid Spencer
14fbdd5523 Update call to CastInst::getCastOpcode for its new signature. 
llvm-svn: 32166
 2006-12-04 02:48:01 +00:00
Jeff Cohen
cc08c83186 Unbreak VC++ build. 
llvm-svn: 32113
 2006-12-02 02:22:01 +00:00