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827 Commits

Author SHA1 Message Date
Chris Lattner d4fef8dbca Implement shift-simplify.ll:test[45]. 
First teach instcombine that sign bit checks only demand the 
sign bit, this allows simplify demanded bits to hack on 
expressions better.

Second, teach instcombine that ashr is useless if only the
sign bit is demanded.

llvm-svn: 39880
 2007-07-15 20:54:51 +00:00
Chris Lattner 06205d5567 Implement shift-simplify.ll:test3, turning: 
(X << 31) <s 0  --> (X&1) != 0

This happens dozens of times in the CFE.

llvm-svn: 39879
 2007-07-15 20:42:37 +00:00
Chris Lattner fb032b176b Significantly improve the documentation of the instcombine divide/compare 
transformation.  Also, keep track of which end of the integer interval overflows
occur on.  This fixes Transforms/InstCombine/2007-06-21-DivCompareMiscomp.ll
and rdar://5278853, a miscompilation of perl.

llvm-svn: 37692
 2007-06-21 18:11:19 +00:00
Chris Lattner 3bbec59e8b refactor a bunch of code out of visitICmpInstWithInstAndIntCst into its own 
routine.

llvm-svn: 37679
 2007-06-20 23:46:26 +00:00
Chris Lattner 09a33a4f64 silence a bogus warning Duraid ran into. 
llvm-svn: 37649
 2007-06-19 05:43:49 +00:00
Chris Lattner 373389260f Generalize many transforms to work on ~ of vectors in addition to ~ of 
integer ops.  This implements Transforms/InstCombine/and-or-not.ll
test3/test4, and finishes off PR1510

llvm-svn: 37589
 2007-06-15 06:23:19 +00:00
Chris Lattner 481e28b1f5 Implement two xforms: 
1. ~(~X | Y) === (X & ~Y)
2. (A|B) & ~(A&B) -> A^B

This allows us to transform  ~(~(a|b) | (a&b)) -> a^b.

This implements PR1510 for scalar values.

llvm-svn: 37584
 2007-06-15 05:58:24 +00:00
Chris Lattner f14e5175ed delete some obviously dead vector operations, which deletes a few thousand 
operations from Duraids example.

llvm-svn: 37582
 2007-06-15 05:26:55 +00:00
Lauro Ramos Venancio 368e8872db Fix PR1499. 
llvm-svn: 37472
 2007-06-06 17:08:48 +00:00
Chris Lattner f79577d314 fix a miscompilation when passing a float through varargs 
llvm-svn: 37297
 2007-05-23 01:17:04 +00:00
Chris Lattner a655a157a0 Fix Transforms/InstCombine/2007-05-18-CastFoldBug.ll, a bug that devastates 
objc code due to the way the FE lowers objc message sends.

llvm-svn: 37256
 2007-05-19 06:51:32 +00:00
Chris Lattner 234f96daa8 Fix Transforms/InstCombine/2007-05-14-Crash.ll 
llvm-svn: 37057
 2007-05-15 00:16:00 +00:00
Dan Gohman b5650ebd6a Fix typos. 
llvm-svn: 36994
 2007-05-11 21:10:54 +00:00
Chris Lattner 600db3eb96 fix regressions from my previous checking, including 
Transforms/InstCombine/2006-12-08-ICmp-Combining.ll

llvm-svn: 36989
 2007-05-11 16:58:45 +00:00
Chris Lattner fe2b44de9f fix Transforms/InstCombine/2007-05-10-icmp-or.ll 
llvm-svn: 36984
 2007-05-11 05:55:56 +00:00
Nick Lewycky e7da2d6ac3 Fix typo in comment. 
llvm-svn: 36873
 2007-05-06 13:37:16 +00:00
Chris Lattner 9b35b3e863 Fix a bug in my previous patch 
llvm-svn: 36857
 2007-05-06 07:24:03 +00:00
Chris Lattner 5aa73fe34c Implement Transforms/InstCombine/cast_ptr.ll 
llvm-svn: 36809
 2007-05-05 22:41:33 +00:00
Chris Lattner 361e981415 wrap long lines 
llvm-svn: 36807
 2007-05-05 22:32:24 +00:00
Chris Lattner 5c827bda0d Fix InstCombine/2007-05-04-Crash.ll and PR1384 
llvm-svn: 36775
 2007-05-05 01:59:31 +00:00
Devang Patel 8c78a0bff0 Drop 'const' 
llvm-svn: 36662
 2007-05-03 01:11:54 +00:00
Devang Patel e95c6ad802 Use 'static const char' instead of 'static const int'. 
Due to darwin gcc bug, one version of darwin linker coalesces
static const int, which defauts PassID based pass identification.

llvm-svn: 36652
 2007-05-02 21:39:20 +00:00
Devang Patel 09f162ca6a Do not use typeinfo to identify pass in pass manager. 
llvm-svn: 36632
 2007-05-01 21:15:47 +00:00
Chris Lattner 089e35cc57 fix a bug triggered by 403.gcc 
llvm-svn: 36527
 2007-04-28 05:27:36 +00:00
Chris Lattner 6e880871e9 Fix several latent bugs in EmitGEPOffset that didn't manifest with its 
previous clients.  This fixes MallocBench/gs

llvm-svn: 36525
 2007-04-28 04:52:43 +00:00
Chris Lattner c753800800 uhn zap cvs 
llvm-svn: 36523
 2007-04-28 03:50:56 +00:00
Chris Lattner acbf6a401d Implement PR1345 and Transforms/InstCombine/bitcast-gep.ll 
llvm-svn: 36521
 2007-04-28 00:57:34 +00:00
Chris Lattner 1db224db92 refactor some code relating to pointer cast xforms, pulling it out of the codepath 
for unrelated casts.

llvm-svn: 36511
 2007-04-27 17:44:50 +00:00
Zhou Sheng aafe4e216e Make use of ConstantInt::isZero instead of ConstantInt::isNullValue. 
llvm-svn: 36261
 2007-04-19 05:39:12 +00:00
Chris Lattner 4a6e0cbd41 Extend store merging to support the 'if/then' version in addition to if/then/else. 
This sinks the two stores in this example into a single store in cond_next.  In this
case, it allows elimination of the load as well:

        store double 0.000000e+00, double* @s.3060
        %tmp3 = fcmp ogt double %tmp1, 5.000000e-01             ; <i1> [#uses=1]
        br i1 %tmp3, label %cond_true, label %cond_next
cond_true:              ; preds = %entry
        store double 1.000000e+00, double* @s.3060
        br label %cond_next
cond_next:              ; preds = %entry, %cond_true
        %tmp6 = load double* @s.3060            ; <double> [#uses=1]

This implements Transforms/InstCombine/store-merge.ll:test2

llvm-svn: 36040
 2007-04-15 01:02:18 +00:00
Chris Lattner 14a251b937 refactor some code, no functionality change. 
llvm-svn: 36037
 2007-04-15 00:07:55 +00:00
Chris Lattner 28d921d04f fix long lines 
llvm-svn: 36031
 2007-04-14 23:32:02 +00:00
Chris Lattner 7bfdd0abe1 Implement Transforms/InstCombine/vec_extract_elt.ll, transforming: 
define i32 @test(float %f) {
        %tmp7 = insertelement <4 x float> undef, float %f, i32 0
        %tmp17 = bitcast <4 x float> %tmp7 to <4 x i32>
        %tmp19 = extractelement <4 x i32> %tmp17, i32 0
        ret i32 %tmp19
}

into:

define i32 @test(float %f) {
        %tmp19 = bitcast float %f to i32                ; <i32> [#uses=1]
        ret i32 %tmp19
}

On PPC, this is the difference between:

_test:
        mfspr r2, 256
        oris r3, r2, 8192
        mtspr 256, r3
        stfs f1, -16(r1)
        addi r3, r1, -16
        addi r4, r1, -32
        lvx v2, 0, r3
        stvx v2, 0, r4
        lwz r3, -32(r1)
        mtspr 256, r2
        blr

and:

_test:
        stfs f1, -4(r1)
        nop
        nop
        nop
        lwz r3, -4(r1)
        blr

llvm-svn: 36025
 2007-04-14 23:02:14 +00:00
Chris Lattner b37fb6a0da Implement InstCombine/vec_demanded_elts.ll:test2. This allows us to turn 
unsigned test(float f) {
 return _mm_cvtsi128_si32( (__m128i) _mm_set_ss( f*f ));
}

into:

_test:
        movss 4(%esp), %xmm0
        mulss %xmm0, %xmm0
        movd %xmm0, %eax
        ret

instead of:

_test:
        movss 4(%esp), %xmm0
        mulss %xmm0, %xmm0
        xorps %xmm1, %xmm1
        movss %xmm0, %xmm1
        movd %xmm1, %eax
        ret

GCC gets:

_test:
        subl    $28, %esp
        movss   32(%esp), %xmm0
        mulss   %xmm0, %xmm0
        xorps   %xmm1, %xmm1
        movss   %xmm0, %xmm1
        movaps  %xmm1, %xmm0
        movd    %xmm0, 12(%esp)
        movl    12(%esp), %eax
        addl    $28, %esp
        ret

llvm-svn: 36020
 2007-04-14 22:29:23 +00:00
Chris Lattner efb33d28c6 Implement PR1201 and test/Transforms/InstCombine/malloc-free-delete.ll 
llvm-svn: 35981
 2007-04-14 00:20:02 +00:00
Chris Lattner 74ff60ff84 Turn stuff like: 
icmp slt i32 %X, 0              ; <i1>:0 [#uses=1]
        sext i1 %0 to i32               ; <i32>:1 [#uses=1]

into:

        %X.lobit = ashr i32 %X, 31              ; <i32> [#uses=1]

This implements InstCombine/icmp.ll:test[34]

llvm-svn: 35891
 2007-04-11 06:57:46 +00:00
Chris Lattner d0f7942e23 Simplify some comparisons to arithmetic, this implements: 
Transforms/InstCombine/icmp.ll

llvm-svn: 35890
 2007-04-11 06:53:04 +00:00
Chris Lattner 20f2372a7c canonicalize (x <u 2147483648) -> (x >s -1) and (x >u 2147483647) -> (x <s 0) 
llvm-svn: 35886
 2007-04-11 06:12:58 +00:00
Chris Lattner 7ddbff090a fix a miscompilation of: 
define i32 @test(i32 %X) {
entry:
        %Y = and i32 %X, 4              ; <i32> [#uses=1]
        icmp eq i32 %Y, 0               ; <i1>:0 [#uses=1]
        sext i1 %0 to i32               ; <i32>:1 [#uses=1]
        ret i32 %1
}

by moving code out of commonIntCastTransforms into visitZExt.  Simplify the
APInt gymnastics in it etc.

llvm-svn: 35885
 2007-04-11 05:45:39 +00:00
Chris Lattner 467b69cabb Strengthen the boundary conditions of this fold, implementing 
InstCombine/set.ll:test25

llvm-svn: 35852
 2007-04-09 23:52:13 +00:00
Chris Lattner a87c9f6114 Fix PR1304 and Transforms/InstCombine/2007-04-08-SingleEltVectorCrash.ll 
llvm-svn: 35792
 2007-04-09 01:37:55 +00:00
Chris Lattner 4ca9cbb170 Eliminate useless insertelement instructions. This implements 
Transforms/InstCombine/vec_insertelt.ll and fixes PR1286.

We now compile the code from that bug into:

_foo:
        movl 4(%esp), %eax
        movdqa (%eax), %xmm0
        movl 8(%esp), %ecx
        psllw (%ecx), %xmm0
        movdqa %xmm0, (%eax)
        ret

instead of:

_foo:
        subl $4, %esp
        movl %ebp, (%esp)
        movl %esp, %ebp
        movl 12(%ebp), %eax
        movdqa (%eax), %xmm0
        #IMPLICIT_DEF %eax
        pinsrw $2, %eax, %xmm0
        xorl %ecx, %ecx
        pinsrw $3, %ecx, %xmm0
        pinsrw $4, %eax, %xmm0
        pinsrw $5, %ecx, %xmm0
        pinsrw $6, %eax, %xmm0
        pinsrw $7, %ecx, %xmm0
        movl 8(%ebp), %eax
        movdqa (%eax), %xmm1
        psllw %xmm0, %xmm1
        movdqa %xmm1, (%eax)
        movl %ebp, %esp
        popl %ebp
        ret

woo :)

llvm-svn: 35788
 2007-04-09 01:11:16 +00:00
Chris Lattner c8d3788f71 reenable this xform, whoops :) 
llvm-svn: 35765
 2007-04-08 08:01:49 +00:00
Chris Lattner 7621a031d8 Fix regression on Instcombine/apint-or2.ll 
llvm-svn: 35763
 2007-04-08 07:55:22 +00:00
Chris Lattner 1150df9cc4 Generalize the code that handles (A&B)|(A&C) to work where B/C are not constants. 
Add a new xform to simplify (A&B)|(~A&C).  THis implements InstCombine/or2.ll:test1

llvm-svn: 35760
 2007-04-08 07:47:01 +00:00
Chris Lattner 3dbe65f80a implement Transforms/InstCombine/malloc2.ll and PR1313 
llvm-svn: 35700
 2007-04-06 18:57:34 +00:00
Dale Johannesen 7c2001d014 Prevent transformConstExprCastCall from generating conversions that assert 
elsewhere.

llvm-svn: 35668
 2007-04-04 19:16:42 +00:00
Jeff Cohen 5a1c750f31 Fix 2007-04-04-BadFoldBitcastIntoMalloc.ll 
llvm-svn: 35665
 2007-04-04 16:58:57 +00:00
Duncan Sands f01a47c93c Fix comment. 
llvm-svn: 35655
 2007-04-04 06:42:45 +00:00
Chris Lattner e5bbb3cb1a Fix a bug I introduced with my patch yesterday which broke Qt (I converted 
some constant exprs to apints).

Thanks to Anton for tracking down a small testcase that triggered this!

llvm-svn: 35633
 2007-04-03 23:29:39 +00:00
Chris Lattner a74deafb13 reinstate the previous two patches, with a bugfix :) 
ldecod now passes.

llvm-svn: 35626
 2007-04-03 17:43:25 +00:00
Evan Cheng 7511fa280d Reverting back to 1.723. The last two commits broke JM (and possibily others) on ARM. 
llvm-svn: 35620
 2007-04-03 08:11:50 +00:00
Chris Lattner 64c764cebc Split a whole ton of code out of visitICmpInst into visitICmpInstWithInstAndIntCst. 
llvm-svn: 35614
 2007-04-03 04:46:52 +00:00
Chris Lattner 8b2ec5f506 Fix PR1253 and xor2.ll:test[01] 
llvm-svn: 35612
 2007-04-03 01:47:41 +00:00
Zhou Sheng 9bc8ab100d 1. Make use of APInt operation instead of using ConstantExpr::getXXX. 
2. Use cheaper APInt methods.

llvm-svn: 35594
 2007-04-02 13:45:30 +00:00
Zhou Sheng 56cda95658 Use uint32_t for bitwidth instead of unsigned. 
llvm-svn: 35593
 2007-04-02 08:20:41 +00:00
Chris Lattner 9d5aacee92 Wrap long line 
llvm-svn: 35588
 2007-04-02 05:48:58 +00:00
Chris Lattner 50490d54f2 use more obvious function name. 
llvm-svn: 35587
 2007-04-02 05:42:22 +00:00
Chris Lattner b24acc7bee simplify (x+c)^signbit as (x+c+signbit), pointed out by PR1288. This implements 
test/Transforms/InstCombine/xor.ll:test28

llvm-svn: 35584
 2007-04-02 05:36:22 +00:00
Chris Lattner c3eeb42809 simplify this code, make it work for ap ints 
llvm-svn: 35561
 2007-04-01 20:57:36 +00:00
Zhou Sheng 150f3bbab2 Avoid unnecessary APInt construction. 
llvm-svn: 35555
 2007-04-01 17:13:37 +00:00
Reid Spencer 6bba6c8143 For PR1297: 
Support overloaded intrinsics bswap, ctpop, cttz, ctlz.

llvm-svn: 35547
 2007-04-01 07:35:23 +00:00
Chris Lattner 0427799531 Fix InstCombine/2007-03-31-InfiniteLoop.ll 
llvm-svn: 35536
 2007-04-01 05:36:37 +00:00
Zhou Sheng 82c42284f4 Delete dead code. 
llvm-svn: 35525
 2007-03-31 02:50:26 +00:00
Zhou Sheng 4f16402e0d Use APInt operators to calculate the carry bits, remove this loop. 
llvm-svn: 35524
 2007-03-31 02:38:39 +00:00
Zhou Sheng fd28a33031 Make sure the use of ConstantInt::getZExtValue() for shift amount safe. 
llvm-svn: 35510
 2007-03-30 17:20:39 +00:00
Zhou Sheng b25806fa5f 1. Make sure the use of ConstantInt::getZExtValue() for getting shift 
amount is safe.
2. Use new method on ConstantInt instead of (? :) operator.
3. Use new method uge() on ConstantInt to simplify codes.

llvm-svn: 35505
 2007-03-30 09:29:48 +00:00
Zhou Sheng 5e60a4a6b0 Use APInt operation instead of ConstantExpr::getXX. 
llvm-svn: 35503
 2007-03-30 05:45:18 +00:00
Zhou Sheng b3a80b1d70 1. Make more use of APInt::getHighBitsSet/getLowBitsSet. 
2. Let APInt variable do the binary operation stuff instead of using
   ConstantExpr::getXXX.

llvm-svn: 35450
 2007-03-29 08:15:12 +00:00
Zhou Sheng 444af49cc0 Clean up some codes in InstCombiner::SimplifyDemandedBits(). 
llvm-svn: 35446
 2007-03-29 04:45:55 +00:00
Zhou Sheng a4475575c0 Clean up codes in InstCombiner::SimplifyDemandedBits(): 
1. Line out nested call of APInt::zext/trunc.
2. Make more use of APInt::getHighBitsSet/getLowBitsSet.
3. Use APInt[] operator instead of expression like "APIntVal & SignBit".

llvm-svn: 35444
 2007-03-29 02:26:30 +00:00
Zhou Sheng 4961cf1c06 1. Make the APInt variable do the binary operation stuff if possible 
instead of using ConstantExpr::getXX.
2. Use constant reference to APInt if possible instead of expensive
   APInt copy.

llvm-svn: 35443
 2007-03-29 01:57:21 +00:00
Zhou Sheng 117477e28b Avoid unnecessary APInt construction. 
llvm-svn: 35431
 2007-03-28 17:38:21 +00:00
Zhou Sheng 23f7a1c947 1. Make more use of getLowBitsSet/getHighBitsSet. 
2. Use APInt[] instead of "X & SignBit".
3. Clean up some codes.
4. Make the expression like "ShiftAmt = ShiftAmtC->getZExtValue()" safe.

llvm-svn: 35424
 2007-03-28 15:02:20 +00:00
Zhou Sheng 2777a31850 1. Make more use of getLowBitsSet/getHighBitsSet. 
2. Make the APInt value do the zext/trunc stuff instead of using
   ConstantExpr::getZExt().

llvm-svn: 35422
 2007-03-28 09:19:01 +00:00
Zhou Sheng c2d3309b99 Use UnknownBIts[BitWidth-1] instead of UnknownBIts & SignBits. 
llvm-svn: 35418
 2007-03-28 05:15:57 +00:00
Zhou Sheng 18570b1f14 Remove unused APInt variable. 
llvm-svn: 35414
 2007-03-28 03:02:21 +00:00
Zhou Sheng 57e3f7324b Clean up codes in ComputeMaskedBits(): 
1. Line out nested use of zext/trunc.
2. Make more use of getHighBitsSet/getLowBitsSet.
3. Use APInt[] != 0 instead of "(APInt & SignBit) != 0".

llvm-svn: 35408
 2007-03-28 02:19:03 +00:00
Reid Spencer a5c18bf798 For PR1280: 
When converting an add/xor/and triplet into a trunc/sext, only do so if the
intermediate integer type is a bitwidth that the targets can handle.

llvm-svn: 35400
 2007-03-28 01:36:16 +00:00
Evan Cheng a4ed8a512a Unbreaks non-debug builds. 
llvm-svn: 35383
 2007-03-27 16:44:48 +00:00
Reid Spencer 54d5b1b8f8 Implement some minor review feedback. 
llvm-svn: 35373
 2007-03-26 23:58:26 +00:00
Reid Spencer 441486c172 For PR1271: 
Fix another incorrectly converted shift mask.

llvm-svn: 35371
 2007-03-26 23:45:51 +00:00
Chris Lattner d2602d5054 eliminate use of std::set 
llvm-svn: 35361
 2007-03-26 20:40:50 +00:00
Reid Spencer 755d0e7ffc Get better debug output by having modified instructions print both the 
original and new instruction. A slight performance hit with ostringstream
but it is only for debug.
Also, clean up an uninitialized variable warning noticed in a release build.

llvm-svn: 35358
 2007-03-26 17:44:01 +00:00
Reid Spencer 769a5a8e0b Get the number of bits to set in a mask correct for a shl/lshr transform. 
llvm-svn: 35357
 2007-03-26 17:18:58 +00:00
Reid Spencer 50898607a9 For PR1271: 
Fix SingleSource/Regression/C/2003-05-21-UnionBitFields.c by changing a
getHighBitsSet call to getLowBitsSet call that was incorrectly converted
from the original lshr constant expression.

llvm-svn: 35348
 2007-03-26 05:25:00 +00:00
Reid Spencer 52830327e9 For PR1271: 
Remove a use of getLowBitsSet that caused the mask used for replacement of
shl/lshr pairs with an AND instruction to be computed incorrectly. Its not
clear exactly why this is the case. This solves the disappearing shifts
problem, but it doesn't fix Regression/C/2003-05-21-UnionBitFields. It
seems there is more going on.

llvm-svn: 35342
 2007-03-25 21:11:44 +00:00
Chris Lattner 9bf53ffaa2 implement Transforms/InstCombine/cast2.ll:test3 and PR1263 
llvm-svn: 35341
 2007-03-25 20:43:09 +00:00
Reid Spencer 624766f8a2 Some cleanup from review: 
* Don't assume shift amounts are <= 64 bits
* Avoid creating an extra APInt in SubOne and AddOne by using -- and ++
* Add another use of getLowBitsSet
* Convert a series of if statements to a switch

llvm-svn: 35339
 2007-03-25 19:55:33 +00:00
Reid Spencer 80263aadf3 Refactor several ConstantExpr::getXXX calls with ConstantInt arguments 
using the facilities of APInt. While this duplicates a tiny fraction of
the constant folding code, it also makes the code easier to read and
avoids large ConstantExpr overhead for simple, known computations.

llvm-svn: 35335
 2007-03-25 05:33:51 +00:00
Zhou Sheng 222d5ebfd2 1. Avoid unnecessary APInt construction if possible. 
2. Use isStrictlyPositive() instead of isPositive() in two places where
   they need APInt value > 0 not only >=0.

llvm-svn: 35333
 2007-03-25 05:01:29 +00:00
Reid Spencer cd99fbdf3b Make more uses of getHighBitsSet and get rid of some pointless & of an 
APInt with its type mask.

llvm-svn: 35325
 2007-03-25 04:26:16 +00:00
Reid Spencer d8aad61d4d More APIntification: 
* Convert the last use of a uint64_t that should have been an APInt.
* Change ComputeMaskedBits to have a const reference argument for the Mask
  so that recursions don't cause unneeded temporaries. This causes temps
  to be needed in other places (where the mask has to change) but this
  change optimizes for the recursion which is more frequent.
* Remove two instances of &ing a Mask with getAllOnesValue. Its not
  needed any more because APInt is accurate in its bit computations.
* Start using the getLowBitsSet and getHighBits set methods on APInt
  instead of shifting. This makes it more clear in the code what is
  going on.

llvm-svn: 35321
 2007-03-25 02:03:12 +00:00
Chris Lattner 3a8248f79d fix a regression on vector or instructions. 
llvm-svn: 35314
 2007-03-24 23:56:43 +00:00
Zhou Sheng e9ebd3f6ba Make some codes more efficient. 
llvm-svn: 35297
 2007-03-24 15:34:37 +00:00
Reid Spencer a962d18774 For PR1205: 
Convert some calls to ConstantInt::getZExtValue() into getValue() and
use APInt facilities in the subsequent computations.

llvm-svn: 35294
 2007-03-24 00:42:08 +00:00
Reid Spencer 959a21d3dc For PR1205: 
* APIntify visitAdd and visitSelectInst
* Remove unused uint64_t versions of utility functions that have been
  replaced with APInt versions.
This completes most of the changes for APIntification of InstCombine. This
passes llvm-test and llvm/test/Transforms/InstCombine/APInt.

Patch by Zhou Sheng.

llvm-svn: 35287
 2007-03-23 21:24:59 +00:00
Reid Spencer 6d39206bc2 For PR1205: 
APIntify visitDiv, visitMul and visitRem.

Patch by Zhou Sheng.

llvm-svn: 35283
 2007-03-23 20:05:17 +00:00
Chris Lattner 12b89cc148 switch AddReachableCodeToWorklist from being recursive to being iterative. 
llvm-svn: 35282
 2007-03-23 19:17:18 +00:00
Reid Spencer 6274c72ee1 For PR1205: 
APIntify several utility functions supporting logical operators and shift
operators.

Patch by Zhou Sheng.

llvm-svn: 35281
 2007-03-23 18:46:34 +00:00