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212 Commits

Author SHA1 Message Date
Duncan Sands
09750273a4 Allow the inverse transform x86_fp80 -> i80 (also 
fires during the Ada build).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63731 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-04 11:17:06 +00:00
Duncan Sands
a06aef6ec5 Fix PR3468: a crash when constant folding a bitcast of 
i80 to x86 long double (this was presumably generated
by sroa).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63730 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-02-04 10:17:14 +00:00
Dale Johannesen
ed6af24e14 Make special cases (0 inf nan) work for frem. 
Besides APFloat, this involved removing code
from two places that thought they knew the
result of frem(0., x) but were wrong.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62645 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-21 00:35:19 +00:00
Chris Lattner
c9a005807a div/rem by zero and div/rem overflow are both undefined according to 
langref.  Constant fold them to undef instead of trying to preserve
the trap.  This fixes PR3354.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62534 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-01-19 21:55:26 +00:00
Mon P Wang
aeb06d2462 Added support for the following definition of shufflevector 
<result> = shufflevector <n x <ty>> <v1>, <n x <ty>> <v2>, <m x i32> <mask> 



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58964 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-10 04:46:22 +00:00
Devang Patel
b6dc9352b0 Fix unused variable warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58653 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-11-03 23:20:04 +00:00
Chris Lattner
868510328f apply Eli's patch for PR2165 and provide a testcase. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57625 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-10-16 05:26:51 +00:00
Dale Johannesen
23a98551ab Add a "loses information" return value to APFloat::convert 
and APFloat::convertToInteger.  Restore return value to
IEEE754.  Adjust all users accordingly.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57329 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-10-09 23:00:39 +00:00
Dale Johannesen
7111b02c73 Rename APFloat::convertToAPInt to bitcastToAPInt to 
make it clearer what the function does.  No functional
change.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57325 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-10-09 18:53:47 +00:00
Nick Lewycky
8373d38afd Try to fold each element of a vector. This is needed to maintain structural 
equivalence.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55694 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 06:48:55 +00:00
Nick Lewycky
83c05e5d30 Don't crash when trying to constant fold a vector with some elements that can't 
be folded. Instead, fail to fold the entire vector.

We could also return a vector with some elements folded and some not. If anyone
thinks that's a better approach, please speak up!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55689 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-09-03 05:54:33 +00:00
Chris Lattner
fea85c46c0 Fix a case where vector comparison constant folding would cause an 
infinite recursion.  part of PR2529


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53383 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-10 00:29:28 +00:00
Chris Lattner
330e7e4d25 elementwise comparison of vector constants was completely wrong. Fix 
it for PR2529


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53380 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-10 00:08:17 +00:00
Chris Lattner
8013954f15 improve comment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53243 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-08 18:47:38 +00:00
Chris Lattner
155a490258 Fix three bugs: 
1) evaluate [v]fcmp true/false with undefs to true or false instead
   of undef.
2) fix vector comparisons with undef to return a vector result instead 
   of i1
3) fix vector comparisons with evaluatable results to return vector
   true/false instead of i1 true/false (PR2529)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53220 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-07-08 05:46:34 +00:00
Dan Gohman
6e68f59b78 Constant folding for insertvalue and extractvalue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51889 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-06-03 00:15:20 +00:00
Nick Lewycky
08de1e476c Revert constant-folding change that will miscompile in some cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51223 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-17 19:00:05 +00:00
Nick Lewycky
6cccce3e58 Unbreak the build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51217 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-17 09:05:22 +00:00
Nick Lewycky
d24ae8703f Constant fold inttoptr and ptrtoint. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51216 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-17 09:03:26 +00:00
Dan Gohman
041e2eb517 IR support for extractvalue and insertvalue instructions. Also, begin 
moving toward making structs and arrays first-class types.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51157 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-15 19:50:34 +00:00
Gabor Greif
efe65369a7 merge of use-diet branch to trunk 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50943 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-05-10 08:32:32 +00:00
Chris Lattner
3e5d1d8d08 hopefully resolve PR2240 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49999 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 19:59:12 +00:00
Chris Lattner
0e4b6c7551 rearrange some code, simplify handling of shifts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49995 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 18:24:14 +00:00
Chris Lattner
eb9c8e1e3f Use simplified ConstantFP::get method, fix a bug handling frem x, 0 with long doubles. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49976 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-20 00:26:06 +00:00
Chris Lattner
d881ad2c57 Implement PR2206. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49967 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 22:17:26 +00:00
Chris Lattner
1c14c29746 refactor handling of symbolic constant folding, picking up 
a few new cases( see Integer/a1.ll), but not anything that
would happen in practice.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49965 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 21:58:19 +00:00
Chris Lattner
61783d7322 indentation fix. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49964 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-04-19 21:13:00 +00:00
Nate Begeman
83ad90a779 Don't eliminate bitcast instructions that change the type of a pointer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48971 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-31 00:22:16 +00:00
Evan Cheng
26471c48b3 Handle a special case xor undef, undef -> 0. Technically this should be transformed to undef. But this is such a common idiom (misuse) we are going to handle it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48792 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-25 20:08:07 +00:00
Dan Gohman
37a9ca5bc5 Use the new convertFromAPInt instead of convertFromZeroExtendedInteger. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47744 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-02-29 01:42:52 +00:00
Anton Korobeynikov
ae9f3a3b7c Unbreak build with gcc 4.3: provide missed includes and silence most annoying warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47367 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-02-20 11:08:44 +00:00
Chris Lattner
46acf85b97 Fix some minor issues folding undef, PR2052 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47314 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-02-19 06:22:12 +00:00
Chris Lattner
4ee451de36 Remove attribution from file headers, per discussion on llvmdev. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45418 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-29 20:36:04 +00:00
Christopher Lamb
43ad6b3e0d Change the PointerType api for creating pointer types. The old functionality of PointerType::get() has become PointerType::getUnqual(), which returns a pointer in the generic address space. The new prototype of PointerType::get() requires both a type and an address space. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45082 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-17 01:12:55 +00:00
Chris Lattner
7431c2ba79 Teach VMCore to constant fold shufflevectors with constant operands. 
This allows us to compile:

#include <emmintrin.h>
typedef __m128i VSInt16;
typedef short vSInt16 __attribute__ ((__vector_size__ (16)));
VSInt16 t3() {
  return (VSInt16)((vSInt16)_mm_set1_epi16(6518));
}

into:

_t3:
	movaps	LCPI1_0, %xmm0
	ret

instead of:
_t3:
	movl	$6518, %eax
	movd	%eax, %xmm0
	pextrw	$0, %xmm0, %eax
	xorps	%xmm0, %xmm0
	pinsrw	$0, %eax, %xmm0
	punpcklwd	%xmm0, %xmm0
	pshufd	$0, %xmm0, %xmm0
	ret



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44856 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-11 07:49:37 +00:00
Chris Lattner
9eaa835e88 significantly simplify some code, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44850 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-11 06:07:39 +00:00
Chris Lattner
2b0f806c88 refactor some code, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44849 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-11 05:55:02 +00:00
Chris Lattner
f286f6fd93 Fix PR1850 by removing an unsafe transformation from VMCore/ConstantFold.cpp. 
Reimplement the xform in Analysis/ConstantFolding.cpp where we can use
targetdata to validate that it is safe.  While I'm in there, fix some const
correctness issues and generalize the interface to the "operand folder".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44817 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-12-10 22:53:04 +00:00
Nate Begeman
b348d18caf Add support for vectors to int <-> float casts. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44204 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-11-17 03:58:34 +00:00
Dan Gohman
2cda9399de Fix a regression in test/CodeGen/X86/2007-04-24-VectorCrash.ll introduced 
by r43510. Gracefully handle constants with vector type that aren't
ConstantVector or ConstantAggregateZero.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43579 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-10-31 21:36:31 +00:00
Dan Gohman
d61de35564 Add support for folding binary operators with vector zero operands. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43510 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-10-30 19:00:49 +00:00
Dale Johannesen
db44bf85d8 Disable attempts to constant fold PPC f128. 
Remove the assumption that this will happen from
various places.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43053 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-10-16 23:38:29 +00:00
Chris Lattner
3cab1c72b5 avoid an APFloat copy. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42979 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-10-15 05:34:10 +00:00
Dale Johannesen
5927d8e94d Disable some compile-time optimizations on PPC 
long double.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42958 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-10-14 01:56:47 +00:00
Neil Booth
ccf596a53e convertFromInteger, as originally written, expected sign-extended 
input.  APInt unfortunately zero-extends signed integers, so Dale
modified the function to expect zero-extended input.  Make this
assumption explicit in the function name.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42732 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-10-07 11:45:55 +00:00
Dale Johannesen
88216af3ea Constant fold int-to-long-double conversions; 
use APFloat for int-to-float/double; use
round-to-nearest for these (implementation-defined,
seems to match gcc).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42484 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-09-30 18:19:03 +00:00
Dale Johannesen
350add8f51 Remove no-longer-used variable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42329 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-09-25 23:32:20 +00:00
Dale Johannesen
0edc47ad7b Make APFloat->int conversions deterministic even in 
cases with undefined behavior.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42328 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-09-25 23:07:07 +00:00
Dale Johannesen
6b92942c9c float->int conversion rounds toward 0. Duh. 
Fixes PR1698.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42273 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-09-24 21:06:09 +00:00
Dale Johannesen
79653fcdc2 Just use APFloat for const / const. Fixes 
-1. / -0.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42254 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-09-24 00:32:45 +00:00