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76 Commits

Author SHA1 Message Date
Dan Gohman
4646e714c4 Apply a patch by Micah Villmow to fix AsmParser to accept vector 
shift constant expressions, and add support for folding vector
shift constant expressions. This fixes PR3802.

llvm-svn: 67010
 2009-03-14 17:09:17 +00:00
Daniel Dunbar
d5e0934e30 Extension of GEP in constant folder was broken (apparently this code 
has never been run!).
 - Sorry, don't know how to make an LLVM test case for this.

llvm-svn: 65383
 2009-02-24 19:10:46 +00:00
Duncan Sands
6b95b76bca Allow the inverse transform x86_fp80 -> i80 (also 
fires during the Ada build).

llvm-svn: 63731
 2009-02-04 11:17:06 +00:00
Duncan Sands
528bb91ea8 Fix PR3468: a crash when constant folding a bitcast of 
i80 to x86 long double (this was presumably generated
by sroa).

llvm-svn: 63730
 2009-02-04 10:17:14 +00:00
Dale Johannesen
6854f86296 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.

llvm-svn: 62645
 2009-01-21 00:35:19 +00:00
Chris Lattner
8c8234435a 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.

llvm-svn: 62534
 2009-01-19 21:55:26 +00:00
Mon P Wang
911ee5bf8b Added support for the following definition of shufflevector 
<result> = shufflevector <n x <ty>> <v1>, <n x <ty>> <v2>, <m x i32> <mask> 

llvm-svn: 58964
 2008-11-10 04:46:22 +00:00
Devang Patel
09aea7e93e Fix unused variable warnings. 
llvm-svn: 58653
 2008-11-03 23:20:04 +00:00
Chris Lattner
3048ccc1f9 apply Eli's patch for PR2165 and provide a testcase. 
llvm-svn: 57625
 2008-10-16 05:26:51 +00:00
Dale Johannesen
075a62519f Add a "loses information" return value to APFloat::convert 
and APFloat::convertToInteger.  Restore return value to
IEEE754.  Adjust all users accordingly.

llvm-svn: 57329
 2008-10-09 23:00:39 +00:00
Dale Johannesen
9e57068854 Rename APFloat::convertToAPInt to bitcastToAPInt to 
make it clearer what the function does.  No functional
change.

llvm-svn: 57325
 2008-10-09 18:53:47 +00:00
Nick Lewycky
8b8886c6b0 Try to fold each element of a vector. This is needed to maintain structural 
equivalence.

llvm-svn: 55694
 2008-09-03 06:48:55 +00:00
Nick Lewycky
57cebeaeba 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!

llvm-svn: 55689
 2008-09-03 05:54:33 +00:00
Chris Lattner
563d2c9fac Fix a case where vector comparison constant folding would cause an 
infinite recursion.  part of PR2529

llvm-svn: 53383
 2008-07-10 00:29:28 +00:00
Chris Lattner
4fbada0bef elementwise comparison of vector constants was completely wrong. Fix 
it for PR2529

llvm-svn: 53380
 2008-07-10 00:08:17 +00:00
Chris Lattner
6163b7a5ad improve comment 
llvm-svn: 53243
 2008-07-08 18:47:38 +00:00
Chris Lattner
d4bcc9011b 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)

llvm-svn: 53220
 2008-07-08 05:46:34 +00:00
Dan Gohman
fbf0f6cf8e Constant folding for insertvalue and extractvalue. 
llvm-svn: 51889
 2008-06-03 00:15:20 +00:00
Nick Lewycky
46e3a168c0 Revert constant-folding change that will miscompile in some cases. 
llvm-svn: 51223
 2008-05-17 19:00:05 +00:00
Nick Lewycky
baa90d4eef Unbreak the build. 
llvm-svn: 51217
 2008-05-17 09:05:22 +00:00
Nick Lewycky
1df40102a9 Constant fold inttoptr and ptrtoint. 
llvm-svn: 51216
 2008-05-17 09:03:26 +00:00
Dan Gohman
821bf58428 IR support for extractvalue and insertvalue instructions. Also, begin 
moving toward making structs and arrays first-class types.

llvm-svn: 51157
 2008-05-15 19:50:34 +00:00
Gabor Greif
49bf1a4cf6 merge of use-diet branch to trunk 
llvm-svn: 50943
 2008-05-10 08:32:32 +00:00
Chris Lattner
75df16a5b0 hopefully resolve PR2240 
llvm-svn: 49999
 2008-04-20 19:59:12 +00:00
Chris Lattner
2bed045e5e rearrange some code, simplify handling of shifts. 
llvm-svn: 49995
 2008-04-20 18:24:14 +00:00
Chris Lattner
0cda383725 Use simplified ConstantFP::get method, fix a bug handling frem x, 0 with long doubles. 
llvm-svn: 49976
 2008-04-20 00:26:06 +00:00
Chris Lattner
8cde1e71f0 Implement PR2206. 
llvm-svn: 49967
 2008-04-19 22:17:26 +00:00
Chris Lattner
1303e72c66 refactor handling of symbolic constant folding, picking up 
a few new cases( see Integer/a1.ll), but not anything that
would happen in practice.

llvm-svn: 49965
 2008-04-19 21:58:19 +00:00
Chris Lattner
57bd4076b5 indentation fix. 
llvm-svn: 49964
 2008-04-19 21:13:00 +00:00
Nate Begeman
610aa2511c Don't eliminate bitcast instructions that change the type of a pointer 
llvm-svn: 48971
 2008-03-31 00:22:16 +00:00
Evan Cheng
8cb64d8e8b 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. 
llvm-svn: 48792
 2008-03-25 20:08:07 +00:00
Dan Gohman
3491cd8454 Use the new convertFromAPInt instead of convertFromZeroExtendedInteger. 
llvm-svn: 47744
 2008-02-29 01:42:52 +00:00
Anton Korobeynikov
0c5e186924 Unbreak build with gcc 4.3: provide missed includes and silence most annoying warnings. 
llvm-svn: 47367
 2008-02-20 11:08:44 +00:00
Chris Lattner
85482657eb Fix some minor issues folding undef, PR2052 
llvm-svn: 47314
 2008-02-19 06:22:12 +00:00
Chris Lattner
ad9a6ccb83 Remove attribution from file headers, per discussion on llvmdev. 
llvm-svn: 45418
 2007-12-29 20:36:04 +00:00
Christopher Lamb
a608afb52e 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. 
llvm-svn: 45082
 2007-12-17 01:12:55 +00:00
Chris Lattner
a8b1b4b5d2 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

llvm-svn: 44856
 2007-12-11 07:49:37 +00:00
Chris Lattner
b265924121 significantly simplify some code, no functionality change. 
llvm-svn: 44850
 2007-12-11 06:07:39 +00:00
Chris Lattner
3822e8ee5a refactor some code, no functionality change. 
llvm-svn: 44849
 2007-12-11 05:55:02 +00:00
Chris Lattner
5ca42cd342 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".

llvm-svn: 44817
 2007-12-10 22:53:04 +00:00
Nate Begeman
2a8ef3f29a Add support for vectors to int <-> float casts. 
llvm-svn: 44204
 2007-11-17 03:58:34 +00:00
Dan Gohman
a9d080508e 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.

llvm-svn: 43579
 2007-10-31 21:36:31 +00:00
Dan Gohman
9365affecc Add support for folding binary operators with vector zero operands. 
llvm-svn: 43510
 2007-10-30 19:00:49 +00:00
Dale Johannesen
fdb488d4b5 Disable attempts to constant fold PPC f128. 
Remove the assumption that this will happen from
various places.

llvm-svn: 43053
 2007-10-16 23:38:29 +00:00
Chris Lattner
bf2f5b472f avoid an APFloat copy. 
llvm-svn: 42979
 2007-10-15 05:34:10 +00:00
Dale Johannesen
4cbce377c6 Disable some compile-time optimizations on PPC 
long double.

llvm-svn: 42958
 2007-10-14 01:56:47 +00:00
Neil Booth
6e01c5df37 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.

llvm-svn: 42732
 2007-10-07 11:45:55 +00:00
Dale Johannesen
2a0b2ab2fc 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).

llvm-svn: 42484
 2007-09-30 18:19:03 +00:00
Dale Johannesen
53f2e47789 Remove no-longer-used variable. 
llvm-svn: 42329
 2007-09-25 23:32:20 +00:00
Dale Johannesen
bc41438bab Make APFloat->int conversions deterministic even in 
cases with undefined behavior.

llvm-svn: 42328
 2007-09-25 23:07:07 +00:00