[committed] Accept "const_int 0" operand 1 in PA "scc" insns

[John David Anglin <dave dot anglin at bell dot net>]

This pattern fixes the following ICE found compiling ArabicShaping.cpp:

g++-4.7 -D_REENTRANT -I. -I./.. -I../common -I./unicode - 
DU_ATTRIBUTE_DEPRECATED= -DU_LAYOUT_IMPLEMENTATION -D__NO_MATH_INLINES  
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DNDEBUG - 
D_FORTIFY_SOURCE=2 -DGCC_HIDDEN_VISIBILITY -B/usr/bin -fexceptions - 
funsigned-char -fno-strict-aliasing -g -pipe -fPIC -pthread -Wall - 
Wcast-align -Wno-trigraphs -Wextra -Wno-missing-field-initializers - 
std=gnu++11 -fvisibility=hidden -fprofile-use -Wcoverage-mismatch - 
fprofile-correction -O2 -W -Wall -pedantic -Wpointer-arith -Wwrite- 
strings -Wno-long-long -std=c++11 -c -DPIC -fPIC -o ArabicShaping.o  
ArabicShaping.cpp
ArabicShaping.cpp: In static member function 'static  
icu_50::ArabicShaping::ShapeType  
icu_50::ArabicShaping::getShapeType(LEUnicode)':
ArabicShaping.cpp:36:94: warning: cast from 'const le_uint8* {aka  
const unsigned char*}' to 'const icu_50::ClassDefinitionTable*'  
increases required alignment of target type [-Wcast-align]
ArabicShaping.cpp: In static member function 'static void  
icu_50::ArabicShaping::shape(const LEUnicode*, le_int32, le_int32,  
le_int32, le_bool, icu_50::LEGlyphStorage&)':
ArabicShaping.cpp:210:1: note: file /net/usr.work/d036493/hppa/ 
CGK_ls3011_v29/i18n/icu/50.1/icu/source/layout/ArabicShaping.gcda not  
found, execution counts estimated
ArabicShaping.cpp:208:1: error: unrecognizable insn:
(insn 272 271 273 33 (set (reg:SI 298)
       (ne:SI (const_int 0 [0])
           (const_int 0 [0]))) ArabicShaping.cpp:201 -1
    (nil))
ArabicShaping.cpp:208:1: internal compiler error: in extract_insn, at  
recog.c:2123

The expander allowed a "const_int 0" operand 1 but the subsequent  
patterns didn't.  The patch fixes
this inconsistency.

Tested on hppa2.0w-hp-hpux11.11 and hppa64-hp-hpux11.11.  Applied to  
active branches.

Dave
--
John David Anglin	dave.anglin@bell.net

Attachment: pa.md.d.txt
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