Joseph Myers [Wed, 1 Dec 2010 13:58:52 +0000 (13:58 +0000)]
common.opt (flag_stack_check): New Variable entry.
* common.opt (flag_stack_check): New Variable entry.
(fcompare-debug-second): Use Var.
* flags.h (flag_compare_debug, flag_stack_check): Remove.
* opts.c (flag_compare_debug): Remove.
(common_handle_option): Don't handle OPT_fcompare_debug_second.
Set opts->x_flag_stack_check for OPT_fstack_check_.
* toplev.c (flag_stack_check): Remove.
ada:
* gcc-interface/misc.c (flag_compare_debug, flag_stack_check):
Undefine as macros then define as variables.
(gnat_post_options): Set variables from global_options.
In gcc/objc/:
2010-11-30 Nicola Pero <nicola.pero@meta-innovation.com>
* objc-act.c (objc_build_volatilized_type): Removed.
(objc_non_volatilized_type): Removed.
(objc_type_quals_match): Removed.
(local_variables_to_volatilize): New.
(objc_volatilize_decl): Add the decl to volatilize to
local_variables_to_volatilize, but don't volatilize it yet.
(objc_finish_function): New.
* objc-act.h (local_variables_to_volatilize): New.
In gcc/cp/:
2010-11-30 Nicola Pero <nicola.pero@meta-innovation.com>
* decl.c (finish_function): Call objc_finish_function when
compiling Objective-C++.
* call.c (standard_conversion): Do not call
objc_non_volatilized_type().
(implicit_conversion): Same change.
* typeck.c (comp_ptr_ttypes_real): Same change.
In gcc/:
2010-11-30 Nicola Pero <nicola.pero@meta-innovation.com>
* c-decl.c (finish_function): Call objc_finish_function in
Objective-C.
* c-typeck.c (convert_for_assignment): Do not call
objc_type_quals_match().
Richard Guenther [Tue, 30 Nov 2010 16:55:35 +0000 (16:55 +0000)]
re PR tree-optimization/46722 (Missed fma for x*x + y)
2010-11-30 Richard Guenther <rguenther@suse.de>
PR tree-optimization/46722
* tree-ssa-math-opts.c (convert_mult_to_fma): Get multiplication
operands as arguments.
(execute_optimize_widening_mul): Also handle power of two as
multiplication.
Richard Guenther [Tue, 30 Nov 2010 14:33:00 +0000 (14:33 +0000)]
re PR middle-end/46717 (Compiler segfault in profile-use mode)
2010-11-30 Richard Guenther <rguenther@suse.de>
PR tree-optimization/46717
* value-prof.c (gimple_ic): Preserve EH edges of the indirect
call. Manually create EH edges for the direct call and update
target PHI nodes.
Nicola Pero [Mon, 29 Nov 2010 20:45:49 +0000 (20:45 +0000)]
In gcc/objc/: 2010-11-29 Nicola Pero <nicola.pero@meta-innovation.com>
In gcc/objc/:
2010-11-29 Nicola Pero <nicola.pero@meta-innovation.com>
* objc-act.c (start_class): When a class is reimplemented,
generate an error and avoid adding the class to the list of
implemented classes again, but do not return error_mark_node.
In gcc/testsuite/:
2010-11-29 Nicola Pero <nicola.pero@meta-innovation.com>
Kai Tietz [Mon, 29 Nov 2010 17:52:24 +0000 (17:52 +0000)]
configure: Regenerated.
2010-11-29 Kai Tietz <kai.tietz@onevision.com>
* configure: Regenerated.
* Makefile.in: Regenerated.
* configure.ac (ACX_NONCANONICAL_TARGET): Call it.
(target_alias): Use AC_SUBST for it.
(GCC_NO_EXECUTABLES): Call it.
(AC_PROG_CC): Improve multilib handling.
Check that gcc is used for compilation.
Use pattern from libssp for symbol versioning checking.
* Makefile.am (LTLDFLAGS): Removed.
(libquadmath_la_LDFLAGS): Add -no-undefined.
(libquadmath_la_LINK): Commented out.
(libquadmath_la_DEPENDENCIES): Add libquadmath_la_LIBADD.
(AM_MAKEFLAGS): Add hack for argument passing by top-level.
(MAKEOVERRIDES): New.
* aclocal.m4: Regenerated.
Iain Sandoe [Mon, 29 Nov 2010 16:52:41 +0000 (16:52 +0000)]
strings-1.m: Move to...
gcc/testsuite:
* gcc/testsuite/objc.dg/strings-1.m: Move to...
* gcc/testsuite/objc.dg/strings/strings-1.m: ... here. Update paths.
* gcc/testsuite/objc.dg/strings-2.m: Move to ...
* gcc/testsuite/objc.dg/strings/strings-2.m ... here, provide a
constructor and class reference for NeXT runtime. Update paths.
* gcc/testsuite/obj-c++.dg/strings-1.m: Move to...
* gcc/testsuite/obj-c++.dg/strings/strings-1.m: ... here. Update paths.
* gcc/testsuite/obj-c++.dg/strings-2.m: Move to ...
* gcc/testsuite/obj-c__.dg/strings/strings-2.m ... here, provide a
constructor and class reference for NeXT runtime. Update paths.
Dodji Seketeli [Mon, 29 Nov 2010 16:29:05 +0000 (16:29 +0000)]
re PR debug/46101 (ICE: in build_abbrev_table, at dwarf2out.c:10333 with -feliminate-dwarf2-dups -g)
Fix PR debug/46101
gcc/
* dwarf2out.c (lookup_type_die_strip_naming_typedef): New
function.
(scope_die_for, gen_type_die_for_member): Replace uses of
lookup_type_die with use of lookup_type_die_strip_naming_typedef.
gcc/testsuite/
* g++.dg/debug/dwarf2/typedef5.C: New test
gcc:
* config/i386/darwin.h (ASM_OUTPUT_COMMON): Remove
(ASM_OUTPUT_LOCAL): Likewise.
* config/darwin-protos.h (darwin_asm_declare_object_name): New.
(darwin_output_aligned_bss): Likewise.
(darwin_asm_output_aligned_decl_local): Likewise.
(darwin_asm_output_aligned_decl_common): Likewise.
(darwin_use_anchors_for_symbol_p): Likewise.
* config/rs6000/darwin.h (ASM_OUTPUT_COMMON): Remove.
(TARGET_ASM_OUTPUT_ANCHOR): Define.
(TARGET_USE_ANCHORS_FOR_SYMBOL_P): Define.
(DARWIN_SECTION_ANCHORS): Set to 1.
* config/darwin.c (emit_aligned_common): New var.
(darwin_init_sections): Check that the Darwin private zero-size section
marker is in range.
(darwin_text_section): Check for zero-sized objects.
(darwin_mergeable_string_section): Likewise.
(darwin_mergeable_constant_section): Likewise.
(machopic_select_section): Adjust to check for zero-sized objects.
Assert that OBJC meta data are non-zero sized.
(darwin_asm_declare_object_name): New.
(darwin_asm_declare_constant_name): Adjust for zero-sized
object sections.
(BYTES_ZFILL): Define.
(darwin_emit_weak_or_comdat): New.
(darwin_emit_local_bss): New.
(darwin_emit_common): New.
(darwin_output_aligned_bss): New.
(darwin_asm_output_aligned_decl_common): New.
(darwin_asm_output_aligned_decl_local): New.
(darwin_file_end): Disable subsections_via_symbols when section
anchoring is active.
(darwin_asm_output_anchor): Re-enable.
(darwin_use_anchors_for_symbol_p): New.
(darwin_override_options): Check for versions that can emit
aligned common. Update usage of flags to current.
* config/darwin-sections.def: Update comments and flags for
non-anchor sections. zobj_const_section, zobj_data_section,
zobj_bss_section, zobj_const_data_section: New.
* config/darwin.h (ASM_DECLARE_OBJECT_NAME): Redefine.
(ASM_OUTPUT_ALIGN): Make whitespace output consistent.
(L2_MAX_OFILE_ALIGNMENT): Define.
(ASM_OUTPUT_ALIGNED_BSS): Define.
(ASM_OUTPUT_ALIGNED_DECL_LOCAL): Define.
(ASM_OUTPUT_ALIGNED_DECL_COMMON): Define.
(SECTION_NO_ANCHOR): Define.
(TARGET_ASM_OUTPUT_ANCHOR) Define with a default of NULL.
(DARWIN_SECTION_ANCHORS): Define with a default of 0.
boehm-gc:
* dyn_load.c (GC_register_dynamic_libraries/DARWIN): Add new writable
data section names.
(GC_dyld_name_for_hdr): Adjust layout.
(GC_dyld_image_add): Adjust layout, add new Darwin sections, adjust
debug to name the sections.
(GC_dyld_image_remove): Adjust layout, remove new Darwin sections,
adjust debug to name the sections.
(GC_register_dynamic_libraries): Adjust layout.
(GC_init_dyld): Likewise.
(GC_register_main_static_data): Likewise.
gcc/testsuite:
* gcc.target/powerpc/darwin-abi-12.c: Adjust for new allocators.
* gcc.dg/pr26427.c: Remove redundant warning for powerpc.
* gcc.dg/darwin-comm.c: Adjust for new allocators.
* gcc.dg/darwin-sections.c: New test.
* g++.dg/ext/instantiate2.C: Adjust for new allocators.
Co-Authored-By: Mike Stump <mrs@gcc.gnu.org>
From-SVN: r167242
Joseph Myers [Mon, 29 Nov 2010 14:09:41 +0000 (14:09 +0000)]
system.h: Include "safe-ctype.h" instead of <safe-ctype.h>.
* system.h: Include "safe-ctype.h" instead of <safe-ctype.h>.
Include <signal.h>, <sys/mman.h>, <sys/resource.h> and
<sys/times.h>.
(O_BINARY, SIGCHLD, MAP_FAILED, MAP_ANONYMOUS, kill):
Conditionally define.
(GET_ENVIRONMENT): Poison.
* configure.ac: Don't test for mincore.
* configure: Regenerate.
* config.in: Regenerate.
* collect2-aix.c: Don't include <sys/mman.h>.
* collect2.c: Don't include <signal.h>.
(SIGCHLD): Don't define.
(prefix_from_env): Use getenv instead of GET_ENVIRONMENT.
* config/alpha/alpha.c: Include "splay-tree.h" instead of
<splay-tree.h>.
* config/arm/arm.c (arm_target_help): Use getenv instead of
GET_ENVIRONMENT.
* config/avr/driver-avr.c: Don't include <stdlib.h>.
* config/frv/frv.c: Don't include <ctype.h>.
* config/host-darwin.c: Don't include <sys/mman.h>.
* config/host-hpux.c: Don't include <sys/mman.h> or <unistd.h>.
(MAP_FAILED): Don't define.
* config/host-linux.c: Don't include <sys/mman.h> or <limits.h>.
* config/host-solaris.c: Don't include <sys/mman.h>.
* config/i386/cygming.h: Don't include <stdio.h>.
* config/i386/driver-i386.c: Don't include <stdlib.h>.
* config/i386/host-cygwin.c: Don't include <sys/mman.h>.
* config/iq2000/iq2000.c: Don't include <signal.h>.
* config/m32c/m32c-pragma.c: Don't include <stdio.h>.
* config/m68hc11/m68hc11.c: Don't include <stdio.h>.
* config/mep/mep-pragma.c: Don't include <stdio.h>.
* config/microblaze/microblaze.c: Don't include <signal.h>.
* config/mips/mips.c: Don't include <signal.h>.
* config/rs6000/host-darwin.c: Don't include <signal.h>.
* cppdefault.c (cpp_relocated): Use getenv instead of
GET_ENVIRONMENT.
* defaults.h (GET_ENVIRONMENT): Don't define.
* et-forest.h: Don't include <ansidecl.h> or <stddef.h>.
* gcc.c: Don't include <signal.h>, <sys/mman.h> or <sys/types.h>.
(SIGCHLD, MAP_FAILED, kill): Don't define.
(process_command): Use getenv instead of GET_ENVIRONMENT.
* genhooks.c: Don't include <string.h>.
* ggc-common.c: Don't include <sys/resource.h>, <sys/mman.h> or
<sys/types.h>.
(MAP_FAILED): Don't define.
* ggc-page.c Don't include <sys/mman.h>.
(MAP_ANONYMOUS, MAP_FAILED): Don't define.
* ggc-zone.c: Don't include <sys/mman.h>.
(MAP_ANONYMOUS, MAP_FAILED): Don't define.
* graph.c: Include "config.h" instead of <config.h>.
* incpath.c (add_env_var_paths): Use getenv instead of
GET_ENVIRONMENT.
* lto-wrapper.c: Don't include <errno.h>, <signal.h> or
"libiberty.h".
(SIGCHLD, kill): Don't define.
* mips-tfile.c: Don't include <signal.h>.
* opts.c: Don't include <signal.h> or <sys/resource.h>.
(print_specific_help): Use getenv instead of GET_ENVIRONMENT.
* passes.c: Don't include <signal.h>, <sys/resource.h> or
<sys/times.h>.
* sparseset.h: Don't include <assert.h>.
* timevar.c: Don't include <sys/times.h> or <sys/resource.h>.
* tlink.c: Don't include "libiberty.h".
* toplev.c: Don't include <signal.h> or <sys/times.h>.
* tree-mudflap.c: Include "demangle.h" instead of <demangle.h>.
* tree-switch-conversion.c: Don't include <signal.h>.
* vmsdbgout.c: Don't include <errno.h> or <string.h>.
c-family:
* c-opts.c (check_deps_environment_vars): Use getenv instead of
GET_ENVIRONMENT.
* c-pch.c (O_BINARY): Don't define here.
* c-pragma.h: Include "cpplib.h" instead of <cpplib.h>.
fortran:
* gfortran.h (alloca): Don't include definitions.
(NULL): Don't define.
java:
* boehm.c: Include "config.h" instead of <config.h>.
* builtins.c: Don't include <stdarg.h>.
* class.c: Don't include "stdio.h".
(O_BINARY): Don't define here.
* jcf-depend.c: Don't include <assert.h>.
(jcf_dependency_set_dep_file, jcf_dependency_init,
jcf_dependency_write): Use gcc_assert.
* jcf-io.c (O_BINARY): Don't define here.
* jcf-path.c: Don't include "tm.h".
(jcf_path_init): Use getenv instead of GET_ENVIRONMENT.
* resource.c: Don't include "stdio.h".
(O_BINARY): Don't define here.
* verify-impl.c: Don't include <stdio.h>.
lto:
* lto-endian.h: Delete.
* lto-object.c: Don't include "libiberty.h".
(O_BINARY): Don't define.
* lto.c: Don't include "libiberty.h" or <sys/mman.h>.
(O_BINARY): Don't define.
Nicola Pero [Mon, 29 Nov 2010 03:15:40 +0000 (03:15 +0000)]
In gcc/objc/: 2010-11-29 Nicola Pero <nicola.pero@meta-innovation.com>
In gcc/objc/:
2010-11-29 Nicola Pero <nicola.pero@meta-innovation.com>
* objc-act.c (objc_eh_runtime_type): Avoid ICE if error_mark_node
is passed as argument.
(objc_begin_catch_clause): Added code to deal with an
error_mark_node or NULL_TREE argument. Improved checks for
invalid arguments. Added code to traverse typedefs.
In gcc/testsuite/:
2010-11-29 Nicola Pero <nicola.pero@meta-innovation.com>
In gcc/cp/:
2010-11-29 Nicola Pero <nicola.pero@meta-innovation.com>
* parser.c (cp_parser_objc_try_catch_finally_statement): Parse
@catch(...) and pass NULL_TREE to objc_begin_catch_clause() in
that case. Improved error recovery. Reorganized code to be
almost identical to c_parser_objc_try_catch_finally_statement.
In gcc/:
2010-11-29 Nicola Pero <nicola.pero@meta-innovation.com>
* c-parser.c (c_parser_objc_try_catch_statement): Renamed to
c_parser_objc_try_catch_finally_statement for consistency with the
C++ parser. Parse @catch(...) and pass NULL_TREE to
objc_begin_catch_clause() in that case. Improved error recovery.
Reorganized code to be almost identical to
cp_parser_objc_try_catch_finally_statement.
Paul Thomas [Sun, 28 Nov 2010 13:47:26 +0000 (13:47 +0000)]
re PR fortran/35810 ([TR 15581 / F2003] Automatic reallocation on assignment to allocatable variables)
2010-11-28 Paul Thomas <pault@gcc.gnu.org>
PR fortran/35810
* trans-array.c (gfc_trans_array_constructor): If the loop->to
is a VAR_DECL, assume this is dynamic. In this case, use the
counter to obtain the value and set loop->to appropriately.
(gfc_conv_ss_descriptor): Always save the offset of a variable
in info.saved_offset.
(gfc_conv_ss_startstride): Do not attempt bound checking of the
lhs of an assignment, if allocatable and f2003 is allowed.
(gfc_conv_loop_setup): If possible, do not use an allocatable
lhs variable for the loopspec.
(gfc_is_reallocatable_lhs): New function.
(get_std_lbound): New function.
(gfc_alloc_allocatable_for_assignment): New function.
* gfortran.h : Add flag_realloc_lhs to the options structure.
* lang.opt : Add option f(no-)realloc-lhs.
* invoke.texi : Document option f(no-)realloc-lhs.
* options.c (gfc_init_options, gfc_post_options,
gfc_handle_option): Incorporate f(no-)realloc-lhs with default
to frealloc_lhs for -std > f95.
* trans-array.h : Add primitive for previous.
* trans-expr.c (gfc_conv_string_length): Return if character
length is a variable and the expression is NULL.
(gfc_conv_procedure_call): If the call is of the kind x = f(...)
and the lhs is allocatable and reallocation on assignment OK,
call gfc_alloc_allocatable_for_assignment. Do not generate the
function call unless direct by reference.
(realloc_lhs_loop_for_fcn_call): New function.
(realloc_lhs_bounds_for_intrinsic_call): New function.
(gfc_trans_arrayfunc_assign): Reallocation assignments need
a loopinfo and for the loop bounds to be set. With intrinsic
functions, free the lhs data and let the library allocate the
data array. Done by the new functions above.
(gfc_trans_assignment_1): If the lhs is allocatable and
reallocation on assignment is allowed, mark the lhs and use
gfc_alloc_allocatable_for_assignment to make the reallocation.
* trans.h : Add is_alloc_lhs bitfield to gfc_ss structure.
2010-11-28 Paul Thomas <pault@gcc.gnu.org
PR fortran/35810
* gfortran.dg/realloc_on_assign_1.f03: New test.
* gfortran.dg/realloc_on_assign_2.f03: New test.
* gfortran.dg/transpose_2.f90: dg-option -fno-realloc-lhs.
* gfortran.dg/unpack_bounds_1.f90: The same.
* gfortran.dg/cshift_bounds_2.f90: The same.
* gfortran.dg/matmul_bounds_2.f90: The same.
* gfortran.dg/matmul_bounds_3.f90: The same.
* gfortran.dg/matmul_bounds_4.f90: The same.
* gfortran.dg/matmul_bounds_5.f90: The same.
Jan Hubicka [Sat, 27 Nov 2010 19:37:00 +0000 (20:37 +0100)]
dwarf2out.c (dwarf2out_begin_function): Set cold_text_section and output cold_text_section_label.
* dwarf2out.c (dwarf2out_begin_function): Set cold_text_section
and output cold_text_section_label.
(dwarf2out_init): Don't do that there.
(dwarf2out_finish): Handle cold section end label only if cold
section was used.
Nicola Pero [Sat, 27 Nov 2010 18:17:14 +0000 (18:17 +0000)]
In gcc/cp/: 2010-11-27 Nicola Pero <nicola.pero@meta-innovation.com>
In gcc/cp/:
2010-11-27 Nicola Pero <nicola.pero@meta-innovation.com>
PR objc++/46222
* decl.c (grokdeclarator): Replaced an assert (for a case that can
never happen in C++, but could happen in ObjC++ for invalid code)
with a check that prints an error message and returns
error_mark_node.
In gcc/testsuite/:
2010-11-27 Nicola Pero <nicola.pero@meta-innovation.com>
François Dumont [Sat, 27 Nov 2010 13:09:47 +0000 (14:09 +0100)]
unordered_map (unordered_multimap<>::erase): Fix to erase all elements associated to the key.
2010-11-27 François Dumont <francois.cppdevs@free.fr>
* include/debug/unordered_map (unordered_multimap<>::erase): Fix to
erase all elements associated to the key.
* include/debug/unordered_set (unordered_multiset<>::erase): Likewise.
* testsuite/23_containers/unordered_multimap/erase/1.cc: Modify to
check for multiple erase.
* testsuite/23_containers/unordered_multiset/erase/1.cc: Likewise.
François Dumont [Sat, 27 Nov 2010 12:51:58 +0000 (13:51 +0100)]
2010-11-27 François Dumont <francois.cppdevs@free.fr>
* include/debug/unordered_map, unordered_set (unordered_map<>::insert,
unordered_multimap<>::insert, unordered_set<>::insert,
unordered_multiset<>::insert) Debug check iterator hint and pass it to
normal implementation.
Nicola Pero [Sat, 27 Nov 2010 10:06:59 +0000 (10:06 +0000)]
In gcc/objc/: 2010-11-27 Nicola Pero <nicola.pero@meta-innovation.com>
In gcc/objc/:
2010-11-27 Nicola Pero <nicola.pero@meta-innovation.com>
Implemented optional properties.
* objc-act.h (PROPERTY_OPTIONAL): New.
* objc-act.c (objc_add_property_declaration): Set
PROPERTY_OPTIONAL if appropriate.
(finish_class): When generating definitions of setter and getter
methods associated with a property for a protocol, mark them as
optional if the property is optional.
(maybe_make_artificial_property_decl): Added 'getter_name'
argument. Set PROPERTY_OPTIONAL.
(objc_maybe_build_component_ref): Updated calls to
maybe_make_artificial_property_decl. Added code for optional,
readonly properties.
(objc_build_class_component_ref): Updated call to
maybe_make_artificial_property_decl.
In gcc/testsuite/:
2010-11-27 Nicola Pero <nicola.pero@meta-innovation.com>
François Dumont [Sat, 27 Nov 2010 10:04:19 +0000 (11:04 +0100)]
bitset (bitset<>::reference): Clean code, use normal reference type in experimental mode.
2010-11-27 François Dumont <francois.cppdevs@free.fr>
* include/debug/bitset (bitset<>::reference): Clean code, use normal
reference type in experimental mode.
* testsuite/23_containers/bitset/debug/invalid/1.cc: Fix for
experimental mode.
Nicola Pero [Sat, 27 Nov 2010 09:53:43 +0000 (09:53 +0000)]
In gcc/objc/: 2010-11-27 Nicola Pero <nicola.pero@meta-innovation.com>
In gcc/objc/:
2010-11-27 Nicola Pero <nicola.pero@meta-innovation.com>
* objc-act.c (objc_build_struct): Fixed loops that save and
restore TYPE_OBJC_INFO to iterate over all variants of the type; a
special case for the current type is then no longer required.
Duplicate TYPE_LANG_SPECIFIC for each type before restoring
TYPE_OBJC_INFO.
(objc_get_protocol_qualified_type): Updated comments.
In gcc/testsuite/:
2010-11-27 Nicola Pero <nicola.pero@meta-innovation.com>
Rainer Orth [Fri, 26 Nov 2010 17:36:42 +0000 (17:36 +0000)]
gnat.exp: Load gcc.exp.
* lib/gnat.exp: Load gcc.exp.
(gnat_target_compile): Use gcc_target_compile for *.c sources.
* gnat.dg/sse_nolib.adb: Use dg-require-effective-target sse_runtime.
Richard Guenther [Fri, 26 Nov 2010 16:12:49 +0000 (16:12 +0000)]
re PR lto/46648 (type mismatch in array reference; verify_stmts failed)
2010-11-26 Richard Guenther <rguenther@suse.de>
PR lto/46648
* gimple.c (gtc_visit): Do not return true for members of an
SCC still being processed but the current lattice value of
the member. Treat SCC members comparison state as lattice,
starting at equal, eventually dropping to unequal.
(gimple_types_compatible_p_1): Likewise.
* gcc.dg/lto/20101125-1_0.c: New testcase.
* gcc.dg/lto/20101125-1_1.c: Likewise.
re PR target/33637 ("checking for nm: test: too many arguments" causes "Undefined symbol: __gxx_personality_v0")
PR target/33637
* configure.ac: Accept extra arguments for AS_FOR_TARGET,
LD_FOR_TARGET, NM_FOR_TARGET, OBJDUMP_FOR_TARGET.
* configure: Regenerated.
* exec-tool.in: Not quoting command, may have extra arguments.
Jakub Jelinek [Fri, 26 Nov 2010 09:38:54 +0000 (10:38 +0100)]
re PR middle-end/46647 (Can't inline memset with -1)
PR middle-end/46647
* builtins.c (fold_builtin_memset): Check c is INTEGER_CST instead
of host_integerp check. Use TREE_INT_CST_LOW instead of tree_low_cst.