Compilation *crashes* when -O argument is greater than 0 (i.e. -O1, -O2, or
-O3).
If -O0 is used (or -O is omitted) compilation *passes*.
Note that "a" below needs to be external to the function. If the line "char*
a;" is placed inside the test() function, compilation *passes*.
REDUCED TEST CASE:
File "test.c":
char* a;
void test()
{
a = "0";
a = a + 1;
return;
} /* test() */
OUTPUT:
mcore-elf-gcc -c -O2 test.c
test.c: In function 'test':
test.c:9: error: unrecognizable insn:
(insn 12 11 13 1 (set (reg:SI 26)
(const:SI (plus:SI (symbol_ref/f:SI ("*.LC0") [flags 0x2] <string_cst
0xb72f54a0>)
(const_int 1 [0x1])))) -1 (nil)
(nil))
test.c:9: internal compiler error: in extract_insn, at recog.c:2084
GCC CONFIGURATION:
% mcore-elf-gcc -v
Using built-in specs.
Target: mcore-elf
Configured with: /tmp/bld/gcc/gcc-4.1.2/configure --target=mcore-elf
--enable-languages=c,c++ --enable-multilib --with-gnu-as --with-gnu-ld
--with-newlib
--prefix=/_TOOLS_/dist/gnu-gcc-4.1.2-binutils-2.17-mcore-elf/i686-pc-linux2.4
Thread model: single
gcc version 4.1.2
OTHER RELEASES:
Test case fails in 4.1.1
Test case passes in 4.0.4
POSSIBLE DUPLICATES:
25690 -- Symptom is different (bug involves structure deference) but cause
might be the same (points to the same line of code in the compiler source)
--
Summary: Pointer Arithmetic Crash When Optimizing
Product: gcc
Version: 4.1.2
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: r dot slater at freescale dot com
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: mcore-elf
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31702
