https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71709
Bug ID: 71709
Summary: powerpc64le: argument to strcpy() optimised out
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: anton at samba dot org
Target Milestone: ---
The following test case fails on ppc64le:
#include <string.h>
char boot_command_line[2048];
char *saved_command_line;
static char *static_command_line;
static char *initcall_command_line;
void *memblock_virt_alloc(int, int);
void setup_command_line(char *command_line)
{
saved_command_line =
memblock_virt_alloc(strlen(boot_command_line) + 1, 0);
initcall_command_line =
memblock_virt_alloc(strlen(boot_command_line) + 1, 0);
static_command_line = memblock_virt_alloc(strlen(command_line) + 1, 0);
strcpy(saved_command_line, boot_command_line);
strcpy(static_command_line, command_line);
}
When built with:
# gcc -fno-common -mcmodel=medium -O2
The last strcpy() call has lost its first argument:
bl memblock_virt_alloc
nop
addis 3,2,.LANCHOR0+2048@toc@ha # gpr load fusion, type long
ld 3,.LANCHOR0+2048@toc@l(3)
mr 4,31
bl strcpy
nop
mr 4,30
bl strcpy
