When I use static inline attribute without any optimization as follows, stack
space is stacked. As a result, a stack overflow is caused. This problem came
from using gcc-4.2.0 for linux kernel which uses many inlines.
-compile options---------------------
sh4-linux-gcc -S test.c
-testcase #1-----------------------
static inline __attribute__((always_inline)) int add(int x, int y)
{
return x + y;
}
int x, y;
main(int ac, char** av)
{
x = add(x, y);
return x;
}
-testcase #2-----------------------
static inline __attribute__((always_inline)) int add(int x, int y)
{
return x + y;
}
int x, y;
main(int ac, char** av)
{
x = add(x, y);
x = add(x, y);
return x;
}
-assembled code for testcase #1---------------------------
.global main
.type main, @function
main:
mov.l r14,@-r15
add #-16,r15
mov r15,r14
mov r14,r1
add #-48,r1
mov.l r4,@(52,r1)
...
-assembled code for testcase #2---------------------------
.global main
.type main, @function
main:
mov.l r14,@-r15
add #-24,r15 <-- stack grows down
mov r15,r14
mov r14,r1
add #-40,r1
mov.l r4,@(44,r1)
...
--
Summary: [SH] static inline attribute causes stack overflow
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: saito at densan dot co dot jp
GCC build triplet: sh4-linux
GCC host triplet: sh4-linux
GCC target triplet: sh4-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32577
