The following code does not treat volatile struct members as volatile,
assuming such declarations are valid; if not would exect a warning:
typedef struct {
volatile int a;
volatile int b;
} s;
int main (void){
s x = {0, 1};
s y = {2, 3};
x = y;
y = x;
return x.a + y.a;
}
generates:
000000c6 <main>:
volatile int a;
volatile int b;
} s;
int main (void){
c6: cf ef ldi r28, 0xFF ; 255
c8: d0 e1 ldi r29, 0x10 ; 16
ca: de bf out 0x3e, r29 ; 62
cc: cd bf out 0x3d, r28 ; 61
s x = {0, 1};
s y = {2, 3};
x = y;
y = x;
return x.a + y.a;
}
ce: 84 e0 ldi r24, 0x04 ; 4
d0: 90 e0 ldi r25, 0x00 ; 0
d2: 0c 94 6b 00 jmp 0xd6 <_exit>
--
Summary: wrong code for volatile struct members?
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: schlie at comcast dot net
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: ppc-apple-darwin7.8
GCC host triplet: ppc-apple-darwin7.8
GCC target triplet: avr-unknown-unknown
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20127
