test.c
----------------------
int
main () {
char ba[8] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08};
short a[4] = { 0x04, 0x05, 0x06, 0x07};
int c = *((int *)(&a[1]));
int d = *((int *)(&ba[1]));
printf("%08x\n", c );
printf("%08x\n", d );
return 0;
}
-----
sh-elf-linux -m4a -O2 -S test.c
this code maybe cause data address error exception.
movua.l instruction might not have to be output for sh4a.
...
mov.l .L3,r1
add #-16,r15
mov.l .L4,r2
mov r15,r14
movua.l @r1+,r0
mov r14,r3
add #8,r3
mov.l .L5,r9
mov.l r0,@r3
movua.l @r2+,r0
mov r0,r6
mov.l @r1,r0
mov.l r6,@r14
mov r14,r1
mov.l @r2,r6 <--- maybe wrong eliminate movua.l
add #2,r1
mov.l .L6,r8
mov.l r0,@(4,r3)
mov.l r6,@(4,r14)
mov.l @r1,r5
jsr @r9
mov r8,r4
mov r14,r1
add #9,r1
mov.l @r1,r5 <--- maybe cause data address error.
jsr @r9
mov r8,r4
add #16,r14
................
--
Summary: maybe bug output for sh4a
Product: gcc
Version: 4.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tyokota at k2 dot dion dot ne dot jp
GCC target triplet: sh-elf-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28229
