This is from a -O1 of syntax.c - note how it stamps on r2 as a temp
which is the 1st variadic argument before it gets to stack the original.
.global syntax_error <<<<< void syntax_error(struct info *info, const
char *format, ...) {
.thumb
.thumb_func
.type syntax_error, %function
syntax_error:
.fnstart
.LFB100:
.loc 1 116 0
.cfi_startproc
@ args = 4, pretend = 12, frame = 8
@ frame_needed = 0, uses_anonymous_args = 1
.loc 1 120 0
ldr r3, [r0, #0]
ldr r3, [r3, #0]
subs r2, r3, #6 !!!!!
it ne
movne r2, #1
cmp r3, #0
ite eq
moveq r3, #0
andne r3, r2, #1
cbnz r3, .L153
.loc 1 116 0
push {r1, r2, r3}
.save {r1, r2, r3}
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https://bugs.launchpad.net/bugs/758082
Title:
[armel] segfaults in make check pass when built with optimization
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