https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91109
Bernd Edlinger <bernd.edlinger at hotmail dot de> changed:
What |Removed |Added
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CC| |bernd.edlinger at hotmail dot
de
--- Comment #4 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
hmm, funny, I saw this test case failing since february at least:
https://gcc.gnu.org/ml/gcc-testresults/2019-02/msg02686.html
FAIL: gcc.c-torture/execute/20040709-1.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects execution test
--with-arch=armv7-a --with-tune=cortex-a9 --with-fpu=vfpv3-d16
--with-float=hard
I have not looked into it before, but
to me it looks like a reload bug:
str r6, [r5] <= r5 still valid
stm r9, {r0, r1, r2, r3}
umull r5, r3, r7, fp <= r5 clobbered
ldr r2, [r4, #176]
lsr r9, r3, #3
mov r3, r0
eor r3, r3, r2
rsb r9, r9, r9, lsl #4
tst r3, r10
sub r9, fp, r9
bne .L29
ldrh r2, [sp, #176]
ldrh r3, [r4, #176]
eor r2, r2, r3
ubfx r2, r2, #0, #12
cmp r2, #0
bne .L29
cmp r9, r9
bne .L29
mla r6, r8, r6, lr
ldr fp, .L79+36
mla lr, r8, r6, lr
ubfx r6, r6, #16, #11
bfi r3, r6, #0, #12
strh r3, [r4, #176] @ movhi
uxth r8, r3
ldm fp, {r0, r1, r2, r3}
ubfx ip, lr, #16, #11
add r7, r6, ip
add ip, sp, #176
bfi r8, r7, #0, #12
str lr, [r5] <= r5 invalid
reload:
(insn 6826 3453 6816 129 (parallel [
(set (reg:SI 3 r3 [4187])
(truncate:SI (lshiftrt:DI (mult:DI (zero_extend:DI (reg:SI 11
fp [4186]))
(zero_extend:DI (reg:SI 7 r7 [4188])))
(const_int 32 [0x20]))))
(clobber (reg:SI 5 r5 [5970]))
]) "20040709-1.c":108:291 70 {*umulsi3_highpart_v6}
(nil))
[...]
(insn 3509 3530 3531 132 (set (mem/c:SI (reg/f:SI 5 r5 [5715]) [1
s.5566D.5531+0 S4 A32])
(reg:SI 14 lr [orig:692 D.6083 ] [692])) "20040709-1.c":13:5 654
{*arm_movsi_vfp}
(nil))
