https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88963
Devin Hussey <husseydevin at gmail dot com> changed:
What |Removed |Added
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CC| |husseydevin at gmail dot com
--- Comment #4 from Devin Hussey <husseydevin at gmail dot com> ---
Strangely, this doesn't seem to affect the ARM or aarch64 backends, although I
am on a December build (specifically Dec 29). 8.2 is also unaffected.
arm-none-eabi-gcc -mfloat-abi=hard -mfpu=neon -march=armv7-a -O3 -S test.c
test:
vldmia r1, {d0-d7}
vldmia r2, {d24-d31}
vadd.i32 q8, q0, q12
vadd.i32 q9, q1, q13
vadd.i32 q10, q2, q14
vadd.i32 q11, q3, q15
vstmia r0, {d16-d23}
bx lr
aarch64-none-eabi-gcc -O3 -S test.c
test:
ld1 {v16.16b - v19.16b}, [x1]
ld1 {v4.16b - v7.16b}, [x2]
add v0.4s, v16.4s, v4.4s
add v1.4s, v17.4s, v5.4s
add v2.4s, v18.4s, v6.4s
add v3.4s, v19.4s, v7.4s
st1 {v0.16b - v3.16b}, [x0]
ret
Amusingly, Clang trunk for ARMv7-a has a similar issue (aarch64 is fine).
test:
.fnstart
.save {r11, lr}
push {r11, lr}
add r3, r1, #48
mov lr, r1
mov r12, r2
vld1.64 {d20, d21}, [r3]
add r3, r2, #48
add r1, r1, #32
vld1.32 {d16, d17}, [lr]!
vld1.32 {d18, d19}, [r12]!
vadd.i32 q8, q9, q8
vld1.64 {d22, d23}, [r3]
vadd.i32 q10, q11, q10
vld1.64 {d26, d27}, [r1]
add r1, r2, #32
vld1.64 {d28, d29}, [r1]
add r1, r0, #48
vadd.i32 q11, q14, q13
vld1.64 {d24, d25}, [lr]
vld1.64 {d18, d19}, [r12]
vadd.i32 q9, q9, q12
vst1.64 {d20, d21}, [r1]
add r1, r0, #32
vst1.32 {d16, d17}, [r0]!
vst1.64 {d22, d23}, [r1]
vst1.64 {d18, d19}, [r0]
pop {r11, pc}
