https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94442
--- Comment #6 from xiezhiheng at huawei dot com ---
I'm trying to modify get_inner_reference to handle the case
for MEM[ptr, off].
I extract the "off" and add it to the recorded offset, then I
build a MEM[ptr, 0] and return it later.
Like this
}
exp = TREE_OPERAND (TREE_OPERAND (exp, 0), 0);
}
+ else if (TREE_CODE (TREE_OPERAND (exp, 0)) == SSA_NAME)
+ {
+ tree off = TREE_OPERAND (exp, 1);
+ if (!integer_zerop (off))
+ {
+ poly_offset_int boff = mem_ref_offset (exp);
+ boff <<= LOG2_BITS_PER_UNIT;
+ bit_offset += boff;
+
+ exp = build2 (MEM_REF, TREE_TYPE (exp),
+ TREE_OPERAND (exp, 0),
+ build_int_cst (TREE_TYPE (off), 0));
+ }
+ }
goto done;
default:
Assembly with the patch looks like:
.L6:
ldp q3, q2, [x0, 64]
add w2, w2, 1
sqadd v1.16b, v1.16b, v3.16b
sqadd v0.16b, v0.16b, v2.16b
sqadd v1.16b, v1.16b, v3.16b
sqadd v0.16b, v0.16b, v2.16b
sqadd v3.16b, v3.16b, v1.16b
sqadd v2.16b, v2.16b, v0.16b
sqadd v1.16b, v1.16b, v3.16b
sqadd v0.16b, v0.16b, v2.16b
sqadd v1.16b, v1.16b, v3.16b
sqadd v0.16b, v0.16b, v2.16b
sqadd v3.16b, v3.16b, v1.16b
sqadd v2.16b, v2.16b, v0.16b
sqadd v1.16b, v1.16b, v3.16b
sqadd v0.16b, v0.16b, v2.16b
sqadd v5.16b, v1.16b, v3.16b
sqadd v4.16b, v0.16b, v2.16b
stp q1, q0, [x0]
sqadd v3.16b, v3.16b, v5.16b
sqadd v2.16b, v2.16b, v4.16b
sqadd v1.16b, v1.16b, v3.16b
sqadd v0.16b, v0.16b, v2.16b
stp q3, q2, [x0, 64]
stp q1, q0, [x0, 32]
cmp w1, w2
bne .L6
