Hi,
When -mstrict-align was added for RISC-V, there was a change for
riscv_valid_lo_sum_p:
@@ -726,7 +733,8 @@ riscv_valid_lo_sum_p (enum riscv_symbol_type
sym_type, enum
machine_mode mode)
/* We may need to split multiword moves, so make sure that each word
can be accessed without inducing a carry. */
if (GET_MODE_SIZE (mode) > UNITS_PER_WORD
- && GET_MODE_BITSIZE (mode) > GET_MODE_ALIGNMENT (mode))
+ && (!TARGET_STRICT_ALIGN
+ || GET_MODE_BITSIZE (mode) > GET_MODE_ALIGNMENT (mode)))
return false;
I cannot get the rationale of this change: shouldn't -mno-strict-align
make more lo_sum valid, instead of making less lo_sum invalid? I.e. why
it's not "TARGET_STRICT_ALIGN && size > align"?
Sorry for my stupidity, and, happy new year in advance.
--
Xi Ruoyao <[email protected]>
School of Aerospace Science and Technology, Xidian University
