===================================================================
@@ -1307,7 +1307,21 @@
subreg_p = GET_CODE (*loc) == SUBREG;
if (subreg_p)
- loc = &SUBREG_REG (*loc);
+ {
+ reg = SUBREG_REG (*loc);
+ mode = GET_MODE (reg);
+
+ /* For mode with size bigger than ptr_mode, there unlikely to be "mov"
+ between two registers with different classes, but there normally will
+ be "mov" which transfers element of vector register into the general
+ register, and this normally will be a subreg which should be reloaded
+ as a whole. This is particularly likely to be triggered when
+ -fno-split-wide-types specified. */
+ if (in_class_p (reg, cl, &new_class)
+ || GET_MODE_SIZE (mode) <= GET_MODE_SIZE (ptr_mode))
+ loc = &SUBREG_REG (*loc);
+ }
+
reg = *loc;
mode = GET_MODE (reg);
if (! REG_P (reg))