Fixes -Os breakage showing up as 3 testsuite fails like the following,
caused by add<mode>3 losing r0 as a valid source reg.
insn does not satisfy its constraints:
(insn 98 97 99 2 (set (reg:SI 11 11)
(plus:SI (reg:SI 0 0)
(const_int 80 [0x50])))
/src/gcc-current/gcc/testsuite/gcc.target/powerpc/savres.c:112 80 {*addsi3}
(expr_list:REG_DEAD (reg:SI 0 0)
(nil)))
Bootstrap and regression test in progress.
* config/rs6000/rs6000.c (rs6000_emit_epilogue): Use addsi3_carry
or adddi3_carry when restoring frame_reg_rtx from r0 after restvr.
Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c (revision 220611)
+++ gcc/config/rs6000/rs6000.c (working copy)
@@ -24977,7 +24977,12 @@ rs6000_emit_epilogue (int sibcall)
rtx offset = GEN_INT (end_save + ptr_off);
frame_off = -end_save;
- emit_insn (gen_add3_insn (frame_reg_rtx, ptr_reg, offset));
+ if (TARGET_32BIT)
+ emit_insn (gen_addsi3_carry (frame_reg_rtx,
+ ptr_reg, offset));
+ else
+ emit_insn (gen_adddi3_carry (frame_reg_rtx,
+ ptr_reg, offset));
}
else
{
--
Alan Modra
Australia Development Lab, IBM
