diff options
Diffstat (limited to 'gcc/reload1.c')
| -rw-r--r-- | gcc/reload1.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/gcc/reload1.c b/gcc/reload1.c index c70694b..a6e41dd 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -9162,8 +9162,16 @@ reload_cse_move2add (first) validate_change (insn, &SET_SRC (pat), reg, 0); else if (rtx_cost (new_src, PLUS) < rtx_cost (src, SET) && have_add2_insn (reg, new_src)) - validate_change (insn, &PATTERN (insn), - gen_add2_insn (reg, new_src), 0); + { + rtx newpat = gen_add2_insn (reg, new_src); + if (INSN_P (newpat) && NEXT_INSN (newpat) == NULL_RTX) + newpat = PATTERN (newpat); + /* If it was the first insn of a sequence or + some other emitted insn, validate_change will + reject it. */ + validate_change (insn, &PATTERN (insn), + newpat, 0); + } else { enum machine_mode narrow_mode; @@ -9243,9 +9251,15 @@ reload_cse_move2add (first) else if ((rtx_cost (new_src, PLUS) < COSTS_N_INSNS (1) + rtx_cost (src3, SET)) && have_add2_insn (reg, new_src)) - success - = validate_change (next, &PATTERN (next), - gen_add2_insn (reg, new_src), 0); + { + rtx newpat = gen_add2_insn (reg, new_src); + if (INSN_P (newpat) + && NEXT_INSN (newpat) == NULL_RTX) + newpat = PATTERN (newpat); + success + = validate_change (next, &PATTERN (next), + newpat, 0); + } if (success) delete_insn (insn); insn = next; |