diff options
Diffstat (limited to 'gcc/config/aarch64/aarch64.c')
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index 1f851cbf64a..54697b72134 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -14277,13 +14277,23 @@ aarch_macro_fusion_pair_p (rtx_insn *prev, rtx_insn *curr) { enum attr_type prev_type = get_attr_type (prev); - /* FIXME: this misses some which is considered simple arthematic - instructions for ThunderX. Simple shifts are missed here. */ - if (prev_type == TYPE_ALUS_SREG - || prev_type == TYPE_ALUS_IMM - || prev_type == TYPE_LOGICS_REG - || prev_type == TYPE_LOGICS_IMM) - return true; + unsigned int condreg1, condreg2; + rtx cc_reg_1; + aarch64_fixed_condition_code_regs (&condreg1, &condreg2); + cc_reg_1 = gen_rtx_REG (CCmode, condreg1); + + if (reg_referenced_p (cc_reg_1, PATTERN (curr)) + && prev + && modified_in_p (cc_reg_1, prev)) + { + /* FIXME: this misses some which is considered simple arthematic + instructions for ThunderX. Simple shifts are missed here. */ + if (prev_type == TYPE_ALUS_SREG + || prev_type == TYPE_ALUS_IMM + || prev_type == TYPE_LOGICS_REG + || prev_type == TYPE_LOGICS_IMM) + return true; + } } return false; |