diff options
Diffstat (limited to 'gcc/config/mips/mips.c')
| -rw-r--r-- | gcc/config/mips/mips.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c index 9912105..0b51c78 100644 --- a/gcc/config/mips/mips.c +++ b/gcc/config/mips/mips.c @@ -14697,6 +14697,46 @@ mips_epilogue_uses (unsigned int regno) return false; } + +/* A for_each_rtx callback. Stop the search if *X is an AT register. */ + +static int +mips_at_reg_p (rtx *x, void *data ATTRIBUTE_UNUSED) +{ + return GET_CODE (*x) == REG && REGNO (*x) == AT_REGNUM; +} + + +/* Implement FINAL_PRESCAN_INSN. */ + +void +mips_final_prescan_insn (rtx insn, rtx *opvec, int noperands) +{ + int i; + + /* We need to emit ".set noat" before an instruction that accesses + $1 (AT). */ + if (recog_memoized (insn) >= 0) + for (i = 0; i < noperands; i++) + if (for_each_rtx (&opvec[i], mips_at_reg_p, NULL)) + if (set_noat++ == 0) + fprintf (asm_out_file, "\t.set\tnoat\n"); +} + +/* Implement TARGET_ASM_FINAL_POSTSCAN_INSN. */ + +void +mips_final_postscan_insn (FILE *file, rtx insn, rtx *opvec, int noperands) +{ + int i; + + /* Close any ".set noat" block opened by mips_final_prescan_insn. */ + if (recog_memoized (insn) >= 0) + for (i = 0; i < noperands; i++) + if (for_each_rtx (&opvec[i], mips_at_reg_p, NULL)) + if (--set_noat == 0) + fprintf (file, "\t.set\tat\n"); +} /* Initialize the GCC target structure. */ #undef TARGET_ASM_ALIGNED_HI_OP @@ -14865,6 +14905,9 @@ mips_epilogue_uses (unsigned int regno) #undef TARGET_IRA_COVER_CLASSES #define TARGET_IRA_COVER_CLASSES mips_ira_cover_classes +#undef TARGET_ASM_FINAL_POSTSCAN_INSN +#define TARGET_ASM_FINAL_POSTSCAN_INSN mips_final_postscan_insn + struct gcc_target targetm = TARGET_INITIALIZER; #include "gt-mips.h" |