diff options
Diffstat (limited to 'gcc/loop.c')
| -rw-r--r-- | gcc/loop.c | 44 |
1 files changed, 37 insertions, 7 deletions
@@ -2057,14 +2057,26 @@ rtx_equal_for_loop_p (rtx x, rtx y, struct loop_movables *movables, if (GET_MODE (x) != GET_MODE (y)) return 0; - /* These three types of rtx's can be compared nonrecursively. */ - if (code == REG) - return (REGNO (x) == REGNO (y) || regs_match_p (x, y, movables)); + /* These types of rtx's can be compared nonrecursively. */ + switch (code) + { + case PC: + case CC0: + case CONST_INT: + case CONST_DOUBLE: + return 0; - if (code == LABEL_REF) - return XEXP (x, 0) == XEXP (y, 0); - if (code == SYMBOL_REF) - return XSTR (x, 0) == XSTR (y, 0); + case REG: + return (REGNO (x) == REGNO (y) || regs_match_p (x, y, movables)); + + case LABEL_REF: + return XEXP (x, 0) == XEXP (y, 0); + case SYMBOL_REF: + return XSTR (x, 0) == XSTR (y, 0); + + default: + break; + } /* Compare the elements. If any pair of corresponding elements fail to match, return 0 for the whole things. */ @@ -3984,6 +3996,24 @@ rtx_equal_for_prefetch_p (rtx x, rtx y) if (code != GET_CODE (y)) return 0; + if (GET_MODE (x) != GET_MODE (y)) + return 0; + + switch (code) + { + case PC: + case CC0: + case CONST_INT: + case CONST_DOUBLE: + return 0; + + case LABEL_REF: + return XEXP (x, 0) == XEXP (y, 0); + + default: + break; + } + if (COMMUTATIVE_ARITH_P (x)) { return ((rtx_equal_for_prefetch_p (XEXP (x, 0), XEXP (y, 0)) |