diff options
Diffstat (limited to 'gcc/alias.c')
| -rw-r--r-- | gcc/alias.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/gcc/alias.c b/gcc/alias.c index db89ecc..fb493f8 100644 --- a/gcc/alias.c +++ b/gcc/alias.c @@ -1424,10 +1424,15 @@ nonlocal_reference_p (x) if (GET_RTX_CLASS (code) == 'i') { - /* Constant functions are constant. */ + /* Constant functions can be constant if they don't use + scratch memory used to mark function w/o side effects. */ if (code == CALL_INSN && CONST_CALL_P (x)) - return 0; - x = PATTERN (x); + { + x = CALL_INSN_FUNCTION_USAGE (x); + if (!x) return 0; + } + else + x = PATTERN (x); code = GET_CODE (x); } @@ -1520,7 +1525,7 @@ nonlocal_reference_p (x) for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--) { - if (fmt[i] == 'e') + if (fmt[i] == 'e' && XEXP (x, i)) { if (nonlocal_reference_p (XEXP (x, i))) return 1; |