diff options
Diffstat (limited to 'gcc/rtlanal.c')
| -rw-r--r-- | gcc/rtlanal.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index 94e8d4c8033..e822e38ec64 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -3158,13 +3158,17 @@ parms_set (rtx x, rtx pat ATTRIBUTE_UNUSED, void *data) } } +/* APPLE LOCAL begin 4045984 */ /* Look backward for first parameter to be loaded. + Note that loads of all parameters will not necessarily be + found if CSE has eliminated some of them (e.g., an argument + to the outer function is passed down as a parameter). Do not skip BOUNDARY. */ rtx find_first_parameter_load (rtx call_insn, rtx boundary) { struct parms_set_data parm; - rtx p, before; + rtx p, before, first_set; /* Since different machines initialize their parameter registers in different orders, assume nothing. Collect the set of all @@ -3186,6 +3190,7 @@ find_first_parameter_load (rtx call_insn, rtx boundary) parm.nregs++; } before = call_insn; + first_set = call_insn; /* Search backward for the first set of a register in this set. */ while (parm.nregs && before != boundary) @@ -3208,11 +3213,16 @@ find_first_parameter_load (rtx call_insn, rtx boundary) } if (INSN_P (before)) - note_stores (PATTERN (before), parms_set, &parm); + { + int nregs_old = parm.nregs; + note_stores (PATTERN (before), parms_set, &parm); + if (nregs_old != parm.nregs) + first_set = before; + } } - return before; + return first_set; } - +/* APPLE LOCAL end 4045984 */ /* Return true if we should avoid inserting code between INSN and preceding call instruction. */ |