diff options
Diffstat (limited to 'gcc/calls.c')
| -rw-r--r-- | gcc/calls.c | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/gcc/calls.c b/gcc/calls.c index 3552737..592f8bc 100644 --- a/gcc/calls.c +++ b/gcc/calls.c @@ -1785,45 +1785,6 @@ purge_reg_equiv_notes (void) } } -/* Clear RTX_UNCHANGING_P flag of incoming argument MEMs. */ - -static void -purge_mem_unchanging_flag (rtx x) -{ - RTX_CODE code; - int i, j; - const char *fmt; - - if (x == NULL_RTX) - return; - - code = GET_CODE (x); - - if (code == MEM) - { - if (RTX_UNCHANGING_P (x) - && (XEXP (x, 0) == current_function_internal_arg_pointer - || (GET_CODE (XEXP (x, 0)) == PLUS - && XEXP (XEXP (x, 0), 0) == - current_function_internal_arg_pointer - && GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT))) - RTX_UNCHANGING_P (x) = 0; - return; - } - - /* Scan all subexpressions. */ - fmt = GET_RTX_FORMAT (code); - for (i = 0; i < GET_RTX_LENGTH (code); i++, fmt++) - { - if (*fmt == 'e') - purge_mem_unchanging_flag (XEXP (x, i)); - else if (*fmt == 'E') - for (j = 0; j < XVECLEN (x, i); j++) - purge_mem_unchanging_flag (XVECEXP (x, i, j)); - } -} - - /* Generate all the code for a function call and return an rtx for its value. Store the value in TARGET (specified as an rtx) if convenient. @@ -3004,22 +2965,6 @@ expand_call (tree exp, rtx target, int ignore) if (args[i].aligned_regs) free (args[i].aligned_regs); - /* If this function is returning into a memory location marked as - readonly, it means it is initializing that location. We normally treat - functions as not clobbering such locations, so we need to specify that - this one does. We do this by adding the appropriate CLOBBER to the - CALL_INSN function usage list. This cannot be done by emitting a - standalone CLOBBER after the call because the latter would be ignored - by at least the delay slot scheduling pass. We do this now instead of - adding to call_fusage before the call to emit_call_1 because TARGET - may be modified in the meantime. */ - if (structure_value_addr != 0 && target != 0 - && MEM_P (target) && RTX_UNCHANGING_P (target)) - add_function_usage_to - (last_call_insn (), - gen_rtx_EXPR_LIST (VOIDmode, gen_rtx_CLOBBER (VOIDmode, target), - NULL_RTX)); - insns = get_insns (); end_sequence (); @@ -3100,32 +3045,7 @@ expand_call (tree exp, rtx target, int ignore) void fixup_tail_calls (void) { - rtx insn; - tree arg; - purge_reg_equiv_notes (); - - /* A sibling call sequence also may invalidate RTX_UNCHANGING_P - flag of some incoming arguments MEM RTLs, because it can write into - those slots. We clear all those bits now. - - This is (slight) overkill, we could keep track of which arguments - we actually write into. */ - for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) - { - if (INSN_P (insn)) - purge_mem_unchanging_flag (PATTERN (insn)); - } - - /* Similarly, invalidate RTX_UNCHANGING_P for any incoming - arguments passed in registers. */ - for (arg = DECL_ARGUMENTS (current_function_decl); - arg; - arg = TREE_CHAIN (arg)) - { - if (REG_P (DECL_RTL (arg))) - RTX_UNCHANGING_P (DECL_RTL (arg)) = false; - } } /* Traverse an argument list in VALUES and expand all complex |