diff options
Diffstat (limited to 'gcc/print-rtl.c')
| -rw-r--r-- | gcc/print-rtl.c | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/gcc/print-rtl.c b/gcc/print-rtl.c index 341ecdfedb8..3f15a216c96 100644 --- a/gcc/print-rtl.c +++ b/gcc/print-rtl.c @@ -564,6 +564,43 @@ rtx_writer::print_rtx_operand (const_rtx in_rtx, int idx) } } +/* Subroutine of rtx_writer::print_rtx. + In compact mode, determine if operand IDX of IN_RTX is interesting + to dump, or (if in a trailing position) it can be omitted. */ + +bool +rtx_writer::operand_has_default_value_p (const_rtx in_rtx, int idx) +{ + const char *format_ptr = GET_RTX_FORMAT (GET_CODE (in_rtx)); + + switch (format_ptr[idx]) + { + case 'e': + case 'u': + return XEXP (in_rtx, idx) == NULL_RTX; + + case 's': + return XSTR (in_rtx, idx) == NULL; + + case '0': + switch (GET_CODE (in_rtx)) + { + case JUMP_INSN: + /* JUMP_LABELs are always omitted in compact mode, so treat + any value here as omittable, so that earlier operands can + potentially be omitted also. */ + return m_compact; + + default: + return false; + + } + + default: + return false; + } +} + /* Print IN_RTX onto m_outfile. This is the recursive part of printing. */ void @@ -681,9 +718,18 @@ rtx_writer::print_rtx (const_rtx in_rtx) fprintf (m_outfile, " %d", INSN_UID (in_rtx)); } + /* Determine which is the final operand to print. + In compact mode, skip trailing operands that have the default values + e.g. trailing "(nil)" values. */ + int limit = GET_RTX_LENGTH (GET_CODE (in_rtx)); + if (m_compact) + while (limit > idx && operand_has_default_value_p (in_rtx, limit - 1)) + limit--; + /* Get the format string and skip the first elements if we have handled them already. */ - for (; idx < GET_RTX_LENGTH (GET_CODE (in_rtx)); idx++) + + for (; idx < limit; idx++) print_rtx_operand (in_rtx, idx); switch (GET_CODE (in_rtx)) |