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Added debugging utilities debug_rtx_list to print several rtx's and... 

Added debugging utilities debug_rtx_list to print several rtx's and
debug_rtx_find to look up an rtx in a list given a uid.

From-SVN: r3343
This commit is contained in:
Doug Evans 1993-01-26 00:30:34 +00:00
parent 8aa9dc6a81
commit 716f003f91
1 changed files with 58 additions and 0 deletions
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58
gcc/print-rtl.c
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@ -230,6 +230,64 @@ debug_rtx (x)
fprintf (stderr, "\n");
}
/* Count of rtx's to print with debug_rtx_list.
This global exists because gdb user defined commands have no arguments. */
int debug_rtx_count = 0; /* 0 is treated as equivalent to 1 */
/* Call this function to print list from X on.
N is a count of the rtx's to print. Positive values print from the specified
rtx on. Negative values print a window around the rtx.
EG: -5 prints 2 rtx's on either side (in addition to the specified rtx). */
void
debug_rtx_list (x, n)
rtx x;
int n;
{
int i,count;
rtx insn;
count = n == 0 ? 1 : n < 0 ? -n : n;
/* If we are printing a window, back up to the start. */
if (n < 0)
for (i = count / 2; i > 0; i--)
{
if (PREV_INSN (x) == 0)
break;
x = PREV_INSN (x);
}
for (i = count, insn = x; i > 0 && insn != 0; i--, insn = NEXT_INSN (insn))
debug_rtx (insn);
}
/* Call this function to search an rtx list to find one with insn uid UID,
and then call debug_rtx_list to print it, using DEBUG_RTX_COUNT.
The found insn is returned to enable further debugging analysis. */
rtx
debug_rtx_find(x, uid)
rtx x;
int uid;
{
while (x != 0 && INSN_UID (x) != uid)
x = NEXT_INSN (x);
if (x != 0)
{
debug_rtx_list (x, debug_rtx_count);
return x;
}
else
{
fprintf (stderr, "insn uid %d not found\n", uid);
return 0;
}
}
/* External entry point for printing a chain of insns
starting with RTX_FIRST onto file OUTF.
A blank line separates insns.