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flow.c (propagate_one_insn): Add error message and print out insn for debugging.

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2002-01-15  Eric Christopher  <echristo@redhat.com>

	* flow.c (propagate_one_insn): Add error message and print out
	insn for debugging.

From-SVN: r48878
This commit is contained in:
Eric Christopher 2002-01-15 20:50:22 +00:00 • committed by Eric Christopher
parent 006946e43e
commit 4a913dd6b7
2 changed files with 22 additions and 13 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-01-15 Eric Christopher <echristo@redhat.com>
* flow.c (propagate_one_insn): Add error message and print out
insn for debugging.
2002-01-15 Joseph S. Myers <jsm28@cam.ac.uk>
* system.h (ASM_IDENTIFY_GCC, STDC_VALUE, TRAMPOLINE_ALIGN,

30
gcc/flow.c
View file

@ -1295,8 +1295,8 @@ calculate_global_regs_live (blocks_in, blocks_out, flags)
/* This structure is used to pass parameters to an from the
the function find_regno_partial(). It is used to pass in the
register number we are looking, as well as to return any rtx
the function find_regno_partial(). It is used to pass in the
register number we are looking, as well as to return any rtx
we find. */
typedef struct {
@ -1308,7 +1308,7 @@ typedef struct {
/* Find the rtx for the reg numbers specified in 'data' if it is
part of an expression which only uses part of the register. Return
it in the structure passed in. */
static int
static int
find_regno_partial (ptr, data)
rtx *ptr;
void *data;
@ -1320,7 +1320,7 @@ find_regno_partial (ptr, data)
if (*ptr == NULL_RTX)
return 0;
switch (GET_CODE (*ptr))
switch (GET_CODE (*ptr))
{
case ZERO_EXTRACT:
case SIGN_EXTRACT:
@ -1333,7 +1333,7 @@ find_regno_partial (ptr, data)
break;
case SUBREG:
if (GET_CODE (SUBREG_REG (*ptr)) == REG
if (GET_CODE (SUBREG_REG (*ptr)) == REG
&& REGNO (SUBREG_REG (*ptr)) == reg)
{
param->retval = SUBREG_REG (*ptr);
@ -1349,14 +1349,14 @@ find_regno_partial (ptr, data)
}
/* Process all immediate successors of the entry block looking for pseudo
registers which are live on entry. Find all of those whose first
instance is a partial register reference of some kind, and initialize
registers which are live on entry. Find all of those whose first
instance is a partial register reference of some kind, and initialize
them to 0 after the entry block. This will prevent bit sets within
registers whose value is unknown, and may contain some kind of sticky
registers whose value is unknown, and may contain some kind of sticky
bits we don't want. */
int
initialize_uninitialized_subregs ()
initialize_uninitialized_subregs ()
{
rtx insn;
edge e;
@ -1375,7 +1375,7 @@ initialize_uninitialized_subregs ()
/* Find an insn which mentions the register we are looking for.
Its preferable to have an instance of the register's rtl since
there may be various flags set which we need to duplicate.
there may be various flags set which we need to duplicate.
If we can't find it, its probably an automatic whose initial
value doesn't matter, or hopefully something we don't care about. */
for (i = get_insns (); i && INSN_UID (i) != uid; i = NEXT_INSN (i))
@ -1387,7 +1387,7 @@ initialize_uninitialized_subregs ()
for_each_rtx (&i, find_regno_partial, &param);
if (param.retval != NULL_RTX)
{
insn = gen_move_insn (param.retval,
insn = gen_move_insn (param.retval,
CONST0_RTX (GET_MODE (param.retval)));
insert_insn_on_edge (insn, e);
did_something = 1;
@ -1566,7 +1566,11 @@ propagate_one_insn (pbi, insn)
|| (HAVE_sibcall_epilogue
&& sibcall_epilogue_contains (insn)))
&& find_reg_note (insn, REG_MAYBE_DEAD, NULL_RTX) == 0)
abort ();
{
internal_error ("Attempt to delete prologue/epilogue insn:\n");
debug_rtx (insn);
abort ();
}
/* Record sets. Do this even for dead instructions, since they
would have killed the values if they hadn't been deleted. */
@ -2010,7 +2014,7 @@ insn_dead_p (pbi, x, call_ok, notes)
if (REG_NOTE_KIND (notes) == REG_INC)
{
int regno = REGNO (XEXP (notes, 0));
/* Don't delete insns to set global regs. */
if ((regno < FIRST_PSEUDO_REGISTER && global_regs[regno])
|| REGNO_REG_SET_P (pbi->reg_live, regno))