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re PR middle-end/37815 (ICE in vt_add_function_parameters (bootstrap error)) 

PR 37815
        * emit-rtl.c (get_spill_slot_decl): Export.
        * emit-rtl.h (get_spill_slot_decl): Declare.
        * var-tracking.c (vt_add_function_parameters): Relax assertion
        on the contents of MEM_EXPR in a PARM_DECL to include a spill slot.

From-SVN: r141278
This commit is contained in:
Richard Henderson 2008-10-21 13:48:16 -07:00 committed by Richard Henderson
parent 86b9515c41
commit 3d7e23f61d
4 changed files with 23 additions and 5 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2008-10-21 Richard Henderson <rth@redhat.com>
PR 37815
* emit-rtl.c (get_spill_slot_decl): Export.
* emit-rtl.h (get_spill_slot_decl): Declare.
* var-tracking.c (vt_add_function_parameters): Relax assertion
on the contents of MEM_EXPR in a PARM_DECL to include a spill slot.
2008-10-21 Bob Wilson <bob.wilson@acm.org>
* var-tracking.c (insn_stack_adjust_offset_pre_post): If insn has a

8
gcc/emit-rtl.c
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@ -2141,13 +2141,13 @@ widen_memory_access (rtx memref, enum machine_mode mode, HOST_WIDE_INT offset)
/* A fake decl that is used as the MEM_EXPR of spill slots. */
static GTY(()) tree spill_slot_decl;
static tree
get_spill_slot_decl (void)
tree
get_spill_slot_decl (bool force_build_p)
{
tree d = spill_slot_decl;
rtx rd;
if (d)
if (d || !force_build_p)
return d;
d = build_decl (VAR_DECL, get_identifier ("%sfp"), void_type_node);
@ -2179,7 +2179,7 @@ set_mem_attrs_for_spill (rtx mem)
rtx addr, offset;
tree expr;
expr = get_spill_slot_decl ();
expr = get_spill_slot_decl (true);
alias = MEM_ALIAS_SET (DECL_RTL (expr));
/* We expect the incoming memory to be of the form:

1
gcc/emit-rtl.h
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@ -37,6 +37,7 @@ extern void set_mem_size (rtx, rtx);
/* Set the attributes for MEM appropriate for a spill slot. */
extern void set_mem_attrs_for_spill (rtx);
extern tree get_spill_slot_decl (bool);
/* Return a memory reference like MEMREF, but with its address changed to
ADDR. The caller is asserting that the actual piece of memory pointed

11
gcc/var-tracking.c
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@ -3182,7 +3182,16 @@ vt_add_function_parameters (void)
if (!decl)
continue;
gcc_assert (parm == decl);
if (parm != decl)
{
/* Assume that DECL_RTL was a pseudo that got spilled to
memory. The spill slot sharing code will force the
memory to reference spill_slot_decl (%sfp), so we don't
match above. That's ok, the pseudo must have referenced
the entire parameter, so just reset OFFSET. */
gcc_assert (decl == get_spill_slot_decl (false));
offset = 0;
}
if (!track_loc_p (incoming, parm, offset, false, &mode, &offset))
continue;