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tree.h: Declare make_decl_rtl_for_debug. 

* tree.h: Declare make_decl_rtl_for_debug.
	* varasm.c (make_decl_rtl_for_debug): New.
	* dwarf2out.c (rtl_for_decl_location): Call it.
	* cfgexpand.c (expand_debug_expr): Call it.

From-SVN: r157551
This commit is contained in:
Aldy Hernandez 2010-03-18 20:41:40 +00:00 committed by Aldy Hernandez
parent 9a05b74924
commit b1aa065584
6 changed files with 50 additions and 6 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2010-03-18 Aldy Hernandez <aldyh@redhat.com>
* tree.h: Declare make_decl_rtl_for_debug.
* varasm.c (make_decl_rtl_for_debug): New.
* dwarf2out.c (rtl_for_decl_location): Call it.
* cfgexpand.c (expand_debug_expr): Call it.
2010-03-18 Jakub Jelinek <jakub@redhat.com>
PR bootstrap/43399

3
gcc/cfgexpand.c
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@ -2339,8 +2339,7 @@ expand_debug_expr (tree exp)
|| mode == VOIDmode)
return NULL;
op0 = DECL_RTL (exp);
SET_DECL_RTL (exp, NULL);
op0 = make_decl_rtl_for_debug (exp);
if (!MEM_P (op0)
|| GET_CODE (XEXP (op0, 0)) != SYMBOL_REF
|| SYMBOL_REF_DECL (XEXP (op0, 0)) != exp)

5
gcc/dwarf2out.c
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@ -15770,10 +15770,7 @@ rtl_for_decl_location (tree decl)
&& !DECL_HARD_REGISTER (decl)
&& DECL_MODE (decl) != VOIDmode)
{
rtl = DECL_RTL (decl);
/* Reset DECL_RTL back, as various parts of the compiler expects
DECL_RTL set meaning it is actually going to be output. */
SET_DECL_RTL (decl, NULL);
rtl = make_decl_rtl_for_debug (decl);
if (!MEM_P (rtl)
|| GET_CODE (XEXP (rtl, 0)) != SYMBOL_REF
|| SYMBOL_REF_DECL (XEXP (rtl, 0)) != decl)

8
gcc/testsuite/gfortran.dg/assign-debug.f90 Normal file
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@ -0,0 +1,8 @@
! { dg-do compile }
! { dg-options "-fcompare-debug -O2" }
program test
integer i
common i
assign 2000 to i ! { dg-warning "Deleted feature: ASSIGN statement" }
2000 continue
end

1
gcc/tree.h
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@ -5131,6 +5131,7 @@ extern unsigned int update_alignment_for_field (record_layout_info, tree,
unsigned int);
/* varasm.c */
extern void make_decl_rtl (tree);
extern rtx make_decl_rtl_for_debug (tree);
extern void make_decl_one_only (tree, tree);
extern int supports_one_only (void);
extern void resolve_unique_section (tree, int, int);

32
gcc/varasm.c
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@ -1476,6 +1476,38 @@ make_decl_rtl (tree decl)
if (flag_mudflap && TREE_CODE (decl) == VAR_DECL)
mudflap_enqueue_decl (decl);
}
/* Like make_decl_rtl, but inhibit creation of new alias sets when
calling make_decl_rtl. Also, reset DECL_RTL before returning the
rtl. */
rtx
make_decl_rtl_for_debug (tree decl)
{
unsigned int save_aliasing_flag;
rtx rtl;
if (DECL_RTL_SET_P (decl))
return DECL_RTL (decl);
/* Kludge alert! Somewhere down the call chain, make_decl_rtl will
call new_alias_set. If running with -fcompare-debug, sometimes
we do not want to create alias sets that will throw the alias
numbers off in the comparison dumps. So... clearing
flag_strict_aliasing will keep new_alias_set() from creating a
new set. */
save_aliasing_flag = flag_strict_aliasing;
flag_strict_aliasing = 0;
rtl = DECL_RTL (decl);
/* Reset DECL_RTL back, as various parts of the compiler expects
DECL_RTL set meaning it is actually going to be output. */
SET_DECL_RTL (decl, NULL);
flag_strict_aliasing = save_aliasing_flag;
return rtl;
}
/* Output a string of literal assembler code
for an `asm' keyword used between functions. */