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cselib.c (cselib_record_sets): Use IF_THEN_ELSE result in cselib_lookup. 

* cselib.c (cselib_record_sets): Use IF_THEN_ELSE result
	in cselib_lookup.

	* gcc.c-torture/execute/20020129-1.c: New test.

From-SVN: r49333
This commit is contained in:
Jakub Jelinek 2002-01-30 00:15:24 +01:00 committed by Jakub Jelinek
parent 003b9f7872
commit 37060e78fa
4 changed files with 61 additions and 1 deletions
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5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2002-01-29 Jakub Jelinek <jakub@redhat.com>
* cselib.c (cselib_record_sets): Use IF_THEN_ELSE result
in cselib_lookup.
2002-01-29 Aldy Hernandez <aldyh@redhat.com>
* rs6000.md ("*call_value_local32"): Remove constraints.

2
gcc/cselib.c
View File

@ -1238,7 +1238,7 @@ cselib_record_sets (insn)
rtx src = sets[i].src;
if (cond)
src = gen_rtx_IF_THEN_ELSE (GET_MODE (src), cond, src, dest);
sets[i].src_elt = cselib_lookup (sets[i].src, GET_MODE (dest), 1);
sets[i].src_elt = cselib_lookup (src, GET_MODE (dest), 1);
if (GET_CODE (dest) == MEM)
sets[i].dest_addr_elt = cselib_lookup (XEXP (dest, 0), Pmode, 1);
else

4
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2002-01-29 Jakub Jelinek <jakub@redhat.com>
* gcc.c-torture/execute/20020129-1.c: New test.
2002-01-29 Neil Booth <neil@daikokuya.demon.co.uk>
* gcc.c-torture/compile/20000224-1.c: Update.

51
gcc/testsuite/gcc.c-torture/execute/20020129-1.c Normal file
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@ -0,0 +1,51 @@
/* This testcase failed at -O2 on IA-64, because scheduling did not take
into account conditional execution when using cselib for alias
analysis. */
struct D { int d1; struct D *d2; };
struct C { struct D c1; long c2, c3, c4, c5, c6; };
struct A { struct A *a1; struct C *a2; };
struct B { struct C b1; struct A *b2; };
extern void abort (void);
extern void exit (int);
void
foo (struct B *x, struct B *y)
{
if (x->b2 == 0)
{
struct A *a;
x->b2 = a = y->b2;
y->b2 = 0;
for (; a; a = a->a1)
a->a2 = &x->b1;
}
if (y->b2 != 0)
abort ();
if (x->b1.c3 == -1)
{
x->b1.c3 = y->b1.c3;
x->b1.c4 = y->b1.c4;
y->b1.c3 = -1;
y->b1.c4 = 0;
}
if (y->b1.c3 != -1)
abort ();
}
struct B x, y;
int main ()
{
y.b1.c1.d1 = 6;
y.b1.c3 = 145;
y.b1.c4 = 2448;
x.b1.c3 = -1;
foo (&x, &y);
exit (0);
}