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Fix accounting of offsets in unadjusted_ptr_and_unit_offset

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unadjusted_ptr_and_unit_offset accidentally throws away the offset computed by
get_addr_base_and_unit_offset. Instead of passing extra_offset it passes offset.

	PR ipa/114207

gcc/ChangeLog:

	* ipa-prop.cc (unadjusted_ptr_and_unit_offset): Fix accounting of offsets in ADDR_EXPR.

gcc/testsuite/ChangeLog:

	* gcc.c-torture/execute/pr114207.c: New test.
This commit is contained in:
Jan Hubicka 2024-07-22 18:05:26 +02:00
parent 0d19fbc7b0
commit 391f46f10b
2 changed files with 25 additions and 2 deletions
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4
gcc/ipa-prop.cc
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@ -1370,9 +1370,9 @@ unadjusted_ptr_and_unit_offset (tree op, tree *ret, poly_int64 *offset_ret)
{
if (TREE_CODE (op) == ADDR_EXPR)
{
poly_int64 extra_offset = 0;
poly_int64 extra_offset;
tree base = get_addr_base_and_unit_offset (TREE_OPERAND (op, 0),
&offset);
&extra_offset);
if (!base)
{
base = get_base_address (TREE_OPERAND (op, 0));

23
gcc/testsuite/gcc.c-torture/execute/pr114207.c Normal file
View File

@ -0,0 +1,23 @@
#include <stdio.h>
#include <stdint.h>
struct S {
int a, b;
};
__attribute__((noinline))
void foo (struct S *s) {
struct S ss = (struct S) {
.a = s->b,
.b = s->a
};
*s = ss;
}
int main() {
struct S s = {6, 12};
foo(&s);
if (s.a != 12 || s.b != 6)
__builtin_abort ();
return 0;
}