re PR rtl-optimization/11210 (optimizer drops conditional with typecast from signed to unsigned char)
PR optimization/11210 * fold-const (decode_field_reference): Strip only NOPs that don't affect the sign. From-SVN: r68524
This commit is contained in:
parent
fc5eb4a111
commit
6dc208a1ed
|
@ -1,3 +1,9 @@
|
|||
2003-06-26 Eric Botcazou <ebotcazou@libertysurf.fr>
|
||||
|
||||
PR optimization/11210
|
||||
* fold-const (decode_field_reference): Strip only NOPs that
|
||||
don't affect the sign.
|
||||
|
||||
2003-06-26 Dhananjay Deshpande <dhananjayd@kpitcummins.com>
|
||||
|
||||
* gcc/config/sh/sh.md (push_fpscr): Enable for TARGET_SH2E.
|
||||
|
|
|
@ -2742,7 +2742,8 @@ decode_field_reference (exp, pbitsize, pbitpos, pmode, punsignedp,
|
|||
if (! INTEGRAL_TYPE_P (TREE_TYPE (exp)))
|
||||
return 0;
|
||||
|
||||
STRIP_NOPS (exp);
|
||||
/* Signedness matters here. */
|
||||
STRIP_SIGN_NOPS (exp);
|
||||
|
||||
if (TREE_CODE (exp) == BIT_AND_EXPR)
|
||||
{
|
||||
|
|
|
@ -1,3 +1,7 @@
|
|||
2003-06-26 Eric Botcazou <ebotcazou@libertysurf.fr>
|
||||
|
||||
* gcc.dg/20030626-1.c: New test.
|
||||
|
||||
2003-06-26 Neil Booth <neil@daikokuya.co.uk>
|
||||
|
||||
* const-str-2.m: Update.
|
||||
|
|
|
@ -0,0 +1,18 @@
|
|||
/* PR optimization/11210 */
|
||||
/* Originator: Guido Classen <guido@clagi.de> */
|
||||
/* Reduced testcase by Falk Hueffner <falk@debian.org> */
|
||||
/* { dg-do compile } */
|
||||
/* { dg-options "-O" } */
|
||||
|
||||
/* Verify that the constant expressions folder doesn't
|
||||
throw away the cast operation in the comparison. */
|
||||
|
||||
struct str {
|
||||
int head;
|
||||
char data[8];
|
||||
};
|
||||
|
||||
int foo(struct str t)
|
||||
{
|
||||
return t.data[0] || (unsigned char) t.data[2] != 130; /* { dg-bogus "comparison is always 1" } */
|
||||
}
|
Loading…
Reference in New Issue