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| author | Richard Guenther <rguenther@suse.de> | 2005-11-28 10:00:55 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2005-11-28 10:00:55 +0000 |
| commit | bbee4b64682d27f5ea99df3654e3e1b139443e0e (patch) | |
| tree | 218aa8d29f5907f93670f6494b5c844f7b4bd278 /gcc | |
| parent | d531830f5db3d08322202915d9b44572f410841e (diff) | |
| download | gcc-bbee4b64682d27f5ea99df3654e3e1b139443e0e.zip gcc-bbee4b64682d27f5ea99df3654e3e1b139443e0e.tar.gz gcc-bbee4b64682d27f5ea99df3654e3e1b139443e0e.tar.bz2 | |
c-common.c (strict_aliasing_warning): Handle all component-ref like accesses.
2005-11-28 Richard Guenther <rguenther@suse.de>
* c-common.c (strict_aliasing_warning): Handle all
component-ref like accesses.
* gcc.dg/alias-9.c: New testcase.
* g++.dg/warn/Wstrict-aliasing-7.C: Likewise.
From-SVN: r107598
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/c-common.c | 2 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/warn/Wstrict-aliasing-7.C | 20 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/alias-9.c | 20 |
5 files changed, 51 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 52b1880..a1b40fd 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2005-11-28 Richard Guenther <rguenther@suse.de> + + * c-common.c (strict_aliasing_warning): Handle all + component-ref like accesses. + 2005-11-28 Roger Sayle <roger@eyesopen.com> Uros Bizjak <uros@kss-loka.si> diff --git a/gcc/c-common.c b/gcc/c-common.c index 82fe613..b416a5d 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -966,7 +966,7 @@ strict_aliasing_warning(tree otype, tree type, tree expr) && POINTER_TYPE_P (type) && POINTER_TYPE_P (otype) && TREE_CODE (expr) == ADDR_EXPR && (DECL_P (TREE_OPERAND (expr, 0)) - || TREE_CODE (TREE_OPERAND (expr, 0)) == COMPONENT_REF) + || handled_component_p (TREE_OPERAND (expr, 0))) && !VOID_TYPE_P (TREE_TYPE (type))) { /* Casting the address of an object to non void pointer. Warn diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 75ca6e4..7b1a543 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2005-11-28 Richard Guenther <rguenther@suse.de> + + * gcc.dg/alias-9.c: New testcase. + * g++.dg/warn/Wstrict-aliasing-7.C: Likewise. + 2005-11-28 Roger Sayle <roger@eyesopen.com> Uros Bizjak <uros@kss-loka.si> diff --git a/gcc/testsuite/g++.dg/warn/Wstrict-aliasing-7.C b/gcc/testsuite/g++.dg/warn/Wstrict-aliasing-7.C new file mode 100644 index 0000000..5e41808 --- /dev/null +++ b/gcc/testsuite/g++.dg/warn/Wstrict-aliasing-7.C @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* { dg-options "-Wstrict-aliasing -O2" } */ + +int a[2]; + +double *foo1(void) +{ + return (double *)a; /* { dg-warning "strict-aliasing" } */ +} + +double *foo2(void) +{ + return (double *)&a[0]; /* { dg-warning "strict-aliasing" } */ +} + +__complex__ double x; +int *bar(void) +{ + return (int *)&__imag__ x; /* { dg-warning "strict-aliasing" } */ +} diff --git a/gcc/testsuite/gcc.dg/alias-9.c b/gcc/testsuite/gcc.dg/alias-9.c new file mode 100644 index 0000000..6e9d4a8 --- /dev/null +++ b/gcc/testsuite/gcc.dg/alias-9.c @@ -0,0 +1,20 @@ +/* { dg-do compile } */ +/* { dg-options "-Wstrict-aliasing -O2" } */ + +int a[2]; + +double *foo1(void) +{ + return (double *)a; /* { dg-warning "strict-aliasing" } */ +} + +double *foo2(void) +{ + return (double *)&a[0]; /* { dg-warning "strict-aliasing" } */ +} + +_Complex x; +int *bar(void) +{ + return (int *)&__imag x; /* { dg-warning "strict-aliasing" } */ +} |