/* { dg-do compile } */
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/* { dg-do compile } */
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/* { dg-options "-O2 -fdump-tree-forwprop1 -W -Wall" } */
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/* { dg-options "-O2 -fdump-tree-forwprop1 -W -Wall" } */
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#if (__SIZEOF_INT__ == __SIZEOF_FLOAT__)
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#if (__SIZEOF_INT__ == __SIZEOF_FLOAT__)
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typedef int intflt;
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typedef int intflt;
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#elif (__SIZEOF_LONG__ == __SIZEOF_FLOAT__)
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#elif (__SIZEOF_LONG__ == __SIZEOF_FLOAT__)
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typedef long intflt;
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typedef long intflt;
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#else
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#else
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#error Add target support here for type that will union float size
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#error Add target support here for type that will union float size
|
#endif
|
#endif
|
|
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intflt b;
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intflt b;
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void f(void)
|
void f(void)
|
{
|
{
|
float a;
|
float a;
|
a = 1;
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a = 1;
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b = *(intflt*)&a; /* { dg-warning "aliasing" } */
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b = *(intflt*)&a; /* { dg-warning "aliasing" } */
|
}
|
}
|
|
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/* We should be able to convert the cast to a VCE in forwprop1,
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/* We should be able to convert the cast to a VCE in forwprop1,
|
even if there is an aliasing violation.
|
even if there is an aliasing violation.
|
??? While this would be useful and nice to our users in this
|
??? While this would be useful and nice to our users in this
|
particular situation before doing this transformation we have to
|
particular situation before doing this transformation we have to
|
assure that a is killed by a dominating store via type float for
|
assure that a is killed by a dominating store via type float for
|
it to be valid. Then we might as well handle the situation by
|
it to be valid. Then we might as well handle the situation by
|
value-numbering, removing the load alltogether. */
|
value-numbering, removing the load alltogether. */
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/* { dg-final { scan-tree-dump-times "VIEW_CONVERT_EXPR" 1 "forwprop1" { xfail *-*-* } } } */
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/* { dg-final { scan-tree-dump-times "VIEW_CONVERT_EXPR" 1 "forwprop1" { xfail *-*-* } } } */
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/* { dg-final { cleanup-tree-dump "forwprop1" } } */
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/* { dg-final { cleanup-tree-dump "forwprop1" } } */
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|
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