Viewing file:  ipa-pta-13.c (2.13 KB) -rw-r--r--
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/* { dg-do link } */
/* { dg-options "-O2 -fipa-pta -fdump-ipa-pta2-details -fdump-tree-fre3 -fno-ipa-icf -fno-ipa-modref" } */
static int x, y;
static __attribute__((noinline,noclone)) void
local (int *p)
{
*p = 1;
}
static __attribute__((noinline,noclone)) void
local_address_taken (int *p)
{
*p = 1;
}
void *anyfn_global;
/* Even though not referenced in this TU we should have added constraints
for the initializer. */
/* { dg-final { scan-ipa-dump "ex = &local_address_taken" "pta2" } } */
void (*ex)(int *) = local_address_taken;
extern void link_error (void);
int main()
{
void (*anyfn)(int *) = (void (*)(int *))(__SIZE_TYPE__)anyfn_global;
/* The following should cause local_address_taken to get &x
as argument, but not local. We shouldn't get &x added to
arbitrary special sub-vars of local_address_taken though,
a missed optimization currently.
As local_address_taken escapes the translation unit its
argument points-to set needs to include ESCAPED and NONLOCAL.
We shouldn't get the functions sub-vars in the ESCAPED solution
though, another missed-optimization. This also causes the functions
uses to be messed up even further. */
/* ??? As we don't expand the ESCAPED solution we either get x printed here
or not based on the phase of the moon. */
/* { dg-final { scan-ipa-dump "local_address_taken.arg0 = { ESCAPED NONLOCAL y x }" "pta2" { xfail *-*-* } } } */
/* { dg-final { scan-ipa-dump "local_address_taken.clobber = { ESCAPED NONLOCAL y x }" "pta2" { xfail *-*-* } } } */
/* { dg-final { scan-ipa-dump "local_address_taken.use = { }" "pta2" { xfail *-*-* } } } */
/* ??? But make sure x really escaped. */
/* { dg-final { scan-ipa-dump "ESCAPED = {\[^\n\}\]* x \[^\n\}\]*}" "pta2" } } */
(*anyfn) (&x);
x = 0;
local (&y);
/* Thus we should be able to disambiguate x against the call to local
and CSE the stored value. */
if (x != 0)
link_error ();
x = 1;
local_address_taken (&y);
/* As we are computing flow- and context-insensitive we may not
CSE the load of x here. */
/* { dg-final { scan-tree-dump " = x;" "fre3" } } */
return x;
}
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