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jeremybenn |
/* { dg-do link } */
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/* { dg-options "-O2 -fipa-pta -fdump-ipa-pta-details -fdump-tree-fre2" } */
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static int x, y;
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static __attribute__((noinline,noclone)) void
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local (int *p)
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{
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*p = 1;
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}
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static __attribute__((noinline,noclone)) void
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local_address_taken (int *p)
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{
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*p = 1;
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}
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void *anyfn_global;
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/* Even though not referenced in this TU we should have added constraints
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for the initializer. */
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/* { dg-final { scan-ipa-dump "ex = &local_address_taken" "pta" } } */
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void (*ex)(int *) = local_address_taken;
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extern void link_error (void);
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int main()
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{
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void (*anyfn)(int *) = (void (*)(int *))(__SIZE_TYPE__)anyfn_global;
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/* The following should cause local_address_taken to get &x
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as argument, but not local. We shouldn't get &x added to
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arbitrary special sub-vars of local_address_taken though,
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a missed optimization currently.
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As local_address_taken escapes the translation unit its
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argument points-to set needs to include ESCAPED and NONLOCAL.
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We shouldn't get the functions sub-vars in the ESCAPED solution
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though, another missed-optimization. This also causes the functions
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uses to be messed up even further. */
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/* ??? As we don't expand the ESCAPED solution we either get x printed here
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or not based on the phase of the moon. */
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/* { dg-final { scan-ipa-dump "local_address_taken.arg0 = { ESCAPED NONLOCAL y x }" "pta" { xfail *-*-* } } } */
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/* { dg-final { scan-ipa-dump "local_address_taken.clobber = { ESCAPED NONLOCAL y x }" "pta" { xfail *-*-* } } } */
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/* { dg-final { scan-ipa-dump "local_address_taken.use = { }" "pta" { xfail *-*-* } } } */
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/* ??? But make sure x really escaped. */
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/* { dg-final { scan-ipa-dump "ESCAPED = {\[^\n\}\]* x \[^\n\}\]*}" "pta" } } */
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(*anyfn) (&x);
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x = 0;
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local (&y);
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/* Thus we should be able to disambiguate x against the call to local
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and CSE the stored value. */
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if (x != 0)
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link_error ();
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x = 1;
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local_address_taken (&y);
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/* As we are computing flow- and context-insensitive we may not
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CSE the load of x here. */
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/* { dg-final { scan-tree-dump " = x;" "fre2" } } */
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return x;
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}
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/* { dg-final { cleanup-ipa-dump "pta" } } */
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/* { dg-final { cleanup-tree-dump "fre2" } } */
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