1 // RUN: %llvmgcc -O3 -S -o - %s | not grep readonly
2 // RUN: %llvmgcc -O3 -S -o - %s | not grep readnone
3
4
5 // The struct being passed byval means that we cannot mark the
6 // function readnone. Readnone would allow stores to the arg to
7 // be deleted in the caller. We also don't allow readonly since
8 // the callee might write to the byval parameter. The inliner
9 // would have to assume the worse and introduce an explicit
10 // temporary when inlining such a function, which is costly for
11 // the common case in which the byval argument is not written.
12 struct S { int A[1000]; };
f(struct S x)13 int __attribute__ ((const)) f(struct S x) { x.A[1] = 0; return x.A[0]; }
14 int g(struct S x) __attribute__ ((pure));
h(struct S x)15 int h(struct S x) { return g(x); }
16