1 // RUN: %clang_cc1 -emit-llvm -o - %s | not grep readonly
2 // RUN: %clang_cc1 -emit-llvm -o - %s | not grep readnone
3
4 // XFAIL: arm
5
6 // The struct being passed byval means that we cannot mark the
7 // function readnone. Readnone would allow stores to the arg to
8 // be deleted in the caller. We also don't allow readonly since
9 // the callee might write to the byval parameter. The inliner
10 // would have to assume the worse and introduce an explicit
11 // temporary when inlining such a function, which is costly for
12 // the common case in which the byval argument is not written.
13 struct S { int A[1000]; };
f(struct S x)14 int __attribute__ ((const)) f(struct S x) { x.A[1] = 0; return x.A[0]; }
15 int g(struct S x) __attribute__ ((pure));
h(struct S x)16 int h(struct S x) { return g(x); }
17