1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s | FileCheck %s
2
3 // XFAIL: mips
4
5 // It could hit in @llvm.memcpy with "-triple x86_64-(mingw32|win32)".
6 // CHECK-NOT: readonly
7 // CHECK-NOT: readnone
8
9 // The struct being passed byval means that we cannot mark the
10 // function readnone. Readnone would allow stores to the arg to
11 // be deleted in the caller. We also don't allow readonly since
12 // the callee might write to the byval parameter. The inliner
13 // would have to assume the worse and introduce an explicit
14 // temporary when inlining such a function, which is costly for
15 // the common case in which the byval argument is not written.
16 struct S { int A[1000]; };
f(struct S x)17 int __attribute__ ((const)) f(struct S x) { x.A[1] = 0; return x.A[0]; }
18 int g(struct S x) __attribute__ ((pure));
h(struct S x)19 int h(struct S x) { return g(x); }
20