1// llvm-gcc -O1+ should run simplify libcalls, O0 shouldn't
2// and -fno-builtins shouldn't.
3// -fno-math-errno should emit an llvm intrinsic, -fmath-errno should not.
4// RUN: %clang_cc1 %s -emit-llvm -fno-math-errno -o - | grep {call.*exp2\\.f64}
5// RUN: %clang_cc1 %s -emit-llvm -fmath-errno -o - | grep {call.*exp2}
6// RUN: %clang_cc1 %s -emit-llvm -O1 -o - | grep {call.*ldexp}
7// RUN: %clang_cc1 %s -emit-llvm -O3 -fno-builtin -o - | grep {call.*exp2}
8
9// clang doesn't support this yet.
10// XFAIL: *
11
12double exp2(double);
13
14double t4(unsigned char x) {
15  return exp2(x);
16}
17