llvm-project/clang/test/Sema/usual-float.c

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// RUN: clang-cc %s -fsyntax-only
typedef float CGFloat;
extern void func(CGFloat);
void foo(int dir, int n, int tindex) {
const float PI = 3.142;
CGFloat cgf = 3.4;
float ang = (float) tindex * (-dir*2.0f*PI/n);
func((CGFloat)cgf/65535.0f);
}