testcase that doesn't work quite yet

llvm-svn: 41478

clang/test/CodeGen/mandel.c

@@ -0,0 +1,73 @@
+// RUN: clang -emit-llvm %s
+
+/* Sparc is not C99-compliant */
+#if defined(sparc) || defined(__sparc__) || defined(__sparcv9)
+
+int main() { return 0; }
+
+#else /* sparc */
+
+#define ESCAPE 2
+#define IMAGE_WIDTH 150
+#define IMAGE_HEIGHT 50
+#if 1
+#define IMAGE_SIZE 60
+#else
+#define IMAGE_SIZE 5000
+#endif
+#define START_X -2.1
+#define END_X 1.0
+#define START_Y -1.25
+#define MAX_ITER 100
+
+#define step_X ((END_X - START_X)/IMAGE_WIDTH)
+#define step_Y ((-START_Y - START_Y)/IMAGE_HEIGHT)
+
+#define I 1.0iF
+
+#if defined(__FreeBSD__) || defined(__OpenBSD__)
+#include <complex.h>
+#elif defined(__APPLE__)
+#include <math.h>
+#else
+#include <tgmath.h>
+#endif
+
+#include <stdio.h>
+
+volatile double __complex__ accum;
+
+void mandel() {
+  int x, y, n;
+  for (y = 0; y < IMAGE_HEIGHT; ++y) {
+    for (x = 0; x < IMAGE_WIDTH; ++x) {
+      double __complex__ c = (START_X+x*step_X) + (START_Y+y*step_Y) * I;
+      double __complex__ z = 0.0;
+
+      for (n = 0; n < MAX_ITER; ++n) {
+        z = z * z + c;
+        if (hypot(__real__ z, __imag__ z) >= ESCAPE)
+          break;
+      }
+
+      if (n == MAX_ITER)
+        putchar(' ');
+      else if (n > 6)
+        putchar('.');
+      else if (n > 3)
+        putchar('+');
+      else if (n > 2)
+        putchar('x');
+      else
+        putchar('*');
+    }
+    putchar('\n');
+  }
+}
+
+int main() {
+  mandel();
+  return 0;
+}
+
+#endif /* sparc */