Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/projects/llvm-cbe/test/test101.c

@@ -0,0 +1,37 @@
+//===-- CBackend.cpp - Library for converting LLVM code to C ----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===------------------------------------------------------------------------------===//
+//
+// Tests if the CBE will execute a fibonacci numbers example.
+// Credit: http://en.literateprograms.org/Fibonacci_numbers_(C)
+// *TW
+//===------------------------------------------------------------------------------===//
+
+unsigned int fastfib(unsigned int n);
+
+int main(){
+    return fastfib(6) - 2;
+}
+
+unsigned int fastfib(unsigned int n){
+    unsigned int a[3];
+    unsigned int *p=a;
+    unsigned int i;
+
+    for(i=0; i<=n; ++i) {
+        if(i<2) *p=i;
+        else{
+            if(p==a) *p=*(a+1)+*(a+2);
+            else if(p==a+1) *p=*a+*(a+2);
+            else *p=*a+*(a+1);
+        }
+        if(++p>a+2) p=a;
+    }
+    return p==a?*(p+2):*(p-1);
+}
+