Added test cases for -Wfloat-equal to test comparisons against literals that can be

represented exactly and inexactly by APFloats. For the former, we do not emit a
warning.

llvm-svn: 44425

clang/test/Sema/floating-point-compare.c

@@ -1,21 +1,29 @@
 // RUN: clang -fsyntax-only -Wfloat-equal -verify %s
 
-int foo(float x, float y) {
+int f1(float x, float y) {
   return x == y; // expected-warning {{comparing floating point with ==}}
 } 
 
-int bar(float x, float y) {
+int f2(float x, float y) {
   return x != y; // expected-warning {{comparing floating point with ==}}
 }
 
-int qux(float x) {
+int f3(float x) {
   return x == x; // no-warning
 }
 
-int baz(float x) {
+int f4(float x) {
 	return x == 0.0; // expected-warning {{comparing}}
 }
 
-int taz(float x) {
+int f5(float x) {
 	return x == __builtin_inf(); // no-warning
 }
+
+int f6(float x) {
+  return x == 0.0; // no-warning
+}
+
+int f7(float x) {
+  return x == 3.14159; // expected-warning {{comparing}}
+}