1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/opt/float1.C b/gcc/testsuite/g++.dg/opt/float1.C
new file mode 100644
index 00000000000..8f26ed5c852
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/float1.C
@@ -0,0 +1,21 @@
+// PR optimization/11637
+// Origin: <nick@ilm.com>
+
+// This used to fail to assemble on x86 because a decimal
+// floating point litteral was emitted, which originated
+// from a bogus REG_EQUAL note not removed by the combiner.
+
+// { dg-do assemble }
+// { dg-options "-O2 -fnon-call-exceptions" }
+
+void f(long int seed);
+
+void g(float &o)
+{
+  float a = 0.05f;
+  float b = 1.0 - a;
+  float c = 1.0 + a;
+
+  f(0);
+  o = a;
+}