diff --git a/gcc/d/decl.cc b/gcc/d/decl.cc
index 2bece96f26e46f6e3b9ce121017babb93cc49ca5..990ac4016b884190bb364402e7ee1d2dc1d14327 100644
--- a/gcc/d/decl.cc
+++ b/gcc/d/decl.cc
@@ -829,8 +829,12 @@ public:
     /* Ensure all semantic passes have run.  */
     if (d->semanticRun < PASS::semantic3)
       {
+	gcc_assert (!doing_semantic_analysis_p);
+
+	doing_semantic_analysis_p = true;
 	d->functionSemantic3 ();
 	Module::runDeferredSemantic3 ();
+	doing_semantic_analysis_p = false;
       }
 
     if (global.errors)
diff --git a/gcc/testsuite/gdc.dg/ctfeintrinsics.d b/gcc/testsuite/gdc.dg/ctfeintrinsics.d
new file mode 100644
index 0000000000000000000000000000000000000000..0e5592b9b1a171949762b59f0dd121644fb6b8a7
--- /dev/null
+++ b/gcc/testsuite/gdc.dg/ctfeintrinsics.d
@@ -0,0 +1,53 @@
+// { dg-do compile { target d_runtime_has_std_library } }
+
+//////////////////////////////////////////////////////
+// std.math.exponential
+import std.math.exponential;
+
+enum test_exp = exp(1.0L);
+enum test_expm1 = expm1(1.0L);
+enum test_exp2 = exp2(1.0L);
+enum test_log = log(1.0L);
+enum test_log2 = log2(1.0L);
+enum test_log10 = log10(1.0L);
+enum test_pow = pow(1.0L, 1L);
+enum test_powi = pow(1L, 1L);
+enum test_powf = pow(1L, 1.0L);
+enum test_powl = pow(1.0L, 1.0L);
+
+//////////////////////////////////////////////////////
+// std.math.operations
+import std.math.operations;
+
+enum test_fmin = fmin(1.0L, 2.0L);
+enum test_fmax = fmax(1.0L, 2.0L);
+enum test_fma = fma(1.0L, 2.0L, 3.0L);
+
+//////////////////////////////////////////////////////
+// std.math.rounding
+import std.math.rounding;
+
+enum test_round = round(12.34L);
+enum test_floorf = floor(12.34f);
+enum test_floor = floor(12.34);
+enum test_floorl = floor(12.34L);
+enum test_ceilf = ceil(12.34f);
+enum test_ceil = ceil(12.34);
+enum test_ceill = ceil(12.34L);
+enum test_trunc = trunc(12.34L);
+
+//////////////////////////////////////////////////////
+// std.math.traits
+import std.math.traits;
+
+enum test_isNaN = isNaN(real.nan);
+enum test_isInfinity = isInfinity(real.infinity);
+enum test_isFinite = isFinite(1.0L);
+enum test_copysign = copysign(1.0L, -1.0L);
+enum test_copysigni = copysign(1L, -1.0L);
+
+//////////////////////////////////////////////////////
+// std.math.trigonometry
+import std.math.trigonometry;
+
+enum test_tan = tan(1.0L);