diff --git a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
--- a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -5087,6 +5087,10 @@
     // PushDeclContext because we don't have a scope.
     Sema::ContextRAII savedContext(*this, Function);
 
+    FPFeaturesStateRAII SavedFPFeatures(*this);
+    CurFPFeatures = FPOptions(getLangOpts());
+    FpPragmaStack.CurrentValue = FPOptionsOverride();
+
     if (addInstantiatedParametersToScope(Function, PatternDecl, Scope,
                                          TemplateArgs))
       return;
diff --git a/clang/test/CodeGen/fp-template.cpp b/clang/test/CodeGen/fp-template.cpp
--- a/clang/test/CodeGen/fp-template.cpp
+++ b/clang/test/CodeGen/fp-template.cpp
@@ -15,4 +15,19 @@
 // CHECK-SAME:  (float noundef %{{.*}}, float noundef %{{.*}}) #[[ATTR01:[0-9]+]]{{.*}} {
 // CHECK:       call float @llvm.experimental.constrained.fadd.f32
 
+namespace PR63542 {
+  template <class Compare> float stable_sort(float x, Compare) {
+    float result = x + x;
+    stable_sort(x, int());
+    return result;
+  }
+  float linkage_wrap() { return stable_sort(0.0, 1); }
+}
+
+// CHECK-LABEL: define {{.*}} float @_ZN7PR6354211stable_sortIiEEffT_(
+// CHECK:         fadd float
+
+// Must be at the end of translation unit.
+#pragma STDC FENV_ACCESS ON
+
 // CHECK: attributes #[[ATTR01]] = { {{.*}}strictfp