Start to add the builtind to the mips16 exclusion lists for fp.

I need to add the rest of these to the list or else to delay putting
out the actual stub until later in code generation when I know if
the external function ever got emitted.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189161 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/Mips16HardFloat.cpp

@@ -325,7 +325,7 @@ static void assureFPCallStub(Function &F, Module *M,
 // Functions that are inline intrinsics don't need helpers.
 //
 static const char *IntrinsicInline[] =
-  {"fabs"};
+  {"fabs", "llvm.powi.f64"};
 
 static bool isIntrinsicInline(Function *F) {
   return std::binary_search(

test/CodeGen/Mips/powif64_16.ll

@@ -0,0 +1,28 @@
+; RUN: llc -march=mipsel -mcpu=mips16 -mips16-hard-float -soft-float -relocation-model=static < %s | FileCheck %s 
+
+@x = global double 4.500000e+00, align 8
+@i = global i32 4, align 4
+@y = common global double 0.000000e+00, align 8
+
+; Function Attrs: nounwind optsize
+define i32 @main() #0 {
+entry:
+  %0 = load double* @x, align 8, !tbaa !0
+  %1 = load i32* @i, align 4, !tbaa !3
+  %2 = tail call double @llvm.powi.f64(double %0, i32 %1)
+; CHECK-NOT: .ent	__call_stub_fp_llvm.powi.f64
+; CHECK-NOT: {{.*}} jal llvm.powi.f64 
+  store double %2, double* @y, align 8, !tbaa !0
+  ret i32 0
+}
+
+; Function Attrs: nounwind readonly
+declare double @llvm.powi.f64(double, i32) #1
+
+attributes #0 = { nounwind optsize "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf"="true" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="true" }
+attributes #1 = { nounwind readonly }
+
+!0 = metadata !{metadata !"double", metadata !1}
+!1 = metadata !{metadata !"omnipotent char", metadata !2}
+!2 = metadata !{metadata !"Simple C/C++ TBAA"}
+!3 = metadata !{metadata !"int", metadata !1}