Start to add the LLVM builtins 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

Resubmit this patch. The target triple needs to be added to the test so that 
clang does not tell the backend the wrong target when the host is BSD. There
is a clang bug in here somewhere that I need to track down. At Mips this
has been filed internally as a bug.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189186 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 29 insertions, 1 deletions

diff --git a/lib/Target/Mips/Mips16HardFloat.cpp b/lib/Target/Mips/Mips16HardFloat.cpp
index 46b04c3..617c178 100644
--- a/lib/Target/Mips/Mips16HardFloat.cpp
+++ b/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(
diff --git a/test/CodeGen/Mips/powif64_16.ll b/test/CodeGen/Mips/powif64_16.ll
new file mode 100644
index 0000000..8431f31
--- /dev/null
+++ b/test/CodeGen/Mips/powif64_16.ll
@@ -0,0 +1,28 @@
+; RUN: llc -mtriple=mipsel-linux-gnu -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}