From a392cd2fde4d0a84bc5871f63b545867e3257d56 Mon Sep 17 00:00:00 2001
From: Lauro Ramos Venancio <lauro.venancio@gmail.com>
Date: Wed, 15 Aug 2007 22:13:27 +0000
Subject: [PATCH] Implement FPOWI ExpandOp. Fix PR1287.

llvm-svn: 41112
---
 llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp |  5 +++++
 llvm/test/CodeGen/ARM/fpowi.ll                | 16 ++++++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 llvm/test/CodeGen/ARM/fpowi.ll

diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
index 3d1b47d3f30b..b25f86f774ce 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
@@ -5604,6 +5604,11 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
   case ISD::FP_ROUND:
     Lo = ExpandLibCall(TLI.getLibcallName(RTLIB::FPROUND_F64_F32),Node,true,Hi);
     break;
+  case ISD::FPOWI:
+    Lo = ExpandLibCall(TLI.getLibcallName((VT == MVT::f32)
+                                          ? RTLIB::POWI_F32 : RTLIB::POWI_F64),
+                       Node, false, Hi);
+    break;
   case ISD::FSQRT:
   case ISD::FSIN:
   case ISD::FCOS: {
diff --git a/llvm/test/CodeGen/ARM/fpowi.ll b/llvm/test/CodeGen/ARM/fpowi.ll
new file mode 100644
index 000000000000..ab09ffff6b36
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/fpowi.ll
@@ -0,0 +1,16 @@
+; RUN: llvm-as < %s | llc -mtriple=arm-linux-gnueabi | grep powidf2
+; PR1287
+
+; ModuleID = '<stdin>'
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64"
+target triple = "arm-linux-gnueabi"
+
+define double @_ZSt3powdi(double %__x, i32 %__i) {
+entry:
+	%tmp3 = call double @llvm.powi.f64( double 0.000000e+00, i32 0 )		; <double> [#uses=1]
+	store double %tmp3, double* null, align 8
+	unreachable
+}
+
+declare double @llvm.powi.f64(double, i32)
+