From 116163ab213d2625d2b6f3e896472c6a386c1c55 Mon Sep 17 00:00:00 2001
From: Dale Johannesen <dalej@apple.com>
Date: Fri, 5 Sep 2008 18:38:42 +0000
Subject: [PATCH] Add hooks for other intrinsics to get low-precision
 expansions.

llvm-svn: 55845
---
 .../SelectionDAG/SelectionDAGBuild.cpp        | 68 +++++++++++++++----
 lib/CodeGen/SelectionDAG/SelectionDAGBuild.h  |  4 ++
 2 files changed, 60 insertions(+), 12 deletions(-)

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index e7838e4b5c0..c7e2cd5caba 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -2753,6 +2753,58 @@ SelectionDAGLowering::implVisitBinaryAtomic(CallInst& I, ISD::NodeType Op) {
   return 0;
 }
 
+/// visitExp - lower an exp intrinsic.  Handles the special sequences
+/// for limited-precision mode.
+
+void
+SelectionDAGLowering::visitExp(CallInst &I) {
+  SDValue result;
+  // No special expansion.
+  result = DAG.getNode(ISD::FEXP,
+                       getValue(I.getOperand(1)).getValueType(),
+                       getValue(I.getOperand(1)));
+  setValue(&I, result);
+}
+
+/// visitLog - lower a log intrinsic.  Handles the special sequences
+/// for limited-precision mode.
+
+void
+SelectionDAGLowering::visitLog(CallInst &I) {
+  SDValue result;
+  // No special expansion.
+  result = DAG.getNode(ISD::FLOG,
+                       getValue(I.getOperand(1)).getValueType(),
+                       getValue(I.getOperand(1)));
+  setValue(&I, result);
+}
+
+/// visitLog2 - lower a log2 intrinsic.  Handles the special sequences
+/// for limited-precision mode.
+
+void
+SelectionDAGLowering::visitLog2(CallInst &I) {
+  SDValue result;
+  // No special expansion.
+  result = DAG.getNode(ISD::FLOG2,
+                       getValue(I.getOperand(1)).getValueType(),
+                       getValue(I.getOperand(1)));
+  setValue(&I, result);
+}
+
+/// visitLog10 - lower a log10 intrinsic.  Handles the special sequences
+/// for limited-precision mode.
+
+void
+SelectionDAGLowering::visitLog10(CallInst &I) {
+  SDValue result;
+  // No special expansion.
+  result = DAG.getNode(ISD::FLOG10,
+                       getValue(I.getOperand(1)).getValueType(),
+                       getValue(I.getOperand(1)));
+  setValue(&I, result);
+}
+
 /// visitExp2 - lower an exp2 intrinsic.  Handles the special sequences
 /// for limited-precision mode.
 
@@ -3071,24 +3123,16 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
                              getValue(I.getOperand(1))));
     return 0;
   case Intrinsic::log:
-    setValue(&I, DAG.getNode(ISD::FLOG,
-                             getValue(I.getOperand(1)).getValueType(),
-                             getValue(I.getOperand(1))));
+    visitLog(I);
     return 0;
   case Intrinsic::log2:
-    setValue(&I, DAG.getNode(ISD::FLOG2,
-                             getValue(I.getOperand(1)).getValueType(),
-                             getValue(I.getOperand(1))));
+    visitLog2(I);
     return 0;
   case Intrinsic::log10:
-    setValue(&I, DAG.getNode(ISD::FLOG10,
-                             getValue(I.getOperand(1)).getValueType(),
-                             getValue(I.getOperand(1))));
+    visitLog10(I);
     return 0;
   case Intrinsic::exp:
-    setValue(&I, DAG.getNode(ISD::FEXP,
-                             getValue(I.getOperand(1)).getValueType(),
-                             getValue(I.getOperand(1))));
+    visitExp(I);
     return 0;
   case Intrinsic::exp2:
     visitExp2(I);
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
index 8e7d86329be..72c1bf344b2 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
@@ -506,6 +506,10 @@ private:
   void visitTargetIntrinsic(CallInst &I, unsigned Intrinsic);
 
   void visitExp2(CallInst &I);
+  void visitExp(CallInst &I);
+  void visitLog(CallInst &I);
+  void visitLog2(CallInst &I);
+  void visitLog10(CallInst &I);
 
   void visitVAStart(CallInst &I);
   void visitVAArg(VAArgInst &I);