From b34d3aa35b199969168f41a12e92e5d2f0e9367f Mon Sep 17 00:00:00 2001
From: Peter Collingbourne <peter@pcc.me.uk>
Date: Mon, 28 May 2012 21:48:37 +0000
Subject: [PATCH] Add llvm.fabs intrinsic.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157594 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Intrinsics.td                    |  1 +
 .../SelectionDAG/SelectionDAGBuilder.cpp      |  5 +++++
 test/CodeGen/NVPTX/intrinsics.ll              | 21 +++++++++++++++++++
 3 files changed, 27 insertions(+)
 create mode 100644 test/CodeGen/NVPTX/intrinsics.ll

diff --git a/include/llvm/Intrinsics.td b/include/llvm/Intrinsics.td
index 1ebf13b1d81..01d2cca47a6 100644
--- a/include/llvm/Intrinsics.td
+++ b/include/llvm/Intrinsics.td
@@ -259,6 +259,7 @@ let Properties = [IntrReadMem] in {
   def int_log2 : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
   def int_exp  : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
   def int_exp2 : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
+  def int_fabs : Intrinsic<[llvm_anyfloat_ty], [LLVMMatchType<0>]>;
 }
 
 let Properties = [IntrNoMem] in {
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 83df110d73f..b7a6ec23d6e 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -4920,6 +4920,11 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
   case Intrinsic::pow:
     visitPow(I);
     return 0;
+  case Intrinsic::fabs:
+    setValue(&I, DAG.getNode(ISD::FABS, dl,
+                             getValue(I.getArgOperand(0)).getValueType(),
+                             getValue(I.getArgOperand(0))));
+    return 0;
   case Intrinsic::fma:
     setValue(&I, DAG.getNode(ISD::FMA, dl,
                              getValue(I.getArgOperand(0)).getValueType(),
diff --git a/test/CodeGen/NVPTX/intrinsics.ll b/test/CodeGen/NVPTX/intrinsics.ll
new file mode 100644
index 00000000000..afab60ca96a
--- /dev/null
+++ b/test/CodeGen/NVPTX/intrinsics.ll
@@ -0,0 +1,21 @@
+; RUN: llc < %s -march=nvptx -mcpu=sm_10 | FileCheck %s
+; RUN: llc < %s -march=nvptx64 -mcpu=sm_10 | FileCheck %s
+; RUN: llc < %s -march=nvptx -mcpu=sm_20 | FileCheck %s
+; RUN: llc < %s -march=nvptx64 -mcpu=sm_20 | FileCheck %s
+
+define ptx_device float @test_fabsf(float %f) {
+; CHECK: abs.f32 %f0, %f0;
+; CHECK: ret;
+	%x = call float @llvm.fabs.f32(float %f)
+	ret float %x
+}
+
+define ptx_device double @test_fabs(double %d) {
+; CHECK: abs.f64 %fl0, %fl0;
+; CHECK: ret;
+	%x = call double @llvm.fabs.f64(double %d)
+	ret double %x
+}
+
+declare float @llvm.fabs.f32(float)
+declare double @llvm.fabs.f64(double)
-- 
2.34.1