From a1fe17c9adb2b6093f1ce848a48fb8954c27c595 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault@amd.com>
Date: Tue, 19 Jul 2016 23:16:53 +0000
Subject: AMDGPU: Change fdiv lowering based on !fpmath metadata

If 2.5 ulp is acceptable, denormals are not required, and
isn't a reciprocal which will already be handled, replace
with a faster fdiv.

Simplify the lowering tests by using per function
subtarget features.

llvm-svn: 276051
---
 llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp')

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
index 3e53f52..b2d4e11 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUTargetMachine.cpp
@@ -309,6 +309,7 @@ public:
   ScheduleDAGInstrs *
   createMachineScheduler(MachineSchedContext *C) const override;
 
+  void addIRPasses() override;
   bool addPreISel() override;
   void addMachineSSAOptimization() override;
   bool addInstSelector() override;
@@ -499,6 +500,13 @@ void GCNPassConfig::addMachineSSAOptimization() {
   addPass(&DeadMachineInstructionElimID);
 }
 
+void GCNPassConfig::addIRPasses() {
+  // TODO: May want to move later or split into an early and late one.
+  addPass(createAMDGPUCodeGenPreparePass(&getGCNTargetMachine()));
+
+  AMDGPUPassConfig::addIRPasses();
+}
+
 bool GCNPassConfig::addInstSelector() {
   AMDGPUPassConfig::addInstSelector();
   addPass(createSILowerI1CopiesPass());
-- 
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