From 5eaada1e124bc4cc58e687b9b4b06a264380012a Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@gmail.com>
Date: Wed, 8 Feb 2017 05:45:46 +0000
Subject: [PATCH] [X86] Add test for clflushopt intrinsic and only enable it to
 be selected if the feature flag is set.

llvm-svn: 294407
---
 lib/Target/X86/X86InstrInfo.td |  2 ++
 lib/Target/X86/X86Subtarget.h  |  1 +
 test/CodeGen/X86/clflushopt.ll | 13 +++++++++++++
 3 files changed, 16 insertions(+)
 create mode 100644 test/CodeGen/X86/clflushopt.ll

diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index 7087fe9dcd8..7bdf2bd41b1 100644
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -862,6 +862,7 @@ def HasMWAITX    : Predicate<"Subtarget->hasMWAITX()">;
 def FPStackf32   : Predicate<"!Subtarget->hasSSE1()">;
 def FPStackf64   : Predicate<"!Subtarget->hasSSE2()">;
 def HasMPX       : Predicate<"Subtarget->hasMPX()">;
+def HasCLFLUSHOPT : Predicate<"Subtarget->hasCLFLUSHOPT()">;
 def HasCmpxchg16b: Predicate<"Subtarget->hasCmpxchg16b()">;
 def Not64BitMode : Predicate<"!Subtarget->is64Bit()">,
                              AssemblerPredicate<"!Mode64Bit", "Not 64-bit mode">;
@@ -2529,6 +2530,7 @@ let Predicates = [HasTBM] in {
 // Memory Instructions
 //
 
+let Predicates = [HasCLFLUSHOPT] in
 def CLFLUSHOPT : I<0xAE, MRM7m, (outs), (ins i8mem:$src),
                    "clflushopt\t$src", [(int_x86_clflushopt addr:$src)]>, PD;
 def CLWB       : I<0xAE, MRM6m, (outs), (ins i8mem:$src), "clwb\t$src", []>, PD;
diff --git a/lib/Target/X86/X86Subtarget.h b/lib/Target/X86/X86Subtarget.h
index f9ae5a4fc2d..633c7adda2f 100644
--- a/lib/Target/X86/X86Subtarget.h
+++ b/lib/Target/X86/X86Subtarget.h
@@ -487,6 +487,7 @@ public:
   bool hasVLX() const { return HasVLX; }
   bool hasPKU() const { return HasPKU; }
   bool hasMPX() const { return HasMPX; }
+  bool hasCLFLUSHOPT() const { return HasCLFLUSHOPT; }
 
   bool isXRaySupported() const override { return is64Bit(); }
 
diff --git a/test/CodeGen/X86/clflushopt.ll b/test/CodeGen/X86/clflushopt.ll
new file mode 100644
index 00000000000..ee416eb96c5
--- /dev/null
+++ b/test/CodeGen/X86/clflushopt.ll
@@ -0,0 +1,13 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=i686-apple-darwin -mattr=clflushopt | FileCheck %s
+
+define void @clflushopt(i8* %p) nounwind {
+; CHECK-LABEL: clflushopt:
+; CHECK:       ## BB#0:
+; CHECK-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; CHECK-NEXT:    clflushopt (%eax)
+; CHECK-NEXT:    retl
+  tail call void @llvm.x86.clflushopt(i8* %p)
+  ret void
+}
+declare void @llvm.x86.clflushopt(i8*) nounwind