Add support of RTM from TSX extension

- Add RTM code generation support throught 3 X86 intrinsics:
  xbegin()/xend() to start/end a transaction region, and xabort() to abort a
  tranaction region



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167573 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 30 insertions, 0 deletions

diff --git a/test/CodeGen/X86/rtm.ll b/test/CodeGen/X86/rtm.ll
new file mode 100644
index 0000000..76eb951
--- /dev/null
+++ b/test/CodeGen/X86/rtm.ll
@@ -0,0 +1,30 @@
+; RUN: llc < %s -mattr=+rtm -mtriple=x86_64-unknown-unknown | FileCheck %s
+
+declare i32 @llvm.x86.xbegin() nounwind
+declare void @llvm.x86.xend() nounwind
+declare void @llvm.x86.xabort(i8) noreturn nounwind
+
+define i32 @test_xbegin() nounwind uwtable {
+entry:
+  %0 = tail call i32 @llvm.x86.xbegin() nounwind
+  ret i32 %0
+; CHECK: test_xbegin
+; CHECK: xbegin [[LABEL:.*BB.*]]
+; CHECK: [[LABEL]]:
+}
+
+define void @test_xend() nounwind uwtable {
+entry:
+  tail call void @llvm.x86.xend() nounwind
+  ret void
+; CHECK: test_xend
+; CHECK: xend
+}
+
+define void @test_xabort() nounwind uwtable {
+entry:
+  tail call void @llvm.x86.xabort(i8 2)
+  unreachable
+; CHECK: test_xabort
+; CHECK: xabort $2
+}