From 2282afa6cc58f27827bad2e54cb0d516ce400a60 Mon Sep 17 00:00:00 2001
From: Yi Kong <Yi.Kong@arm.com>
Date: Tue, 26 Aug 2014 12:47:26 +0000
Subject: [PATCH] ARM: Add patterns for dbg

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216451 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/IR/IntrinsicsARM.td |  1 +
 lib/Target/ARM/ARMInstrInfo.td   |  2 +-
 lib/Target/ARM/ARMInstrThumb2.td |  3 ++-
 test/CodeGen/ARM/dbg.ll          | 13 +++++++++++++
 4 files changed, 17 insertions(+), 2 deletions(-)
 create mode 100644 test/CodeGen/ARM/dbg.ll

diff --git a/include/llvm/IR/IntrinsicsARM.td b/include/llvm/IR/IntrinsicsARM.td
index 22282874409..60806ff724e 100644
--- a/include/llvm/IR/IntrinsicsARM.td
+++ b/include/llvm/IR/IntrinsicsARM.td
@@ -132,6 +132,7 @@ def int_arm_crc32cw : Intrinsic<[llvm_i32_ty], [llvm_i32_ty, llvm_i32_ty],
 // HINT
 
 def int_arm_hint : Intrinsic<[], [llvm_i32_ty]>;
+def int_arm_dbg : Intrinsic<[], [llvm_i32_ty]>;
 
 //===----------------------------------------------------------------------===//
 // RBIT
diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index f56b682b03d..07f608c1c5b 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -1966,7 +1966,7 @@ def SETEND : AXI<(outs), (ins setend_op:$end), MiscFrm, NoItinerary,
 }
 
 def DBG : AI<(outs), (ins imm0_15:$opt), MiscFrm, NoItinerary, "dbg", "\t$opt",
-             []>, Requires<[IsARM, HasV7]> {
+             [(int_arm_dbg imm0_15:$opt)]>, Requires<[IsARM, HasV7]> {
   bits<4> opt;
   let Inst{27-4} = 0b001100100000111100001111;
   let Inst{3-0} = opt;
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index e6d17e88755..fef8413f94e 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -3720,7 +3720,8 @@ def : t2InstAlias<"sevl$p.w", (t2HINT 5, pred:$p)> {
   let Predicates = [IsThumb2, HasV8];
 }
 
-def t2DBG : T2I<(outs), (ins imm0_15:$opt), NoItinerary, "dbg", "\t$opt", []> {
+def t2DBG : T2I<(outs), (ins imm0_15:$opt), NoItinerary, "dbg", "\t$opt",
+                [(int_arm_dbg imm0_15:$opt)]> {
   bits<4> opt;
   let Inst{31-20} = 0b111100111010;
   let Inst{19-16} = 0b1111;
diff --git a/test/CodeGen/ARM/dbg.ll b/test/CodeGen/ARM/dbg.ll
new file mode 100644
index 00000000000..8bce1a65c15
--- /dev/null
+++ b/test/CodeGen/ARM/dbg.ll
@@ -0,0 +1,13 @@
+; RUN: llc -mtriple armv8-eabi -mcpu=cortex-a57 -o - %s | FileCheck %s
+; RUN: llc -mtriple thumbv8-eabi -mcpu=cortex-a57 -o - %s | FileCheck %s
+
+define void @hint_dbg() {
+entry:
+  call void @llvm.arm.dbg(i32 0)
+  ret void
+}
+
+declare void @llvm.arm.dbg(i32)
+
+; CHECK: dbg #0
+
-- 
2.34.1