From 3efad8fad41f6ba8141befcc3fc6662246b663ad Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Thu, 16 Dec 2010 19:11:16 +0000
Subject: [PATCH] Pseudo-ize the Thumb1 tBfar pattern. rdar://8777974

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121990 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMAsmPrinter.cpp | 8 ++++++++
 lib/Target/ARM/ARMInstrThumb.td  | 7 ++++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/lib/Target/ARM/ARMAsmPrinter.cpp b/lib/Target/ARM/ARMAsmPrinter.cpp
index 267c5ddf0df..ae808914c6d 100644
--- a/lib/Target/ARM/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/ARMAsmPrinter.cpp
@@ -746,6 +746,14 @@ void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
     }
     return;
   }
+  case ARM::tBfar: {
+    MCInst TmpInst;
+    TmpInst.setOpcode(ARM::tBL);
+    TmpInst.addOperand(MCOperand::CreateExpr(MCSymbolRefExpr::Create(
+          MI->getOperand(0).getMBB()->getSymbol(), OutContext)));
+    OutStreamer.EmitInstruction(TmpInst);
+    return;
+  }
   case ARM::LEApcrel:
   case ARM::tLEApcrel:
   case ARM::t2LEApcrel: {
diff --git a/lib/Target/ARM/ARMInstrThumb.td b/lib/Target/ARM/ARMInstrThumb.td
index 70aeb37eccc..56356514bdf 100644
--- a/lib/Target/ARM/ARMInstrThumb.td
+++ b/lib/Target/ARM/ARMInstrThumb.td
@@ -535,10 +535,11 @@ let isBranch = 1, isTerminator = 1, isBarrier = 1 in {
   }
 
   // Far jump
-  // FIXME: Encoding. This should probably be a pseudo for tBL
+  // Just a pseudo for a tBL instruction. Needed to let regalloc know about
+  // the clobber of LR.
   let Defs = [LR] in
-  def tBfar : TIx2<0b11110, 0b11, 1, (outs), (ins brtarget:$target), IIC_Br,
-                    "bl\t$target",[]>;
+  def tBfar : tPseudoInst<(outs), (ins t_bltarget:$target),
+                          Size4Bytes, IIC_Br, []>;
 
   def tBR_JTr : tPseudoInst<(outs),
                       (ins tGPR:$target, i32imm:$jt, i32imm:$id),