From 6bc1dbc37695bcfc5ae23a1a9e17550ee50fe02f Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Tue, 19 Jul 2011 16:50:30 +0000
Subject: [PATCH] ARM range checking for so_imm operands in assembly parsing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135489 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMInstrInfo.td            |  2 ++
 lib/Target/ARM/AsmParser/ARMAsmParser.cpp | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index a42dd1a54ec..9845e0be6f9 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -443,10 +443,12 @@ def shift_so_reg : Operand<i32>,    // reg reg imm
 
 // so_imm - Match a 32-bit shifter_operand immediate operand, which is an
 // 8-bit immediate rotated by an arbitrary number of bits.
+def SOImmAsmOperand: AsmOperandClass { let Name = "ARMSOImm"; }
 def so_imm : Operand<i32>, ImmLeaf<i32, [{
     return ARM_AM::getSOImmVal(Imm) != -1;
   }]> {
   let EncoderMethod = "getSOImmOpValue";
+  let ParserMatchClass = SOImmAsmOperand;
 }
 
 // Break so_imm's up into two pieces.  This handles immediates with up to 16
diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index a4741270c7a..a0f2726af31 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -407,6 +407,14 @@ public:
     int64_t Value = CE->getValue();
     return Value >= 0 && Value < 65536;
   }
+  bool isARMSOImm() const {
+    if (Kind != Immediate)
+      return false;
+    const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(getImm());
+    if (!CE) return false;
+    int64_t Value = CE->getValue();
+    return ARM_AM::getSOImmVal(Value) != -1;
+  }
   bool isT2SOImm() const {
     if (Kind != Immediate)
       return false;
@@ -613,6 +621,11 @@ public:
     addExpr(Inst, getImm());
   }
 
+  void addARMSOImmOperands(MCInst &Inst, unsigned N) const {
+    assert(N == 1 && "Invalid number of operands!");
+    addExpr(Inst, getImm());
+  }
+
   void addT2SOImmOperands(MCInst &Inst, unsigned N) const {
     assert(N == 1 && "Invalid number of operands!");
     addExpr(Inst, getImm());
-- 
2.34.1