From de626ad8726677328e10dbdc15011254214437d7 Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Thu, 22 Dec 2011 17:37:00 +0000
Subject: ARM assembly parser canonicallize on 'lsl' for shift-by-zero form.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147152 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/AsmParser/ARMAsmParser.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'lib')

diff --git a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
index 4f4a135..d70511f 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmParser.cpp
@@ -2421,6 +2421,10 @@ int ARMAsmParser::tryParseShiftRegister(
         Error(ImmLoc, "immediate shift value out of range");
         return -1;
       }
+      // shift by zero is a nop. Always send it through as lsl.
+      // ('as' compatibility)
+      if (Imm == 0)
+        ShiftTy = ARM_AM::lsl;
     } else if (Parser.getTok().is(AsmToken::Identifier)) {
       ShiftReg = tryParseRegister();
       SMLoc L = Parser.getTok().getLoc();
-- 
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