From 9bcc7a6973f76255765124fbc4e8f6022bd9f756 Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Wed, 8 Feb 2012 18:46:26 +0000
Subject: [PATCH] Don't map registers to the invalid dwarf register (-1). It's
 the default value.

 X86GenRegisterInfo.inc | 1032 -------------------------------------------------
  1 file changed, 1032 deletions(-)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150080 91177308-0d34-0410-b5e6-96231b3b80d8
---
 utils/TableGen/RegisterInfoEmitter.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/utils/TableGen/RegisterInfoEmitter.cpp b/utils/TableGen/RegisterInfoEmitter.cpp
index 2f8b4b821e9..cfac70172d4 100644
--- a/utils/TableGen/RegisterInfoEmitter.cpp
+++ b/utils/TableGen/RegisterInfoEmitter.cpp
@@ -187,6 +187,9 @@ RegisterInfoEmitter::EmitRegMapping(raw_ostream &OS,
       for (DwarfRegNumsMapTy::iterator
              I = DwarfRegNums.begin(), E = DwarfRegNums.end(); I != E; ++I) {
         int RegNo = I->second[i];
+        if (RegNo == -1) // -1 is the default value, don't emit a mapping.
+          continue;
+
         OS << "    ";
         if (!isCtor)
           OS << "RI->";