From d195e99bc8c6ca5fed506239e298d023df20e942 Mon Sep 17 00:00:00 2001
From: Alkis Evlogimenos <alkis@evlogimenos.com>
Date: Thu, 19 Feb 2004 19:24:17 +0000
Subject: [PATCH] Fix RA::verifyAssignment()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11629 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/RegAllocLinearScan.cpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index a1d9a116de7..67adeb5e7eb 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -210,13 +210,17 @@ namespace {
         void verifyAssignment() const {
             for (Virt2PhysMap::const_iterator i = v2pMap_.begin(),
                      e = v2pMap_.end(); i != e; ++i)
-                for (Virt2PhysMap::const_iterator i2 = i; i2 != e; ++i2)
-                    if (mri_->areAliases(i->second, i2->second)) {
+                for (Virt2PhysMap::const_iterator i2 = next(i); i2 != e; ++i2)
+                    if (MRegisterInfo::isVirtualRegister(i->second) &&
+                        (i->second == i2->second ||
+                         mri_->areAliases(i->second, i2->second))) {
                         const LiveIntervals::Interval
                             &in = li_->getInterval(i->second),
                             &in2 = li_->getInterval(i2->second);
-                        assert(!in.overlaps(in2) &&
-                               "overlapping intervals for same register!");
+                        if (in.overlaps(in2)) {
+                            std::cerr << in << " overlaps " << in2 << '\n';
+                            assert(0);
+                        }
                     }
         }
     };