From: Fangrui Song <maskray@google.com>
Date: Mon, 15 Apr 2019 09:01:10 +0000 (+0000)
Subject: Revert "[DWARF] Delete redundant check in DWARFAddressRange::intersects"
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=460838586d8b9581924d67161a425de6ba629ba8;p=llvm

Revert "[DWARF] Delete redundant check in DWARFAddressRange::intersects"

This reverts rL358377. It isn't redundant, though the semantic seems weird.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358381 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/DebugInfo/DWARF/DWARFAddressRange.h b/include/llvm/DebugInfo/DWARF/DWARFAddressRange.h
index 128b410d79e..56d46c696fd 100644
--- a/include/llvm/DebugInfo/DWARF/DWARFAddressRange.h
+++ b/include/llvm/DebugInfo/DWARF/DWARFAddressRange.h
@@ -36,6 +36,9 @@ struct DWARFAddressRange {
   /// Returns true if [LowPC, HighPC) intersects with [RHS.LowPC, RHS.HighPC).
   bool intersects(const DWARFAddressRange &RHS) const {
     assert(valid() && RHS.valid());
+    // Empty ranges can't intersect.
+    if (LowPC == HighPC || RHS.LowPC == RHS.HighPC)
+      return false;
     return LowPC < RHS.HighPC && RHS.LowPC < HighPC;
   }