From: David Blaikie <dblaikie@gmail.com>
Date: Thu, 16 Mar 2017 00:52:18 +0000 (+0000)
Subject: Check that line table entries don't spill over between sections even if they're empty... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=bd97f5e153f21fd9fbb9e7d0501c34d7516ec569;p=llvm

Check that line table entries don't spill over between sections even if they're empty at the end of a section

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297922 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/MC/MCObjectStreamer.cpp b/lib/MC/MCObjectStreamer.cpp
index 2b89407547a..8f502fc3e2f 100644
--- a/lib/MC/MCObjectStreamer.cpp
+++ b/lib/MC/MCObjectStreamer.cpp
@@ -203,6 +203,7 @@ bool MCObjectStreamer::changeSectionImpl(MCSection *Section,
                                          const MCExpr *Subsection) {
   assert(Section && "Cannot switch to a null section!");
   flushPendingLabels(nullptr);
+  getContext().clearDwarfLocSeen();
 
   bool Created = getAssembler().registerSection(*Section);
 
diff --git a/test/MC/X86/line-table-sections.s b/test/MC/X86/line-table-sections.s
new file mode 100644
index 00000000000..93b911d9576
--- /dev/null
+++ b/test/MC/X86/line-table-sections.s
@@ -0,0 +1,15 @@
+// RUN: llvm-mc -triple x86_64-unknown-unknown -filetype=obj %s | llvm-objdump -r - | FileCheck %s
+// CHECK-NOT: RELOCATION RECORDS
+
+// ensure that a .loc directive at the end of a section doesn't bleed into the
+// following section previously this would produce a relocation for
+// .other_section in the line table. But it should actually produce no line
+// table entries at all.
+	.text
+	.file	1 "fail.cpp"
+	.loc	1 7 3 prologue_end      # fail.cpp:7:3
+	# addss   %xmm0, %xmm1
+
+	.section	.other_section,"",@progbits
+	.long	46                      # Length of Unit
+