From f99eedeb72644671cd584f48e4c136d47f6b0020 Mon Sep 17 00:00:00 2001
From: Fangrui Song <maskray@google.com>
Date: Thu, 12 Dec 2019 16:18:57 -0800
Subject: [PATCH] [MC][PowerPC] Fix a crash when redefining a symbol after .set

Fix PR44284. This is probably not valid assembly but we should not crash.

Reviewed By: luporl, #powerpc, steven.zhang

Differential Revision: https://reviews.llvm.org/D71443
---
 llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp | 3 ++-
 llvm/test/MC/PowerPC/ppc64-localentry-symbols.s          | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
index 00df9e41fdae..5e91bdb2f8de 100644
--- a/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
+++ b/llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
@@ -201,7 +201,8 @@ public:
 
   void finish() override {
     for (auto *Sym : UpdateOther)
-      copyLocalEntry(Sym, Sym->getVariableValue());
+      if (Sym->isVariable())
+        copyLocalEntry(Sym, Sym->getVariableValue());
   }
 
 private:
diff --git a/llvm/test/MC/PowerPC/ppc64-localentry-symbols.s b/llvm/test/MC/PowerPC/ppc64-localentry-symbols.s
index f1d5c5d0ab1a..a663af57ad45 100644
--- a/llvm/test/MC/PowerPC/ppc64-localentry-symbols.s
+++ b/llvm/test/MC/PowerPC/ppc64-localentry-symbols.s
@@ -32,3 +32,8 @@ func:
   nop
   nop
   .localentry func, 8
+
+## PR44284 Don't crash if err is redefined after .set
+.set err, _err
+.globl err
+err: