commit c8ccd1f1c5cba21a36e65f284929499b2f7a31b5
author George Rimar <grimar@accesssoftek.com> Fri Sep 23 13:13:55 2016 +0000
committer George Rimar <grimar@accesssoftek.com> Fri Sep 23 13:13:55 2016 +0000
tree 54c11496d33a6eaba70e2f680f847da46f2ee326
parent 1ff60ef28673f613db887bebcb7971bac0d98ef7

[ELF] - Linkerscript: Implemented >> and <<

Found this operators used in the wild scripts, for example:

__got2_entries = (_FIXUP_TABLE_ - _GOT2_TABLE_) >>2;
__fixup_entries = (. - _FIXUP_TABLE_)>>2;

Differential revision: https://reviews.llvm.org/D24860

llvm-svn: 282243

lld/ELF/LinkerScript.cpp

diff --git a/lld/ELF/LinkerScript.cpp b/lld/ELF/LinkerScript.cpp
index 74712a2..1b240f4 100644
--- a/lld/ELF/LinkerScript.cpp
+++ b/lld/ELF/LinkerScript.cpp
@@ -1081,10 +1081,12 @@
 
 static int precedence(StringRef Op) {
   return StringSwitch<int>(Op)
-      .Case("*", 4)
-      .Case("/", 4)
-      .Case("+", 3)
-      .Case("-", 3)
+      .Case("*", 5)
+      .Case("/", 5)
+      .Case("+", 4)
+      .Case("-", 4)
+      .Case("<<", 3)
+      .Case(">>", 3)
       .Case("<", 2)
       .Case(">", 2)
       .Case(">=", 2)
@@ -1361,6 +1363,10 @@
     return [=](uint64_t Dot) { return L(Dot) + R(Dot); };
   if (Op == "-")
     return [=](uint64_t Dot) { return L(Dot) - R(Dot); };
+  if (Op == "<<")
+    return [=](uint64_t Dot) { return L(Dot) << R(Dot); };
+  if (Op == ">>")
+    return [=](uint64_t Dot) { return L(Dot) >> R(Dot); };
   if (Op == "<")
     return [=](uint64_t Dot) { return L(Dot) < R(Dot); };
   if (Op == ">")