Add support for lowercase variants.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124071 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCExpr.cpp b/lib/MC/MCExpr.cpp
index d927df3..54d3743 100644
--- a/lib/MC/MCExpr.cpp
+++ b/lib/MC/MCExpr.cpp
@@ -206,19 +206,33 @@
 MCSymbolRefExpr::getVariantKindForName(StringRef Name) {
   return StringSwitch<VariantKind>(Name)
     .Case("GOT", VK_GOT)
+    .Case("got", VK_GOT)
     .Case("GOTOFF", VK_GOTOFF)
+    .Case("gotoff", VK_GOTOFF)
     .Case("GOTPCREL", VK_GOTPCREL)
+    .Case("gotpcrel", VK_GOTPCREL)
     .Case("GOTTPOFF", VK_GOTTPOFF)
+    .Case("gottpoff", VK_GOTTPOFF)
     .Case("INDNTPOFF", VK_INDNTPOFF)
+    .Case("indntpoff", VK_INDNTPOFF)
     .Case("NTPOFF", VK_NTPOFF)
+    .Case("ntpoff", VK_NTPOFF)
     .Case("GOTNTPOFF", VK_GOTNTPOFF)
+    .Case("gotntpoff", VK_GOTNTPOFF)
     .Case("PLT", VK_PLT)
+    .Case("plt", VK_PLT)
     .Case("TLSGD", VK_TLSGD)
+    .Case("tlsgd", VK_TLSGD)
     .Case("TLSLD", VK_TLSLD)
+    .Case("tlsld", VK_TLSLD)
     .Case("TLSLDM", VK_TLSLDM)
+    .Case("tlsldm", VK_TLSLDM)
     .Case("TPOFF", VK_TPOFF)
+    .Case("tpoff", VK_TPOFF)
     .Case("DTPOFF", VK_DTPOFF)
+    .Case("dtpoff", VK_DTPOFF)
     .Case("TLVP", VK_TLVP)
+    .Case("tlvp", VK_TLVP)
     .Default(VK_Invalid);
 }
 
diff --git a/test/MC/ELF/relocation.s b/test/MC/ELF/relocation.s
index 697e4a6..dabe721 100644
--- a/test/MC/ELF/relocation.s
+++ b/test/MC/ELF/relocation.s
@@ -13,7 +13,7 @@
         leaq	foo@TLSGD(%rip), %rax    # R_X86_64_TLSGD
         leaq	foo@TPOFF(%rax), %rax    # R_X86_64_TPOFF32
         leaq	foo@TLSLD(%rip), %rdi    # R_X86_64_TLSLD
-        leaq	foo@DTPOFF(%rax), %rcx   # R_X86_64_DTPOFF32
+        leaq	foo@dtpoff(%rax), %rcx   # R_X86_64_DTPOFF32
         pushq    $bar
         movq	foo(%rip), %rdx
         leaq    foo-bar(%r14),%r14