MC: When parsing a variable reference, substitute absolute variables immediately
since they are allowed to be redefined.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84230 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/MC/AsmParser/variables.s b/test/MC/AsmParser/variables.s
new file mode 100644
index 0000000..86fea27
--- /dev/null
+++ b/test/MC/AsmParser/variables.s
@@ -0,0 +1,15 @@
+// RUN: llvm-mc %s
+
+        .data
+        t0_v0 = 1
+        t0_v1 = t0_v0
+        .if t0_v1 != 1
+        .abort "invalid value"
+        .endif
+
+        t1_v0 = 1
+        t1_v1 = t0_v0
+        t1_v0 = 2
+        .if t0_v1 != 1
+        .abort "invalid value"
+        .endif