[AMDGPU][MC] Enabled parsing of relocations on VALU instructions

See bug 37566: https://bugs.llvm.org/show_bug.cgi?id=37566

Reviewers: artem.tamazov, arsenm, nhaehnle

Differential Revision: https://reviews.llvm.org/D47884

llvm-svn: 334622
diff --git a/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp b/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
index 1888cec..18cc67f 100644
--- a/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
+++ b/llvm/lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
@@ -443,7 +443,7 @@
   }
 
   bool isVSrcB32() const {
-    return isVCSrcF32() || isLiteralImm(MVT::i32);
+    return isVCSrcF32() || isLiteralImm(MVT::i32) || isExpr();
   }
 
   bool isVSrcB64() const {
@@ -460,7 +460,7 @@
   }
 
   bool isVSrcF32() const {
-    return isVCSrcF32() || isLiteralImm(MVT::f32);
+    return isVCSrcF32() || isLiteralImm(MVT::f32) || isExpr();
   }
 
   bool isVSrcF64() const {