diff --git a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCCodeEmitter.cpp b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCCodeEmitter.cpp
index ab7e51ac28322..abb5003f3320b 100644
--- a/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCCodeEmitter.cpp
+++ b/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCCodeEmitter.cpp
@@ -255,13 +255,9 @@ AMDGPUMCCodeEmitter::getLitEncoding(const MCOperand &MO,
                                     const MCSubtargetInfo &STI) const {
   int64_t Imm;
   if (MO.isExpr()) {
-    const auto *C = dyn_cast<MCConstantExpr>(MO.getExpr());
-    if (!C)
+    if (!MO.getExpr()->evaluateAsAbsolute(Imm))
       return 255;
-
-    Imm = C->getValue();
   } else {
-
     assert(!MO.isDFPImm());
 
     if (!MO.isImm())