[RISCV] Add test showing the current extern_weak lowering

Reviewed By: asb, MaskRay

Differential Revision: https://reviews.llvm.org/D107279

diff --git a/llvm/test/CodeGen/RISCV/codemodel-lowering.ll b/llvm/test/CodeGen/RISCV/codemodel-lowering.ll
index d3f8221..38752b8 100644 (file)
--- a/llvm/test/CodeGen/RISCV/codemodel-lowering.ll
+++ b/llvm/test/CodeGen/RISCV/codemodel-lowering.ll
@@ -138,3 +138,23 @@ define float @lower_constantpool(float %a) nounwind {
   %1 = fadd float %a, 1.0
   ret float %1
 }
+
+; Check lowering of extern_weaks
+@W = extern_weak global i32
+
+define i32 @lower_extern_weak(i32 %a) nounwind {
+; RV32I-SMALL-LABEL: lower_extern_weak:
+; RV32I-SMALL:       # %bb.0:
+; RV32I-SMALL-NEXT:    lui a0, %hi(W)
+; RV32I-SMALL-NEXT:    lw a0, %lo(W)(a0)
+; RV32I-SMALL-NEXT:    ret
+;
+; RV32I-MEDIUM-LABEL: lower_extern_weak:
+; RV32I-MEDIUM:       # %bb.0:
+; RV32I-MEDIUM-NEXT:  .Lpcrel_hi3:
+; RV32I-MEDIUM-NEXT:    auipc a0, %pcrel_hi(W)
+; RV32I-MEDIUM-NEXT:    lw a0, %pcrel_lo(.Lpcrel_hi3)(a0)
+; RV32I-MEDIUM-NEXT:    ret
+  %1 = load volatile i32, ptr @W
+  ret i32 %1
+}