[RISCV] Test %hi(absolute_symbol)

Author: MaskRay

llvm/test/MC/RISCV/linker-relaxation.s

@@ -137,6 +137,19 @@ sb t1, %pcrel_lo(2b)(a2)
 # RELAX-FIXUP: fixup A - offset: 0, value: %pcrel_lo(.Ltmp1), kind: fixup_riscv_pcrel_lo12_s
 # RELAX-FIXUP: fixup B - offset: 0, value: 0, kind: fixup_riscv_relax
 
+lui t2, %hi(abs)
+# NORELAX-RELOC-NOT: R_RISCV_
+# RELAX-RELOC:      R_RISCV_HI20 - 0x12345
+# RELAX-RELOC-NEXT: R_RISCV_RELAX - 0x0
+# RELAX-FIXUP:      fixup A - offset: 0, value: %hi(abs), kind: fixup_riscv_hi20
+# RELAX-FIXUP:      fixup B - offset: 0, value: 0, kind: fixup_riscv_relax
+
+.set abs, 0x12345
+
+lui t3, %hi(abs)
+# RELAX-RELOC-NOT:  R_RISCV_
+# RELAX-FIXUP-NOT:  fixup
+
 # Check that a relocation is not emitted for a symbol difference which has
 # been folded to a fixup with an absolute value. This can happen when a
 # difference expression refers to two symbols, at least one of which is