[test] Improve R_RISCV_PLT32 and R_RISCV_GOT32_PCREL tests

Author: MaskRay

llvm/test/MC/RISCV/data-directive-specifier.s

@@ -0,0 +1,43 @@
+# RUN: llvm-mc -triple=riscv64 -filetype=obj %s | llvm-readobj -r - | FileCheck %s --check-prefixes=CHECK,RV64
+# RUN: llvm-mc -triple=riscv32 -filetype=obj %s | llvm-readobj -r - | FileCheck %s --check-prefixes=CHECK,RV32
+
+# RUN: not llvm-mc -triple=riscv64 -filetype=obj %s --defsym ERR=1 -o /dev/null 2>&1 | FileCheck %s --check-prefix=ERR --implicit-check-not=error:
+
+.globl g
+g:
+l:
+
+# CHECK:      Section ({{.*}}) .rela.data {
+# CHECK-NEXT:   0x0 R_RISCV_PLT32 l 0x0
+# CHECK-NEXT:   0x4 R_RISCV_PLT32 l 0x4
+# CHECK-NEXT:   0x8 R_RISCV_PLT32 extern 0x4
+# CHECK-NEXT:   0xC R_RISCV_PLT32 g 0x8
+# CHECK-NEXT:   0x10 R_RISCV_PLT32 g 0x18
+# CHECK-NEXT: }
+.data
+.word l@plt - .
+.word l@plt - .data
+
+.word extern@plt - . + 4
+.word g@plt - . + 8
+.word g@plt - .data + 8
+
+# CHECK:      Section ({{.*}}) .rela.data1 {
+# CHECK-NEXT:   0x0 R_RISCV_GOT32_PCREL data1 0x0
+# CHECK-NEXT:   0x4 R_RISCV_GOT32_PCREL extern 0x4
+# RV32-NEXT:    0x8 R_RISCV_GOT32_PCREL extern 0xFFFFFFFB
+# RV64-NEXT:    0x8 R_RISCV_GOT32_PCREL extern 0xFFFFFFFFFFFFFFFB
+# CHECK-NEXT: }
+.section .data1,"aw"
+data1:
+.word data1@GOTPCREL
+.word extern@gotpcrel+4
+.word extern@GOTPCREL-5
+
+.ifdef ERR
+# ERR: [[#@LINE+1]]:7: error: symbol 'und' can not be undefined in a subtraction expression
+.word extern@plt - und
+
+# ERR: [[#@LINE+1]]:7: error: symbol 'und' can not be undefined in a subtraction expression
+.word extern@gotpcrel - und
+.endif