[riscv64] Add block before LoadAddress

fix node.js DCHECK failed
issue: https://github.com/riscv-collab/v8/issues/514

Change-Id: I07f40e6aca05be3eb7304a43235185fd40ebc1f2
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3260979Reviewed-by: ji qiu <qiuji@iscas.ac.cn>
Commit-Queue: ji qiu <qiuji@iscas.ac.cn>
Auto-Submit: Yahan Lu <yahan@iscas.ac.cn>
Cr-Commit-Position: refs/heads/main@{#77750}

src/baseline/riscv64/baseline-assembler-riscv64-inl.h

@@ -437,6 +437,7 @@ void BaselineAssembler::Switch(Register reg, int case_value_base,
   CHECK(is_int32(imm64 + 0x800));
   int32_t Hi20 = (((int32_t)imm64 + 0x800) >> 12);
   int32_t Lo12 = (int32_t)imm64 << 20 >> 20;
+  __ BlockTrampolinePoolFor(2);
   __ auipc(t6, Hi20);  // Read PC + Hi20 into t6
   __ addi(t6, t6, Lo12);  // jump PC + Hi20 + Lo12
 

src/codegen/riscv64/macro-assembler-riscv64.cc

@@ -3543,6 +3543,7 @@ void TurboAssembler::LoadAddress(Register dst, Label* target,
     CHECK(is_int32(offset + 0x800));
     int32_t Hi20 = (((int32_t)offset + 0x800) >> 12);
     int32_t Lo12 = (int32_t)offset << 20 >> 20;
+    BlockTrampolinePoolScope block_trampoline_pool(this);
     auipc(dst, Hi20);
     addi(dst, dst, Lo12);
   } else {