vendor/llvm/llvm-trunk-r338150

1 files changed, 44 insertions, 1 deletions

diff --git a/unittests/MC/Disassembler.cpp b/unittests/MC/Disassembler.cpp
index dd0f1ef9ace7..0a6871f6f857 100644
--- a/unittests/MC/Disassembler.cpp
+++ b/unittests/MC/Disassembler.cpp
@@ -21,7 +21,7 @@ static const char *symbolLookupCallback(void *DisInfo, uint64_t ReferenceValue,
   return nullptr;
 }
 
-TEST(Disassembler, Test1) {
+TEST(Disassembler, X86Test) {
   llvm::InitializeAllTargetInfos();
   llvm::InitializeAllTargetMCs();
   llvm::InitializeAllDisassemblers();
@@ -62,3 +62,46 @@ TEST(Disassembler, Test1) {
 
   LLVMDisasmDispose(DCR);
 }
+
+TEST(Disassembler, WebAssemblyTest) {
+  llvm::InitializeAllTargetInfos();
+  llvm::InitializeAllTargetMCs();
+  llvm::InitializeAllDisassemblers();
+
+  uint8_t Bytes[] = {0x6a, 0x42, 0x7F, 0x35, 0x01, 0x10};
+  uint8_t *BytesP = Bytes;
+  const char OutStringSize = 100;
+  char OutString[OutStringSize];
+  LLVMDisasmContextRef DCR = LLVMCreateDisasm("wasm32-unknown-unknown", nullptr,
+                                              0, nullptr, symbolLookupCallback);
+  if (!DCR)
+    return;
+
+  size_t InstSize;
+  unsigned NumBytes = sizeof(Bytes);
+  unsigned PC = 0;
+
+  InstSize = LLVMDisasmInstruction(DCR, BytesP, NumBytes, PC, OutString,
+                                   OutStringSize);
+  EXPECT_EQ(InstSize, 1U);
+  EXPECT_EQ(StringRef(OutString), "\ti32.add ");
+  PC += InstSize;
+  BytesP += InstSize;
+  NumBytes -= InstSize;
+
+  InstSize = LLVMDisasmInstruction(DCR, BytesP, NumBytes, PC, OutString,
+                                   OutStringSize);
+  EXPECT_EQ(InstSize, 2U);
+  EXPECT_EQ(StringRef(OutString), "\ti64.const\t-1");
+
+  PC += InstSize;
+  BytesP += InstSize;
+  NumBytes -= InstSize;
+
+  InstSize = LLVMDisasmInstruction(DCR, BytesP, NumBytes, PC, OutString,
+                                   OutStringSize);
+  EXPECT_EQ(InstSize, 3U);
+  EXPECT_EQ(StringRef(OutString), "\ti64.load32_u\t16, :p2align=1");
+
+  LLVMDisasmDispose(DCR);
+}