[MC] Implement RV64GC assembly emission

1 files changed, 52 insertions, 0 deletions

diff --git a/backend/tools/AssemblyEmitter/AssemblyPipelineTest.cmake b/backend/tools/AssemblyEmitter/AssemblyPipelineTest.cmake
new file mode 100644
index 0000000..baeedcf
--- /dev/null
+++ b/backend/tools/AssemblyEmitter/AssemblyPipelineTest.cmake
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+if(NOT DEFINED EMITTER OR NOT DEFINED INPUT OR NOT DEFINED OUTPUT)
+  message(FATAL_ERROR "assembly pipeline test is missing a required path")
+endif()
+
+execute_process(
+  COMMAND "${EMITTER}" --input "${INPUT}"
+  RESULT_VARIABLE FirstResult
+  OUTPUT_VARIABLE FirstAssembly
+  ERROR_VARIABLE FirstDiagnostics
+)
+if(NOT FirstResult EQUAL 0)
+  message(FATAL_ERROR "assembly pipeline failed: ${FirstDiagnostics}")
+endif()
+if(NOT FirstAssembly MATCHES "\\.attribute arch, \"rv64gc\"" OR
+   NOT FirstAssembly MATCHES "jalr x0, x1, 0")
+  message(FATAL_ERROR "assembly pipeline output is missing required RV64GC content")
+endif()
+if(INPUT MATCHES "RISCVDataPipeline" AND
+   (NOT FirstAssembly MATCHES "\\.LCPI[0-9]+_0:" OR
+    NOT FirstAssembly MATCHES "\\.LJTI[0-9]+_0:"))
+  message(FATAL_ERROR "assembly pipeline did not emit its constant pool and jump table")
+endif()
+
+execute_process(
+  COMMAND "${EMITTER}" --input "${INPUT}"
+  RESULT_VARIABLE SecondResult
+  OUTPUT_VARIABLE SecondAssembly
+  ERROR_VARIABLE SecondDiagnostics
+)
+if(NOT SecondResult EQUAL 0)
+  message(FATAL_ERROR "repeated assembly pipeline failed: ${SecondDiagnostics}")
+endif()
+if(NOT FirstAssembly STREQUAL SecondAssembly)
+  message(FATAL_ERROR "assembly pipeline output is not deterministic")
+endif()
+
+if(DEFINED LLVM_MC AND NOT LLVM_MC STREQUAL "LLVM_MC-NOTFOUND" AND
+   NOT LLVM_MC STREQUAL "")
+  file(WRITE "${OUTPUT}" "${FirstAssembly}")
+  execute_process(
+    COMMAND "${LLVM_MC}" -triple=riscv64-unknown-linux-gnu -filetype=null "${OUTPUT}"
+    RESULT_VARIABLE AssemblerResult
+    OUTPUT_VARIABLE AssemblerOutput
+    ERROR_VARIABLE AssemblerDiagnostics
+  )
+  file(REMOVE "${OUTPUT}")
+  if(NOT AssemblerResult EQUAL 0)
+    message(FATAL_ERROR "LLVM MC rejected generated assembly: ${AssemblerDiagnostics}")
+  endif()
+endif()