From 88f6e9e83a380bc99db519cba31285d6b90664e2 Mon Sep 17 00:00:00 2001
From: Christian Kamm <kamm@incasoftware.de>
Date: Fri, 26 Jun 2009 21:02:23 +0200
Subject: [PATCH] Initialize LLVM target and asmprinter for the native and
 extra targets.

Uses some CMake hackery to get the native LLVM target name, since it only
provides a conveniance function for initializing the native target and not the
native asmprinter.
---
 CMakeLists.txt | 30 +++++++++++++++++++++++-------
 gen/main.cpp   | 17 +++++++++++++++--
 2 files changed, 38 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f2757939..bc5a56b0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,13 +54,6 @@ execute_process(
 	OUTPUT_STRIP_TRAILING_WHITESPACE
 )
 
-set(EXTRA_LLVM_MODULES "" CACHE STRING "extra llvm components to link in (see llvm-config --components)")
-execute_process(
-	COMMAND ${PERL_EXECUTABLE} ${LLVM_CONFIG} --libfiles bitwriter linker ipo instrumentation backend ${EXTRA_LLVM_MODULES}
-	OUTPUT_VARIABLE LLVM_LIBS
-	OUTPUT_STRIP_TRAILING_WHITESPACE
-)
-
 set(D_VERSION 1 CACHE STRING "D language version")
 set(PROGRAM_PREFIX CACHE STRING "prepended to ldc binary name")
 set(PROGRAM_SUFFIX CACHE STRING "appended to ldc binary name")
@@ -135,6 +128,29 @@ set(DEFAULT_ALT_TARGET ${HOST_ALT_TARGET} CACHE STRING "default alt target")
 
 include_directories(. ${DMDFE_PATH} ${DMDFE_PATH}/root ${PROJECT_BINARY_DIR}/${DMDFE_PATH} ${PROJECT_BINARY_DIR} ${LLVM_INSTDIR}/include)
 
+set(EXTRA_LLVM_MODULES "" CACHE STRING "extra llvm components to link in (see llvm-config --components)")
+separate_arguments(EXTRA_LLVM_MODULES)
+execute_process(
+        COMMAND ${PERL_EXECUTABLE} ${LLVM_CONFIG} --libfiles bitwriter linker ipo instrumentation backend ${EXTRA_LLVM_MODULES}
+        OUTPUT_VARIABLE LLVM_LIBS
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+)
+
+# build a define that contains all LLVM targets required and is usable for
+# preprocessor code generation. start with the native target.
+file(STRINGS ${LLVM_INSTDIR}/include/llvm/Config/config.h LLVM_NATIVE_ARCH REGEX "^#define LLVM_NATIVE_ARCH")
+string(REGEX REPLACE "^#define LLVM_NATIVE_ARCH (.*)Target$" "\\1" LLVM_NATIVE_ARCH ${LLVM_NATIVE_ARCH})
+set(LLVM_MODULES_DEFINE "LLVM_TARGET(${LLVM_NATIVE_ARCH})")
+# chain the extra target list to the define
+foreach(EXTRA_TARGET ${EXTRA_LLVM_MODULES})
+    set(LLVM_MODULES_DEFINE "${LLVM_MODULES_DEFINE} LLVM_TARGET(${EXTRA_TARGET})")
+endforeach(EXTRA_TARGET)
+set_source_files_properties(
+    ${PROJECT_SOURCE_DIR}/gen/main.cpp PROPERTIES
+    COMPILE_DEFINITIONS LDC_TARGETS=${LLVM_MODULES_DEFINE}
+)
+
+
 file(GLOB FE_SRC ${DMDFE_PATH}/*.c)
 file(GLOB FE_SRC_ROOT ${DMDFE_PATH}/root/*.c)
 file(GLOB_RECURSE GEN_SRC gen/*.cpp)
diff --git a/gen/main.cpp b/gen/main.cpp
index aa600f2c..5920d8a2 100644
--- a/gen/main.cpp
+++ b/gen/main.cpp
@@ -4,6 +4,7 @@
 // which uses the llvm license
 
 #include "gen/llvm.h"
+#include "gen/llvm-version.h"
 #include "llvm/LinkAllVMCore.h"
 #include "llvm/Linker.h"
 #include "llvm/System/Signals.h"
@@ -11,6 +12,9 @@
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetOptions.h"
 #include "llvm/Target/TargetMachineRegistry.h"
+#if LLVM_REV >= 73610
+#include "llvm/Target/TargetSelect.h"
+#endif
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -421,8 +425,17 @@ int main(int argc, char** argv)
 
     mod.setTargetTriple(global.params.targetTriple);
 
-    // Allocate target machine.  First, check whether the user has
-    // explicitly specified an architecture to compile for.
+    // Allocate target machine.
+    
+    // first initialize llvm
+#if LLVM_REV >= 73610
+#define LLVM_TARGET(A) LLVMInitialize##A##Target(); LLVMInitialize##A##AsmPrinter();
+// this is defined to be LLVM_TARGET(target name 1) LLVM_TARGET(target name 2) ...
+LDC_TARGETS
+#undef LLVM_TARGET
+#endif
+
+    // Check whether the user has explicitly specified an architecture to compile for.
     if (mArch == 0)
     {
         std::string Err;