Re-implement clspv-opt as a standalone driver (#346)
* Fix #307 and #322.
This re-implements clspv-opt as a standalone driver. The initial
implementation used the plugin facility for LLVM opt, but this is
difficult to implement in Windows (#307).
The driver only supports LLVM scalar transformations and all of clspv
transformations. To do this, passes must be declared using LLVM's
INITIALIZE_PASS macro. Additionally, the function
initializeClspvPasses() must include a call to the initialize*()
function generated by INITIALIZE_PASS.
This change also adds tests for all the existing passes in clspv. It
does not check for specific transformations. It checks that the flags
are accepted by clspv-opt.
Finally, this change reduces the build time for LLVM by building no
target backends by default.
diff --git a/lib/Compiler.cpp b/lib/Compiler.cpp
index 731727e..7eb8339 100644
--- a/lib/Compiler.cpp
+++ b/lib/Compiler.cpp
@@ -37,6 +37,7 @@
#include "clspv/opencl_builtins_header.h"
#include "FrontendPlugin.h"
+#include "Passes.h"
#include <cassert>
#include <numeric>