Mesa (master): radeon/llvm: Run standard optimization passes on conpute shader modules

[Tom Stellard]

Module: Mesa
Branch: master
Commit: e230d9debbd4c2e715f50059a02d502d90a626d7
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e230d9debbd4c2e715f50059a02d502d90a626d7

Author: Tom Stellard <thomas.stellard at amd.com>
Date:   Tue May 14 08:56:25 2013 -0700

radeon/llvm: Run standard optimization passes on conpute shader modules

The SROA and function inliner passes are espically important, because
they optimize away unsupported features: functions and indirect
private memory access.

---

 src/gallium/drivers/radeon/radeon_llvm_util.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/src/gallium/drivers/radeon/radeon_llvm_util.c b/src/gallium/drivers/radeon/radeon_llvm_util.c
index e3b0d63..25be245 100644
--- a/src/gallium/drivers/radeon/radeon_llvm_util.c
+++ b/src/gallium/drivers/radeon/radeon_llvm_util.c
@@ -29,6 +29,7 @@
 
 #include <llvm-c/BitReader.h>
 #include <llvm-c/Core.h>
+#include <llvm-c/Transforms/PassManagerBuilder.h>
 
 LLVMModuleRef radeon_llvm_parse_bitcode(const unsigned char * bitcode,
 							unsigned bitcode_len)
@@ -50,6 +51,19 @@ unsigned radeon_llvm_get_num_kernels(const unsigned char *bitcode,
 	return LLVMGetNamedMetadataNumOperands(mod, "opencl.kernels");
 }
 
+static void radeon_llvm_optimize(LLVMModuleRef mod)
+{
+	LLVMPassManagerBuilderRef builder = LLVMPassManagerBuilderCreate();
+	LLVMPassManagerRef pass_manager = LLVMCreatePassManager();
+
+	LLVMPassManagerBuilderUseInlinerWithThreshold(builder, 1000000000);
+	LLVMPassManagerBuilderPopulateModulePassManager(builder, pass_manager);
+
+	LLVMRunPassManager(pass_manager, mod);
+	LLVMPassManagerBuilderDispose(builder);
+	LLVMDisposePassManager(pass_manager);
+}
+
 LLVMModuleRef radeon_llvm_get_kernel_module(unsigned index,
 		const unsigned char *bitcode, unsigned bitcode_len)
 {
@@ -72,5 +86,6 @@ LLVMModuleRef radeon_llvm_get_kernel_module(unsigned index,
 		LLVMDeleteFunction(kernel_function);
 	}
 	FREE(kernel_metadata);
+	radeon_llvm_optimize(mod);
 	return mod;
 }