From: Tom Stellard <thomas.stellard@amd.com>
Date: Tue, 14 May 2013 15:56:25 +0000 (-0700)
Subject: radeon/llvm: Run standard optimization passes on conpute shader modules
X-Git-Tag: mesa-9.2.1~1144
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=refs%2Fchanges%2F34%2F6634%2F1;p=platform%2Fupstream%2Fmesa.git

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.
---

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;
 }