radeon/llvm: enable LICM and DCE pass v2

LICM stands for Loop Invariant Code Motion. Instructions that
does not depend of loop index are moved outside of loop body.

DCE is DeadCodeElimination.

v2: updated commit msg, thx to Vincent.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Vincent Lejeune <vljn at ovi.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

diff --git a/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c b/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c
index f7b758670dd571d3837d51d0e3c727575c775238..f017b873217b67841e228c7b93f6bb76a70d051a 100644 (file)
--- a/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c
+++ b/src/gallium/drivers/radeon/radeon_setup_tgsi_llvm.c
@@ -1281,6 +1281,8 @@ void radeon_llvm_finalize_module(struct radeon_llvm_context * ctx)
 
        /* Add some optimization passes */
        LLVMAddScalarReplAggregatesPass(gallivm->passmgr);
+       LLVMAddLICMPass(gallivm->passmgr);
+       LLVMAddAggressiveDCEPass(gallivm->passmgr);
        LLVMAddCFGSimplificationPass(gallivm->passmgr);
 
        /* Run the passs */