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 f7b7586..f017b87 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 */