Move LLVM optimization procedures to a separate file to aid with organization

1 files changed, 169 insertions, 0 deletions

diff --git a/src/llvm_backend_opt.cpp b/src/llvm_backend_opt.cpp
new file mode 100644
index 000000000..1d2982e51
--- /dev/null
+++ b/src/llvm_backend_opt.cpp
@@ -0,0 +1,169 @@
+void lb_populate_function_pass_manager(LLVMPassManagerRef fpm, bool ignore_memcpy_pass) {
+	if (!ignore_memcpy_pass) {
+		LLVMAddMemCpyOptPass(fpm);
+	}
+	if (build_context.optimization_level == 0) {
+		LLVMAddPromoteMemoryToRegisterPass(fpm);
+		LLVMAddMergedLoadStoreMotionPass(fpm);
+		LLVMAddEarlyCSEPass(fpm);
+		// LLVMAddEarlyCSEMemSSAPass(fpm);
+		LLVMAddConstantPropagationPass(fpm);
+		LLVMAddMergedLoadStoreMotionPass(fpm);
+		LLVMAddPromoteMemoryToRegisterPass(fpm);
+		LLVMAddCFGSimplificationPass(fpm);
+
+		// LLVMAddSLPVectorizePass(fpm);
+		// LLVMAddLoopVectorizePass(fpm);
+
+		// LLVMAddScalarizerPass(fpm);
+		// LLVMAddLoopIdiomPass(fpm);
+		return;
+	}
+
+	LLVMAddSCCPPass(fpm);
+
+	LLVMAddPromoteMemoryToRegisterPass(fpm);
+	LLVMAddUnifyFunctionExitNodesPass(fpm);
+
+	LLVMAddCFGSimplificationPass(fpm);
+	LLVMAddScalarReplAggregatesPass(fpm);
+	LLVMAddEarlyCSEPass(fpm);
+	LLVMAddLowerExpectIntrinsicPass(fpm);
+}
+
+void lb_add_function_simplifcation_passes(LLVMPassManagerRef mpm) {
+	LLVMAddScalarReplAggregatesPass(mpm);
+	LLVMAddEarlyCSEMemSSAPass(mpm);
+
+	LLVMAddGVNPass(mpm);
+	LLVMAddCFGSimplificationPass(mpm);
+
+	LLVMAddJumpThreadingPass(mpm);
+
+	if (build_context.optimization_level > 2) {
+		LLVMAddAggressiveInstCombinerPass(mpm);
+	}
+	LLVMAddInstructionCombiningPass(mpm);
+	LLVMAddSimplifyLibCallsPass(mpm);
+
+	LLVMAddTailCallEliminationPass(mpm);
+	LLVMAddCFGSimplificationPass(mpm);
+	LLVMAddReassociatePass(mpm);
+
+	LLVMAddLoopRotatePass(mpm);
+	LLVMAddLICMPass(mpm);
+	LLVMAddLoopUnswitchPass(mpm);
+
+	LLVMAddCFGSimplificationPass(mpm);
+	LLVMAddInstructionCombiningPass(mpm);
+	LLVMAddIndVarSimplifyPass(mpm);
+	LLVMAddLoopIdiomPass(mpm);
+	LLVMAddLoopDeletionPass(mpm);
+
+	LLVMAddLoopUnrollPass(mpm);
+
+	LLVMAddMergedLoadStoreMotionPass(mpm);
+
+	LLVMAddGVNPass(mpm);
+
+	LLVMAddMemCpyOptPass(mpm);
+	LLVMAddSCCPPass(mpm);
+
+	LLVMAddBitTrackingDCEPass(mpm);
+
+	LLVMAddInstructionCombiningPass(mpm);
+	LLVMAddJumpThreadingPass(mpm);
+	LLVMAddCorrelatedValuePropagationPass(mpm);
+	LLVMAddDeadStoreEliminationPass(mpm);
+	LLVMAddLICMPass(mpm);
+
+	LLVMAddLoopRerollPass(mpm);
+	LLVMAddAggressiveDCEPass(mpm);
+	LLVMAddCFGSimplificationPass(mpm);
+	LLVMAddInstructionCombiningPass(mpm);
+}
+
+
+void lb_populate_module_pass_manager(LLVMTargetMachineRef target_machine, LLVMPassManagerRef mpm) {
+	LLVMPassManagerBuilderRef pmb = LLVMPassManagerBuilderCreate();
+	LLVMPassManagerBuilderSetOptLevel(pmb, build_context.optimization_level);
+	LLVMPassManagerBuilderSetSizeLevel(pmb, build_context.optimization_level);
+
+	LLVMPassManagerBuilderPopulateLTOPassManager(pmb, mpm, false, true);
+
+	LLVMAddAlwaysInlinerPass(mpm);
+	LLVMAddStripDeadPrototypesPass(mpm);
+	LLVMAddAnalysisPasses(target_machine, mpm);
+	LLVMAddPruneEHPass(mpm);
+	if (build_context.optimization_level == 0) {
+		// LLVMAddMergeFunctionsPass(mpm);
+		return;
+	}
+
+	LLVMAddGlobalDCEPass(mpm);
+
+	LLVMAddIPSCCPPass(mpm);
+	LLVMAddCalledValuePropagationPass(mpm);
+
+	LLVMAddGlobalOptimizerPass(mpm);
+	LLVMAddDeadArgEliminationPass(mpm);
+
+	// LLVMAddConstantMergePass(mpm); // ???
+	LLVMAddInstructionCombiningPass(mpm);
+	LLVMAddCFGSimplificationPass(mpm);
+
+	LLVMAddPruneEHPass(mpm);
+	LLVMAddFunctionInliningPass(mpm);
+
+	if (build_context.optimization_level > 2) {
+		LLVMAddArgumentPromotionPass(mpm);
+	}
+	lb_add_function_simplifcation_passes(mpm);
+
+	LLVMAddGlobalOptimizerPass(mpm);
+
+	// LLVMAddLowerConstantIntrinsicsPass(mpm);
+
+	LLVMAddLoopRotatePass(mpm);
+
+	LLVMAddLoopVectorizePass(mpm);
+
+	LLVMAddInstructionCombiningPass(mpm);
+	if (build_context.optimization_level >= 2) {
+		LLVMAddEarlyCSEPass(mpm);
+		LLVMAddCorrelatedValuePropagationPass(mpm);
+		LLVMAddLICMPass(mpm);
+		LLVMAddLoopUnswitchPass(mpm);
+		LLVMAddCFGSimplificationPass(mpm);
+		LLVMAddInstructionCombiningPass(mpm);
+	}
+
+	LLVMAddCFGSimplificationPass(mpm);
+
+	LLVMAddSLPVectorizePass(mpm);
+	LLVMAddLICMPass(mpm);
+
+	LLVMAddAlignmentFromAssumptionsPass(mpm);
+
+	LLVMAddStripDeadPrototypesPass(mpm);
+
+	if (build_context.optimization_level >= 2) {
+		LLVMAddGlobalDCEPass(mpm);
+		LLVMAddConstantMergePass(mpm);
+	}
+
+	LLVMAddCFGSimplificationPass(mpm);
+
+
+	#if 0
+		LLVMAddAlwaysInlinerPass(mpm);
+		LLVMAddStripDeadPrototypesPass(mpm);
+		LLVMAddAnalysisPasses(target_machine, mpm);
+		if (build_context.optimization_level >= 2) {
+			LLVMAddArgumentPromotionPass(mpm);
+			LLVMAddConstantMergePass(mpm);
+			LLVMAddGlobalDCEPass(mpm);
+			LLVMAddDeadArgEliminationPass(mpm);
+		}
+	#endif
+}