radv: add RADV_DEBUG=checkir

This allows to run the LLVM verifier pass.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

src/amd/vulkan/radv_debug.h

@@ -48,6 +48,7 @@ enum {
 	RADV_DEBUG_INFO              = 0x40000,
 	RADV_DEBUG_ERRORS            = 0x80000,
 	RADV_DEBUG_STARTUP           = 0x100000,
+	RADV_DEBUG_CHECKIR           = 0x200000,
 };
 
 enum {

src/amd/vulkan/radv_device.c

@@ -410,6 +410,7 @@ static const struct debug_control radv_debug_options[] = {
 	{"info", RADV_DEBUG_INFO},
 	{"errors", RADV_DEBUG_ERRORS},
 	{"startup", RADV_DEBUG_STARTUP},
+	{"checkir", RADV_DEBUG_CHECKIR},
 	{NULL, 0}
 };
 

src/amd/vulkan/radv_nir_to_llvm.c

@@ -2967,13 +2967,17 @@ handle_shader_outputs_post(struct ac_shader_abi *abi, unsigned max_outputs,
 	}
 }
 
-static void ac_llvm_finalize_module(struct radv_shader_context *ctx)
+static void ac_llvm_finalize_module(struct radv_shader_context *ctx,
+				    const struct radv_nir_compiler_options *options)
 {
 	LLVMPassManagerRef passmgr;
 	/* Create the pass manager */
 	passmgr = LLVMCreateFunctionPassManagerForModule(
 							ctx->ac.module);
 
+	if (options->check_ir)
+		LLVMAddVerifierPass(passmgr);
+
 	/* This pass should eliminate all the load and store instructions */
 	LLVMAddPromoteMemoryToRegisterPass(passmgr);
 
@@ -3299,7 +3303,7 @@ LLVMModuleRef ac_translate_nir_to_llvm(LLVMTargetMachineRef tm,
 	if (options->dump_preoptir)
 		ac_dump_module(ctx.ac.module);
 
-	ac_llvm_finalize_module(&ctx);
+	ac_llvm_finalize_module(&ctx, options);
 
 	if (shader_count == 1)
 		ac_nir_eliminate_const_vs_outputs(&ctx);
@@ -3617,7 +3621,7 @@ radv_compile_gs_copy_shader(LLVMTargetMachineRef tm,
 
 	LLVMBuildRetVoid(ctx.ac.builder);
 
-	ac_llvm_finalize_module(&ctx);
+	ac_llvm_finalize_module(&ctx, options);
 
 	ac_compile_llvm_module(tm, ctx.ac.module, binary, config, shader_info,
 			       MESA_SHADER_VERTEX, options);

src/amd/vulkan/radv_shader.c

@@ -571,6 +571,7 @@ shader_variant_create(struct radv_device *device,
 	options->dump_preoptir = options->dump_shader &&
 				 device->instance->debug_flags & RADV_DEBUG_PREOPTIR;
 	options->record_llvm_ir = device->keep_shader_info;
+	options->check_ir = device->instance->debug_flags & RADV_DEBUG_CHECKIR;
 	options->tess_offchip_block_dw_size = device->tess_offchip_block_dw_size;
 	options->address32_hi = device->physical_device->rad_info.address32_hi;
 

src/amd/vulkan/radv_shader.h

@@ -119,6 +119,7 @@ struct radv_nir_compiler_options {
 	bool dump_shader;
 	bool dump_preoptir;
 	bool record_llvm_ir;
+	bool check_ir;
 	enum radeon_family family;
 	enum chip_class chip_class;
 	uint32_t tess_offchip_block_dw_size;