[Mesa-dev] [PATCH 1/3] ac: add ac_count_scratch_private_memory()

[Samuel Pitoiset]

Imported from RadeonSI.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/amd/common/ac_llvm_util.c            | 31 +++++++++++++++++++++++++++++++
 src/amd/common/ac_llvm_util.h            |  3 +++
 src/gallium/drivers/radeonsi/si_shader.c | 32 ++++----------------------------
 3 files changed, 38 insertions(+), 28 deletions(-)

diff --git a/src/amd/common/ac_llvm_util.c b/src/amd/common/ac_llvm_util.c
index b88c4e4979..3530bf088b 100644
--- a/src/amd/common/ac_llvm_util.c
+++ b/src/amd/common/ac_llvm_util.c
@@ -24,10 +24,12 @@
  */
 /* based on pieces from si_pipe.c and radeon_llvm_emit.c */
 #include "ac_llvm_util.h"
+#include "ac_llvm_build.h"
 #include "util/bitscan.h"
 #include <llvm-c/Core.h>
 #include <llvm-c/Support.h>
 #include "c11/threads.h"
+#include "util/u_math.h"
 
 #include <assert.h>
 #include <stdio.h>
@@ -207,3 +209,32 @@ ac_llvm_add_target_dep_function_attr(LLVMValueRef F,
 	snprintf(str, sizeof(str), "%i", value);
 	LLVMAddTargetDependentFunctionAttr(F, name, str);
 }
+
+unsigned
+ac_count_scratch_private_memory(LLVMValueRef function)
+{
+	unsigned private_mem_vgprs = 0;
+
+	/* Process all LLVM instructions. */
+	LLVMBasicBlockRef bb = LLVMGetFirstBasicBlock(function);
+	while (bb) {
+		LLVMValueRef next = LLVMGetFirstInstruction(bb);
+
+		while (next) {
+			LLVMValueRef inst = next;
+			next = LLVMGetNextInstruction(next);
+
+			if (LLVMGetInstructionOpcode(inst) != LLVMAlloca)
+				continue;
+
+			LLVMTypeRef type = LLVMGetElementType(LLVMTypeOf(inst));
+			/* No idea why LLVM aligns allocas to 4 elements. */
+			unsigned alignment = LLVMGetAlignment(inst);
+			unsigned dw_size = align(ac_get_type_size(type) / 4, alignment);
+			private_mem_vgprs += dw_size;
+		}
+		bb = LLVMGetNextBasicBlock(bb);
+	}
+
+	return private_mem_vgprs;
+}
diff --git a/src/amd/common/ac_llvm_util.h b/src/amd/common/ac_llvm_util.h
index 3cf385a33e..5329bb1b70 100644
--- a/src/amd/common/ac_llvm_util.h
+++ b/src/amd/common/ac_llvm_util.h
@@ -105,6 +105,9 @@ ac_get_store_intr_attribs(bool writeonly_memory)
 				  AC_FUNC_ATTR_WRITEONLY;
 }
 
+unsigned
+ac_count_scratch_private_memory(LLVMValueRef function);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 2a50b266f6..74bd435124 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -5957,32 +5957,6 @@ static void si_optimize_vs_outputs(struct si_shader_context *ctx)
 			       &shader->info.nr_param_exports);
 }
 
-static void si_count_scratch_private_memory(struct si_shader_context *ctx)
-{
-	ctx->shader->config.private_mem_vgprs = 0;
-
-	/* Process all LLVM instructions. */
-	LLVMBasicBlockRef bb = LLVMGetFirstBasicBlock(ctx->main_fn);
-	while (bb) {
-		LLVMValueRef next = LLVMGetFirstInstruction(bb);
-
-		while (next) {
-			LLVMValueRef inst = next;
-			next = LLVMGetNextInstruction(next);
-
-			if (LLVMGetInstructionOpcode(inst) != LLVMAlloca)
-				continue;
-
-			LLVMTypeRef type = LLVMGetElementType(LLVMTypeOf(inst));
-			/* No idea why LLVM aligns allocas to 4 elements. */
-			unsigned alignment = LLVMGetAlignment(inst);
-			unsigned dw_size = align(ac_get_type_size(type) / 4, alignment);
-			ctx->shader->config.private_mem_vgprs += dw_size;
-		}
-		bb = LLVMGetNextBasicBlock(bb);
-	}
-}
-
 static void si_init_exec_from_input(struct si_shader_context *ctx,
 				    unsigned param, unsigned bitoffset)
 {
@@ -6929,8 +6903,10 @@ int si_compile_tgsi_shader(struct si_screen *sscreen,
 	si_optimize_vs_outputs(&ctx);
 
 	if ((debug && debug->debug_message) ||
-	    si_can_dump_shader(sscreen, ctx.type))
-		si_count_scratch_private_memory(&ctx);
+	    si_can_dump_shader(sscreen, ctx.type)) {
+		ctx.shader->config.private_mem_vgprs =
+			ac_count_scratch_private_memory(ctx.main_fn);
+	}
 
 	/* Compile to bytecode. */
 	r = si_compile_llvm(sscreen, &shader->binary, &shader->config, tm,
-- 
2.16.2