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radv: move ac_build_if_state on top of radv_nir_to_llvm.c

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These helpers will be needed for future work.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
This commit is contained in:
Samuel Pitoiset
2018-05-11 09:37:11 +02:00
parent 3a410f0afc
commit efc10949cc
1 changed files with 92 additions and 91 deletions
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183
src/amd/vulkan/radv_nir_to_llvm.c
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@@ -124,6 +124,98 @@ radv_shader_context_from_abi(struct ac_shader_abi *abi)
return container_of(abi, ctx, abi); return container_of(abi, ctx, abi);
} }
struct ac_build_if_state
{
struct radv_shader_context *ctx;
LLVMValueRef condition;
LLVMBasicBlockRef entry_block;
LLVMBasicBlockRef true_block;
LLVMBasicBlockRef false_block;
LLVMBasicBlockRef merge_block;
};
static LLVMBasicBlockRef
ac_build_insert_new_block(struct radv_shader_context *ctx, const char *name)
{
LLVMBasicBlockRef current_block;
LLVMBasicBlockRef next_block;
LLVMBasicBlockRef new_block;
/* get current basic block */
current_block = LLVMGetInsertBlock(ctx->ac.builder);
/* chqeck if there's another block after this one */
next_block = LLVMGetNextBasicBlock(current_block);
if (next_block) {
/* insert the new block before the next block */
new_block = LLVMInsertBasicBlockInContext(ctx->context, next_block, name);
}
else {
/* append new block after current block */
LLVMValueRef function = LLVMGetBasicBlockParent(current_block);
new_block = LLVMAppendBasicBlockInContext(ctx->context, function, name);
}
return new_block;
}
static void
ac_nir_build_if(struct ac_build_if_state *ifthen,
struct radv_shader_context *ctx,
LLVMValueRef condition)
{
LLVMBasicBlockRef block = LLVMGetInsertBlock(ctx->ac.builder);
memset(ifthen, 0, sizeof *ifthen);
ifthen->ctx = ctx;
ifthen->condition = condition;
ifthen->entry_block = block;
/* create endif/merge basic block for the phi functions */
ifthen->merge_block = ac_build_insert_new_block(ctx, "endif-block");
/* create/insert true_block before merge_block */
ifthen->true_block =
LLVMInsertBasicBlockInContext(ctx->context,
ifthen->merge_block,
"if-true-block");
/* successive code goes into the true block */
LLVMPositionBuilderAtEnd(ctx->ac.builder, ifthen->true_block);
}
/**
* End a conditional.
*/
static void
ac_nir_build_endif(struct ac_build_if_state *ifthen)
{
LLVMBuilderRef builder = ifthen->ctx->ac.builder;
/* Insert branch to the merge block from current block */
LLVMBuildBr(builder, ifthen->merge_block);
/*
* Now patch in the various branch instructions.
*/
/* Insert the conditional branch instruction at the end of entry_block */
LLVMPositionBuilderAtEnd(builder, ifthen->entry_block);
if (ifthen->false_block) {
/* we have an else clause */
LLVMBuildCondBr(builder, ifthen->condition,
ifthen->true_block, ifthen->false_block);
}
else {
/* no else clause */
LLVMBuildCondBr(builder, ifthen->condition,
ifthen->true_block, ifthen->merge_block);
}
/* Resume building code at end of the ifthen->merge_block */
LLVMPositionBuilderAtEnd(builder, ifthen->merge_block);
}
static LLVMValueRef get_rel_patch_id(struct radv_shader_context *ctx) static LLVMValueRef get_rel_patch_id(struct radv_shader_context *ctx)
{ {
switch (ctx->stage) { switch (ctx->stage) {
@@ -2502,97 +2594,6 @@ handle_ls_outputs_post(struct radv_shader_context *ctx)
} }
} }
struct ac_build_if_state
{
struct radv_shader_context *ctx;
LLVMValueRef condition;
LLVMBasicBlockRef entry_block;
LLVMBasicBlockRef true_block;
LLVMBasicBlockRef false_block;
LLVMBasicBlockRef merge_block;
};
static LLVMBasicBlockRef
ac_build_insert_new_block(struct radv_shader_context *ctx, const char *name)
{
LLVMBasicBlockRef current_block;
LLVMBasicBlockRef next_block;
LLVMBasicBlockRef new_block;
/* get current basic block */
current_block = LLVMGetInsertBlock(ctx->ac.builder);
/* check if there's another block after this one */
next_block = LLVMGetNextBasicBlock(current_block);
if (next_block) {
/* insert the new block before the next block */
new_block = LLVMInsertBasicBlockInContext(ctx->context, next_block, name);
}
else {
/* append new block after current block */
LLVMValueRef function = LLVMGetBasicBlockParent(current_block);
new_block = LLVMAppendBasicBlockInContext(ctx->context, function, name);
}
return new_block;
}
static void
ac_nir_build_if(struct ac_build_if_state *ifthen,
struct radv_shader_context *ctx,
LLVMValueRef condition)
{
LLVMBasicBlockRef block = LLVMGetInsertBlock(ctx->ac.builder);
memset(ifthen, 0, sizeof *ifthen);
ifthen->ctx = ctx;
ifthen->condition = condition;
ifthen->entry_block = block;
/* create endif/merge basic block for the phi functions */
ifthen->merge_block = ac_build_insert_new_block(ctx, "endif-block");
/* create/insert true_block before merge_block */
ifthen->true_block =
LLVMInsertBasicBlockInContext(ctx->context,
ifthen->merge_block,
"if-true-block");
/* successive code goes into the true block */
LLVMPositionBuilderAtEnd(ctx->ac.builder, ifthen->true_block);
}
/**
* End a conditional.
*/
static void
ac_nir_build_endif(struct ac_build_if_state *ifthen)
{
LLVMBuilderRef builder = ifthen->ctx->ac.builder;
/* Insert branch to the merge block from current block */
LLVMBuildBr(builder, ifthen->merge_block);
/*
* Now patch in the various branch instructions.
*/
/* Insert the conditional branch instruction at the end of entry_block */
LLVMPositionBuilderAtEnd(builder, ifthen->entry_block);
if (ifthen->false_block) {
/* we have an else clause */
LLVMBuildCondBr(builder, ifthen->condition,
ifthen->true_block, ifthen->false_block);
}
else {
/* no else clause */
LLVMBuildCondBr(builder, ifthen->condition,
ifthen->true_block, ifthen->merge_block);
}
/* Resume building code at end of the ifthen->merge_block */
LLVMPositionBuilderAtEnd(builder, ifthen->merge_block);
}
static void static void
write_tess_factors(struct radv_shader_context *ctx) write_tess_factors(struct radv_shader_context *ctx)
{ {