r600g/llvm: Fix alpha_to_one piglit tests

Reviewed-by: Tom Stellard <thomas.stellard at amd.com>

diff --git a/src/gallium/drivers/r600/r600_llvm.c b/src/gallium/drivers/r600/r600_llvm.c
index 7a41688..59047e7 100644 (file)
--- a/src/gallium/drivers/r600/r600_llvm.c
+++ b/src/gallium/drivers/r600/r600_llvm.c
@@ -234,6 +234,8 @@ static void llvm_emit_epilogue(struct lp_build_tgsi_context * bld_base)
                        elements[chan] = LLVMBuildLoad(base->gallivm->builder,
                                ctx->soa.outputs[i][chan], "");
                }
+               if (ctx->alpha_to_one && ctx->type == TGSI_PROCESSOR_FRAGMENT && ctx->r600_outputs[i].name == TGSI_SEMANTIC_COLOR)
+                       elements[3] = lp_build_const_float(base->gallivm, 1.0f);
                LLVMValueRef output = lp_build_gather_values(base->gallivm, elements, 4);
 
                if (ctx->type == TGSI_PROCESSOR_VERTEX) {

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index 59a7f92..8642463 100644 (file)
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -1428,6 +1428,7 @@ static int r600_shader_from_tgsi(struct r600_screen *rscreen,
                radeon_llvm_ctx.fs_color_all = shader->fs_write_all && (rscreen->chip_class >= EVERGREEN);
                radeon_llvm_ctx.stream_outputs = &so;
                radeon_llvm_ctx.clip_vertex = ctx.cv_output;
+               radeon_llvm_ctx.alpha_to_one = key.alpha_to_one;
                mod = r600_tgsi_llvm(&radeon_llvm_ctx, tokens);
                if (debug_get_bool_option("R600_DUMP_SHADERS", FALSE)) {
                        dump = 1;

diff --git a/src/gallium/drivers/radeon/radeon_llvm.h b/src/gallium/drivers/radeon/radeon_llvm.h
index 21360e2..bfeacb5 100644 (file)
--- a/src/gallium/drivers/radeon/radeon_llvm.h
+++ b/src/gallium/drivers/radeon/radeon_llvm.h
@@ -64,6 +64,7 @@ struct radeon_llvm_context {
        struct pipe_stream_output_info *stream_outputs;
        unsigned color_buffer_count;
        unsigned fs_color_all;
+       unsigned alpha_to_one;
 
        /*=== Front end configuration ===*/