diff options
Diffstat (limited to 'src/gallium/auxiliary/draw/draw_llvm.c')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_llvm.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/src/gallium/auxiliary/draw/draw_llvm.c b/src/gallium/auxiliary/draw/draw_llvm.c index 27383221b9b..3b2df054c3c 100644 --- a/src/gallium/auxiliary/draw/draw_llvm.c +++ b/src/gallium/auxiliary/draw/draw_llvm.c @@ -713,10 +713,12 @@ draw_llvm_generate_elts(struct draw_llvm *llvm, struct draw_llvm_variant *varian struct draw_context *draw = llvm->draw; unsigned i, j; struct lp_build_context bld; + struct lp_build_context bld_int; struct lp_build_loop_state lp_loop; struct lp_type vs_type = lp_type_float_vec(32); const int max_vertices = 4; LLVMValueRef outputs[PIPE_MAX_SHADER_OUTPUTS][NUM_CHANNELS]; + LLVMValueRef fetch_max; arg_types[0] = llvm->context_ptr_type; /* context */ arg_types[1] = llvm->vertex_header_ptr_type; /* vertex_header */ @@ -759,9 +761,14 @@ draw_llvm_generate_elts(struct draw_llvm *llvm, struct draw_llvm_variant *varian LLVMPositionBuilderAtEnd(builder, block); lp_build_context_init(&bld, builder, vs_type); + lp_build_context_init(&bld_int, builder, lp_type_int(32)); step = LLVMConstInt(LLVMInt32Type(), max_vertices, 0); + fetch_max = LLVMBuildSub(builder, fetch_count, + LLVMConstInt(LLVMInt32Type(), 1, 0), + "fetch_max"); + lp_build_loop_begin(builder, LLVMConstInt(LLVMInt32Type(), 0, 0), &lp_loop); { LLVMValueRef inputs[PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS]; @@ -780,8 +787,15 @@ draw_llvm_generate_elts(struct draw_llvm *llvm, struct draw_llvm_variant *varian builder, lp_loop.counter, LLVMConstInt(LLVMInt32Type(), i, 0), ""); - LLVMValueRef fetch_ptr = LLVMBuildGEP(builder, fetch_elts, - &true_index, 1, ""); + LLVMValueRef fetch_ptr; + + /* make sure we're not out of bounds which can happen + * if fetch_count % 4 != 0, because on the last iteration + * a few of the 4 vertex fetches will be out of bounds */ + true_index = lp_build_min(&bld_int, true_index, fetch_max); + + fetch_ptr = LLVMBuildGEP(builder, fetch_elts, + &true_index, 1, ""); true_index = LLVMBuildLoad(builder, fetch_ptr, "fetch_elt"); for (j = 0; j < draw->pt.nr_vertex_elements; ++j) { struct pipe_vertex_element *velem = &draw->pt.vertex_element[j]; |