st/glsl_to_tgsi: fix indirect access to 64-bit integer

Make sure we actually allocate two adjacent TGSI temporaries. The
current code fails e.g. when an arithmetic operation has two
operands with indirect accesses.

I will send out a new piglit test
(arb_gpu_shader_int64/execution/indirect-array-two-accesses.shader_test)

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

src/mesa/state_tracker/st_glsl_to_tgsi.cpp

@@ -1269,7 +1269,7 @@ glsl_to_tgsi_visitor::reladdr_to_temp(ir_instruction *ir,
    if (reg->reladdr2) emit_arl(ir, address_reg2, *reg->reladdr2);
 
    if (*num_reladdr != 1) {
-      st_src_reg temp = get_temp(reg->type == GLSL_TYPE_DOUBLE ? glsl_type::dvec4_type : glsl_type::vec4_type);
+      st_src_reg temp = get_temp(glsl_type::get_instance(reg->type, 4, 1));
 
       emit_asm(ir, TGSI_OPCODE_MOV, st_dst_reg(temp), *reg);
       *reg = temp;