r600: Assert pointer is not null before dereferencing.

diff --git a/src/mesa/drivers/dri/r600/r700_assembler.c b/src/mesa/drivers/dri/r600/r700_assembler.c
index 8344dd9..834bcc6 100644 (file)
--- a/src/mesa/drivers/dri/r600/r700_assembler.c
+++ b/src/mesa/drivers/dri/r600/r700_assembler.c
@@ -1746,18 +1746,21 @@ GLboolean assemble_alu_src(R700ALUInstruction*  alu_instruction_ptr,
     switch (source_index) 
     {
         case 0:
+            assert(alu_instruction_ptr);
             alu_instruction_ptr->m_Word0.f.src0_sel  = src_sel;
             alu_instruction_ptr->m_Word0.f.src0_rel  = src_rel;
             alu_instruction_ptr->m_Word0.f.src0_chan = src_chan;
             alu_instruction_ptr->m_Word0.f.src0_neg  = src_neg;
             break;
         case 1:
+            assert(alu_instruction_ptr);
             alu_instruction_ptr->m_Word0.f.src1_sel  = src_sel;
             alu_instruction_ptr->m_Word0.f.src1_rel  = src_rel;
             alu_instruction_ptr->m_Word0.f.src1_chan = src_chan;
             alu_instruction_ptr->m_Word0.f.src1_neg  = src_neg;
             break;
         case 2:
+            assert(alu_instruction_ptr);
             alu_instruction_ptr->m_Word1_OP3.f.src2_sel  = src_sel;
             alu_instruction_ptr->m_Word1_OP3.f.src2_rel  = src_rel;
             alu_instruction_ptr->m_Word1_OP3.f.src2_chan = src_chan;