r300: recalculate used inputs and outputs after dead code removal

diff --git a/src/mesa/drivers/dri/r300/radeon_nqssadce.c b/src/mesa/drivers/dri/r300/radeon_nqssadce.c
index 4a2e1cba402b9a845937fa087e4b68f024a888ea..d2591fa1bd2e9d462df9943bd07abea3695fb9e7 100644 (file)
--- a/src/mesa/drivers/dri/r300/radeon_nqssadce.c
+++ b/src/mesa/drivers/dri/r300/radeon_nqssadce.c
@@ -264,6 +264,32 @@ static void process_instruction(struct nqssadce_state* s)
        }
 }
 
+static void calculateInputsOutputs(struct gl_program *p)
+{
+       struct prog_instruction *inst;
+       int i, tmp;
+       GLuint InputsRead, OutputsWritten;
+
+       inst = p->Instructions;
+       InputsRead = 0;
+       OutputsWritten = 0;
+       while (inst->Opcode != OPCODE_END)
+       {
+               tmp = _mesa_num_inst_src_regs(inst->Opcode);
+               for (i = 0; i < tmp; ++i) {
+                       if (inst->SrcReg[i].File == PROGRAM_INPUT)
+                               InputsRead |= 1 << inst->SrcReg[i].Index;
+               }
+
+               if (inst->DstReg.File == PROGRAM_OUTPUT)
+                       OutputsWritten |= 1 << inst->DstReg.Index;
+
+               ++inst;
+       }
+
+       p->InputsRead = InputsRead;
+       p->OutputsWritten = OutputsWritten;
+}
 
 void radeonNqssaDce(GLcontext *ctx, struct gl_program *p, struct radeon_nqssadce_descr* descr)
 {
@@ -280,4 +306,6 @@ void radeonNqssaDce(GLcontext *ctx, struct gl_program *p, struct radeon_nqssadce
                s.IP--;
                process_instruction(&s);
        }
+
+       calculateInputsOutputs(p);
 }