parser: Initialize unused instruction source registers
The 965 driver expects unused source registers (e.g., SrcReg[2] of a
DP3 instruction) to have a register file of PROGRAM_UNDEFINED.
Initializing these source registers ensures that this happens.
diff --git a/src/mesa/shader/program_parse.y b/src/mesa/shader/program_parse.y
index 0260196..fe9022b 100644
--- a/src/mesa/shader/program_parse.y
+++ b/src/mesa/shader/program_parse.y
@@ -1774,11 +1774,15 @@
if (src1 != NULL) {
inst->Base.SrcReg[1] = src1->Base;
inst->SrcReg[1] = *src1;
+ } else {
+ init_src_reg(& inst->SrcReg[1]);
}
if (src2 != NULL) {
inst->Base.SrcReg[2] = src2->Base;
inst->SrcReg[2] = *src2;
+ } else {
+ init_src_reg(& inst->SrcReg[2]);
}
}