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i965/fs: Don't rely on the default builder to create a null register in emit_spill. 

It's not guaranteed to have the same width as the instruction
generating the spilled variable.

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
This commit is contained in:
Francisco Jerez 2015-07-27 20:14:41 +03:00
parent bfad71606a
commit a0b192d3d9
1 changed files with 1 additions and 1 deletions
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2
src/mesa/drivers/dri/i965/brw_fs_reg_allocate.cpp
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@ -738,7 +738,7 @@ fs_visitor::emit_spill(bblock_t *block, fs_inst *inst, fs_reg src,
for (int i = 0; i < count / reg_size; i++) {
fs_inst *spill_inst =
ibld.emit(SHADER_OPCODE_GEN4_SCRATCH_WRITE, bld.null_reg_f(), src);
ibld.emit(SHADER_OPCODE_GEN4_SCRATCH_WRITE, ibld.null_reg_f(), src);
src.reg_offset += reg_size;
spill_inst->offset = spill_offset + i * reg_size * REG_SIZE;
spill_inst->mlen = 1 + reg_size; /* header, value */