i965/vec4: fix register allocation for 64-bit undef sources

Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>

diff --git a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
index 67b6b32cfded1d0baec1c5da2efad2f4f32430d7..3611f8c73237903bed28ce4f1ae4606e457b5880 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
@@ -2080,7 +2080,8 @@ vec4_visitor::nir_emit_texture(nir_tex_instr *instr)
 void
 vec4_visitor::nir_emit_undef(nir_ssa_undef_instr *instr)
 {
-   nir_ssa_values[instr->def.index] = dst_reg(VGRF, alloc.allocate(1));
+   nir_ssa_values[instr->def.index] =
+      dst_reg(VGRF, alloc.allocate(DIV_ROUND_UP(instr->def.bit_size, 32)));
 }
 
 }