Previously we left the size of this vgrf as 1, which caused register allocation to be subtly broken. If we were lucky we would explode in the post-alloc instruction scheduler; if we were unlucky we'd just stomp on someone else and get broken rendering.
Fixes crash when running `tesseract` with the following settings: msaa 4 glineardepth 0 Also fixes the piglit test: arb_sample_shading-builtin-gl-sample-id Signed-off-by: Chris Forbes <chr...@ijw.co.nz> Cc: Anuj Phogat <anuj.pho...@gmail.com> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=72859 --- src/mesa/drivers/dri/i965/brw_fs_visitor.cpp | 1 + 1 file changed, 1 insertion(+) diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp index 8e516a5..53cd0a1 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp @@ -1549,6 +1549,7 @@ fs_visitor::emit_mcs_fetch(ir_texture *ir, fs_reg coordinate, int sampler) } fs_inst *inst = emit(SHADER_OPCODE_TXF_MCS, dest, payload); + virtual_grf_sizes[payload.reg] = next.reg_offset; inst->base_mrf = -1; inst->mlen = next.reg_offset * reg_width; inst->header_present = false; -- 1.8.5.2 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
