Commit graph

2 commits

Author SHA1 Message Date
Jason Ekstrand
cd6f736c07 nir/conditional_if: Properly use the builder
We were passing around a void *mem_ctx and using that to initialize the
builder which was wrong since that pointed to ralloc_parent(impl) which
is the shader but the builder is supposed to be initialized with the
nir_function_impl.

Reviewed-by: Eduardo Lima Mitev <elima@igalia.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
2016-12-30 12:38:04 -08:00
Dave Airlie
b16dff2d88 nir: add conditional discard optimisation (v4)
This is ported from GLSL and converts

if (cond)
	discard;

into
discard_if(cond);

This removes a block, but also is needed by radv
to workaround a bug in the LLVM backend.

v2: handle if (a) discard_if(b) (nha)
cleanup and drop pointless loop (Matt)
make sure there are no dependent phis (Eric)
v3: make sure only one instruction in the then block.
v4: remove sneaky tabs, add cursor init (Eric)

Reviewed-by: Eric Anholt <eric@anholt.net>
Cc: "13.0" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2016-11-10 05:46:33 +10:00