commit 1a912a550f34683e731b8f3ef36a15bb38398ae3
author Rhys Perry <pendingchaos02@gmail.com> Tue Sep 01 16:30:34 2020 +0100
committer Marge Bot <eric+marge@anholt.net> Tue Oct 13 12:47:20 2020 +0000
tree a463ebd56d4eeef44cad9d624a4db9bbc9776409
parent 8850a63161ab58d89c534a1069cda845bf69ecc8

nir: add last_invocation intrinsic

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6558>

src/compiler/nir/nir_divergence_analysis.c

diff --git a/src/compiler/nir/nir_divergence_analysis.c b/src/compiler/nir/nir_divergence_analysis.c
index 6a5225d..4996c2e 100644
--- a/src/compiler/nir/nir_divergence_analysis.c
+++ b/src/compiler/nir/nir_divergence_analysis.c
@@ -112,6 +112,7 @@
    case nir_intrinsic_load_subgroup_le_mask:
    case nir_intrinsic_load_subgroup_lt_mask:
    case nir_intrinsic_first_invocation:
+   case nir_intrinsic_last_invocation:
    case nir_intrinsic_load_base_instance:
    case nir_intrinsic_load_base_vertex:
    case nir_intrinsic_load_first_vertex:

src/compiler/nir/nir_intrinsics.py

diff --git a/src/compiler/nir/nir_intrinsics.py b/src/compiler/nir/nir_intrinsics.py
index deafdb0..f7e51c6 100644
--- a/src/compiler/nir/nir_intrinsics.py
+++ b/src/compiler/nir/nir_intrinsics.py
@@ -266,10 +266,11 @@
 #
 # These correspond to the SPIR-V opcodes
 #
-#    OpGroupUniformElect
+#    OpGroupNonUniformElect
 #    OpSubgroupFirstInvocationKHR
 intrinsic("elect", dest_comp=1, flags=[CAN_ELIMINATE])
 intrinsic("first_invocation", dest_comp=1, flags=[CAN_ELIMINATE])
+intrinsic("last_invocation", dest_comp=1, flags=[CAN_ELIMINATE])
 
 # Memory barrier with semantics analogous to the compute shader
 # groupMemoryBarrier(), memoryBarrierAtomicCounter(), memoryBarrierBuffer(),