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transform: Add NumWorkgroupsFromUniform transform

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This transform scans entry points for struct parameters that contain
the num_workgroups builtin, and replace accesses to these members with
a value loaded from a uniform buffer.

This will be used by the HLSL backend to implement the num_workgroups
builtin.

Bug: tint:752
Change-Id: Iefab3b14af8a08a6135348fded368a06d932e915
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/63961
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
This commit is contained in:
James Price
2021-09-13 17:11:58 +00:00
parent 1bb637195b
commit 77a25c060f
6 changed files with 596 additions and 7 deletions
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test/BUILD.gn
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@@ -302,6 +302,7 @@ tint_unittests_source_set("tint_unittests_core_src") {
"../src/transform/inline_pointer_lets_test.cc",
"../src/transform/loop_to_for_loop_test.cc",
"../src/transform/module_scope_var_to_entry_point_param_test.cc",
"../src/transform/num_workgroups_from_uniform_test.cc",
"../src/transform/pad_array_elements_test.cc",
"../src/transform/promote_initializers_to_const_var_test.cc",
"../src/transform/renamer_test.cc",