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transform/spirv: Use InlinePointerLets & Simplify

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arrayLength() will take a pointer to a storage buffer array.
This pointer may pass through function scoped let statements.
To make this intrinsic easier to generate, inline the pointer lets and
remove chains of &*&*.

Bug: tint:806
Change-Id: Ib2c79a9c38cba7391cbb4313986af9a72b0f0435
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/54060
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: Ben Clayton <bclayton@chromium.org>
This commit is contained in:
Ben Clayton
2021-06-10 17:34:44 +00:00
committed by Tint LUCI CQ
parent 3e59eb0e5c
commit 0aa7edbbd5
15 changed files with 2392 additions and 1903 deletions
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6
test/ptr_ref/load/local/ptr_function.wgsl.expected.spvasm
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@@ -1,7 +1,7 @@
; SPIR-V
; Version: 1.3
; Generator: Google Tint Compiler; 0
; Bound: 15
; Bound: 13
; Schema: 0
OpCapability Shader
OpMemoryModel Logical GLSL450
@@ -20,7 +20,7 @@
%4 = OpLabel
%i = OpVariable %_ptr_Function_int Function %9
OpStore %i %int_123
%12 = OpLoad %int %i
%14 = OpIAdd %int %12 %int_1
%10 = OpLoad %int %i
%12 = OpIAdd %int %10 %int_1
OpReturn
OpFunctionEnd