From 1e0908bd7107dfbdac912b693c3ab9bd6e1dc8b3 Mon Sep 17 00:00:00 2001
From: 16-Bit-Dog <67922228+16-Bit-Dog@users.noreply.github.com>
Date: Fri, 10 Oct 2025 13:09:24 -0400
Subject: Addition of `Load`/`Store` coherent operations (#8395)

Fixes: https://github.com/shader-slang/slang/issues/7634
Duplicate of PR https://github.com/shader-slang/slang/pull/8052

Primary Changes:
* Added `storeCoherent` and `loadCoherent` for coherent load/store via
pointers. This is backed by `IRMemoryScopeAttr` which is an `IRAttr`
attached to `IRLoad` and `IRStore`
* Logic in `source\slang\slang-emit-spirv.cpp` for load/store emitting
has been reworked to be less messy and more maintainable
* Add to `hlsl.meta.slang` coop vector and coop matrix coherent
load/store operations

Secondary Changes:
* Added a missing load/store test for coop matrix:
`tests\cooperative-matrix\load-store-pointer.slang`

---------

Co-authored-by: ArielG-NV <aglasroth@nvidia.com>
Co-authored-by: ArielG-NV <159081215+ArielG-NV@users.noreply.github.com>
Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>
Co-authored-by: Nathan V. Morrical <natemorrical@gmail.com>
---
 tests/cooperative-matrix/load-store-pointer.slang | 35 +++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 tests/cooperative-matrix/load-store-pointer.slang

(limited to 'tests/cooperative-matrix/load-store-pointer.slang')

diff --git a/tests/cooperative-matrix/load-store-pointer.slang b/tests/cooperative-matrix/load-store-pointer.slang
new file mode 100644
index 000000000..2bbd8fef1
--- /dev/null
+++ b/tests/cooperative-matrix/load-store-pointer.slang
@@ -0,0 +1,35 @@
+//TEST:SIMPLE(filecheck=SPIRV):-stage compute -entry computeMain -target spirv
+//TEST(compute):COMPARE_COMPUTE(filecheck-buffer=CHECK):-vk -output-using-type -emit-spirv-directly
+
+// Ensure SPIRV does not do coherent operations here
+// SPIRV-NOT: MakePointerAvailable
+// SPIRV-NOT: MakePointerVisible
+
+
+// CHECK: 1
+// CHECK-NEXT: 2
+// CHECK-NEXT: 3
+// CHECK-NEXT: 4
+// CHECK-NEXT: 5
+// CHECK-NEXT: 6
+// CHECK-NEXT: 7
+// CHECK-NEXT: 8
+
+//TEST_INPUT:ubuffer(data=[1 2 3 4 5 6 7 8], stride=4, count=256):name=inputBuffer
+uniform int32_t* inputBuffer;
+
+//TEST_INPUT:ubuffer(stride=4, count=256):out,name=outputBuffer
+uniform int32_t* outputBuffer;
+
+using namespace linalg;
+
+[numthreads(32, 1, 1)]
+void computeMain()
+{
+    int32_t* ptrIn = inputBuffer;
+    int32_t* ptrOut = outputBuffer;
+
+    let stride = 16;
+    let mat = coopMatLoad<int32_t, MemoryScope.Subgroup, 16, 16, CoopMatMatrixUse.MatrixAccumulator, CoopMatMatrixLayout.RowMajor>(ptrIn, 0, stride);
+    mat.Store<CoopMatMatrixLayout.RowMajor>(ptrOut, 0, 16);
+}
\ No newline at end of file
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