Feature/glslang spirv version (#1256)

* WIP add support for __spirv_version .

* Added IRRequireSPIRVVersionDecoration

* SPIR-V version passed to glslang.
Enable VK wave tests.
Split ExtensionTracker out, so can be cast and used externally to emit.
Added SourceResult.

* Fix warning on Clang.

* Missing hlsl.meta.h

* Refactor communication/parsing of __spirv_version with glslang.

* Fix some debug typos.
Be more precise in handling of substring handling.

* Make glslang forwards and backwards binary compatible.

* Small comment improvements.

* Added slang-spirv-target-info.h/cpp

* Fix for major/minor on gcc.

* Another fix for gcc/clang.

* VS projects include slang-spirv-target-info.h/cpp

* Removed SPIRVTargetInfo
Added SemanticVersion.
Don't bother with passing a target to glslang. Should be separate from 'version'.

* Renamed slang-emit-glsl-extension-tracker.cpp/.h -> slang-glsl-extension-tracker.cpp/.h
Fixed some VS project issues.

* Fix a comment.

* Added slang-semantic-version.cpp/.h

* Added slang-glsl-extension-tracker.cpp/.h

* Added split that can check for input has all been parsed.

* Fix problem on x86 win build.

1 files changed, 17 insertions, 0 deletions

diff --git a/source/core/slang-string-slice-pool.cpp b/source/core/slang-string-slice-pool.cpp
index be7bec785..24187ba5c 100644
--- a/source/core/slang-string-slice-pool.cpp
+++ b/source/core/slang-string-slice-pool.cpp
@@ -59,6 +59,23 @@ StringSlicePool::Handle StringSlicePool::add(const Slice& slice)
     return Handle(index);
 }
 
+bool StringSlicePool::findOrAdd(const Slice& slice, Handle& outHandle)
+{
+    Handle newHandle = Handle(m_slices.getCount());
+    const Handle* handlePtr = m_map.TryGetValueOrAdd(slice, newHandle);
+    if (handlePtr)
+    {
+        outHandle = *handlePtr;
+        return true;
+    }
+
+    // Need to add
+    UnownedStringSlice scopeSlice(m_arena.allocateString(slice.begin(), slice.getLength()), slice.getLength());
+    m_slices.add(scopeSlice);
+    outHandle = newHandle;
+    return false;
+}
+
 StringSlicePool::Handle StringSlicePool::add(StringRepresentation* stringRep)
 {
     if (stringRep == nullptr && m_style == Style::Default)