Inline functions with string param/return for GPU targets (#2544)

* #include an absolute path didn't work - because paths were taken to always be relative.

* WIP inlining of functions that take or return string related types on GPU targets.

* Small fixes.

* Added a test.

* Add checking for any getStringHash insts are valid.

* Support getStringHash on CUDA.

* Tweak diagnostic.

1 files changed, 28 insertions, 0 deletions

diff --git a/source/slang/slang-ir-string-hash.cpp b/source/slang/slang-ir-string-hash.cpp
index 8ff0ec756..8bccb97db 100644
--- a/source/slang/slang-ir-string-hash.cpp
+++ b/source/slang/slang-ir-string-hash.cpp
@@ -18,6 +18,11 @@ static void _findGetStringHashRec(IRInst* inst, List<IRGetStringHash*>& outInsts
     }
 }
 
+void findGetStringHashInsts(IRModule* module, List<IRGetStringHash*>& outInsts)
+{
+    _findGetStringHashRec(module->getModuleInst(), outInsts);
+}
+
 void findGlobalHashedStringLiterals(IRModule* module, StringSlicePool& pool)
 {
     IRModuleInst* moduleInst = module->getModuleInst();
@@ -78,4 +83,27 @@ void addGlobalHashedStringLiterals(const StringSlicePool& pool, SharedIRBuilder&
     builder.addKeepAliveDecoration(globalHashedInst);
 }
 
+Result checkGetStringHashInsts(IRModule* module, DiagnosticSink* sink)
+{
+    // Check all getStringHash are all on string literals
+    List<IRGetStringHash*> insts;
+    findGetStringHashInsts(module, insts);
+
+    for (auto inst : insts)
+    {
+        if (inst->getStringLit() == nullptr)
+        {
+            if (sink)
+            {
+                sink->diagnose(inst, Diagnostics::getStringHashMustBeOnStringLiteral);
+            }
+
+            // Doesn't access a string literal
+            return SLANG_FAIL;
+        }
+    }
+    
+    return SLANG_OK;
+}
+
 }