getStringHash on string literals (#1140)

* WIP getStringHash

* Have a use.

* Add slang-string-hash.h/.cpp

* Use StringSlicePool for holding strings for StringHash.
Add outputBuffer to string-literal-hash.slang so value can be tested.
Ignore the GlobalHashedStringLiterals instruction on emit.

* Add all the hashed string literals to ProgramLayout.

* Add reflection support for hashed string literals to reflection test.

* Fix string literal hash test.

* Small fixes to pass test suite.

* Fix issue in serialization where IRUse is not correctly initialized.

* Fix problem initializing IRUse for string hash pass.
Remove hack from slang-ir-specialize - specially handling if user is not null.

* * Use shared builder when replacing getStringHash
* Comments for functions in slang-ir-string-hash
* Do not allow zero length string literals. Could be allowed, but doing so would require StringSlicePool to have a special case (or some other mechanism)

1 files changed, 10 insertions, 0 deletions

diff --git a/source/slang/slang-emit-c-like.cpp b/source/slang/slang-emit-c-like.cpp
index bf7dd3129..2c1bcbe6d 100644
--- a/source/slang/slang-emit-c-like.cpp
+++ b/source/slang/slang-emit-c-like.cpp
@@ -1650,6 +1650,11 @@ void CLikeSourceEmitter::defaultEmitInstExpr(IRInst* inst, const EmitOpInfo& inO
     bool needClose = false;
     switch(inst->op)
     {
+    case kIROp_GlobalHashedStringLiterals:
+        /* Don't need to to output anything for this instruction - it's used for reflecting string literals that
+        are hashed with 'getStringHash' */
+        break;
+
     case kIROp_IntLit:
     case kIROp_FloatLit:
     case kIROp_BoolLit:
@@ -3033,6 +3038,11 @@ void CLikeSourceEmitter::emitGlobalInst(IRInst* inst)
 
     switch(inst->op)
     {
+    case kIROp_GlobalHashedStringLiterals:
+        /* Don't need to to output anything for this instruction - it's used for reflecting string literals that
+        are hashed with 'getStringHash' */
+        break;
+
     case kIROp_Func:
         emitFunc((IRFunc*) inst);
         break;