Add `target_switch` and `intrinsic_asm` statement. (#3154)

* Add `target_switch` and `__intrinsic_asm` statement.

* Cleanup.

* WaveGetActiveMask, WaveGetActiveMask, WaveCountBits.

* WaveIsFirstLane.

* More wave intrinsics.

* wave intrinsics.

* merge fix.

* Fix.

* Fix.

* Update test.

* update test.

* Fix.

---------

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/source/slang/slang-check-stmt.cpp b/source/slang/slang-check-stmt.cpp
index 4b4257f75..bbe3e51bd 100644
--- a/source/slang/slang-check-stmt.cpp
+++ b/source/slang/slang-check-stmt.cpp
@@ -264,6 +264,26 @@ namespace Slang
         stmt->parentStmt = switchStmt;
     }
 
+    void SemanticsStmtVisitor::visitTargetSwitchStmt(TargetSwitchStmt* stmt)
+    {
+        WithOuterStmt subContext(this, stmt);
+
+        for (auto caseStmt : stmt->targetCases)
+            subContext.checkStmt(caseStmt);
+    }
+
+    void SemanticsStmtVisitor::visitTargetCaseStmt(TargetCaseStmt* stmt)
+    {
+        auto switchStmt = FindOuterStmt<TargetSwitchStmt>();
+
+        if (!switchStmt)
+        {
+            getSink()->diagnose(stmt, Diagnostics::caseOutsideSwitch);
+        }
+        WithOuterStmt subContext(this, stmt);
+        subContext.checkStmt(stmt->body);
+    }
+
     void SemanticsStmtVisitor::visitDefaultStmt(DefaultStmt* stmt)
     {
         auto switchStmt = FindOuterStmt<SwitchStmt>();