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, 7 insertions, 2 deletions

diff --git a/source/slang/slang-ir-sccp.cpp b/source/slang/slang-ir-sccp.cpp
index ce635dca8..5ae858256 100644
--- a/source/slang/slang-ir-sccp.cpp
+++ b/source/slang/slang-ir-sccp.cpp
@@ -1192,7 +1192,13 @@ struct SCCPContext
                 }
                 cfgWorkList.add(switchInst->getDefaultLabel());
             }
-
+            else if (auto targetSwitch = as<IRTargetSwitch>(inst))
+            {
+                for (UInt cc = 0; cc < targetSwitch->getCaseCount(); ++cc)
+                {
+                    cfgWorkList.add(targetSwitch->getCaseBlock(cc));
+                }
+            }
             // There are other cases of terminator instructions not handled
             // above (e.g., `return` instructions), but these can't cause
             // additional basic blocks in the CFG to execute, so we don't
@@ -1555,7 +1561,6 @@ struct SCCPContext
                     terminator->removeAndDeallocate();
                     changed = true;
                 }
-            
             }
         }