Add SPIRV atomics intrinsics and fix buffer layout lowering. (#3170)

* Fix atomics intrinsics and buffer layout lowering.

* Fix.

* Add more test.

* Fix.

---------

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

1 files changed, 8 insertions, 2 deletions

diff --git a/source/slang/slang-ir-specialize-target-switch.cpp b/source/slang/slang-ir-specialize-target-switch.cpp
index 2593389b1..2be7c8194 100644
--- a/source/slang/slang-ir-specialize-target-switch.cpp
+++ b/source/slang/slang-ir-specialize-target-switch.cpp
@@ -30,10 +30,16 @@ namespace Slang
                         bestCapSet = capSet;
                     }
                 }
-                SLANG_ASSERT(targetBlock);
                 IRBuilder builder(targetSwitch);
                 builder.setInsertBefore(targetSwitch);
-                builder.emitBranch(targetBlock);
+                if (targetBlock)
+                {
+                    builder.emitBranch(targetBlock);
+                }
+                else
+                {
+                    builder.emitMissingReturn();
+                }
                 targetSwitch->removeAndDeallocate();
                 changed = true;
             }