[WebAssembly] remove instruction after builtin trap (#90207)

`llvm.trap` will be convert as `unreachable` which is terminator.
Instruction after terminator will cause validation failed.
This PR introduces a pass to clean instruction after terminator.
Fixes: #68770.

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
index cdd39eeb6bbb..de342e896573 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
@@ -512,6 +512,10 @@ bool WebAssemblyPassConfig::addInstSelector() {
   // Eliminate range checks and add default targets to br_table instructions.
   addPass(createWebAssemblyFixBrTableDefaults());
 
+  // unreachable is terminator, non-terminator instruction after it is not
+  // allowed.
+  addPass(createWebAssemblyCleanCodeAfterTrap());
+
   return false;
 }