[WebAssembly] Rename CATCH/CATCH_ALL to *_LEGACY (#107187)

This renames MIR instruction `CATCH` and `CATCH_ALL` to `CATCH_LEGACY`
and `CATCH_ALL_LEGACY` respectively.

Follow-up PRs for the new EH (exnref) implementation will use `CATCH`,
`CATCH_REF`, `CATCH_ALL`, and `CATCH_ALL_REF` as pseudo-instructions
that return extracted values or `exnref` or both, because we don't
currently support block return values in LLVM. So to give the old (real)
`CATCH`es and the new (pseudo) `CATCH`es different names, this attaches
`_LEGACY` prefix to the old names.

This also rearranges `WebAssemblyInstrControl.td` so that the old legacy
instructions are listed all together at the end.

1 files changed, 5 insertions, 5 deletions

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp
index 6fd882f..3362ea5 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyCFGStackify.cpp
@@ -1305,7 +1305,7 @@ bool WebAssemblyCFGStackify::fixCatchUnwindMismatches(MachineFunction &MF) {
 
         // catch_all always catches an exception, so we don't need to do
         // anything
-        if (MI.getOpcode() == WebAssembly::CATCH_ALL) {
+        if (MI.getOpcode() == WebAssembly::CATCH_ALL_LEGACY) {
         }
 
         // This can happen when the unwind dest was removed during the
@@ -1448,8 +1448,8 @@ void WebAssemblyCFGStackify::recalculateScopeTops(MachineFunction &MF) {
       case WebAssembly::DELEGATE:
         updateScopeTops(EndToBegin[&MI]->getParent(), &MBB);
         break;
-      case WebAssembly::CATCH:
-      case WebAssembly::CATCH_ALL:
+      case WebAssembly::CATCH_LEGACY:
+      case WebAssembly::CATCH_ALL_LEGACY:
         updateScopeTops(EHPadToTry[&MBB]->getParent(), &MBB);
         break;
       }
@@ -1698,8 +1698,8 @@ void WebAssemblyCFGStackify::rewriteDepthImmediates(MachineFunction &MF) {
         Stack.push_back(std::make_pair(EndToBegin[&MI]->getParent(), &MI));
         break;
 
-      case WebAssembly::CATCH:
-      case WebAssembly::CATCH_ALL:
+      case WebAssembly::CATCH_LEGACY:
+      case WebAssembly::CATCH_ALL_LEGACY:
         EHPadStack.pop_back();
         break;