[EH] Rename delegateTarget to exceptionTarget (NFC) (#3562)

So far `Try`'s label is only targetted by `delegate`s, but it turns out
`rethrow` also has to follow the same rule as `delegate` so it needs to
target a `Try` label. So this renames variables like
`delegateTargetNames` to `exceptionTargetNames` and methods like
`replaceDelegateTargets` to `replaceExceptionTargets`.

I considered `tryTarget`, but the branch/block counterpart name we use
is not `blockTarget` but `branchTarget`, so I chose `exceptionTarget`.

The patch that fixes `rethrow`'s target will follow; this is the
preparation for that.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/wasm/wasm-s-parser.cpp b/src/wasm/wasm-s-parser.cpp
index d2b24fbed..0ff4bfb9f 100644
--- a/src/wasm/wasm-s-parser.cpp
+++ b/src/wasm/wasm-s-parser.cpp
@@ -2048,7 +2048,7 @@ Expression* SExpressionWasmBuilder::makeTry(Element& s) {
     if (inner.size() != 2) {
       throw ParseException("invalid delegate", inner.line, inner.col);
     }
-    ret->delegateTarget = getLabel(*inner[1], LabelType::Delegate);
+    ret->delegateTarget = getLabel(*inner[1], LabelType::Exception);
   }
 
   if (i != s.size()) {