[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/ir/branch-utils.h b/src/ir/branch-utils.h
index 8a4f02a58..826483b09 100644
--- a/src/ir/branch-utils.h
+++ b/src/ir/branch-utils.h
@@ -136,7 +136,7 @@ inline bool replacePossibleTarget(Expression* branch, Name from, Name to) {
 }
 
 // Replace all delegate targets within the given AST.
-inline void replaceDelegateTargets(Expression* ast, Name from, Name to) {
+inline void replaceExceptionTargets(Expression* ast, Name from, Name to) {
   struct Replacer
     : public PostWalker<Replacer, UnifiedExpressionVisitor<Replacer>> {
     Name from, to;