From 139d0203d520ca589070ad5d5c2d8c08e7d96afe Mon Sep 17 00:00:00 2001
From: Thomas Lively <7121787+tlively@users.noreply.github.com>
Date: Mon, 15 Jun 2020 17:21:58 -0700
Subject: Add Expression::dump for use while debugging (#2912)

I have found that similar dump functions have been extremely helpful
while debugging LLVM. Rather than re-implement this locally whenever I
need it, it would be better have this utility upstream.
---
 src/wasm.h        | 3 +++
 src/wasm/wasm.cpp | 8 ++++++++
 2 files changed, 11 insertions(+)

(limited to 'src')

diff --git a/src/wasm.h b/src/wasm.h
index a1c386289..b52e7539b 100644
--- a/src/wasm.h
+++ b/src/wasm.h
@@ -588,6 +588,9 @@ public:
     assert(int(_id) == int(T::SpecificId));
     return (const T*)this;
   }
+
+  // Print the expression to stderr. Meant for use while debugging.
+  void dump();
 };
 
 const char* getExpressionName(Expression* curr);
diff --git a/src/wasm/wasm.cpp b/src/wasm/wasm.cpp
index 6f86a13ac..f1d51bbca 100644
--- a/src/wasm/wasm.cpp
+++ b/src/wasm/wasm.cpp
@@ -16,6 +16,7 @@
 
 #include "wasm.h"
 #include "ir/branch-utils.h"
+#include "wasm-printing.h"
 #include "wasm-traversal.h"
 
 namespace wasm {
@@ -93,6 +94,13 @@ Name ATTR("attr");
 
 // Expressions
 
+void Expression::dump() {
+  WasmPrinter::printExpression(this,
+                               std::cerr,
+                               /*minify=*/false,
+                               /*full=*/true);
+}
+
 const char* getExpressionName(Expression* curr) {
   switch (curr->_id) {
     case Expression::Id::InvalidId:
-- 
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