From a28343a33ed28b4d5c83c37e350aceaf09b5246f Mon Sep 17 00:00:00 2001
From: Sam Clegg <sbc@chromium.org>
Date: Thu, 5 Dec 2019 13:09:21 -0600
Subject: Add string parameter to WASM_UNREACHABLE (#2499)

This works more like llvm's unreachable handler in that is preserves
information even in release builds.
---
 src/support/bits.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'src/support/bits.cpp')

diff --git a/src/support/bits.cpp b/src/support/bits.cpp
index c237807ee..2489a0249 100644
--- a/src/support/bits.cpp
+++ b/src/support/bits.cpp
@@ -17,6 +17,7 @@
 #define wasm_support_bits_definitions
 #include "support/bits.h"
 #include "../compiler-support.h"
+#include "support/utilities.h"
 
 namespace wasm {
 
@@ -91,7 +92,7 @@ template<> int CountLeadingZeroes<uint64_t>(uint64_t v) {
 uint32_t Log2(uint32_t v) {
   switch (v) {
     default:
-      WASM_UNREACHABLE();
+      WASM_UNREACHABLE("invalid value");
     case 1:
       return 0;
     case 2:
-- 
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