https://git.ruby-lang.org/ruby.git/commit/?id=3a3033c138

From 3a3033c138c0951ad5edbf02b5c233b58a190d2f Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Fri, 9 Apr 2021 13:52:13 +0900
Subject: get rid of using `__builtin_unreachable` directly [Bug #17787]

As it is an independent feature from `clz`, `ctz` and `popcount`,
it might be unavailable even if the latters are built in.
---
 internal/bits.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/internal/bits.h b/internal/bits.h
index a7ddcae..746947b 100644
--- a/internal/bits.h
+++ b/internal/bits.h
@@ -284,7 +284,7 @@ nlz_int64(uint64_t x) https://github.com/ruby/ruby/blob/trunk/internal/bits.h#L284
     }
     else {
         /* :FIXME: Is there a way to make this branch a compile-time error? */
-        __builtin_unreachable();
+        UNREACHABLE_RETURN(~0);
     }
 
 #else
@@ -419,7 +419,7 @@ rb_popcount64(uint64_t x) https://github.com/ruby/ruby/blob/trunk/internal/bits.h#L419
     }
     else {
         /* :FIXME: Is there a way to make this branch a compile-time error? */
-        __builtin_unreachable();
+        UNREACHABLE_RETURN(~0);
     }
 
 #else
@@ -492,7 +492,7 @@ ntz_int64(uint64_t x) https://github.com/ruby/ruby/blob/trunk/internal/bits.h#L492
     }
     else {
         /* :FIXME: Is there a way to make this branch a compile-time error? */
-        __builtin_unreachable();
+        UNREACHABLE_RETURN(~0);
     }
 
 #else
-- 
cgit v1.1


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