From: Matthias Kretz <m.kretz@gsi.de>
Date: Thu, 25 May 2023 08:45:21 +0000 (+0200)
Subject: libstdc++: Resolve -Wsign-compare issue
X-Git-Tag: releases/gcc-11.5.0~752
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ed3debbd45e1c53631ed88ad6897c12a53e09766;p=thirdparty%2Fgcc.git

libstdc++: Resolve -Wsign-compare issue

Signed-off-by: Matthias Kretz <m.kretz@gsi.de>

libstdc++-v3/ChangeLog:

	* include/experimental/bits/simd_ppc.h (_S_bit_shift_left):
	Negative __y is UB, so prefer signed compare.

(cherry picked from commit 1a1abec1d618cde709c585fcce89330bb33b07ac)
---

diff --git a/libstdc++-v3/include/experimental/bits/simd_ppc.h b/libstdc++-v3/include/experimental/bits/simd_ppc.h
index f1fec53cc794..6e4a6ec606e7 100644
--- a/libstdc++-v3/include/experimental/bits/simd_ppc.h
+++ b/libstdc++-v3/include/experimental/bits/simd_ppc.h
@@ -64,7 +64,7 @@ template <typename _Abi>
 	__x = _Base::_S_bit_shift_left(__x, __y);
 	if constexpr (sizeof(_Tp) < sizeof(int))
 	  {
-	    if (__y >= sizeof(_Tp) * __CHAR_BIT__)
+	    if (__y >= int(sizeof(_Tp) * __CHAR_BIT__))
 	      return {};
 	  }
 	return __x;