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commit d54bb9b1d3fd25779fba2c403003c5097ba9af73
Author: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
Date:   Mon Jun 26 09:55:41 2017 -0300

    Prevent an implicit int promotion in malloc/tst-alloc_buffer.c
    
    According to ISO C11, section 6.5.3.3 "Unary arithmetic operators", the
    result of the ~ operator is the bitwise complement of its (promoted)
    operand.
    This can lead to a comparison of a char with another integer type.
    
    Tested on powerpc, powerpc64 and powerpc64le.
    
            * malloc/tst-alloc_buffer.c (test_misaligned): Cast to char
            before comparing with another char.

diff --git a/malloc/tst-alloc_buffer.c b/malloc/tst-alloc_buffer.c
index 1c143999c70180f7..9b2bd2046a12c0f2 100644
--- a/malloc/tst-alloc_buffer.c
+++ b/malloc/tst-alloc_buffer.c
@@ -429,7 +429,7 @@ test_misaligned (char pad)
   }
 
   /* Verify that padding was not overwritten.  */
-  TEST_VERIFY (backing[0] == ~pad);
+  TEST_VERIFY (backing[0] == (char) ~pad);
   TEST_VERIFY (backing[SIZE + 1] == pad);
   free (backing);
 }