[PATCH] D44559: [Sema] Wrong width of result of mul operation

Craig Topper via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Fri Mar 16 11:45:08 PDT 2018

craig.topper added a comment.

gcc also warns for this

short foo(char a) {

  return a * a;


Despite the fact that the char would be promoted to int, the upper bits are just sign bits and the multiply result still fits in a short.

  rC Clang


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