https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79121
--- Comment #2 from Richard Earnshaw <rearnsha at gcc dot gnu.org> --- Author: rearnsha Date: Thu Jan 19 10:35:38 2017 New Revision: 244613 URL: https://gcc.gnu.org/viewcvs?rev=244613&root=gcc&view=rev Log: [expand] Fix for PR rtl-optimization/79121 incorrect expansion of extend plus left shift When generating a shift from an extended value moving from one to two machine registers, the type of the right shift is for the most significant word should be determined by the signedness of the inner type, not the signedness of the result type. gcc: PR rtl-optimization/79121 * expr.c (expand_expr_real_2, case LSHIFT_EXPR): Look at the signedness of the inner type when shifting an extended value. gcc/testsuite: * gcc.c-torture/execute/pr79121.c: New test. Added: trunk/gcc/testsuite/gcc.c-torture/execute/pr79121.c Modified: trunk/gcc/ChangeLog trunk/gcc/expr.c trunk/gcc/testsuite/ChangeLog
