+2015-07-10 Uros Bizjak <ubizjak@gmail.com>
+
+ PR target/66813
+ * config/i386/i386.c (ix86_md_asm_adjust): Emit movstrictqi
+ sequence for TARGET_ZERO_EXTEND_WITH_AND targets.
+
2015-07-10 Jakub Jelinek <jakub@redhat.com>
PR middle-end/66820
{
rtx destqi = gen_reg_rtx (QImode);
emit_insn (gen_rtx_SET (destqi, x));
- x = gen_rtx_ZERO_EXTEND (dest_mode, destqi);
+
+ if (TARGET_ZERO_EXTEND_WITH_AND
+ && optimize_function_for_speed_p (cfun))
+ {
+ x = force_reg (dest_mode, const0_rtx);
+
+ emit_insn (gen_movstrictqi
+ (gen_lowpart (QImode, x), destqi));
+ }
+ else
+ x = gen_rtx_ZERO_EXTEND (dest_mode, destqi);
}
emit_insn (gen_rtx_SET (dest, x));
}
--- /dev/null
+/* { dg-do compile { target { ia32 } } } */
+/* { dg-options "-march=pentium" } */
+
+void f_s(void) { short x; asm("" : "=@ccc"(x)); }
+void f_i(void) { int x; asm("" : "=@ccc"(x)); }