1 ; RUN: llc < %s -march=bfin > %t 2 3 ; The DAG combiner may sometimes create illegal i16 SETCC operations when run 4 ; after LegalizeOps. Try to tease out all the optimizations in 5 ; TargetLowering::SimplifySetCC. 6 7 @x = external global i16 8 @y = external global i16 9 10 declare i16 @llvm.ctlz.i16(i16) 11 12 ; Case (srl (ctlz x), 5) == const 13 ; Note: ctlz is promoted, so this test does not catch the DAG combiner 14 define i1 @srl_ctlz_const() { 15 %x = load i16* @x 16 %c = call i16 @llvm.ctlz.i16(i16 %x) 17 %s = lshr i16 %c, 4 18 %r = icmp eq i16 %s, 1 19 ret i1 %r 20 } 21 22 ; Case (zext x) == const 23 define i1 @zext_const() { 24 %x = load i16* @x 25 %r = icmp ugt i16 %x, 1 26 ret i1 %r 27 } 28 29 ; Case (sext x) == const 30 define i1 @sext_const() { 31 %x = load i16* @x 32 %y = add i16 %x, 1 33 %x2 = sext i16 %y to i32 34 %r = icmp ne i32 %x2, -1 35 ret i1 %r 36 } 37 38
