1 ; RUN: opt < %s -indvars -S | FileCheck %s 2 3 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 4 5 ; It is okay to do LFTR on this loop even though the trip count is a 6 ; division because in this case the division can be optimized to a 7 ; shift. 8 9 define void @foo(i8* %a, i8 %n) nounwind uwtable ssp { 10 ; CHECK-LABEL: @foo( 11 entry: 12 %e = icmp sgt i8 %n, 3 13 br i1 %e, label %loop, label %exit 14 15 loop: 16 ; CHECK-LABEL: loop: 17 %i = phi i8 [ 0, %entry ], [ %i.inc, %loop ] 18 %i1 = phi i8 [ 0, %entry ], [ %i1.inc, %loop ] 19 %i.inc = add nsw i8 %i, 4 20 %i1.inc = add i8 %i1, 1 21 store volatile i8 0, i8* %a 22 %c = icmp slt i8 %i, %n 23 ; CHECK-LABEL: %exitcond = icmp ne i8 %i1.inc 24 br i1 %c, label %loop, label %exit 25 26 exit: 27 ; CHECK-LABEL: exit: 28 ret void 29 } 30
