1 ; RUN: opt < %s -scalar-evolution -analyze | FileCheck %s 2 3 ; CHECK: Loop %bb3: backedge-taken count is (-1 + %n) 4 5 ; We don't want to use a max in the trip count expression in 6 ; this testcase. 7 8 define void @foo(i32 %n, i32* %p, i32* %q) nounwind { 9 entry: 10 icmp sgt i32 %n, 0 11 br i1 %0, label %bb, label %return 12 13 bb: 14 load i32* %q, align 4 15 icmp eq i32 %1, 0 16 br i1 %2, label %return, label %bb3.preheader 17 18 bb3.preheader: 19 br label %bb3 20 21 bb3: 22 %i.0 = phi i32 [ %7, %bb3 ], [ 0, %bb3.preheader ] 23 getelementptr i32* %p, i32 %i.0 24 load i32* %3, align 4 25 add i32 %4, 1 26 getelementptr i32* %p, i32 %i.0 27 store i32 %5, i32* %6, align 4 28 add i32 %i.0, 1 29 icmp slt i32 %7, %n 30 br i1 %8, label %bb3, label %return.loopexit 31 32 return.loopexit: 33 br label %return 34 35 return: 36 ret void 37 } 38
