1 ; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s 2 3 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" 4 target triple = "i386-apple-darwin9.6" 5 6 define i64 @foo(i64* nocapture %x, i64 %n) nounwind { 7 ; CHECK-LABEL: Classifying expressions for: @foo 8 entry: 9 %t0 = icmp sgt i64 %n, 0 10 br i1 %t0, label %bb, label %return 11 12 bb: 13 %i.01 = phi i64 [ 0, %entry ], [ %indvar.next, %bb ] 14 %t1 = shl i64 %i.01, 7 15 %t2 = ashr i64 %t1, 7 16 ; CHECK: %t2 = ashr i64 %t1, 7 17 ; CHECK-NEXT: sext i57 {0,+,199}<%bb> to i64 18 ; CHECK-SAME: Exits: (sext i57 (-199 + (trunc i64 %n to i57)) to i64) 19 ; CHECK: %s2 = ashr i64 %s1, 5 20 ; CHECK-NEXT: sext i59 {0,+,199}<%bb> to i64 21 ; CHECK-SAME: Exits: (sext i59 (-199 + (trunc i64 %n to i59)) to i64) 22 %s1 = shl i64 %i.01, 5 23 %s2 = ashr i64 %s1, 5 24 %t3 = getelementptr i64, i64* %x, i64 %i.01 25 store i64 0, i64* %t3, align 1 26 %indvar.next = add i64 %i.01, 199 27 %exitcond = icmp eq i64 %indvar.next, %n 28 br i1 %exitcond, label %return, label %bb 29 30 return: 31 %p = phi i64 [ 0, %entry ], [ %t2, %bb ] 32 %q = phi i64 [ 0, %entry ], [ %s2, %bb ] 33 %v = xor i64 %p, %q 34 ret i64 %v 35 } 36
