1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -S -passes=jump-threading,loop-rotate,instcombine,indvars,loop-unroll,simplifycfg -simplifycfg-require-and-preserve-domtree=1 -verify-dom-info -verify-loop-info < %s | FileCheck %s 3 4; Jump threading should not prevent this loop from being unrolled. 5; There should be 3 volatile stores and no branch 6 7target 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" 8target triple = "i386-apple-darwin9.6" 9@v1 = external global i32 ; <ptr> [#uses=2] 10 11define i32 @unroll() nounwind { 12; CHECK-LABEL: @unroll( 13; CHECK-NEXT: entry: 14; CHECK-NEXT: store volatile i32 1000, ptr @v1, align 4 15; CHECK-NEXT: store volatile i32 1001, ptr @v1, align 4 16; CHECK-NEXT: store volatile i32 1001, ptr @v1, align 4 17; CHECK-NEXT: ret i32 0 18; 19entry: 20 br label %bb4 21 22bb: ; preds = %bb4 23 %0 = icmp eq i32 %i.0, 0 ; <i1> [#uses=1] 24 br i1 %0, label %bb1, label %bb2 25 26bb1: ; preds = %bb 27 store volatile i32 1000, ptr @v1, align 4 28 br label %bb3 29 30bb2: ; preds = %bb 31 store volatile i32 1001, ptr @v1, align 4 32 br label %bb3 33 34bb3: ; preds = %bb2, %bb1 35 %1 = add i32 %i.0, 1 ; <i32> [#uses=1] 36 br label %bb4 37 38bb4: ; preds = %bb3, %entry 39 %i.0 = phi i32 [ 0, %entry ], [ %1, %bb3 ] ; <i32> [#uses=3] 40 %2 = icmp sgt i32 %i.0, 2 ; <i1> [#uses=1] 41 br i1 %2, label %bb5, label %bb 42 43bb5: ; preds = %bb4 44 ret i32 0 45} 46