1; RUN: opt -S -loop-rotate < %s | FileCheck %s 2; RUN: opt -S -loop-rotate -enable-mssa-loop-dependency=true -verify-memoryssa < %s | FileCheck %s 3target 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" 4target triple = "x86_64-apple-darwin10.0" 5 6; PR5837 7define void @test(i32 %N, double* %G) nounwind ssp { 8entry: 9 br label %for.cond 10 11for.cond: ; preds = %for.body, %entry 12 %j.0 = phi i64 [ 1, %entry ], [ %inc, %for.body ] ; <i64> [#uses=5] 13 %cmp = icmp slt i64 %j.0, 1000 ; <i1> [#uses=1] 14 br i1 %cmp, label %for.body, label %for.end 15 16for.body: ; preds = %for.cond 17 %arrayidx = getelementptr inbounds double, double* %G, i64 %j.0 ; <double*> [#uses=1] 18 %tmp3 = load double, double* %arrayidx ; <double> [#uses=1] 19 %sub = sub i64 %j.0, 1 ; <i64> [#uses=1] 20 %arrayidx6 = getelementptr inbounds double, double* %G, i64 %sub ; <double*> [#uses=1] 21 %tmp7 = load double, double* %arrayidx6 ; <double> [#uses=1] 22 %add = fadd double %tmp3, %tmp7 ; <double> [#uses=1] 23 %arrayidx10 = getelementptr inbounds double, double* %G, i64 %j.0 ; <double*> [#uses=1] 24 store double %add, double* %arrayidx10 25 %inc = add nsw i64 %j.0, 1 ; <i64> [#uses=1] 26 br label %for.cond 27 28for.end: ; preds = %for.cond 29 ret void 30} 31 32; Should only end up with one phi. 33; CHECK-LABEL: define void @test( 34; CHECK-NEXT: entry: 35; CHECK-NEXT: br label %for.body 36; CHECK: for.body: 37; CHECK-NEXT: %j.01 = phi i64 38; CHECK-NOT: br 39; CHECK: br i1 %cmp, label %for.body, label %for.end 40; CHECK: for.end: 41; CHECK-NEXT: ret void 42