1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -S -indvars -loop-deletion -simplifycfg | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker; PR5794 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Worker; Indvars and loop deletion should be able to eliminate all looping 5*9880d681SAndroid Build Coastguard Worker; in this testcase. 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Worker; CHECK: define i32 @pmat(i32 %m, i32 %n, double* %y) #0 { 8*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT: entry: 9*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT: ret i32 0 10*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT: } 11*9880d681SAndroid Build Coastguard Worker 12*9880d681SAndroid Build Coastguard Workertarget datalayout = "e-p:64:64:64" 13*9880d681SAndroid Build Coastguard Worker 14*9880d681SAndroid Build Coastguard Workerdefine i32 @pmat(i32 %m, i32 %n, double* %y) nounwind { 15*9880d681SAndroid Build Coastguard Workerentry: 16*9880d681SAndroid Build Coastguard Worker %cmp4 = icmp sgt i32 %m, 0 17*9880d681SAndroid Build Coastguard Worker br i1 %cmp4, label %bb.n10, label %w.e12 18*9880d681SAndroid Build Coastguard Worker 19*9880d681SAndroid Build Coastguard Workerw.c: 20*9880d681SAndroid Build Coastguard Worker %cmp = icmp slt i32 %inc11, %m 21*9880d681SAndroid Build Coastguard Worker br i1 %cmp, label %w.c2.p, label %w.c.w.e12c 22*9880d681SAndroid Build Coastguard Worker 23*9880d681SAndroid Build Coastguard Workerw.c.w.e12c: 24*9880d681SAndroid Build Coastguard Worker br label %w.c.w.e12c.s 25*9880d681SAndroid Build Coastguard Worker 26*9880d681SAndroid Build Coastguard Workerw.c.w.e12c.s: 27*9880d681SAndroid Build Coastguard Worker br label %w.e12 28*9880d681SAndroid Build Coastguard Worker 29*9880d681SAndroid Build Coastguard Workerbb.n10: 30*9880d681SAndroid Build Coastguard Worker %cmp51 = icmp sgt i32 %n, 0 31*9880d681SAndroid Build Coastguard Worker br i1 %cmp51, label %bb.n10.w.c.w.e12c.sc, label %bb.n10.bb.n10.sc 32*9880d681SAndroid Build Coastguard Worker 33*9880d681SAndroid Build Coastguard Workerbb.n10.bb.n10.sc: 34*9880d681SAndroid Build Coastguard Worker br label %bb.n10.s 35*9880d681SAndroid Build Coastguard Worker 36*9880d681SAndroid Build Coastguard Workerbb.n10.w.c.w.e12c.sc: 37*9880d681SAndroid Build Coastguard Worker br label %w.c.w.e12c.s 38*9880d681SAndroid Build Coastguard Worker 39*9880d681SAndroid Build Coastguard Workerbb.n10.s: 40*9880d681SAndroid Build Coastguard Worker br label %w.c2.p 41*9880d681SAndroid Build Coastguard Worker 42*9880d681SAndroid Build Coastguard Workerw.c2.p: 43*9880d681SAndroid Build Coastguard Worker %i.05 = phi i32 [ 0, %bb.n10.s ], [ %inc11, %w.c ] 44*9880d681SAndroid Build Coastguard Worker br i1 false, label %bb.n, label %w.e 45*9880d681SAndroid Build Coastguard Worker 46*9880d681SAndroid Build Coastguard Workerw.c2: 47*9880d681SAndroid Build Coastguard Worker br i1 undef, label %w.b6, label %w.c2.w.ec 48*9880d681SAndroid Build Coastguard Worker 49*9880d681SAndroid Build Coastguard Workerw.c2.w.ec: 50*9880d681SAndroid Build Coastguard Worker br label %w.e 51*9880d681SAndroid Build Coastguard Worker 52*9880d681SAndroid Build Coastguard Workerbb.n: 53*9880d681SAndroid Build Coastguard Worker br label %w.b6 54*9880d681SAndroid Build Coastguard Worker 55*9880d681SAndroid Build Coastguard Workerw.b6: 56*9880d681SAndroid Build Coastguard Worker br label %w.c2 57*9880d681SAndroid Build Coastguard Worker 58*9880d681SAndroid Build Coastguard Workerw.e: 59*9880d681SAndroid Build Coastguard Worker %i.08 = phi i32 [ undef, %w.c2.w.ec ], [ %i.05, %w.c2.p ] 60*9880d681SAndroid Build Coastguard Worker %inc11 = add nsw i32 %i.08, 1 61*9880d681SAndroid Build Coastguard Worker br label %w.c 62*9880d681SAndroid Build Coastguard Worker 63*9880d681SAndroid Build Coastguard Workerw.e12: 64*9880d681SAndroid Build Coastguard Worker ret i32 0 65*9880d681SAndroid Build Coastguard Worker} 66*9880d681SAndroid Build Coastguard Worker 67*9880d681SAndroid Build Coastguard Worker; CHECK: attributes #0 = { nounwind } 68