1; RUN: opt < %s -indvars -S | FileCheck %s 2; RUN: opt -lcssa -loop-simplify -S < %s | opt -S -passes='require<targetir>,require<scalar-evolution>,require<domtree>,loop(indvars)' 3 4; Provide legal integer types. 5target datalayout = "n8:16:32:64" 6 7 8target triple = "x86_64-apple-darwin" 9 10; CHECK-LABEL: @loop_0 11; CHECK-LABEL: B18: 12; Only one phi now. 13; CHECK: phi 14; CHECK-NOT: phi 15; One trunc for the gep. 16; CHECK: trunc i64 %indvars.iv to i32 17; One trunc for the dummy() call. 18; CHECK-LABEL: exit24: 19; CHECK: trunc i64 {{.*}}lcssa.wide to i32 20define void @loop_0(i32* %a) { 21Prologue: 22 br i1 undef, label %B18, label %B6 23 24B18: ; preds = %B24, %Prologue 25 %.02 = phi i32 [ 0, %Prologue ], [ %tmp33, %B24 ] 26 %tmp23 = zext i32 %.02 to i64 27 %tmp33 = add i32 %.02, 1 28 %o = getelementptr i32, i32* %a, i32 %.02 29 %v = load i32, i32* %o 30 %t = icmp eq i32 %v, 0 31 br i1 %t, label %exit24, label %B24 32 33B24: ; preds = %B18 34 %t2 = icmp eq i32 %tmp33, 20 35 br i1 %t2, label %B6, label %B18 36 37B6: ; preds = %Prologue 38 ret void 39 40exit24: ; preds = %B18 41 call void @dummy(i32 %.02) 42 unreachable 43} 44 45define void @loop_1(i32 %lim) { 46; CHECK-LABEL: @loop_1( 47 entry: 48 %entry.cond = icmp ne i32 %lim, 0 49 br i1 %entry.cond, label %loop, label %leave 50 51 loop: 52; CHECK: loop: 53; CHECK: %indvars.iv = phi i64 [ 1, %loop.preheader ], [ %indvars.iv.next, %loop ] 54; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 55; CHECK: [[IV_INC:%[^ ]+]] = add nsw i64 %indvars.iv, -1 56; CHECK: call void @dummy.i64(i64 [[IV_INC]]) 57 58 %iv = phi i32 [ 1, %entry ], [ %iv.inc, %loop ] 59 %iv.inc = add i32 %iv, 1 60 %iv.inc.sub = add i32 %iv, -1 61 %iv.inc.sub.zext = zext i32 %iv.inc.sub to i64 62 call void @dummy.i64(i64 %iv.inc.sub.zext) 63 %be.cond = icmp ult i32 %iv.inc, %lim 64 br i1 %be.cond, label %loop, label %leave 65 66 leave: 67 ret void 68} 69 70declare void @dummy(i32) 71declare void @dummy.i64(i64) 72