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. 5 target datalayout = "n8:16:32:64" 6 7 8 target 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 20 define void @loop_0(i32* %a) { 21 Prologue: 22 br i1 undef, label %B18, label %B6 23 24 B18: ; 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 33 B24: ; preds = %B18 34 %t2 = icmp eq i32 %tmp33, 20 35 br i1 %t2, label %B6, label %B18 36 37 B6: ; preds = %Prologue 38 ret void 39 40 exit24: ; preds = %B18 41 call void @dummy(i32 %.02) 42 unreachable 43 } 44 45 define 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 70 declare void @dummy(i32) 71 declare void @dummy.i64(i64) 72
