| ; RUN: opt < %s -indvars -S | FileCheck %s |
| ; RUN: opt -lcssa -loop-simplify -S < %s | opt -S -passes='require<targetir>,require<scalar-evolution>,require<domtree>,loop(indvars)' |
| |
| ; Provide legal integer types. |
| target datalayout = "n8:16:32:64" |
| |
| |
| target triple = "x86_64-apple-darwin" |
| |
| ; CHECK-LABEL: @loop_0 |
| ; CHECK-LABEL: B18: |
| ; Only one phi now. |
| ; CHECK: phi |
| ; CHECK-NOT: phi |
| ; One trunc for the gep. |
| ; CHECK: trunc i64 %indvars.iv to i32 |
| ; One trunc for the dummy() call. |
| ; CHECK-LABEL: exit24: |
| ; CHECK: trunc i64 {{.*}}lcssa.wide to i32 |
| define void @loop_0(i32* %a) { |
| Prologue: |
| br i1 undef, label %B18, label %B6 |
| |
| B18: ; preds = %B24, %Prologue |
| %.02 = phi i32 [ 0, %Prologue ], [ %tmp33, %B24 ] |
| %tmp23 = zext i32 %.02 to i64 |
| %tmp33 = add i32 %.02, 1 |
| %o = getelementptr i32, i32* %a, i32 %.02 |
| %v = load i32, i32* %o |
| %t = icmp eq i32 %v, 0 |
| br i1 %t, label %exit24, label %B24 |
| |
| B24: ; preds = %B18 |
| %t2 = icmp eq i32 %tmp33, 20 |
| br i1 %t2, label %B6, label %B18 |
| |
| B6: ; preds = %Prologue |
| ret void |
| |
| exit24: ; preds = %B18 |
| call void @dummy(i32 %.02) |
| unreachable |
| } |
| |
| define void @loop_1(i32 %lim) { |
| ; CHECK-LABEL: @loop_1( |
| entry: |
| %entry.cond = icmp ne i32 %lim, 0 |
| br i1 %entry.cond, label %loop, label %leave |
| |
| loop: |
| ; CHECK: loop: |
| ; CHECK: %indvars.iv = phi i64 [ 1, %loop.preheader ], [ %indvars.iv.next, %loop ] |
| ; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| ; CHECK: [[IV_INC:%[^ ]+]] = add nsw i64 %indvars.iv, -1 |
| ; CHECK: call void @dummy.i64(i64 [[IV_INC]]) |
| |
| %iv = phi i32 [ 1, %entry ], [ %iv.inc, %loop ] |
| %iv.inc = add i32 %iv, 1 |
| %iv.inc.sub = add i32 %iv, -1 |
| %iv.inc.sub.zext = zext i32 %iv.inc.sub to i64 |
| call void @dummy.i64(i64 %iv.inc.sub.zext) |
| %be.cond = icmp ult i32 %iv.inc, %lim |
| br i1 %be.cond, label %loop, label %leave |
| |
| leave: |
| ret void |
| } |
| |
| declare void @dummy(i32) |
| declare void @dummy.i64(i64) |