| ; RUN: opt -O2 -S %s | FileCheck %s |
| ; RUN: opt -passes='default<O2>' -S %s | FileCheck %s |
| |
| target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx" |
| |
| ; The loop below needs to be peeled first to eliminate the constant PHI %first |
| ; before loop vectorization. |
| ; |
| ; Test case from PR47671. |
| |
| define i32 @test(i32* readonly %p, i32* readnone %q) { |
| ; CHECK-LABEL: define i32 @test( |
| ; CHECK: vector.body: |
| ; CHECK: %index.next = add nuw i64 %index, 8 |
| ; CHECK: middle.block: |
| ; |
| entry: |
| %cmp.not7 = icmp eq i32* %p, %q |
| br i1 %cmp.not7, label %exit, label %loop.ph |
| |
| loop.ph: |
| br label %loop |
| |
| loop: |
| %sum = phi i32 [ %sum.next, %loop ], [ 0, %loop.ph ] |
| %first = phi i1 [ false, %loop ], [ true, %loop.ph ] |
| %iv = phi i32* [ %iv.next, %loop ], [ %p, %loop.ph ] |
| %add = add nsw i32 %sum, 2 |
| %spec.select = select i1 %first, i32 %sum, i32 %add |
| %lv = load i32, i32* %iv, align 4 |
| %sum.next = add nsw i32 %lv, %spec.select |
| %iv.next = getelementptr inbounds i32, i32* %iv, i64 1 |
| %cmp.not = icmp eq i32* %iv.next, %q |
| br i1 %cmp.not, label %loopexit, label %loop |
| |
| loopexit: |
| %sum.next.lcssa = phi i32 [ %sum.next, %loop ] |
| br label %exit |
| |
| exit: |
| %sum.0.lcssa = phi i32 [ 0, %entry ], [ %sum.next.lcssa, %loopexit ] |
| ret i32 %sum.0.lcssa |
| } |