| ; RUN: opt -loop-load-elim -S < %s -enable-new-pm=0 | FileCheck %s |
| ; New PM does not allow a pass to require another pass to have been run |
| ; RUN: opt -passes=loop-simplify,loop-load-elim -S < %s | FileCheck %s |
| |
| ; Make sure we create a preheader if we don't have one. |
| |
| target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| |
| define void @f(i32* noalias nocapture %A, i32* noalias nocapture readonly %B, i64 %N, i1 %C) { |
| entry: |
| br i1 %C, label %for.body, label %for.end |
| |
| ; CHECK: for.body.preheader: |
| ; CHECK-NEXT: %load_initial = load i32, i32* %A |
| ; CHECK-NEXT: br label %for.body |
| |
| ; CHECK: for.body: |
| for.body: |
| ; CHECK-NEXT: %store_forwarded = phi i32 [ %load_initial, %for.body.preheader ], [ %add, %for.body ] |
| %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] |
| %arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv |
| %load = load i32, i32* %arrayidx, align 4 |
| %arrayidx2 = getelementptr inbounds i32, i32* %B, i64 %indvars.iv |
| %load_1 = load i32, i32* %arrayidx2, align 4 |
| ; CHECK: %add = add i32 %load_1, %store_forwarded |
| %add = add i32 %load_1, %load |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 |
| %arrayidx_next = getelementptr inbounds i32, i32* %A, i64 %indvars.iv.next |
| store i32 %add, i32* %arrayidx_next, align 4 |
| %exitcond = icmp eq i64 %indvars.iv.next, %N |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: |
| ret void |
| } |