| ; RUN: opt -loop-accesses -analyze -enable-new-pm=0 < %s | FileCheck %s |
| ; RUN: opt -passes='require<scalar-evolution>,require<aa>,loop(print-access-info)' -disable-output < %s 2>&1 | FileCheck %s |
| |
| ; We give up analyzing the dependences in this loop due to non-constant |
| ; distance between A[i+offset] and A[i] and add memchecks to prove |
| ; independence. Make sure that no dependences are reported in |
| ; this case. |
| ; |
| ; for (i = 0; i < n; i++) |
| ; A[i + offset] = A[i] * B[i] * C[i]; |
| |
| target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-apple-macosx10.10.0" |
| |
| ; CHECK: Memory dependences are safe with run-time checks |
| ; CHECK-NEXT: Dependences: |
| ; CHECK-NEXT: Run-time memory checks: |
| ; CHECK-NEXT: 0: |
| ; CHECK-NEXT: Comparing group |
| ; CHECK-NEXT: %arrayidxA2 = getelementptr inbounds i16, i16* %a, i64 %idx |
| ; CHECK-NEXT: Against group |
| ; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %indvar |
| |
| @B = common global i16* null, align 8 |
| @A = common global i16* null, align 8 |
| @C = common global i16* null, align 8 |
| |
| define void @f(i64 %offset) { |
| entry: |
| %a = load i16*, i16** @A, align 8 |
| %b = load i16*, i16** @B, align 8 |
| %c = load i16*, i16** @C, align 8 |
| br label %for.body |
| |
| for.body: ; preds = %for.body, %entry |
| %indvar = phi i64 [ 0, %entry ], [ %add, %for.body ] |
| |
| %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %indvar |
| %loadA = load i16, i16* %arrayidxA, align 2 |
| |
| %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %indvar |
| %loadB = load i16, i16* %arrayidxB, align 2 |
| |
| %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %indvar |
| %loadC = load i16, i16* %arrayidxC, align 2 |
| |
| %mul = mul i16 %loadB, %loadA |
| %mul1 = mul i16 %mul, %loadC |
| |
| %idx = add i64 %indvar, %offset |
| %arrayidxA2 = getelementptr inbounds i16, i16* %a, i64 %idx |
| store i16 %mul1, i16* %arrayidxA2, align 2 |
| |
| %add = add nuw nsw i64 %indvar, 1 |
| %exitcond = icmp eq i64 %add, 20 |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: ; preds = %for.body |
| ret void |
| } |