| ; 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 |
| |
| ; Analyze this loop: |
| ; for (i = 0; i < n; i++) |
| ; A[i + 1] = 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: Report: unsafe dependent memory operations in loop |
| ; CHECK-NEXT: Dependences: |
| ; CHECK-NEXT: Backward: |
| ; CHECK-NEXT: %loadA = load i16, i16* %arrayidxA, align 2 -> |
| ; CHECK-NEXT: store i16 %mul1, i16* %arrayidxA_plus_2, align 2 |
| ; CHECK: Run-time memory checks: |
| ; CHECK-NEXT: 0: |
| ; CHECK-NEXT: Comparing group |
| ; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3 |
| ; CHECK-NEXT: %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add |
| ; CHECK-NEXT: Against group |
| ; CHECK-NEXT: %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %storemerge3 |
| ; CHECK-NEXT: 1: |
| ; CHECK-NEXT: Comparing group |
| ; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3 |
| ; CHECK-NEXT: %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add |
| ; CHECK-NEXT: Against group |
| ; CHECK-NEXT: %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %storemerge3 |
| |
| @B = common global i16* null, align 8 |
| @A = common global i16* null, align 8 |
| @C = common global i16* null, align 8 |
| |
| define void @f() { |
| 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 |
| %storemerge3 = phi i64 [ 0, %entry ], [ %add, %for.body ] |
| |
| %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3 |
| %loadA = load i16, i16* %arrayidxA, align 2 |
| |
| %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %storemerge3 |
| %loadB = load i16, i16* %arrayidxB, align 2 |
| |
| %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %storemerge3 |
| %loadC = load i16, i16* %arrayidxC, align 2 |
| |
| %mul = mul i16 %loadB, %loadA |
| %mul1 = mul i16 %mul, %loadC |
| |
| %add = add nuw nsw i64 %storemerge3, 1 |
| %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add |
| store i16 %mul1, i16* %arrayidxA_plus_2, align 2 |
| |
| %exitcond = icmp eq i64 %add, 20 |
| br i1 %exitcond, label %for.end, label %for.body |
| |
| for.end: ; preds = %for.body |
| ret void |
| } |