; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4 ; RUN: opt -passes='print' -disable-output < %s 2>&1 | FileCheck %s target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128" ; void vectorizable_Read_Write(int *A) { ; for (unsigned i = 1022; i >= 0; i--) ; A[i+1] = A[i] + 1; ; } define void @vectorizable_Read_Write(ptr nocapture %A) { ; CHECK-LABEL: 'vectorizable_Read_Write' ; CHECK-NEXT: loop: ; CHECK-NEXT: Memory dependences are safe ; CHECK-NEXT: Dependences: ; CHECK-NEXT: Forward: ; CHECK-NEXT: %l = load i32, ptr %gep.A, align 4 -> ; CHECK-NEXT: store i32 %add, ptr %gep.A.plus.1, align 4 ; CHECK-EMPTY: ; CHECK-NEXT: Run-time memory checks: ; CHECK-NEXT: Grouped accesses: ; CHECK-EMPTY: ; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop. ; CHECK-NEXT: SCEV assumptions: ; CHECK-EMPTY: ; CHECK-NEXT: Expressions re-written: ; entry: %A.plus.1 = getelementptr i32, ptr %A, i64 1 br label %loop loop: %iv = phi i64 [ 1022, %entry ], [ %iv.next, %loop ] %gep.A = getelementptr inbounds i32, ptr %A, i64 %iv %l = load i32, ptr %gep.A, align 4 %add = add nsw i32 %l, 1 %gep.A.plus.1 = getelementptr i32, ptr %A.plus.1, i64 %iv store i32 %add, ptr %gep.A.plus.1, align 4 %iv.next = add nsw i64 %iv, -1 %cmp.not = icmp eq i64 %iv, 0 br i1 %cmp.not, label %exit, label %loop exit: ret void } define void @neg_step_ForwardButPreventsForwarding(ptr nocapture %A, ptr noalias %B) { ; CHECK-LABEL: 'neg_step_ForwardButPreventsForwarding' ; CHECK-NEXT: loop: ; CHECK-NEXT: Report: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop ; CHECK-NEXT: Forward loop carried data dependence that prevents store-to-load forwarding. ; CHECK-NEXT: Dependences: ; CHECK-NEXT: ForwardButPreventsForwarding: ; CHECK-NEXT: store i32 0, ptr %gep.A, align 4 -> ; CHECK-NEXT: %l = load i32, ptr %gep.A.plus.1, align 4 ; CHECK-EMPTY: ; CHECK-NEXT: Run-time memory checks: ; CHECK-NEXT: Grouped accesses: ; CHECK-EMPTY: ; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop. ; CHECK-NEXT: SCEV assumptions: ; CHECK-EMPTY: ; CHECK-NEXT: Expressions re-written: ; entry: %A.plus.1 = getelementptr i32, ptr %A, i64 1 br label %loop loop: %iv = phi i64 [ 1022, %entry ], [ %iv.next, %loop ] %gep.A = getelementptr inbounds i32, ptr %A, i64 %iv store i32 0, ptr %gep.A, align 4 %gep.A.plus.1 = getelementptr i32, ptr %A.plus.1, i64 %iv %l = load i32, ptr %gep.A.plus.1, align 4 store i32 %l, ptr %B %iv.next = add nsw i64 %iv, -1 %cmp.not = icmp eq i64 %iv, 0 br i1 %cmp.not, label %exit, label %loop exit: ret void }