llvm/test/Analysis/LoopAccessAnalysis/invariant-dependence-before.ll

; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 3
; RUN: opt -passes='print<access-info>' -disable-output %s 2>&1 | FileCheck %s

define void @test_invar_dependence_before_positive_strided_access_1(ptr %a) {
; CHECK-LABEL: 'test_invar_dependence_before_positive_strided_access_1'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Memory dependences are safe
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %a
  store i32 %l, ptr %gep
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_before_positive_strided_access_2(ptr %a) {
; CHECK-LABEL: 'test_invar_dependence_before_positive_strided_access_2'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Memory dependences are safe
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %gep
  store i32 %l, ptr %a
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_not_before_positive_strided_access_1(ptr %a) {
; CHECK-LABEL: 'test_invar_dependence_not_before_positive_strided_access_1'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load i32, ptr %a, align 4 ->
; CHECK-NEXT:            store i32 %l, ptr %gep, 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:
  %gep.off = getelementptr i8, ptr %a, i32 3
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %a
  store i32 %l, ptr %gep
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_not_before_positive_strided_access_2(ptr %a) {
; CHECK-LABEL: 'test_invar_dependence_not_before_positive_strided_access_2'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load i32, ptr %gep, align 4 ->
; CHECK-NEXT:            store i32 %l, ptr %a, 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:
  %gep.off = getelementptr i8, ptr %a, i32 3
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %gep
  store i32 %l, ptr %a
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_before_positive_strided_access_1_different_access_sizes(ptr %a) {
; CHECK-LABEL: 'test_invar_dependence_before_positive_strided_access_1_different_access_sizes'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Memory dependences are safe
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %a
  %t = trunc i32 %l to i8
  store i8 %t, ptr %gep
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_not_before_positive_strided_access_1_different_access_sizes(ptr %a) {
; CHECK-LABEL: 'test_invar_dependence_not_before_positive_strided_access_1_different_access_sizes'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load i64, ptr %a, align 4 ->
; CHECK-NEXT:            store i32 %t, ptr %gep, 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i64, ptr %a
  %t = trunc i64 %l to i32
  store i32 %t, ptr %gep
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_before_negative_strided_access_1(ptr %a) {
; CHECK-LABEL: 'test_invar_dependence_before_negative_strided_access_1'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Memory dependences are safe
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i32, ptr %a, i32 100
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %a
  store i32 %l, ptr %gep
  %iv.next = sub i32 %iv, 1
  %ec = icmp eq i32 %iv.next, -100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_before_negative_strided_access_2(ptr %a) {
; CHECK-LABEL: 'test_invar_dependence_before_negative_strided_access_2'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Memory dependences are safe
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i32, ptr %a, i32 100
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %gep
  store i32 %l, ptr %a
  %iv.next = sub i32 %iv, 1
  %ec = icmp eq i32 %iv.next, -100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}


define void @test_invar_dependence_not_before_negative_strided_access_1(ptr %a) {
; CHECK-LABEL: 'test_invar_dependence_not_before_negative_strided_access_1'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load i32, ptr %a, align 4 ->
; CHECK-NEXT:            store i32 %l, ptr %gep, 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:
  %gep.off = getelementptr i32, ptr %a, i32 99
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %a
  store i32 %l, ptr %gep
  %iv.next = sub i32 %iv, 1
  %ec = icmp eq i32 %iv.next, -100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_not_before_negative_strided_access_2(ptr %a) {
; CHECK-LABEL: 'test_invar_dependence_not_before_negative_strided_access_2'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load i32, ptr %gep, align 4 ->
; CHECK-NEXT:            store i32 %l, ptr %a, 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:
  %gep.off = getelementptr i32, ptr %a, i32 99
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %gep
  store i32 %l, ptr %a
  %iv.next = sub i32 %iv, 1
  %ec = icmp eq i32 %iv.next, -100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_both_invar_before_1(ptr %a) {
; CHECK-LABEL: 'test_both_invar_before_1'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Memory dependences are safe
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %l = load i32, ptr %a
  store i32 %l, ptr %gep.off
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_both_invar_before_2(ptr %a) {
; CHECK-LABEL: 'test_both_invar_before_2'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Memory dependences are safe
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %l = load i32, ptr %gep.off
  store i32 %l, ptr %a
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_both_invar_not_before_1(ptr %a) {
; CHECK-LABEL: 'test_both_invar_not_before_1'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load i32, ptr %a, align 4 ->
; CHECK-NEXT:            store i32 %l, ptr %gep.off, 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:
  %gep.off = getelementptr i8, ptr %a, i32 3
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %l = load i32, ptr %a
  store i32 %l, ptr %gep.off
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_both_invar_not_before_2(ptr %a) {
; CHECK-LABEL: 'test_both_invar_not_before_2'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load i32, ptr %gep.off, align 4 ->
; CHECK-NEXT:            store i32 %l, ptr %a, 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:
  %gep.off = getelementptr i8, ptr %a, i32 3
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %l = load i32, ptr %gep.off
  store i32 %l, ptr %a
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_before_via_loop_guard_positive_strided_access_1(ptr %a, i32 %off) {
; CHECK-LABEL: 'test_invar_dependence_before_via_loop_guard_positive_strided_access_1'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load i32, ptr %a, align 4 ->
; CHECK-NEXT:            store i32 %l, ptr %gep, 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:
  %gep.off = getelementptr i8, ptr %a, i32 %off
  %c = icmp sge i32 %off, 4
  br i1 %c, label %loop, label %exit

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %a
  store i32 %l, ptr %gep
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_before_via_loop_guard_positive_strided_access_2(ptr %a, i32 %off) {
; CHECK-LABEL: 'test_invar_dependence_before_via_loop_guard_positive_strided_access_2'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load i32, ptr %gep, align 4 ->
; CHECK-NEXT:            store i32 %l, ptr %a, 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:
  %gep.off = getelementptr i8, ptr %a, i32 %off
  %c = icmp sge i32 %off, 4
  br i1 %c, label %loop, label %exit

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %gep
  store i32 %l, ptr %a
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}
define void @test_invar_dependence_not_before_via_loop_guard_positive_strided_access_1(ptr %a, i32 %off) {
; CHECK-LABEL: 'test_invar_dependence_not_before_via_loop_guard_positive_strided_access_1'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load i32, ptr %a, align 4 ->
; CHECK-NEXT:            store i32 %l, ptr %gep, 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:
  %gep.off = getelementptr i8, ptr %a, i32 %off
  %c = icmp sge i32 %off, 3
  br i1 %c, label %loop, label %exit

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %a
  store i32 %l, ptr %gep
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_not_before_via_loop_guard_positive_strided_access_2(ptr %a, i32 %off) {
; CHECK-LABEL: 'test_invar_dependence_not_before_via_loop_guard_positive_strided_access_2'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load i32, ptr %gep, align 4 ->
; CHECK-NEXT:            store i32 %l, ptr %a, 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:
  %gep.off = getelementptr i8, ptr %a, i32 %off
  %c = icmp sge i32 %off, 3
  br i1 %c, label %loop, label %exit

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %gep
  store i32 %l, ptr %a
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_before_positive_strided_access_via_loop_guard_1(ptr %a, i32 %off) {
; CHECK-LABEL: 'test_invar_dependence_before_positive_strided_access_via_loop_guard_1'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Report: could not determine number of loop iterations
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  %c = icmp sge i32 %off, 0
  br i1 %c, label %loop, label %exit

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %gep
  store i32 %l, ptr %a
  %iv.next = add i32 %iv, %off
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_before_positive_strided_access_via_loop_guard_2(ptr %a, i32 %off) {
; CHECK-LABEL: 'test_invar_dependence_before_positive_strided_access_via_loop_guard_2'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Report: could not determine number of loop iterations
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  %c = icmp sge i32 %off, 0
  br i1 %c, label %loop, label %exit

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %a
  store i32 %l, ptr %gep
  %iv.next = add i32 %iv, %off
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_not_known_beforepositive_strided_access_not_known_via_loop_guard_1(ptr %a, i32 %off) {
; CHECK-LABEL: 'test_invar_dependence_not_known_beforepositive_strided_access_not_known_via_loop_guard_1'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Report: could not determine number of loop iterations
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %a
  store i32 %l, ptr %gep
  %iv.next = add i32 %iv, %off
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_dependence_not_known_beforepositive_strided_access_not_known_via_loop_guard_2(ptr %a, i32 %off) {
; CHECK-LABEL: 'test_invar_dependence_not_known_beforepositive_strided_access_not_known_via_loop_guard_2'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Report: could not determine number of loop iterations
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load i32, ptr %gep
  store i32 %l, ptr %a
  %iv.next = add i32 %iv, %off
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_vector_dependence_before_positive_strided_access_1(ptr %a) {
; CHECK-LABEL: 'test_invar_vector_dependence_before_positive_strided_access_1'
; CHECK-NEXT:    loop:
; CHECK-NEXT:      Memory dependences are safe
; CHECK-NEXT:      Dependences:
; 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load <4 x i8>, ptr %a
  store i32 0, ptr %gep
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}

define void @test_invar_scalable_dependence_before_positive_strided_access_1(ptr %a) {
; CHECK-LABEL: 'test_invar_scalable_dependence_before_positive_strided_access_1'
; 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:  Unknown data dependence.
; CHECK-NEXT:      Dependences:
; CHECK-NEXT:        Unknown:
; CHECK-NEXT:            %l = load <vscale x 4 x i8>, ptr %a, align 4 ->
; CHECK-NEXT:            store i32 0, ptr %gep, 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:
  %gep.off = getelementptr i8, ptr %a, i32 4
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %gep = getelementptr i32, ptr %gep.off, i32 %iv
  %l = load <vscale x 4 x i8>, ptr %a
  store i32 0, ptr %gep
  %iv.next = add i32 %iv, 1
  %ec = icmp eq i32 %iv.next, 100
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}