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; RUN: opt -passes='print<access-info>' -disable-output %s 2>&1 | FileCheck %s
; Test cases for using the backedge-taken-count to rule out dependencies between
; an invariant and strided accesses.
define void @test_distance_greater_than_BTC_100(ptr %a) {
; CHECK-LABEL: Loop access info in function 'test_distance_greater_than_BTC_100':
; CHECK-NEXT: loop:
; CHECK-NEXT: Report: unsafe dependent memory operations in loop.
; CHECK-NEXT: Unknown data dependence.
; CHECK-NEXT: Dependences:
; CHECK-NEXT: Unknown:
; CHECK-NEXT: %l = load i32, ptr %gep.x, 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:
;
entry:
%gep.x = getelementptr i32, ptr %a, i32 100
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
%gep = getelementptr i32, ptr %a, i32 %iv
%l = load i32, ptr %gep.x
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_distance_much_greater_than_BTC_100(ptr %a) {
; CHECK-LABEL: Loop access info in function 'test_distance_much_greater_than_BTC_100':
; CHECK-NEXT: loop:
; CHECK-NEXT: Report: unsafe dependent memory operations in loop.
; CHECK-NEXT: Unknown data dependence.
; CHECK-NEXT: Dependences:
; CHECK-NEXT: Unknown:
; CHECK-NEXT: %l = load i32, ptr %gep.x, 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:
;
entry:
%gep.x = getelementptr i32, ptr %a, i32 200
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
%gep = getelementptr i32, ptr %a, i32 %iv
%l = load i32, ptr %gep.x
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_distance_equal_BTC_100(ptr %a) {
; CHECK-LABEL: Loop access info in function 'test_distance_equal_BTC_100':
; CHECK-NEXT: loop:
; CHECK-NEXT: Report: unsafe dependent memory operations in loop.
; CHECK-NEXT: Unknown data dependence.
; CHECK-NEXT: Dependences:
; CHECK-NEXT: Unknown:
; CHECK-NEXT: %l = load i32, ptr %gep.x, 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:
;
entry:
%gep.x = getelementptr i32, ptr %a, i32 99
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
%gep = getelementptr i32, ptr %a, i32 %iv
%l = load i32, ptr %gep.x
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_distance_greater_than_BTC_10000(ptr %a) {
; CHECK-LABEL: Loop access info in function 'test_distance_greater_than_BTC_10000':
; CHECK-NEXT: loop:
; CHECK-NEXT: Report: unsafe dependent memory operations in loop.
; CHECK-NEXT: Unknown data dependence.
; CHECK-NEXT: Dependences:
; CHECK-NEXT: Unknown:
; CHECK-NEXT: %l = load i32, ptr %gep.x, 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:
;
entry:
%gep.x = getelementptr i32, ptr %a, i32 10000
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
%gep = getelementptr i32, ptr %a, i32 %iv
%l = load i32, ptr %gep.x
store i32 %l, ptr %gep
%iv.next = add i32 %iv, 1
%ec = icmp eq i32 %iv.next, 10000
br i1 %ec, label %exit, label %loop
exit:
ret void
}
define void @test_distance_equal_to_BTC_10000(ptr %a) {
; CHECK-LABEL: Loop access info in function 'test_distance_equal_to_BTC_10000':
; CHECK-NEXT: loop:
; CHECK-NEXT: Report: unsafe dependent memory operations in loop.
; CHECK-NEXT: Unknown data dependence.
; CHECK-NEXT: Dependences:
; CHECK-NEXT: Unknown:
; CHECK-NEXT: %l = load i32, ptr %gep.x, 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:
;
entry:
%gep.x = getelementptr i32, ptr %a, i32 9999
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
%gep = getelementptr i32, ptr %a, i32 %iv
%l = load i32, ptr %gep.x
store i32 %l, ptr %gep
%iv.next = add i32 %iv, 1
%ec = icmp eq i32 %iv.next, 100000
br i1 %ec, label %exit, label %loop
exit:
ret void
}
define void @test_btc_is_unknown_value(ptr %a, i32 %N) {
; CHECK-LABEL: Loop access info in function 'test_btc_is_unknown_value':
; CHECK-NEXT: loop:
; CHECK-NEXT: Report: unsafe dependent memory operations in loop.
; CHECK-NEXT: Unknown data dependence.
; CHECK-NEXT: Dependences:
; CHECK-NEXT: Unknown:
; CHECK-NEXT: %l = load i32, ptr %gep.x, align 4 ->
; CHECK-NEXT: store i32 %l, ptr %gep, align 4
; CHECK-EMPTY:
; CHECK-NEXT: Run-time memory checks:
; CHECK-NEXT: Grouped accesses:
;
entry:
%gep.x = getelementptr i32, ptr %a, i32 100
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
%gep = getelementptr i32, ptr %a, i32 %iv
%l = load i32, ptr %gep.x
store i32 %l, ptr %gep
%iv.next = add i32 %iv, 1
%ec = icmp eq i32 %iv.next, %N
br i1 %ec, label %exit, label %loop
exit:
ret void
}
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