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