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bolt/deps/llvm-18.1.8/llvm/test/Analysis/LoopAccessAnalysis/loop-invariant-dep-with-backedge-taken-count.ll
Sam Vervaeck 174b6f4d4e
Embed LLVM 18.1.8
2025-02-14 19:21:04 +01:00

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7.9 KiB
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; 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
; 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: 'test_distance_greater_than_BTC_100'
; 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.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:
; 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.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: 'test_distance_much_greater_than_BTC_100'
; 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.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:
; 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.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: 'test_distance_equal_BTC_100'
; 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.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:
; 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.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: 'test_distance_greater_than_BTC_10000'
; 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.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:
; 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.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: 'test_distance_equal_to_BTC_10000'
; 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.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:
; 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.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: 'test_btc_is_unknown_value'
; 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.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-NEXT: Group [[GRP1:0x[0-9a-f]+]]:
; CHECK-NEXT: (Low: (400 + %a) High: (404 + %a))
; CHECK-NEXT: Member: (400 + %a)
; CHECK-NEXT: Group [[GRP2:0x[0-9a-f]+]]:
; CHECK-NEXT: (Low: %a High: (4 + (4 * (zext i32 (-1 + %N) to i64))<nuw><nsw> + %a))
; CHECK-NEXT: Member: {%a,+,4}<nw><%loop>
; CHECK-EMPTY:
; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
; CHECK-NEXT: SCEV assumptions:
; CHECK-NEXT: {0,+,1}<nuw><%loop> Added Flags: <nssw>
; CHECK-EMPTY:
; CHECK-NEXT: Expressions re-written:
; CHECK-NEXT: [PSE] %gep = getelementptr i32, ptr %a, i32 %iv:
; CHECK-NEXT: ((4 * (sext i32 {0,+,1}<nuw><%loop> to i64))<nsw> + %a)
; CHECK-NEXT: --> {%a,+,4}<nw><%loop>
;
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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