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[LAA] Add test requiring runtime checks with -max-dependences flag.

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Adds extra test coverage for
https://github.com/llvm/llvm-project/pull/91196.
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Florian Hahn 2025-08-21 17:31:53 +01:00
parent 9576a100ae
commit b5fc4fd009
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1 changed files with 96 additions and 0 deletions
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96
llvm/test/Analysis/LoopAccessAnalysis/runtime-checks-max-dependences.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
; RUN: opt -passes='print<access-info>' -disable-output %s 2>&1 | FileCheck --check-prefix=DEFAULT %s
; RUN: opt -passes='print<access-info>' -disable-output -max-dependences=5 %s 2>&1 | FileCheck --check-prefix=MAXDEP5 %s
define void @dependences_with_strides(ptr %dst, i64 %stride) {
; DEFAULT-LABEL: 'dependences_with_strides'
; DEFAULT-NEXT: loop:
; DEFAULT-NEXT: Memory dependences are safe with run-time checks
; DEFAULT-NEXT: Dependences:
; DEFAULT-NEXT: Run-time memory checks:
; DEFAULT-NEXT: Check 0:
; DEFAULT-NEXT: Comparing group GRP0:
; DEFAULT-NEXT: %ptr.iv = phi ptr [ %dst, %entry ], [ %ptr.iv.next, %loop ]
; DEFAULT-NEXT: Against group GRP1:
; DEFAULT-NEXT: %gep.stride = getelementptr i16, ptr %ptr.iv, i64 %stride
; DEFAULT-NEXT: Check 1:
; DEFAULT-NEXT: Comparing group GRP0:
; DEFAULT-NEXT: %ptr.iv = phi ptr [ %dst, %entry ], [ %ptr.iv.next, %loop ]
; DEFAULT-NEXT: Against group GRP2:
; DEFAULT-NEXT: ptr %dst
; DEFAULT-NEXT: Check 2:
; DEFAULT-NEXT: Comparing group GRP1:
; DEFAULT-NEXT: %gep.stride = getelementptr i16, ptr %ptr.iv, i64 %stride
; DEFAULT-NEXT: Against group GRP2:
; DEFAULT-NEXT: ptr %dst
; DEFAULT-NEXT: Grouped accesses:
; DEFAULT-NEXT: Group GRP0:
; DEFAULT-NEXT: (Low: %dst High: (4 + %dst))
; DEFAULT-NEXT: Member: {%dst,+,2}<nw><%loop>
; DEFAULT-NEXT: Group GRP1:
; DEFAULT-NEXT: (Low: ((2 * %stride) + %dst) High: (4 + (2 * %stride) + %dst))
; DEFAULT-NEXT: Member: {((2 * %stride) + %dst),+,2}<nw><%loop>
; DEFAULT-NEXT: Group GRP2:
; DEFAULT-NEXT: (Low: %dst High: (2 + %dst))
; DEFAULT-NEXT: Member: %dst
; DEFAULT-EMPTY:
; DEFAULT-NEXT: Non vectorizable stores to invariant address were not found in loop.
; DEFAULT-NEXT: SCEV assumptions:
; DEFAULT-EMPTY:
; DEFAULT-NEXT: Expressions re-written:
;
; MAXDEP5-LABEL: 'dependences_with_strides'
; MAXDEP5-NEXT: loop:
; MAXDEP5-NEXT: Memory dependences are safe with run-time checks
; MAXDEP5-NEXT: Too many dependences, not recorded
; MAXDEP5-NEXT: Run-time memory checks:
; MAXDEP5-NEXT: Check 0:
; MAXDEP5-NEXT: Comparing group GRP0:
; MAXDEP5-NEXT: %ptr.iv = phi ptr [ %dst, %entry ], [ %ptr.iv.next, %loop ]
; MAXDEP5-NEXT: Against group GRP1:
; MAXDEP5-NEXT: %gep.stride = getelementptr i16, ptr %ptr.iv, i64 %stride
; MAXDEP5-NEXT: Check 1:
; MAXDEP5-NEXT: Comparing group GRP0:
; MAXDEP5-NEXT: %ptr.iv = phi ptr [ %dst, %entry ], [ %ptr.iv.next, %loop ]
; MAXDEP5-NEXT: Against group GRP2:
; MAXDEP5-NEXT: ptr %dst
; MAXDEP5-NEXT: Check 2:
; MAXDEP5-NEXT: Comparing group GRP1:
; MAXDEP5-NEXT: %gep.stride = getelementptr i16, ptr %ptr.iv, i64 %stride
; MAXDEP5-NEXT: Against group GRP2:
; MAXDEP5-NEXT: ptr %dst
; MAXDEP5-NEXT: Grouped accesses:
; MAXDEP5-NEXT: Group GRP0:
; MAXDEP5-NEXT: (Low: %dst High: (4 + %dst))
; MAXDEP5-NEXT: Member: {%dst,+,2}<nw><%loop>
; MAXDEP5-NEXT: Group GRP1:
; MAXDEP5-NEXT: (Low: ((2 * %stride) + %dst) High: (4 + (2 * %stride) + %dst))
; MAXDEP5-NEXT: Member: {((2 * %stride) + %dst),+,2}<nw><%loop>
; MAXDEP5-NEXT: Group GRP2:
; MAXDEP5-NEXT: (Low: %dst High: (2 + %dst))
; MAXDEP5-NEXT: Member: %dst
; MAXDEP5-EMPTY:
; MAXDEP5-NEXT: Non vectorizable stores to invariant address were not found in loop.
; MAXDEP5-NEXT: SCEV assumptions:
; MAXDEP5-EMPTY:
; MAXDEP5-NEXT: Expressions re-written:
;
entry:
br label %loop
loop:
%iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
%ptr.iv = phi ptr [ %dst, %entry ], [ %ptr.iv.next, %loop ]
store i16 0, ptr %ptr.iv, align 2
%gep.stride = getelementptr i16, ptr %ptr.iv, i64 %stride
store i16 0, ptr %gep.stride, align 2
store i16 0, ptr %dst, align 2
store i16 0, ptr %ptr.iv, align 2
%ptr.iv.next = getelementptr i8, ptr %ptr.iv, i64 2
%iv.next = add i32 %iv, 1
%exitcond.not = icmp eq i32 %iv, 1
br i1 %exitcond.not, label %exit, label %loop
exit:
ret void
}