forked from OSchip/llvm-project
79 lines
2.8 KiB
LLVM
79 lines
2.8 KiB
LLVM
; RUN: opt %loadPolly -polly-scops -analyze < %s \
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; RUN: -polly-invariant-load-hoisting \
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; RUN: | FileCheck %s
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; Verify that nested arrays with invariant base pointers are handled correctly.
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; Specifically, we currently do not canonicalize arrays where some accesses are
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; hoisted as invariant loads. If we would, we need to update the access function
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; of the invariant loads as well. However, as this is not a very common
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; situation, we leave this for now to avoid further complexity increases.
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;
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; In this test case the arrays baseA1 and baseA2 could be canonicalized to a
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; single array, but there is also an invariant access to baseA1[0] through
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; "%v0 = load float, float* %ptr" which prevents the canonicalization.
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; CHECK: Invariant Accesses: {
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; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: { Stmt_body2[i0] -> MemRef_A[0] };
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; CHECK-NEXT: Execution Context: { : }
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; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: { Stmt_body1[i0] -> MemRef_baseA1[0] };
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; CHECK-NEXT: Execution Context: { : }
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; CHECK-NEXT: }
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; CHECK: Statements {
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; CHECK-NEXT: Stmt_body1
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; CHECK-NEXT: Domain :=
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; CHECK-NEXT: { Stmt_body1[i0] : 0 <= i0 <= 1021 };
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; CHECK-NEXT: Schedule :=
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; CHECK-NEXT: { Stmt_body1[i0] -> [i0, 0] };
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; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: { Stmt_body1[i0] -> MemRef_baseA1[1 + i0] };
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; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: { Stmt_body1[i0] -> MemRef_B[0] };
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; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: { Stmt_body1[i0] -> MemRef_B[0] };
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; CHECK-NEXT: Stmt_body2
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; CHECK-NEXT: Domain :=
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; CHECK-NEXT: { Stmt_body2[i0] : 0 <= i0 <= 1021 };
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; CHECK-NEXT: Schedule :=
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; CHECK-NEXT: { Stmt_body2[i0] -> [i0, 1] };
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; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
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; CHECK-NEXT: { Stmt_body2[i0] -> MemRef_baseA2[0] };
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; CHECK-NEXT: }
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define void @foo(float** %A, float* %B) {
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start:
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br label %loop
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loop:
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%indvar = phi i64 [1, %start], [%indvar.next, %latch]
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%indvar.next = add nsw i64 %indvar, 1
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%icmp = icmp slt i64 %indvar.next, 1024
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br i1 %icmp, label %body1, label %exit
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body1:
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%baseA1 = load float*, float** %A
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%ptr = getelementptr inbounds float, float* %baseA1, i64 %indvar
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%v0 = load float, float* %ptr
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%v1 = load float, float* %baseA1
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store float %v0, float* %B
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store float %v1, float* %B
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br label %body2
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body2:
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%baseA2 = load float*, float** %A
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store float undef, float* %baseA2
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br label %body3
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body3:
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br label %latch
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latch:
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br label %loop
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exit:
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ret void
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}
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