0e370cf1a7
Since -polly-codegen reports itself to preserve DependenceInfo and IslAstInfo, we might get those analysis that were computed by a different ScopInfo for a different Scop structure. This would be unfortunate because DependenceInfo and IslAstInfo hold references to resources allocated by ScopInfo/ScopBuilder/Scop (e.g. isl_id). If -polly-codegen and DependenceInfo/IslAstInfo do not agree on which Scop to use, unpredictable things can happen. When the ScopInfo/Scop object is freed, there is a high probability that the new ScopInfo/Scop object will be created at the same heap position with the same address. Comparing whether the Scop or ScopInfo address is the expected therefore is unreliable. Instead, we compare the address of the isl_ctx object. Both, DependenceInfo and IslAstInfo must hold a reference to the isl_ctx object to ensure it is not freed before the destruction of those analyses which might happen after the destruction of the Scop/ScopInfo they refer to. Hence, the isl_ctx will not be freed and its address not reused as long there is a DependenceInfo or IslAstInfo around. This fixes llvm.org/PR34441 llvm-svn: 313842
43 lines
1.4 KiB
LLVM
43 lines
1.4 KiB
LLVM
; RUN: opt %loadPolly -polly-ignore-aliasing -polly-invariant-load-hoisting=true -polly-scops -polly-import-jscop -polly-codegen -analyze < %s | FileCheck %s
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;
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; This violated an assertion in setNewAccessRelation that assumed base pointers
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; to be load-hoisted. Without this assertion, it codegen would generate invalid
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; code.
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;
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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define void @base_pointer_load_is_inst_inside_invariant_1(i64 %n, float** %A) {
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entry:
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br label %for.i
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for.i:
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%indvar.i = phi i64 [ %indvar.i.next, %for.i.inc ], [ 0, %entry ]
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br label %S1
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S1:
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%ptr = load float*, float** %A
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%conv = sitofp i64 %indvar.i to float
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%arrayidx5 = getelementptr float, float* %ptr, i64 %indvar.i
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store float %conv, float* %arrayidx5, align 4
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br label %for.i.inc
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for.i.inc:
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%indvar.i.next = add i64 %indvar.i, 1
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%exitcond.i = icmp ne i64 %indvar.i.next, %n
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br i1 %exitcond.i, label %for.i, label %exit
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exit:
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ret void
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}
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; Detected by -polly-detect with required load hoist.
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; CHECK-NOT: Valid Region for Scop: for.i => exit
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;
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; Load hoist if %ptr by -polly-scops.
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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: [n] -> { Stmt_S1[i0] -> MemRef_A[0] };
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; CHECK-NEXT: Execution Context: [n] -> { : n > 0 }
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; CHECK-NEXT: }
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