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19cfa09971
This reverts commit 329aeb5db43f5e69df038fb20d2def77fe6f8595, and relands commit 61f006ac655431bd44b9e089f74c73bec0c1a48c. This is a continuation of D89456. As it was suggested there, now that SCEV models `PtrToInt`, we can try to improve SCEV's pointer handling. In particular, i believe, i will need this in the future to further fix `SCEVAddExpr`operation type handling. This removes special handling of `ConstantPointerNull` from `ScalarEvolution::createSCEV()`, and add constant folding into `ScalarEvolution::getPtrToIntExpr()`. This way, `null` constants stay as such in SCEV's, but gracefully become zero integers when asked. Reviewed By: Meinersbur Differential Revision: https://reviews.llvm.org/D98147
18 lines
930 B
LLVM
18 lines
930 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
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; RUN: opt -scalar-evolution -analyze -enable-new-pm=0 < %s | FileCheck %s
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; RUN: opt "-passes=print<scalar-evolution>" -disable-output < %s 2>&1 | FileCheck %s
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define void @a(<vscale x 1 x i64> *%p) {
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; CHECK-LABEL: 'a'
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; CHECK-NEXT: Classifying expressions for: @a
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; CHECK-NEXT: %1 = getelementptr <vscale x 4 x i32>, <vscale x 4 x i32>* null, i32 3
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; CHECK-NEXT: --> ((3 * sizeof(<vscale x 4 x i32>)) + null) U: [0,-15) S: [-9223372036854775808,9223372036854775793)
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; CHECK-NEXT: %2 = getelementptr <vscale x 1 x i64>, <vscale x 1 x i64>* %p, i32 1
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; CHECK-NEXT: --> (sizeof(<vscale x 1 x i64>) + %p) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @a
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;
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getelementptr <vscale x 4 x i32>, <vscale x 4 x i32> *null, i32 3
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getelementptr <vscale x 1 x i64>, <vscale x 1 x i64> *%p, i32 1
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ret void
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}
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