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c86946593e
NOTE: There is a mailing list discussion on this: http://lists.llvm.org/pipermail/llvm-dev/2019-December/137632.html Complemantary to the assumption outliner prototype in D71692, this patch shows how we could simplify the code emitted for an alignemnt assumption. The generated code is smaller, less fragile, and it makes it easier to recognize the additional use as a "assumption use". As mentioned in D71692 and on the mailing list, we could adopt this scheme, and similar schemes for other patterns, without adopting the assumption outlining.
28 lines
1.3 KiB
LLVM
28 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: not opt -verify < %s 2>&1 | FileCheck %s
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declare void @llvm.assume(i1)
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define void @func(i32* %P, i32 %P1, i32* %P2, i32* %P3) {
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; CHECK: tags must be valid attribute names
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call void @llvm.assume(i1 true) ["adazdazd"()]
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; CHECK: the second argument should be a constant integral value
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call void @llvm.assume(i1 true) ["dereferenceable"(i32* %P, i32 %P1)]
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; CHECK: to many arguments
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call void @llvm.assume(i1 true) ["dereferenceable"(i32* %P, i32 8, i32 8)]
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; CHECK: this attribute should have 2 arguments
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call void @llvm.assume(i1 true) ["dereferenceable"(i32* %P)]
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; CHECK: this attribute has no argument
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call void @llvm.assume(i1 true) ["dereferenceable"(i32* %P, i32 4), "cold"(i32* %P)]
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; CHECK: this attribute should have one argument
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call void @llvm.assume(i1 true) ["noalias"()]
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call void @llvm.assume(i1 true) ["align"(i32* %P, i32 %P1, i32 4)]
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; CHECK: alignment assumptions should have 2 or 3 arguments
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call void @llvm.assume(i1 true) ["align"(i32* %P, i32 %P1, i32 4, i32 4)]
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; CHECK: second argument should be an integer
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call void @llvm.assume(i1 true) ["align"(i32* %P, i32* %P2)]
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; CHECK: third argument should be an integer if present
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call void @llvm.assume(i1 true) ["align"(i32* %P, i32 %P1, i32* %P2)]
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ret void
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}
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