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[Metadata] Extend 'count' field of DISubrange to take a metadata node Summary: This patch extends the DISubrange 'count' field to take either a (signed) constant integer value or a reference to a DILocalVariable or DIGlobalVariable. This is patch [1/3] in a series to extend LLVM's DISubrange Metadata node to support debugging of C99 variable length arrays and vectors with runtime length like the Scalable Vector Extension for AArch64. It is also a first step towards representing more complex cases like arrays in Fortran. Reviewers: echristo, pcc, aprantl, dexonsmith, clayborg, kristof.beyls, dblaikie Reviewed By: aprantl Subscribers: rnk, probinson, fhahn, aemerson, rengolin, JDevlieghere, llvm-commits Differential Revision: https://reviews.llvm.org/D41695 llvm-svn: 323313
2018-01-24 17:56:07 +08:00
; RUN: not llvm-as < %s -disable-output 2>&1 | FileCheck %s
; CHECK: [[@LINE+1]]:{{[0-9]+}}: error: 'count' cannot be null
!0 = !DISubrange(count: null)