96509bb98f
As per [1] the indices for a matrix element access operator shall have integral or unscoped enumeration types and be non-negative. At the moment, the index expression is converted to SizeType irrespective of the signedness of the index expression. This causes implicit sign conversion warnings if any of the indices is signed. As per the spec, using signed types as indices is allowed and should not cause any warnings. If the index expression is signed, extend to SignedSizeType to avoid the warning. [1] https://clang.llvm.org/docs/MatrixTypes.html#matrix-type-element-access-operator PR: https://github.com/llvm/llvm-project/pull/103044
18 lines
616 B
C++
18 lines
616 B
C++
// RUN: %clang_cc1 -triple arm64-apple-macosx -std=c++11 -fenable-matrix -fsyntax-only -verify -Wsign-conversion %s
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template <typename T, int R, int C> using m __attribute__((__matrix_type__(R,C))) = T;
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double index1(m<double,3,1> X, int i) { return X[i][0]; }
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double index2(m<double,3,1> X, unsigned i) { return X[i][0]; }
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double index3(m<double,3,1> X, char i) { return X[i][0]; }
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double index4(m<double,3,1> X, int i) { return X[0][i]; }
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double index5(m<double,3,1> X, unsigned i) { return X[0][i]; }
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double index6(m<double,3,1> X, char i) { return X[0][i]; }
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// expected-no-diagnostics
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