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llvm-project/clang/test/SemaCXX/vector-no-lax.cpp

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For PR17164: split -fno-lax-vector-conversion into three different levels: -- none: no lax vector conversions [new GCC default] -- integer: only conversions between integer vectors [old GCC default] -- all: all conversions between same-size vectors [Clang default] For now, Clang still defaults to "all" mode, but per my proposal on cfe-dev (2019-04-10) the default will be changed to "integer" as soon as that doesn't break lots of testcases. (Eventually I'd like to change the default to "none" to match GCC and general sanity.) Following GCC's behavior, the driver flag -flax-vector-conversions is translated to -flax-vector-conversions=integer. This reinstates r371805, reverted in r371813, with an additional fix for lldb. llvm-svn: 371817
2019-09-13 14:02:15 +08:00
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsyntax-only -flax-vector-conversions=none -verify %s
With lax vector conversions (the default) make sure we convert between two vectors that are the same size. Fix up testcases accordingly and add a new one to make sure we still error if lax vector conversions are disabled. Fixes rdar://8328190 llvm-svn: 112122
2010-08-26 08:42:16 +08:00
typedef unsigned int __attribute__((vector_size (16))) vUInt32;
typedef int __attribute__((vector_size (16))) vSInt32;
vSInt32 foo (vUInt32 a) {
vSInt32 b = { 0, 0, 0, 0 };
[Sema] Support implicit scalar to vector conversions This patch teaches clang to perform implicit scalar to vector conversions when one of the operands of a binary vector expression is a scalar which can be converted to the element type of the vector without truncation following GCC's implementation. If the (constant) scalar is can be casted safely, it is implicitly casted to the vector elements type and splatted to produce a vector of the same type. Contributions from: Petar Jovanovic Reviewers: bruno, vkalintiris Differential Revision: https://reviews.llvm.org/D25866 llvm-svn: 302935
2017-05-13 03:11:06 +08:00
b += a; // expected-error{{cannot convert between vector type 'vUInt32' (vector of 4 'unsigned int' values) and vector type 'vSInt32' (vector of 4 'int' values) as implicit conversion would cause truncation}}
With lax vector conversions (the default) make sure we convert between two vectors that are the same size. Fix up testcases accordingly and add a new one to make sure we still error if lax vector conversions are disabled. Fixes rdar://8328190 llvm-svn: 112122
2010-08-26 08:42:16 +08:00
return b;
}