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llvm-project/clang/test/Headers/altivec-intrin.c

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[PATCH][Power] Fix (and deprecate) vec_lvsl and vec_lvsr for little endian The use of the vec_lvsl and vec_lvsr interfaces are discouraged for little endian targets since Power8 hardware is a minimum requirement, and Power8 provides reasonable performance for unaligned vector loads and stores. Up till now we have not provided "correct" (i.e., big- endian-compatible) code generation for these interfaces, as to do so produces poorly performing code. However, this has become the source of too many questions. With this patch, LLVM will now produce compatible code for these interfaces, but will also produce a deprecation warning message for PPC64LE when one of them is used. This should make the porting direction clearer to programmers. A similar patch has recently been committed to GCC. This patch includes a test for the warning message. There is a companion patch that adds two unit tests to projects/test-suite. llvm-svn: 219137
2014-10-07 03:02:20 +08:00
// RUN: %clang_cc1 -triple powerpc64le-unknown-linux-gnu -target-cpu power8 \
Remove the -faltivec alias option and replace it with -maltivec everywhere. The alias was only ever used on darwin and had some issues there, and isn't used in practice much. Also fixes a problem with -mno-altivec not turning off -maltivec. Also add a diagnostic for faltivec/fno-altivec that directs users to use maltivec options and include the altivec.h file explicitly. llvm-svn: 298449
2017-03-22 06:06:18 +08:00
// RUN: -target-feature +altivec -verify %s
[PATCH][Power] Fix (and deprecate) vec_lvsl and vec_lvsr for little endian The use of the vec_lvsl and vec_lvsr interfaces are discouraged for little endian targets since Power8 hardware is a minimum requirement, and Power8 provides reasonable performance for unaligned vector loads and stores. Up till now we have not provided "correct" (i.e., big- endian-compatible) code generation for these interfaces, as to do so produces poorly performing code. However, this has become the source of too many questions. With this patch, LLVM will now produce compatible code for these interfaces, but will also produce a deprecation warning message for PPC64LE when one of them is used. This should make the porting direction clearer to programmers. A similar patch has recently been committed to GCC. This patch includes a test for the warning message. There is a companion patch that adds two unit tests to projects/test-suite. llvm-svn: 219137
2014-10-07 03:02:20 +08:00
// Test special behavior of Altivec intrinsics in this file.
#include <altivec.h>
__attribute__((__aligned__(16))) float x[20];
int main()
{
vector unsigned char l = vec_lvsl (0, &x[1]); // expected-warning {{is deprecated: use assignment for unaligned little endian loads/stores}}
vector unsigned char r = vec_lvsr (0, &x[1]); // expected-warning {{is deprecated: use assignment for unaligned little endian loads/stores}}
}
// FIXME: As noted in ms-intrin.cpp, it would be nice if we didn't have to
// hard-code the line number from altivec.h here.
[PowerPC] This revision adds 68 of the missing "Predefined Functions for Vector Programming" from appendix A of the OpenPOWER ABI for Linux Supplement document. I also added tests for the new functions and updated another test that was looking for specific line numbers in error messages from altivec.h. https://llvm.org/bugs/show_bug.cgi?id=23679 http://reviews.llvm.org/D10131 llvm-svn: 239066
2015-06-05 02:45:44 +08:00
// expected-note@altivec.h:* {{deprecated here}}
// expected-note@altivec.h:* {{deprecated here}}