15709991d0
match the feature set of the function that they're being called from.
This ensures that we can effectively diagnose some[1] code that would
instead ICE in the backend with a failure to select message.
Example:
__m128d foo(__m128d a, __m128d b) {
return __builtin_ia32_addsubps(b, a);
}
compiled for normal x86_64 via:
clang -target x86_64-linux-gnu -c
would fail to compile in the back end because the normal subtarget
features for x86_64 only include sse2 and the builtin requires sse3.
[1] We're still not erroring on:
__m128i bar(__m128i const *p) { return _mm_lddqu_si128(p); }
where we should fail and error on an always_inline function being
inlined into a function that doesn't support the subtarget features
required.
llvm-svn: 250473
14 lines
470 B
C
14 lines
470 B
C
// RUN: %clang_cc1 %s -triple=x86_64-linux-gnu -S -verify -o -
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#define __MM_MALLOC_H
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#include <x86intrin.h>
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// Since we do code generation on a function level this needs to error out since
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// the subtarget feature won't be available.
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__m256d wombat(__m128i a) {
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if (__builtin_cpu_supports("avx"))
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return __builtin_ia32_cvtdq2pd256((__v4si)a); // expected-error {{'__builtin_ia32_cvtdq2pd256' needs target feature avx}}
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else
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return (__m256d){0, 0, 0, 0};
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}
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