c4d7c82c7f
LLVM supports applying conversion instructions to vectors of the same number of elements (fptrunc, fptosi, etc.) but there had been no way for a Clang user to cause such instructions to be generated when using builtin vector types. C-style casting on vectors is already defined in terms of bitcasts, and so cannot be used for these conversions as well (without leading to a very confusing set of semantics). As a result, this adds a __builtin_convertvector intrinsic (patterned after the OpenCL __builtin_astype intrinsic). This is intended to aid the creation of vector intrinsic headers that create generic IR instead of target-dependent intrinsics (in other words, this is a generic _mm_cvtepi32_ps). As noted in the documentation, the action of __builtin_convertvector is defined in terms of the action of a C-style cast on each vector element. llvm-svn: 190915
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
// RUN: %clang_cc1 %s -triple=i686-apple-darwin9
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// RUN: %clang_cc1 %s -E -triple=i686-apple-darwin9
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#ifndef __has_feature
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#error Should have __has_feature
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#endif
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#if __has_feature(something_we_dont_have)
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#error Bad
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#endif
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#if !__has_builtin(__builtin_huge_val) || \
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!__has_builtin(__builtin_shufflevector) || \
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!__has_builtin(__builtin_convertvector) || \
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!__has_builtin(__builtin_trap) || \
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!__has_builtin(__c11_atomic_init) || \
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!__has_feature(attribute_analyzer_noreturn) || \
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!__has_feature(attribute_overloadable)
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#error Clang should have these
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#endif
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#if __has_builtin(__builtin_insanity)
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#error Clang should not have this
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#endif
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#if !__has_feature(__attribute_deprecated_with_message__)
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#error Feature name in double underscores does not work
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#endif
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// Make sure we have x86 builtins only (forced with target triple).
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#if !__has_builtin(__builtin_ia32_emms) || \
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__has_builtin(__builtin_altivec_abs_v4sf)
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#error Broken handling of target-specific builtins
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#endif
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// Macro expansion does not occur in the parameter to __has_builtin,
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// __has_feature, etc. (as is also expected behaviour for ordinary
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// macros), so the following should not expand:
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#define MY_ALIAS_BUILTIN __c11_atomic_init
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#define MY_ALIAS_FEATURE attribute_overloadable
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#if __has_builtin(MY_ALIAS_BUILTIN) || __has_feature(MY_ALIAS_FEATURE)
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#error Alias expansion not allowed
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#endif
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// But deferring should expand:
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#define HAS_BUILTIN(X) __has_builtin(X)
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#define HAS_FEATURE(X) __has_feature(X)
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#if !HAS_BUILTIN(MY_ALIAS_BUILTIN) || !HAS_FEATURE(MY_ALIAS_FEATURE)
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#error Expansion should have occurred
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#endif
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