4431d64c10
Extension vectors now can be used in element-wise conditional selector. For example: ``` R[i] = C[i]? A[i] : B[i] ``` This feature was previously only enabled in OpenCL C. Now it's also available in C. Not that it has different behaviors than GNU vectors (i.e. __vector_size__). Extension vectors selects on signdness of the vector. GNU vectors on the other hand do normal bool conversions. Also, this feature is not available in C++. Differential Revision: https://reviews.llvm.org/D80574
47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify -Wno-unreachable-code %s
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typedef __attribute__(( ext_vector_type(4) )) int int4;
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static int4 test1() {
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int4 vec, rv;
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// comparisons to self...
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return vec == vec; // expected-warning{{self-comparison always evaluates to true}}
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return vec != vec; // expected-warning{{self-comparison always evaluates to false}}
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return vec < vec; // expected-warning{{self-comparison always evaluates to false}}
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return vec <= vec; // expected-warning{{self-comparison always evaluates to true}}
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return vec > vec; // expected-warning{{self-comparison always evaluates to false}}
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return vec >= vec; // expected-warning{{self-comparison always evaluates to true}}
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}
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typedef __attribute__(( ext_vector_type(4) )) float float4;
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static int4 test2() {
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float4 vec, rv;
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// comparisons to self. no warning, they're floats
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return vec == vec; // no-warning
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return vec != vec; // no-warning
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return vec < vec; // no-warning
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return vec <= vec; // no-warning
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return vec > vec; // no-warning
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return vec >= vec; // no-warning
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}
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static int4 test3() {
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int4 i0, i1;
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return i0 > i1 ? i0 : i1; // no-error
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return i0 ? i0 : i1; // no-error
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}
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static float4 test4() {
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float4 f0, f1;
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// This would actually generate implicit casting warning
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// under Weverything flag but we don't really care here
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return f0 > f1 ? f0 : f1; // no-error
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return f0 ? f0 : f1; // expected-error {{used type 'float4' (vector of 4 'float' values) where floating point type is not allowed}}
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}
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