2ebe18b609
Before r266366, clang used to support constructs like: typedef __attribute__((vector_size(8))) double float64x1_t; typedef __attribute__((vector_size(16))) double float64x2_t; float64x1_t vget_low_f64(float64x2_t __p0); double y = 3.0 + vget_low_f64(v); But it would reject: double y = vget_low_f64(v) + 3.0; It also always rejected assignments: double y = vget_low_f64(v); This patch: (a) revivies the behavior of `3.0 + vget_low_f64(v)` prior to r266366, (b) add support for `vget_low_f64(v) + 3.0` and (c) add support for assignments. These vector semantics have never really been tied up but it seems odd that we used to support some binop froms but do not support assignment. If we did support scalar for the purposes of arithmetic, we should probably be able to reinterpret as scalar for the purposes of assignment too. Differential Revision: http://reviews.llvm.org/D21700 rdar://problem/26093791 llvm-svn: 274646
78 lines
3.1 KiB
C
78 lines
3.1 KiB
C
// RUN: %clang_cc1 -fsyntax-only %s -verify -Wvector-conversion
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typedef long long t1 __attribute__ ((vector_size (8)));
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typedef char t2 __attribute__ ((vector_size (16)));
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typedef float t3 __attribute__ ((vector_size (16)));
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typedef short s2 __attribute__ ((vector_size(4)));
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typedef enum { Evalue = 0x10000 } E;
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void f()
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{
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t1 v1;
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t2 v2;
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t3 v3;
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s2 v4;
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E e;
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e = (E)v4;
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v4 = (s2)e;
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v2 = (t2)v1; // expected-error {{invalid conversion between vector type \
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't2' (vector of 16 'char' values) and 't1' (vector of 1 'long long' value) of different size}}
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v1 = (t1)v2; // expected-error {{invalid conversion between vector type \
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't1' (vector of 1 'long long' value) and 't2' (vector of 16 'char' values) of different size}}
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v3 = (t3)v2;
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v1 = (t1)(char *)10; // expected-error {{invalid conversion between vector \
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type 't1' (vector of 1 'long long' value) and scalar type 'char *'}}
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v1 = (t1)(long long)10;
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v1 = (t1)(short)10; // expected-error {{invalid conversion between vector \
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type 't1' (vector of 1 'long long' value) and integer type 'short' of different size}}
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long long r1 = (long long)v1;
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short r2 = (short)v1; // expected-error {{invalid conversion between vector \
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type 't1' (vector of 1 'long long' value) and integer type 'short' of different size}}
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char *r3 = (char *)v1; // expected-error {{invalid conversion between vector\
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type 't1' (vector of 1 'long long' value) and scalar type 'char *'}}
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}
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void f2(t2 X); // expected-note{{passing argument to parameter 'X' here}}
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void f3(t3 Y) {
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f2(Y); // expected-warning {{incompatible vector types passing 't3' (vector of 4 'float' values) to parameter of type 't2' (vector of 16 'char' values)}}
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}
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typedef float float2 __attribute__ ((vector_size (8)));
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typedef __attribute__((vector_size(8))) double float64x1_t;
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typedef __attribute__((vector_size(16))) double float64x2_t;
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float64x1_t vget_low_f64(float64x2_t __p0);
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void f4() {
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float2 f2;
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double d, a, b, c;
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float64x2_t v = {0.0, 1.0};
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f2 += d;
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a = 3.0 + vget_low_f64(v);
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b = vget_low_f64(v) + 3.0;
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c = vget_low_f64(v);
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// LAX conversions within compound assignments are not supported.
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// FIXME: This diagnostic is inaccurate.
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d += f2; // expected-error {{cannot convert between vector values of different size}}
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c -= vget_low_f64(v); // expected-error {{cannot convert between vector values of different size}}
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// LAX conversions between scalar and vector types require same size and one element sized vectors.
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d = f2; // expected-error {{assigning to 'double' from incompatible type 'float2'}}
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d = d + f2; // expected-error {{assigning to 'double' from incompatible type 'float2'}}
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}
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// rdar://15931426
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// Don't permit a lax conversion to and from a pointer type.
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typedef short short_sizeof_pointer __attribute__((vector_size(sizeof(void*))));
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void f5() {
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short_sizeof_pointer v;
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void *ptr;
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v = ptr; // expected-error-re {{assigning to 'short_sizeof_pointer' (vector of {{[0-9]+}} 'short' values) from incompatible type 'void *'}}
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ptr = v; // expected-error {{assigning to 'void *' from incompatible type 'short_sizeof_pointer'}}
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}
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