1d78294250
Vectors of bfloat are a storage format only; you're supposed to
explicitly convert them to a wider type to do arithmetic on them.
But currently, if you write something like
bfloat16x4_t test(bfloat16x4_t a, bfloat16x4_t b) { return a + b; }
then the clang frontend accepts it without error, and (ARM or AArch64)
isel fails to generate code for it.
Added a rule in Sema that forbids the attempt from even being made,
and tests that check it. In particular, we also outlaw arithmetic
between vectors of bfloat and any other vector type.
Patch by Luke Cheeseman.
Reviewed By: LukeGeeson
Differential Revision: https://reviews.llvm.org/D85009
48 lines
3.8 KiB
C++
48 lines
3.8 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 \
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// RUN: -triple aarch64-arm-none-eabi -target-cpu cortex-a75 \
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// RUN: -target-feature +bf16 -target-feature +neon %s
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// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 \
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// RUN: -triple arm-arm-none-eabi -target-cpu cortex-a53 \
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// RUN: -target-feature +bf16 -target-feature +neon %s
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void test(bool b) {
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__bf16 bf16;
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bf16 + bf16; // expected-error {{invalid operands to binary expression ('__bf16' and '__bf16')}}
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bf16 - bf16; // expected-error {{invalid operands to binary expression ('__bf16' and '__bf16')}}
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bf16 * bf16; // expected-error {{invalid operands to binary expression ('__bf16' and '__bf16')}}
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bf16 / bf16; // expected-error {{invalid operands to binary expression ('__bf16' and '__bf16')}}
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__fp16 fp16;
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bf16 + fp16; // expected-error {{invalid operands to binary expression ('__bf16' and '__fp16')}}
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fp16 + bf16; // expected-error {{invalid operands to binary expression ('__fp16' and '__bf16')}}
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bf16 - fp16; // expected-error {{invalid operands to binary expression ('__bf16' and '__fp16')}}
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fp16 - bf16; // expected-error {{invalid operands to binary expression ('__fp16' and '__bf16')}}
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bf16 * fp16; // expected-error {{invalid operands to binary expression ('__bf16' and '__fp16')}}
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fp16 * bf16; // expected-error {{invalid operands to binary expression ('__fp16' and '__bf16')}}
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bf16 / fp16; // expected-error {{invalid operands to binary expression ('__bf16' and '__fp16')}}
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fp16 / bf16; // expected-error {{invalid operands to binary expression ('__fp16' and '__bf16')}}
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bf16 = fp16; // expected-error {{assigning to '__bf16' from incompatible type '__fp16'}}
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fp16 = bf16; // expected-error {{assigning to '__fp16' from incompatible type '__bf16'}}
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bf16 + (b ? fp16 : bf16); // expected-error {{incompatible operand types ('__fp16' and '__bf16')}}
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}
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#include <arm_neon.h>
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void test_vector(bfloat16x4_t a, bfloat16x4_t b, float16x4_t c) {
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a + b; // expected-error {{invalid operands to binary expression ('bfloat16x4_t' (vector of 4 'bfloat16_t' values) and 'bfloat16x4_t')}}
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a - b; // expected-error {{invalid operands to binary expression ('bfloat16x4_t' (vector of 4 'bfloat16_t' values) and 'bfloat16x4_t')}}
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a * b; // expected-error {{invalid operands to binary expression ('bfloat16x4_t' (vector of 4 'bfloat16_t' values) and 'bfloat16x4_t')}}
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a / b; // expected-error {{invalid operands to binary expression ('bfloat16x4_t' (vector of 4 'bfloat16_t' values) and 'bfloat16x4_t')}}
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a + c; // expected-error {{invalid operands to binary expression ('bfloat16x4_t' (vector of 4 'bfloat16_t' values) and 'float16x4_t' (vector of 4 'float16_t' values))}}
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a - c; // expected-error {{invalid operands to binary expression ('bfloat16x4_t' (vector of 4 'bfloat16_t' values) and 'float16x4_t' (vector of 4 'float16_t' values))}}
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a * c; // expected-error {{invalid operands to binary expression ('bfloat16x4_t' (vector of 4 'bfloat16_t' values) and 'float16x4_t' (vector of 4 'float16_t' values))}}
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a / c; // expected-error {{invalid operands to binary expression ('bfloat16x4_t' (vector of 4 'bfloat16_t' values) and 'float16x4_t' (vector of 4 'float16_t' values))}}
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c + b; // expected-error {{invalid operands to binary expression ('float16x4_t' (vector of 4 'float16_t' values) and 'bfloat16x4_t' (vector of 4 'bfloat16_t' values))}}
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c - b; // expected-error {{invalid operands to binary expression ('float16x4_t' (vector of 4 'float16_t' values) and 'bfloat16x4_t' (vector of 4 'bfloat16_t' values))}}
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c * b; // expected-error {{invalid operands to binary expression ('float16x4_t' (vector of 4 'float16_t' values) and 'bfloat16x4_t' (vector of 4 'bfloat16_t' values))}}
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c / b; // expected-error {{invalid operands to binary expression ('float16x4_t' (vector of 4 'float16_t' values) and 'bfloat16x4_t' (vector of 4 'bfloat16_t' values))}}
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}
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