b3fd2ea888
With the current behavior the following example yields a linker error:
"multiple definition of `foo.default'"
// Translation Unit 1
__attribute__((target_clones("dotprod, sve"))) int foo(void) { return 1; }
// Translation Unit 2
int foo(void) { return 0; }
__attribute__((target_version("dotprod"))) int foo(void);
__attribute__((target_version("sve"))) int foo(void);
int bar(void) { return foo(); }
That is because foo.default is generated twice. As a user I don't find
this particularly intuitive. If I wanted the default to be generated in
TU1 I'd rather write target_clones("dotprod, sve", "default")
explicitly.
When changing the code I noticed that the RISC-V target defers the
resolver emission when encountering a target_version definition. This
seems accidental since it only makes sense for AArch64, where we only
emit a resolver once we've processed the entire TU, and only if the
default version is present. I've changed this so that RISC-V immediately
emmits the resolver. I adjusted the codegen tests since the functions
now appear in a different order.
Implements https://github.com/ARM-software/acle/pull/377
83 lines
4.5 KiB
C
83 lines
4.5 KiB
C
// RUN: %clang_cc1 -triple aarch64-linux-gnu -fsyntax-only -verify %s
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void __attribute__((target_clones("fp16+sve2-aes", "sb+sve2-sha3+rcpc3+mops", "rdma"))) no_def(void);
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// expected-warning@+1 {{unsupported 'default' in the 'target_clones' attribute string; 'target_clones' attribute ignored}}
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void __attribute__((target_clones("default+sha3"))) warn1(void);
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// expected-error@+2 {{'target_clones' and 'target_version' attributes are not compatible}}
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// expected-note@+1 {{conflicting attribute is here}}
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void __attribute__((target_version("sve"), target_clones("sme+memtag"))) not_compat(void);
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int redecl(void);
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int __attribute__((target_clones("frintts", "simd+fp", "default"))) redecl(void) { return 1; }
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int __attribute__((target_clones("jscvt+fcma", "rcpc", "default"))) redecl2(void);
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// expected-error@+2 {{'target_clones' attribute does not match previous declaration}}
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// expected-note@-2 {{previous declaration is here}}
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int __attribute__((target_clones("jscvt+fcma", "rcpc"))) redecl2(void) { return 1; }
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int __attribute__((target_clones("sve+dotprod"))) redecl3(void);
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int redecl3(void);
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int __attribute__((target_clones("rng", "fp16fml+fp", "default"))) redecl4(void);
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// expected-error@+2 {{'target_clones' attribute does not match previous declaration}}
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// expected-note@-2 {{previous declaration is here}}
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int __attribute__((target_clones("dit", "bf16+dpb", "default"))) redecl4(void) { return 1; }
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int __attribute__((target_version("flagm2"))) redef2(void) { return 1; }
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// expected-error@+2 {{multiversioned function redeclarations require identical target attributes}}
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// expected-note@-2 {{previous declaration is here}}
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int __attribute__((target_clones("flagm2", "default"))) redef2(void) { return 1; }
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int __attribute__((target_clones("f32mm", "f64mm", "sha2+fp"))) redef3(void) { return 1; }
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// expected-error@+2 {{'target_clones' attribute does not match previous declaration}}
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// expected-note@-2 {{previous declaration is here}}
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int __attribute__((target_clones("f32mm", "sha2+fp", "f64mm"))) redef3(void) { return 1; }
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int __attribute__((target_clones("rdm+lse+rdm", "lse+rdm"))) dup1(void) { return 1; }
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// expected-warning@+1 {{version list contains duplicate entries}}
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int __attribute__((target_clones("rdm+lse+rdm", "rdm+lse+rdm"))) dup2(void) { return 2; }
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// expected-warning@+1 {{version list contains duplicate entries}}
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int __attribute__((target_clones("rcpc2+sve2-aes", "rcpc2+sve2-aes"))) dup3(void) { return 3; }
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// expected-warning@+1 {{version list contains duplicate entries}}
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void __attribute__((target_clones("sha3", "default", "default"))) dup4(void);
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// expected-warning@+2 {{version list contains duplicate entries}}
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// expected-warning@+1 {{version list contains duplicate entries}}
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int __attribute__((target_clones("fp", "fp", "crc+dotprod", "dotprod+crc"))) dup5(void) { return 5; }
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// expected-warning@+1 {{version list contains duplicate entries}}
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int __attribute__((target_clones("fp16+memtag", "memtag+fp16"))) dup6(void) { return 6; }
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// expected-warning@+1 {{unsupported '' in the 'target_clones' attribute string;}}
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void __attribute__((target_clones(""))) empty_target_1(void);
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// expected-warning@+3 {{unsupported 'default' in the 'target_clones' attribute string;}}
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// expected-warning@+2 {{unsupported 'default' in the 'target_clones' attribute string;}}
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// expected-warning@+1 {{version list contains entries that don't impact code generation}}
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void __attribute__((target_clones("default+default"))) empty_target_2(void);
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// expected-warning@+1 {{unsupported '' in the 'target_clones' attribute string;}}
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void __attribute__((target_clones("+sve2")))
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empty_target_3(void);
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// expected-warning@+1 {{unsupported 'bs' in the 'target_clones' attribute string;}}
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void __attribute__((target_clones("sb+bs")))
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empty_target_4(void);
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// expected-warning@+1 {{unsupported '' in the 'target_clones' attribute string;}}
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void __attribute__((target_clones("default", "")))
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empty_target_5(void);
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// expected-warning@+1 {{version list contains duplicate entries}}
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void __attribute__((target_clones("sve2-bitperm", "sve2-bitperm")))
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dupe_normal(void);
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void __attribute__((target_clones("default"), target_clones("memtag+bti"))) dupe_normal2(void);
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int mv_after_use(void);
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int useage(void) {
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return mv_after_use();
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}
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// expected-error@+1 {{function declaration cannot become a multiversioned function after first usage}}
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int __attribute__((target_clones("sve2-sha3+ssbs", "sm4"))) mv_after_use(void) { return 1; }
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// expected-error@+1 {{'main' cannot be a multiversioned function}}
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int __attribute__((target_clones("i8mm"))) main() { return 1; }
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