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7304f0a66e
Declarations without the attribute were disallowed because it would be
ambiguous which 'target' it was supposed to be on. For example:
void ___attribute__((target("v1"))) foo();
void foo(); // Redecl of above, or fwd decl of below?
void ___attribute__((target("v2"))) foo();
However, a first declaration doesn't have that problem, and erroring
prevents it from working in cases where the forward declaration is
useful.
Additionally, a forward declaration of target==default wouldn't properly
cause multiversioning, so this patch fixes that.
The patch was not split since the 'default' fix would require
implementing the same check for that case, followed by undoing the same
change for the fwd-decl implementation.
Change-Id: I66f2c5bc2477bcd3f7544b9c16c83ece257077b0
llvm-svn: 347805
103 lines
4.9 KiB
C
103 lines
4.9 KiB
C
// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsyntax-only -verify %s
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void __attribute__((target("sse4.2"))) no_default(void);
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void __attribute__((target("arch=sandybridge"))) no_default(void);
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void use1(void){
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// expected-error@+1 {{no matching function for call to 'no_default'}}
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no_default();
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}
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void __attribute__((target("sse4.2"))) has_def(void);
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void __attribute__((target("default"))) has_def(void);
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void use2(void){
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// expected-error@+2 {{reference to overloaded function could not be resolved; did you mean to call it?}}
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// expected-note@-4 {{possible target for call}}
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+has_def;
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}
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int __attribute__((target("sse4.2"))) no_proto();
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// expected-error@-1 {{multiversioned function must have a prototype}}
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// expected-note@+1 {{function multiversioning caused by this declaration}}
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int __attribute__((target("arch=sandybridge"))) no_proto();
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// The following should all be legal, since they are just redeclarations.
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int __attribute__((target("sse4.2"))) redecl1(void);
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int __attribute__((target("sse4.2"))) redecl1(void) { return 1; }
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int __attribute__((target("arch=sandybridge"))) redecl1(void) { return 2; }
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int __attribute__((target("sse4.2"))) redecl2(void) { return 1; }
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int __attribute__((target("sse4.2"))) redecl2(void);
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int __attribute__((target("arch=sandybridge"))) redecl2(void) { return 2; }
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int __attribute__((target("sse4.2"))) redecl3(void) { return 0; }
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int __attribute__((target("arch=ivybridge"))) redecl3(void) { return 1; }
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int __attribute__((target("arch=sandybridge"))) redecl3(void);
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int __attribute__((target("arch=sandybridge"))) redecl3(void) { return 2; }
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int __attribute__((target("sse4.2"))) redecl4(void) { return 1; }
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int __attribute__((target("arch=sandybridge"))) redecl4(void) { return 2; }
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int __attribute__((target("arch=sandybridge"))) redecl4(void);
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int __attribute__((target("sse4.2"))) redef(void) { return 1; }
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int __attribute__((target("arch=ivybridge"))) redef(void) { return 1; }
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int __attribute__((target("arch=sandybridge"))) redef(void) { return 2; }
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// expected-error@+2 {{redefinition of 'redef'}}
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// expected-note@-2 {{previous definition is here}}
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int __attribute__((target("arch=sandybridge"))) redef(void) { return 2; }
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int __attribute__((target("default"))) redef2(void) { return 1;}
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// expected-error@+2 {{redefinition of 'redef2'}}
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// expected-note@-2 {{previous definition is here}}
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int __attribute__((target("default"))) redef2(void) { return 1;}
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int __attribute__((target("sse4.2"))) mv_after_use(void) { return 1; }
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int use3(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("arch=sandybridge"))) mv_after_use(void) { return 2; }
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int __attribute__((target("sse4.2,arch=sandybridge"))) mangle(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("arch=sandybridge,sse4.2"))) mangle(void) { return 2; }
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// allow this, since we want to treat the 1st one as fwd-decl of the sandybridge version.
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int prev_no_target(void);
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int __attribute__((target("arch=sandybridge"))) prev_no_target(void) { return 2; }
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int __attribute__((target("arch=ivybridge"))) prev_no_target(void) { return 2; }
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int __attribute__((target("arch=sandybridge"))) prev_no_target2(void);
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int prev_no_target2(void);
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// expected-error@-1 {{function declaration is missing 'target' attribute in a multiversioned function}}
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// expected-note@+1 {{function multiversioning caused by this declaration}}
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int __attribute__((target("arch=ivybridge"))) prev_no_target2(void);
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void __attribute__((target("sse4.2"))) addtl_attrs(void);
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//expected-error@+1 {{attribute 'target' multiversioning cannot be combined}}
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void __attribute__((used,target("arch=sandybridge"))) addtl_attrs(void);
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//expected-error@+1 {{attribute 'target' multiversioning cannot be combined}}
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void __attribute__((target("default"), used)) addtl_attrs2(void);
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//expected-error@+2 {{attribute 'target' multiversioning cannot be combined}}
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//expected-note@+2 {{function multiversioning caused by this declaration}}
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void __attribute__((used,target("sse4.2"))) addtl_attrs3(void);
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void __attribute__((target("arch=sandybridge"))) addtl_attrs3(void);
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void __attribute__((target("sse4.2"))) addtl_attrs4(void);
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void __attribute__((target("arch=sandybridge"))) addtl_attrs4(void);
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//expected-error@+1 {{attribute 'target' multiversioning cannot be combined}}
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void __attribute__((used,target("arch=ivybridge"))) addtl_attrs4(void);
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int __attribute__((target("sse4.2"))) diff_cc(void);
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// expected-error@+1 {{multiversioned function declaration has a different calling convention}}
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__vectorcall int __attribute__((target("arch=sandybridge"))) diff_cc(void);
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int __attribute__((target("sse4.2"))) diff_ret(void);
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// expected-error@+1 {{multiversioned function declaration has a different return type}}
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short __attribute__((target("arch=sandybridge"))) diff_ret(void);
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