2a6150d932
Previously, our logic when taking the address of an overloaded function would not consider enable_if attributes, so long as all of the enable_if conditions on a given candidate were true. So, two functions with identical signatures (one with enable_if attributes, the other without), would be considered equally good overloads. If we were calling the function instead of taking its address, then the function with enable_if attributes would be preferred. This patch makes us prefer the candidate with enable_if regardless of if we're calling or taking the address of an overloaded function. Differential Revision: http://reviews.llvm.org/D13795 llvm-svn: 250486
83 lines
2.9 KiB
C
83 lines
2.9 KiB
C
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-pc-linux-gnu | FileCheck %s
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// Verifying that we do, in fact, select the correct function in the following
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// cases.
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void foo(int m) __attribute__((overloadable, enable_if(m > 0, "")));
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void foo(int m) __attribute__((overloadable));
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// CHECK-LABEL: define void @test1
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void test1() {
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// CHECK: store void (i32)* @_Z3fooi
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void (*p)(int) = foo;
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// CHECK: store void (i32)* @_Z3fooi
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void (*p2)(int) = &foo;
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// CHECK: store void (i32)* @_Z3fooi
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p = foo;
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// CHECK: store void (i32)* @_Z3fooi
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p = &foo;
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// CHECK: store i8* bitcast (void (i32)* @_Z3fooi to i8*)
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void *vp1 = (void*)&foo;
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// CHECK: store i8* bitcast (void (i32)* @_Z3fooi to i8*)
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void *vp2 = (void*)foo;
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// CHECK: store i8* bitcast (void (i32)* @_Z3fooi to i8*)
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vp1 = (void*)&foo;
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// CHECK: store i8* bitcast (void (i32)* @_Z3fooi to i8*)
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vp1 = (void*)foo;
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}
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void bar(int m) __attribute__((overloadable, enable_if(m > 0, "")));
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void bar(int m) __attribute__((overloadable, enable_if(1, "")));
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// CHECK-LABEL: define void @test2
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void test2() {
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// CHECK: store void (i32)* @_Z3barUa9enable_ifIXLi1EEEi
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void (*p)(int) = bar;
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// CHECK: store void (i32)* @_Z3barUa9enable_ifIXLi1EEEi
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void (*p2)(int) = &bar;
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// CHECK: store void (i32)* @_Z3barUa9enable_ifIXLi1EEEi
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p = bar;
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// CHECK: store void (i32)* @_Z3barUa9enable_ifIXLi1EEEi
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p = &bar;
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// CHECK: store i8* bitcast (void (i32)* @_Z3barUa9enable_ifIXLi1EEEi to i8*)
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void *vp1 = (void*)&bar;
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// CHECK: store i8* bitcast (void (i32)* @_Z3barUa9enable_ifIXLi1EEEi to i8*)
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void *vp2 = (void*)bar;
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// CHECK: store i8* bitcast (void (i32)* @_Z3barUa9enable_ifIXLi1EEEi to i8*)
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vp1 = (void*)&bar;
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// CHECK: store i8* bitcast (void (i32)* @_Z3barUa9enable_ifIXLi1EEEi to i8*)
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vp1 = (void*)bar;
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}
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void baz(int m) __attribute__((overloadable, enable_if(1, "")));
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void baz(int m) __attribute__((overloadable));
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// CHECK-LABEL: define void @test3
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void test3() {
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// CHECK: store void (i32)* @_Z3bazUa9enable_ifIXLi1EEEi
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void (*p)(int) = baz;
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// CHECK: store void (i32)* @_Z3bazUa9enable_ifIXLi1EEEi
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void (*p2)(int) = &baz;
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// CHECK: store void (i32)* @_Z3bazUa9enable_ifIXLi1EEEi
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p = baz;
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// CHECK: store void (i32)* @_Z3bazUa9enable_ifIXLi1EEEi
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p = &baz;
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}
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const int TRUEFACTS = 1;
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void qux(int m) __attribute__((overloadable, enable_if(1, ""),
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enable_if(TRUEFACTS, "")));
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void qux(int m) __attribute__((overloadable, enable_if(1, "")));
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// CHECK-LABEL: define void @test4
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void test4() {
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// CHECK: store void (i32)* @_Z3quxUa9enable_ifIXLi1EEXL_Z9TRUEFACTSEEEi
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void (*p)(int) = qux;
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// CHECK: store void (i32)* @_Z3quxUa9enable_ifIXLi1EEXL_Z9TRUEFACTSEEEi
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void (*p2)(int) = &qux;
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// CHECK: store void (i32)* @_Z3quxUa9enable_ifIXLi1EEXL_Z9TRUEFACTSEEEi
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p = qux;
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// CHECK: store void (i32)* @_Z3quxUa9enable_ifIXLi1EEXL_Z9TRUEFACTSEEEi
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p = &qux;
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}
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