1 /// -fno-semantic-interposition is the default and local aliases (via dso_local) are allowed. 2 // RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -mrelocation-model pic -pic-level 1 %s -o - | FileCheck %s --check-prefixes=CHECK,NOMETADATA 3 4 /// -fsemantic-interposition sets a module metadata. 5 // RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -mrelocation-model pic -pic-level 1 -fsemantic-interposition %s -o - | FileCheck %s --check-prefixes=PREEMPT,METADATA 6 7 /// Traditional half-baked behavior: interprocedural optimizations are allowed 8 /// but local aliases are not used. 9 // RUN: %clang_cc1 -triple x86_64-linux-gnu -emit-llvm -mrelocation-model pic -pic-level 1 -fhalf-no-semantic-interposition %s -o - | FileCheck %s --check-prefixes=PREEMPT,NOMETADATA 10 11 // CHECK: @var = global i32 0, align 4 12 // CHECK: @ext_var = external global i32, align 4 13 // CHECK: @ifunc = ifunc i32 (), bitcast (i8* ()* @ifunc_resolver to i32 ()* ()*) 14 // CHECK: define dso_local i32 @func() 15 // CHECK: declare i32 @ext() 16 17 // PREEMPT: @var = global i32 0, align 4 18 // PREEMPT: @ext_var = external global i32, align 4 19 // PREEMPT: @ifunc = ifunc i32 (), bitcast (i8* ()* @ifunc_resolver to i32 ()* ()*) 20 // PREEMPT: define i32 @func() 21 // PREEMPT: declare i32 @ext() 22 23 // METADATA: !{{[0-9]+}} = !{i32 1, !"SemanticInterposition", i32 1} 24 // NOMETADATA-NOT: "SemanticInterposition" 25 26 int var; 27 extern int ext_var; 28 29 int ifunc(void) __attribute__((ifunc("ifunc_resolver"))); 30 31 int func(void) { return 0; } 32 int ext(void); 33 34 static void *ifunc_resolver() { return func; } 35 36 int foo() { 37 return var + ext_var + ifunc() + func() + ext(); 38 } 39