1 // RUN: %clang_cc1 -triple aarch64-pc-windows-msvc -emit-llvm -o - %s | FileCheck %s 2 // RUN: %clang_cc1 -triple aarch64-pc-windows-msvc -O2 -emit-llvm -o - %s | FileCheck %s 3 // RUN: %clang_cc1 -triple aarch64-pc-windows-msvc -fsanitize=thread -O2 -emit-llvm -o - %s | FileCheck %s --check-prefix=SAN 4 // RUN: %clang_cc1 -triple aarch64-pc-windows-msvc -fsanitize=address -O2 -emit-llvm -o - %s | FileCheck %s --check-prefix=SAN 5 6 // REQUIRES: aarch64-registered-target 7 8 int foo(int) __attribute__ ((ifunc("foo_ifunc"))); 9 10 static int f1(int i) { 11 return i + 1; 12 } 13 14 static int f2(int i) { 15 return i + 2; 16 } 17 18 typedef int (*foo_t)(int); 19 20 volatile int global; 21 22 static foo_t foo_ifunc(void) { 23 return global ? f1 : f2; 24 } 25 26 int bar(void) { 27 return foo(1); 28 } 29 30 extern void goo(void); 31 32 void bar2(void) { 33 goo(); 34 } 35 36 extern void goo(void) __attribute__ ((ifunc("goo_ifunc"))); 37 38 void* goo_ifunc(void) { 39 return 0; 40 } 41 42 /// The ifunc is emitted after its resolver. 43 void *hoo_ifunc(void) { return 0; } 44 extern void hoo(int) __attribute__ ((ifunc("hoo_ifunc"))); 45 46 /// ifunc on Windows is lowered to global pointers and an indirect call. 47 // CHECK: @global = dso_local global i32 0, align 4 48 // CHECK: {{.*}} = internal{{.*}}global{{.*}}poison, align 8 49 /// Register the constructor for initialisation. 50 // CHECK: @llvm.global_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 10, ptr @{{.*}}, ptr null }] 51 52 // CHECK-LABEL: @bar() 53 // CHECK %0 = load ptr, ptr @0, align 8 54 // CHECK %call = call i32 %0(i32 noundef 1) 55 56 // CHECK-LABEL: @bar2() 57 // CHECK %0 = load ptr, ptr getelementptr inbounds ([3 x ptr], ptr @0, i32 0, i32 1), align 8 58 // CHECK call void %0() 59 60 // CHECK: define internal void @{{.*}}() 61 62 // SAN: define {{(dso_local )?}}noalias {{(noundef )?}}ptr @goo_ifunc() {{(local_unnamed_addr )?}} 63 64 // SAN: define {{(dso_local )?}}noalias {{(noundef )?}}ptr @hoo_ifunc() {{(local_unnamed_addr )?}} 65 66 // SAN: define internal {{(fastcc )?}}{{(noundef )?}}nonnull ptr @foo_ifunc() {{(unnamed_addr )?}} 67 68