68 lines · c
1// RUN: %clang_cc1 -triple aarch64-pc-windows-msvc -emit-llvm -o - %s | FileCheck %s2// RUN: %clang_cc1 -triple aarch64-pc-windows-msvc -O2 -emit-llvm -o - %s | FileCheck %s3// RUN: %clang_cc1 -triple aarch64-pc-windows-msvc -fsanitize=thread -O2 -emit-llvm -o - %s | FileCheck %s --check-prefix=SAN4// RUN: %clang_cc1 -triple aarch64-pc-windows-msvc -fsanitize=address -O2 -emit-llvm -o - %s | FileCheck %s --check-prefix=SAN5 6// REQUIRES: aarch64-registered-target7 8int foo(int) __attribute__ ((ifunc("foo_ifunc")));9 10static int f1(int i) {11 return i + 1;12}13 14static int f2(int i) {15 return i + 2;16}17 18typedef int (*foo_t)(int);19 20volatile int global;21 22static foo_t foo_ifunc(void) {23 return global ? f1 : f2;24}25 26int bar(void) {27 return foo(1);28}29 30extern void goo(void);31 32void bar2(void) {33 goo();34}35 36extern void goo(void) __attribute__ ((ifunc("goo_ifunc")));37 38void* goo_ifunc(void) {39 return 0;40}41 42/// The ifunc is emitted after its resolver.43void *hoo_ifunc(void) { return 0; }44extern 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 448// CHECK: {{.*}} = internal{{.*}}global{{.*}}poison, align 849/// 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 854// 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 858// 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