1; RUN: llc < %s -mtriple=x86_64-pc-windows-msvc | FileCheck %s 2; RUN: llc < %s -mtriple=x86_64-w64-windows-gnu | FileCheck %s 3; Control Flow Guard is currently only available on Windows 4 5declare dllimport i32 @target_func1() 6declare dllimport i32 @target_func2() 7declare dllimport i32 @target_func3() 8@ptrs = dso_local local_unnamed_addr global [2 x ptr] [ptr @target_func2, ptr @target_func3], align 16 9 10; Test address-taken functions from imported DLLs are correctly added to the 11; Guard Address-Taken IAT Entry (.giats) and Guard Function ID (.gfids) sections. 12define i32 @func_cf_giats1() { 13entry: 14 ; Since it is a dllimport, target_func1 will be represented as "__imp_target_func1" when it is 15 ; stored in the function pointer. Therefore, the .giats section must contain "__imp_target_func1". 16 ; Unlike MSVC, we also have "target_func1" in the .gfids section, since this is not a security risk. 17 %func_ptr = alloca ptr, align 8 18 store ptr @target_func1, ptr %func_ptr, align 8 19 %0 = load ptr, ptr %func_ptr, align 8 20 %1 = call i32 %0() 21 ; target_func2 is called directly from a global array, so should only appear in the .gfids section. 22 %2 = load ptr, ptr @ptrs, align 8 23 %3 = call i32 %2() 24 ; target_func3 is called both via a stored function pointer (as with target_func1) and via a gloabl 25 ; array (as with target_func2), so "target_func3" must appear in .gfids and "__imp_target_func3" in .giats. 26 store ptr @target_func3, ptr %func_ptr, align 8 27 %4 = load ptr, ptr %func_ptr, align 8 28 %5 = call i32 %4() 29 %6 = load ptr, ptr getelementptr inbounds ([2 x ptr], ptr @ptrs, i64 0, i64 1), align 8 30 %7 = call i32 %6() 31 ret i32 %5 32} 33 34; CHECK-LABEL: .section .gfids$y,"dr" 35; CHECK-NEXT: .symidx target_func1 36; CHECK-NEXT: .symidx target_func2 37; CHECK-NEXT: .symidx target_func3 38; CHECK-NOT: .symidx 39; CHECK-LABEL: .section .giats$y,"dr" 40; CHECK-NEXT: .symidx __imp_target_func1 41; CHECK-NEXT: .symidx __imp_target_func3 42; CHECK-NOT: .symidx 43 44!llvm.module.flags = !{!0} 45!0 = !{i32 2, !"cfguard", i32 2} 46