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8382ecd17d
As the actual MSVC toolset doesn't use the GAS-style assembly that Clang/LLVM produces and consumes, there's no reference for what string to use for e.g. comments when building with a MSVC triple. This frees up the use of semicolon as separator string, just like was done for GNU targets in 23413195649d0cf6f3860ae8b5fb115b35032075. (Previously, both the separator and comment strings were set to the same, a semicolon.) Compiler-rt extensively uses separator chars in its assembly, and that assembly should be buildable with clang-cl for MSVC too. Differential Revision: https://reviews.llvm.org/D96259
148 lines
4.6 KiB
LLVM
148 lines
4.6 KiB
LLVM
; RUN: llc < %s -mtriple=aarch64-pc-windows-msvc | FileCheck %s
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; Control Flow Guard is currently only available on Windows
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; Test that Control Flow Guard checks are correctly added when required.
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declare i32 @target_func()
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; Test that Control Flow Guard checks are not added on calls with the "guard_nocf" attribute.
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define i32 @func_guard_nocf() {
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entry:
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%func_ptr = alloca i32 ()*, align 8
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store i32 ()* @target_func, i32 ()** %func_ptr, align 8
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%0 = load i32 ()*, i32 ()** %func_ptr, align 8
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%1 = call i32 %0() #0
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ret i32 %1
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; CHECK-LABEL: func_guard_nocf
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; CHECK: adrp x8, target_func
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; CHECK: add x8, x8, :lo12:target_func
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; CHECK-NOT: __guard_check_icall_fptr
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; CHECK: blr x8
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}
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attributes #0 = { "guard_nocf" }
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; Test that Control Flow Guard checks are added even at -O0.
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define i32 @func_optnone_cf() #1 {
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entry:
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%func_ptr = alloca i32 ()*, align 8
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store i32 ()* @target_func, i32 ()** %func_ptr, align 8
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%0 = load i32 ()*, i32 ()** %func_ptr, align 8
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%1 = call i32 %0()
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ret i32 %1
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; The call to __guard_check_icall_fptr should come immediately before the call to the target function.
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; CHECK-LABEL: func_optnone_cf
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; CHECK: adrp x8, target_func
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; CHECK: add x8, x8, :lo12:target_func
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; CHECK: adrp x9, __guard_check_icall_fptr
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; CHECK: add x9, x9, :lo12:__guard_check_icall_fptr
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; CHECK: ldr x9, [x9]
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; CHECK: mov x15, x8
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; CHECK: blr x9
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; CHECK-NEXT: blr x8
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}
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attributes #1 = { noinline optnone }
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; Test that Control Flow Guard checks are correctly added in optimized code (common case).
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define i32 @func_cf() {
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entry:
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%func_ptr = alloca i32 ()*, align 8
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store i32 ()* @target_func, i32 ()** %func_ptr, align 8
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%0 = load i32 ()*, i32 ()** %func_ptr, align 8
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%1 = call i32 %0()
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ret i32 %1
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; The call to __guard_check_icall_fptr should come immediately before the call to the target function.
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; CHECK-LABEL: func_cf
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; CHECK: adrp x8, __guard_check_icall_fptr
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; CHECK: ldr x9, [x8, :lo12:__guard_check_icall_fptr]
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; CHECK: adrp x8, target_func
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; CHECK: add x8, x8, :lo12:target_func
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; CHECK: mov x15, x8
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; CHECK: blr x9
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; CHECK-NEXT: blr x8
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}
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; Test that Control Flow Guard checks are correctly added on invoke instructions.
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define i32 @func_cf_invoke() personality i8* bitcast (void ()* @h to i8*) {
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entry:
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%0 = alloca i32, align 4
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%func_ptr = alloca i32 ()*, align 8
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store i32 ()* @target_func, i32 ()** %func_ptr, align 8
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%1 = load i32 ()*, i32 ()** %func_ptr, align 8
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%2 = invoke i32 %1()
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to label %invoke.cont unwind label %lpad
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invoke.cont: ; preds = %entry
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ret i32 %2
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lpad: ; preds = %entry
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%tmp = landingpad { i8*, i32 }
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catch i8* null
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ret i32 -1
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; The call to __guard_check_icall_fptr should come immediately before the call to the target function.
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; CHECK-LABEL: func_cf_invoke
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; CHECK: adrp x8, __guard_check_icall_fptr
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; CHECK: ldr x9, [x8, :lo12:__guard_check_icall_fptr]
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; CHECK: adrp x8, target_func
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; CHECK: add x8, x8, :lo12:target_func
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; CHECK: mov x15, x8
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; CHECK: blr x9
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; CHECK-NEXT: .Ltmp0:
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; CHECK-NEXT: blr x8
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; CHECK: // %invoke.cont
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; CHECK: // %lpad
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}
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declare void @h()
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; Test that longjmp targets have public labels and are included in the .gljmp section.
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%struct._SETJMP_FLOAT128 = type { [2 x i64] }
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@buf1 = internal global [16 x %struct._SETJMP_FLOAT128] zeroinitializer, align 16
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define i32 @func_cf_setjmp() {
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%1 = alloca i32, align 4
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%2 = alloca i32, align 4
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store i32 0, i32* %1, align 4
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store i32 -1, i32* %2, align 4
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%3 = call i8* @llvm.frameaddress(i32 0)
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%4 = call i32 @_setjmp(i8* bitcast ([16 x %struct._SETJMP_FLOAT128]* @buf1 to i8*), i8* %3) #2
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; CHECK-LABEL: func_cf_setjmp
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; CHECK: bl _setjmp
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; CHECK-NEXT: $cfgsj_func_cf_setjmp0:
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%5 = call i8* @llvm.frameaddress(i32 0)
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%6 = call i32 @_setjmp(i8* bitcast ([16 x %struct._SETJMP_FLOAT128]* @buf1 to i8*), i8* %5) #3
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; CHECK: bl _setjmp
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; CHECK-NEXT: $cfgsj_func_cf_setjmp1:
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store i32 1, i32* %2, align 4
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%7 = load i32, i32* %2, align 4
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ret i32 %7
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; CHECK: .section .gljmp$y,"dr"
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; CHECK-NEXT: .symidx $cfgsj_func_cf_setjmp0
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; CHECK-NEXT: .symidx $cfgsj_func_cf_setjmp1
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}
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declare i8* @llvm.frameaddress(i32)
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; Function Attrs: returns_twice
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declare dso_local i32 @_setjmp(i8*, i8*) #2
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attributes #2 = { returns_twice }
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attributes #3 = { returns_twice }
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!llvm.module.flags = !{!0}
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!0 = !{i32 2, !"cfguard", i32 2}
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