derek.holloway
7502bf64a4
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63 lines
1.6 KiB
LLVM
63 lines
1.6 KiB
LLVM
; RUN: llc < %s -mtriple=i686-pc-windows-msvc | FileCheck %s -check-prefix=X86
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; RUN: llc < %s -mtriple=x86_64-pc-windows-msvc | FileCheck %s -check-prefixes=X64
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; Control Flow Guard is currently only available on Windows
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; funclets only supported in MSVC env.
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; Test that Control Flow Guard Checks are added well for targets in try-catch.
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declare i32 @target_func()
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%eh.ThrowInfo = type { i32, ptr, ptr, ptr }
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declare i32 @__CxxFrameHandler3(...)
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declare void @_CxxThrowException(ptr, ptr)
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define i32 @func_cf_exception() personality ptr @__CxxFrameHandler3 {
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entry:
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%func_ptr = alloca ptr, align 8
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store ptr @target_func, ptr %func_ptr, align 8
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invoke void @_CxxThrowException(ptr null, ptr null) #11
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to label %unreachable unwind label %ehcleanup
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ehcleanup:
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%0 = cleanuppad within none []
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%isnull = icmp eq ptr %func_ptr, null
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br i1 %isnull, label %exit, label %callfn
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callfn:
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%1 = load ptr, ptr %func_ptr, align 8
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%2 = call i32 %1() #9 [ "funclet"(token %0) ]
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br label %exit
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exit:
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cleanupret from %0 unwind label %catch.dispatch
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unreachable:
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unreachable
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catch.dispatch:
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%3 = catchswitch within none [label %catch] unwind to caller
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catch:
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%4 = catchpad within %3 [ptr null, i32 64, ptr null]
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catchret from %4 to label %try.cont
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try.cont:
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ret i32 0
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; X86-LABEL: func_cf_exception
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; X86: calll *___guard_check_icall_fptr
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; X86-NEXT: calll *%ecx
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; X64-LABEL: func_cf_exception
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; X64: callq *__guard_dispatch_icall_fptr(%rip)
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; X64-NOT: callq
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}
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!llvm.module.flags = !{!0}
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!0 = !{i32 2, !"cfguard", i32 2}
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