derek.holloway
7502bf64a4
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82 lines
1.7 KiB
LLVM
82 lines
1.7 KiB
LLVM
; RUN: llc -mtriple x86_64-pc-windows-msvc < %s | FileCheck %s
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declare void @maybe_throw()
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@_ZTIi = external constant ptr
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@g = external global i32
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declare i32 @__C_specific_handler(...)
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declare i32 @__gxx_personality_seh0(...)
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declare i32 @llvm.eh.typeid.for(ptr) readnone nounwind
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define i32 @use_seh() personality ptr @__C_specific_handler {
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entry:
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invoke void @maybe_throw()
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to label %cont unwind label %lpad
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cont:
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ret i32 0
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lpad:
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%cs = catchswitch within none [label %catch] unwind to caller
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catch:
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%p = catchpad within %cs [ptr @filt_g]
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catchret from %p to label %ret1
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ret1:
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ret i32 1
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}
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define internal i32 @filt_g(ptr, ptr) {
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%g = load i32, ptr @g
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ret i32 %g
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}
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; CHECK-LABEL: use_seh:
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; CHECK: callq maybe_throw
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; CHECK: xorl %eax, %eax
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; CHECK: .LBB0_[[epilogue:[0-9]+]]
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; CHECK: retq
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; CHECK: # %catch{{$}}
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; CHECK: movl $1, %eax
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; CHECK: jmp .LBB0_[[epilogue]]
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; A MinGW64-ish EH style. It could happen if a binary uses both MSVC CRT and
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; mingw CRT and is linked with LTO.
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define i32 @use_gcc() personality ptr @__gxx_personality_seh0 {
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entry:
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invoke void @maybe_throw()
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to label %cont unwind label %lpad
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cont:
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ret i32 0
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lpad:
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%ehvals = landingpad { ptr, i32 }
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cleanup
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catch ptr @_ZTIi
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%ehsel = extractvalue { ptr, i32 } %ehvals, 1
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%filt_g_sel = call i32 @llvm.eh.typeid.for(ptr @filt_g)
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%matches = icmp eq i32 %ehsel, %filt_g_sel
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br i1 %matches, label %ret1, label %eh.resume
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ret1:
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ret i32 1
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eh.resume:
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resume { ptr, i32 } %ehvals
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}
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; CHECK-LABEL: use_gcc:
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; CHECK: callq maybe_throw
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; CHECK: xorl %eax, %eax
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;
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; CHECK: # %lpad
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; CHECK: cmpl $2, %edx
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; CHECK: jne
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;
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; CHECK: # %ret1
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; CHECK: movl $1, %eax
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;
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; CHECK: callq _Unwind_Resume
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