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ccf132c096
Our current emission strategy is to emit the funclet prologue in the CatchPad's normal destination. This is problematic because intra-funclet control flow to the normal destination is not erroneous and results in us reevaluating the prologue if said control flow is taken. Instead, use the CatchPad's location for the funclet prologue. This correctly models our desire to have unwind edges evaluate the prologue but edges to the normal destination result in typical control flow. Differential Revision: http://reviews.llvm.org/D13424 llvm-svn: 249483
99 lines
2.5 KiB
LLVM
99 lines
2.5 KiB
LLVM
; RUN: llc -mtriple=x86_64-windows-msvc < %s | FileCheck %s
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc"
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define void @"\01?f@@YAXXZ"(i1 %B) personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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invoke void @g()
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to label %unreachable unwind label %cleanupblock
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cleanupblock:
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%cleanp = cleanuppad []
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call void @g()
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cleanupret %cleanp unwind label %catch.dispatch
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catch.dispatch:
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%cp = catchpad [i8* null, i32 64, i8* null]
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to label %catch unwind label %catchendblock
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catch:
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call void @g()
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catchret %cp to label %try.cont
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try.cont:
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ret void
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catchendblock:
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catchendpad unwind to caller
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unreachable:
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unreachable
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}
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declare void @g()
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declare i32 @__CxxFrameHandler3(...)
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; Destructors need CFI but they shouldn't use the .seh_handler directive.
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; CHECK: "?dtor$[[cleanup:[0-9]+]]@?0??f@@YAXXZ@4HA":
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; CHECK: .seh_proc "?dtor$[[cleanup]]@?0??f@@YAXXZ@4HA"
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; CHECK-NOT: .seh_handler __CxxFrameHandler3
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; CHECK: LBB0_[[cleanup]]: # %cleanupblock{{$}}
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; Emit CFI for pushing RBP.
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; CHECK: movq %rdx, 16(%rsp)
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; CHECK: pushq %rbp
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; CHECK: .seh_pushreg 5
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; Emit CFI for allocating from the stack pointer.
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; CHECK: subq $32, %rsp
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; CHECK: .seh_stackalloc 32
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; CHECK: leaq 48(%rdx), %rbp
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; CHECK-NOT: .seh_setframe
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; Prologue is done, emit the .seh_endprologue directive.
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; CHECK: .seh_endprologue
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; Make sure there is a nop after a call if the call precedes the epilogue.
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; CHECK: callq g
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; CHECK-NEXT: nop
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; Don't emit a reference to the LSDA.
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; CHECK: .seh_handlerdata
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; CHECK-NOT: .long ("$cppxdata$?f@@YAXXZ")@IMGREL
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; CHECK-NEXT: .text
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; CHECK: .seh_endproc
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; CHECK: "?catch$[[catch:[0-9]+]]@?0??f@@YAXXZ@4HA":
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; CHECK: .seh_proc "?catch$[[catch]]@?0??f@@YAXXZ@4HA"
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; CHECK-NEXT: .seh_handler __CxxFrameHandler3, @unwind, @except
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; CHECK: LBB0_[[catch]]: # %catch.dispatch{{$}}
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; Emit CFI for pushing RBP.
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; CHECK: movq %rdx, 16(%rsp)
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; CHECK: pushq %rbp
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; CHECK: .seh_pushreg 5
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; Emit CFI for allocating from the stack pointer.
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; CHECK: subq $32, %rsp
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; CHECK: .seh_stackalloc 32
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; CHECK: leaq 48(%rdx), %rbp
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; CHECK-NOT: .seh_setframe
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; Prologue is done, emit the .seh_endprologue directive.
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; CHECK: .seh_endprologue
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; Make sure there is at least one instruction after a call before the epilogue.
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; CHECK: callq g
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; CHECK-NEXT: leaq .LBB0_{{[0-9]+}}(%rip), %rax
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; Emit a reference to the LSDA.
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; CHECK: .seh_handlerdata
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; CHECK-NEXT: .long ("$cppxdata$?f@@YAXXZ")@IMGREL
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; CHECK-NEXT: .text
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; CHECK: .seh_endproc
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