wineh-try-catch.ll
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; RUN: llc -o - %s -mtriple=aarch64-windows -verify-machineinstrs | FileCheck %s
; RUN: llc -o %t -filetype=obj %s -mtriple=aarch64-windows
; RUN: llvm-readobj --unwind %t | FileCheck %s -check-prefix=UNWIND
; We test the following
; 1) That the unwind help object is created and that its offset from the stack
; pointer on entry is patched into the table fed to __CxxFrameHandler3
; 2) That the stack update for the catch funclet only includes the callee saved
; registers
; 3) That the locals are accessed using the frame pointer in both the funclet
; and the parent function.
; The following checks that the unwind help object has -2 stored into it at
; fp + 16, which is on-entry sp - 16.
; We check this offset in the table later on.
; CHECK-LABEL: "?func@@YAHXZ":
; CHECK: stp x29, x30, [sp, #-64]!
; CHECK: str x28, [sp, #16]
; CHECK: str x21, [sp, #24]
; CHECK: stp x19, x20, [sp, #32]
; CHECK: mov x29, sp
; CHECK: sub sp, sp, #624
; CHECK: mov x19, sp
; CHECK: mov x0, #-2
; CHECK: stur x0, [x29, #48]
; Now check that x is stored at fp - 20. We check that this is the same
; location accessed from the funclet to retrieve x.
; CHECK: mov w8, #1
; CHECK: stur w8, [x29, [[X_OFFSET:#-[1-9][0-9]+]]
; Check the offset off the frame pointer at which B is located.
; Check the same offset is used to pass the address of B to init2 in the
; funclet.
; CHECK: sub x0, x29, [[B_OFFSET:#[1-9][0-9]+]]
; CHECK: bl "?init@@YAXPEAH@Z"
; This is the label for the throw that is encoded in the ip2state.
; We are inside the try block, where we make a call to func2
; CHECK-LABEL: .Ltmp0:
; CHECK: bl "?func2@@YAHXZ
; CHECK: [[CATCHRETDEST:.LBB0_[0-9]+]]: ; %catchret.dest
; Check the catch funclet.
; CHECK-LABEL: "?catch$2@?0??func@@YAHXZ@4HA":
; Check that the stack space is allocated only for the callee saved registers.
; CHECK: stp x29, x30, [sp, #-48]!
; CHECK: str x28, [sp, #16]
; CHECK: str x21, [sp, #24]
; CHECK: stp x19, x20, [sp, #32]
; CHECK: add x20, x19, #12
; Check that there are no further stack updates.
; CHECK-NOT: sub sp, sp
; Check that the stack address passed to init2 is off the frame pointer, and
; that it matches the address of B in the parent function.
; CHECK: sub x0, x29, [[B_OFFSET]]
; CHECK: bl "?init2@@YAXPEAH@Z"
; Check that are storing x back to the same location off the frame pointer as in
; the parent function.
; CHECK: stur w8, [x29, [[X_OFFSET]]]
; Check that the funclet branches back to the catchret destination
; CHECK: adrp x0, .LBB0_3
; CHECK-NEXT: add x0, x0, [[CATCHRETDEST]]
; Now check that the offset of the unwind help object from the stack pointer on
; entry to func is encoded in cppxdata that is passed to __CxxFrameHandler3. As
; computed above, this comes to -16.
; CHECK-LABEL: "$cppxdata$?func@@YAHXZ":
; CHECK-NEXT: .word 429065506 ; MagicNumber
; CHECK-NEXT: .word 2 ; MaxState
; CHECK-NEXT: .word ("$stateUnwindMap$?func@@YAHXZ")@IMGREL ; UnwindMap
; CHECK-NEXT: .word 1 ; NumTryBlocks
; CHECK-NEXT: .word ("$tryMap$?func@@YAHXZ")@IMGREL ; TryBlockMap
; CHECK-NEXT: .word 4 ; IPMapEntries
; CHECK-NEXT: .word ("$ip2state$?func@@YAHXZ")@IMGREL ; IPToStateXData
; CHECK-NEXT: .word -16 ; UnwindHelp
; UNWIND: Function: ?func@@YAHXZ (0x0)
; UNWIND: Prologue [
; UNWIND-NEXT: ; nop
; UNWIND-NEXT: ; sub sp, #624
; UNWIND-NEXT: ; mov fp, sp
; UNWIND-NEXT: ; stp x19, x20, [sp, #32]
; UNWIND-NEXT: ; str x21, [sp, #24]
; UNWIND-NEXT: ; str x28, [sp, #16]
; UNWIND-NEXT: ; stp x29, x30, [sp, #-64]!
; UNWIND-NEXT: ; end
; UNWIND: Function: ?catch$2@?0??func@@YAHXZ@4HA
; UNWIND: Prologue [
; UNWIND-NEXT: ; stp x19, x20, [sp, #32]
; UNWIND-NEXT: ; str x21, [sp, #24]
; UNWIND-NEXT: ; str x28, [sp, #16]
; UNWIND-NEXT: ; stp x29, x30, [sp, #-48]!
; UNWIND-NEXT: ; end
target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-unknown-windows-msvc19.11.0"
%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
%eh.CatchableType = type { i32, i32, i32, i32, i32, i32, i32 }
%eh.CatchableTypeArray.1 = type { i32, [1 x i32] }
%eh.ThrowInfo = type { i32, i32, i32, i32 }
$"??_R0H@8" = comdat any
$"_CT??_R0H@84" = comdat any
$_CTA1H = comdat any
$_TI1H = comdat any
@"??_7type_info@@6B@" = external constant i8*
@"??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
@__ImageBase = external dso_local constant i8
@"_CT??_R0H@84" = linkonce_odr unnamed_addr constant %eh.CatchableType { i32 1, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%rtti.TypeDescriptor2* @"??_R0H@8" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32), i32 0, i32 -1, i32 0, i32 4, i32 0 }, section ".xdata", comdat
@_CTA1H = linkonce_odr unnamed_addr constant %eh.CatchableTypeArray.1 { i32 1, [1 x i32] [i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%eh.CatchableType* @"_CT??_R0H@84" to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32)] }, section ".xdata", comdat
@_TI1H = linkonce_odr unnamed_addr constant %eh.ThrowInfo { i32 0, i32 0, i32 0, i32 trunc (i64 sub nuw nsw (i64 ptrtoint (%eh.CatchableTypeArray.1* @_CTA1H to i64), i64 ptrtoint (i8* @__ImageBase to i64)) to i32) }, section ".xdata", comdat
; Function Attrs: noinline optnone
define dso_local i32 @"?func@@YAHXZ"() #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
entry:
%B = alloca [50 x i32], align 4
%x = alloca i32, align 4
%tmp = alloca i32, align 4
%i = alloca i32, align 4
%C = alloca [100 x i32], align 4
store i32 1, i32* %x, align 4
%arraydecay = getelementptr inbounds [50 x i32], [50 x i32]* %B, i32 0, i32 0
call void @"?init@@YAXPEAH@Z"(i32* %arraydecay)
%call = invoke i32 @"?func2@@YAHXZ"()
to label %invoke.cont unwind label %catch.dispatch
invoke.cont: ; preds = %entry
store i32 %call, i32* %tmp, align 4
%0 = bitcast i32* %tmp to i8*
invoke void @_CxxThrowException(i8* %0, %eh.ThrowInfo* @_TI1H) #2
to label %unreachable unwind label %catch.dispatch
catch.dispatch: ; preds = %invoke.cont, %entry
%1 = catchswitch within none [label %catch] unwind to caller
catch: ; preds = %catch.dispatch
%2 = catchpad within %1 [%rtti.TypeDescriptor2* @"??_R0H@8", i32 0, i32* %i]
%arraydecay1 = getelementptr inbounds [100 x i32], [100 x i32]* %C, i32 0, i32 0
call void @"?init@@YAXPEAH@Z"(i32* %arraydecay1) [ "funclet"(token %2) ]
%arraydecay2 = getelementptr inbounds [50 x i32], [50 x i32]* %B, i32 0, i32 0
call void @"?init2@@YAXPEAH@Z"(i32* %arraydecay2) [ "funclet"(token %2) ]
%3 = load i32, i32* %i, align 4
%idxprom = sext i32 %3 to i64
%arrayidx = getelementptr inbounds [50 x i32], [50 x i32]* %B, i64 0, i64 %idxprom
%4 = load i32, i32* %arrayidx, align 4
%5 = load i32, i32* %i, align 4
%idxprom3 = sext i32 %5 to i64
%arrayidx4 = getelementptr inbounds [100 x i32], [100 x i32]* %C, i64 0, i64 %idxprom3
%6 = load i32, i32* %arrayidx4, align 4
%add = add nsw i32 %4, %6
%7 = load i32, i32* %i, align 4
%8 = load i32, i32* %i, align 4
%mul = mul nsw i32 %7, %8
%add5 = add nsw i32 %add, %mul
store i32 %add5, i32* %x, align 4
catchret from %2 to label %catchret.dest
catchret.dest: ; preds = %catch
br label %try.cont
try.cont: ; preds = %catchret.dest
%arrayidx6 = getelementptr inbounds [50 x i32], [50 x i32]* %B, i64 0, i64 2
%9 = load i32, i32* %arrayidx6, align 4
%10 = load i32, i32* %x, align 4
%add7 = add nsw i32 %9, %10
ret i32 %add7
unreachable: ; preds = %invoke.cont
unreachable
}
declare dso_local void @"?init@@YAXPEAH@Z"(i32*)
declare dso_local i32 @"?func2@@YAHXZ"()
declare dso_local i32 @__CxxFrameHandler3(...)
declare dllimport void @_CxxThrowException(i8*, %eh.ThrowInfo*)
declare dso_local void @"?init2@@YAXPEAH@Z"(i32*)
attributes #0 = { noinline optnone }
attributes #2 = { noreturn }