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llvm-mirror/test/CodeGen/X86/win-catchpad.ll
David Majnemer a9ac81b53d [X86] Don't give catch objects a displacement of zero 
Catch objects with a displacement of zero do not initialize a catch
object.  The displacement is relative to %rsp at the end of the
function's prologue for x86_64 targets.

If we place an object at the top-of-stack, we will end up wit a
displacement of zero resulting in our catch object remaining
uninitialized.

Address this by creating our catch objects as fixed objects.  We will
ensure that the UnwindHelp object is created after the catch objects so
that no catch object will have a displacement of zero.

Differential Revision: http://reviews.llvm.org/D17823

llvm-svn: 262546
2016-03-03 00:01:25 +00:00

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; RUN: llc -stack-symbol-ordering=0 -verify-machineinstrs -mtriple=i686-pc-windows-msvc < %s | FileCheck --check-prefix=X86 %s
; RUN: llc -stack-symbol-ordering=0 -verify-machineinstrs -mtriple=x86_64-pc-windows-msvc < %s | FileCheck --check-prefix=X64 %s
; Loosely based on IR for this C++ source code:
; void f(int p);
; int main() {
; try {
; f(1);
; } catch (int e) {
; f(e);
; } catch (...) {
; f(3);
; }
; }
%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
%eh.CatchableType = type { i32, i8*, i32, i32, i32, i32, i8* }
%eh.CatchableTypeArray.1 = type { i32, [1 x %eh.CatchableType*] }
%eh.ThrowInfo = type { i32, i8*, i8*, i8* }
$"\01??_R0H@8" = comdat any
@"\01??_7type_info@@6B@" = external constant i8*
@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
declare void @f(i32 %p, i32* %l)
declare i1 @getbool()
declare i32 @__CxxFrameHandler3(...)
define i32 @try_catch_catch() personality i32 (...)* @__CxxFrameHandler3 {
entry:
%e.addr = alloca i32
%local = alloca i32
invoke void @f(i32 1, i32* %local)
to label %try.cont unwind label %catch.dispatch
catch.dispatch: ; preds = %entry
%cs = catchswitch within none [label %handler1, label %handler2] unwind to caller
handler1:
%h1 = catchpad within %cs [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i32* %e.addr]
%e = load i32, i32* %e.addr
call void @f(i32 %e, i32* %local) [ "funclet"(token %h1) ]
catchret from %h1 to label %try.cont
handler2:
%h2 = catchpad within %cs [i8* null, i32 64, i8* null]
call void @f(i32 3, i32* %local) [ "funclet"(token %h2) ]
catchret from %h2 to label %try.cont
try.cont:
ret i32 0
}
; X86-LABEL: _try_catch_catch:
; X86: movl %esp, -[[sp_offset:[0-9]+]](%ebp)
; X86: movl $0, -{{[0-9]+}}(%ebp)
; X86: leal -[[local_offs:[0-9]+]](%ebp), %[[addr_reg:[a-z]+]]
; X86-DAG: movl %[[addr_reg]], 4(%esp)
; X86-DAG: movl $1, (%esp)
; X86: calll _f
; X86: [[contbb:LBB0_[0-9]+]]: # %try.cont
; X86: retl
; X86: [[restorebb1:LBB0_[0-9]+]]: # Block address taken
; X86-NEXT: # %handler1
; X86-NEXT: addl $12, %ebp
; X86: jmp [[contbb]]
; FIXME: These should be de-duplicated.
; X86: [[restorebb2:LBB0_[0-9]+]]: # Block address taken
; X86-NEXT: # %handler2
; X86-NEXT: addl $12, %ebp
; X86: jmp [[contbb]]
; X86: "?catch$[[catch1bb:[0-9]+]]@?0?try_catch_catch@4HA":
; X86: LBB0_[[catch1bb]]: # %handler1{{$}}
; X86: pushl %ebp
; X86: subl $8, %esp
; X86: addl $12, %ebp
; X86: movl %esp, -[[sp_offset]](%ebp)
; X86-DAG: movl -32(%ebp), %[[e_reg:[a-z]+]]
; X86-DAG: leal -[[local_offs]](%ebp), %[[addr_reg:[a-z]+]]
; X86-DAG: movl $1, -{{[0-9]+}}(%ebp)
; X86-DAG: movl %[[addr_reg]], 4(%esp)
; X86-DAG: movl %[[e_reg]], (%esp)
; X86: calll _f
; X86-NEXT: movl $[[restorebb1]], %eax
; X86-NEXT: addl $8, %esp
; X86-NEXT: popl %ebp
; X86-NEXT: retl
; X86: "?catch$[[catch2bb:[0-9]+]]@?0?try_catch_catch@4HA":
; X86: LBB0_[[catch2bb]]: # %handler2{{$}}
; X86: pushl %ebp
; X86: subl $8, %esp
; X86: addl $12, %ebp
; X86: movl %esp, -[[sp_offset]](%ebp)
; X86-DAG: leal -[[local_offs]](%ebp), %[[addr_reg:[a-z]+]]
; X86-DAG: movl $1, -{{[0-9]+}}(%ebp)
; X86-DAG: movl %[[addr_reg]], 4(%esp)
; X86-DAG: movl $3, (%esp)
; X86: calll _f
; X86-NEXT: movl $[[restorebb2]], %eax
; X86-NEXT: addl $8, %esp
; X86-NEXT: popl %ebp
; X86-NEXT: retl
; X86: L__ehtable$try_catch_catch:
; X86: $handlerMap$0$try_catch_catch:
; X86-NEXT: .long 0
; X86-NEXT: .long "??_R0H@8"
; X86-NEXT: .long -20
; X86-NEXT: .long "?catch$[[catch1bb]]@?0?try_catch_catch@4HA"
; X86-NEXT: .long 64
; X86-NEXT: .long 0
; X86-NEXT: .long 0
; X86-NEXT: .long "?catch$[[catch2bb]]@?0?try_catch_catch@4HA"
; X64-LABEL: try_catch_catch:
; X64: Lfunc_begin0:
; X64: pushq %rbp
; X64: .seh_pushreg 5
; X64: subq $[[STCK_ALLOC:.*]], %rsp
; X64: .seh_stackalloc [[STCK_ALLOC]]
; X64: leaq [[STCK_ALLOC]](%rsp), %rbp
; X64: .seh_setframe 5, [[STCK_ALLOC]]
; X64: .seh_endprologue
; X64: movq $-2, -16(%rbp)
; X64: .Ltmp0
; X64-DAG: leaq -[[local_offs:[0-9]+]](%rbp), %rdx
; X64-DAG: movl $1, %ecx
; X64: callq f
; X64: [[contbb:\.LBB0_[0-9]+]]: # Block address taken
; X64-NEXT: # %try.cont
; X64: addq $[[STCK_ALLOC]], %rsp
; X64: popq %rbp
; X64: retq
; X64: "?catch$[[catch1bb:[0-9]+]]@?0?try_catch_catch@4HA":
; X64: LBB0_[[catch1bb]]: # %handler1{{$}}
; X64: movq %rdx, 16(%rsp)
; X64: pushq %rbp
; X64: .seh_pushreg 5
; X64: subq $32, %rsp
; X64: .seh_stackalloc 32
; X64: leaq [[STCK_ALLOC]](%rdx), %rbp
; X64: .seh_endprologue
; X64-DAG: leaq -[[local_offs]](%rbp), %rdx
; X64-DAG: movl -4(%rbp), %ecx
; X64: callq f
; X64: leaq [[contbb]](%rip), %rax
; X64-NEXT: addq $32, %rsp
; X64-NEXT: popq %rbp
; X64-NEXT: retq
; X64: "?catch$[[catch2bb:[0-9]+]]@?0?try_catch_catch@4HA":
; X64: LBB0_[[catch2bb]]: # %handler2{{$}}
; X64: movq %rdx, 16(%rsp)
; X64: pushq %rbp
; X64: .seh_pushreg 5
; X64: subq $32, %rsp
; X64: .seh_stackalloc 32
; X64: leaq [[STCK_ALLOC]](%rdx), %rbp
; X64: .seh_endprologue
; X64-DAG: leaq -[[local_offs]](%rbp), %rdx
; X64-DAG: movl $3, %ecx
; X64: callq f
; X64: leaq [[contbb]](%rip), %rax
; X64-NEXT: addq $32, %rsp
; X64-NEXT: popq %rbp
; X64-NEXT: retq
; X64: $cppxdata$try_catch_catch:
; X64-NEXT: .long 429065506
; X64-NEXT: .long 2
; X64-NEXT: .long ($stateUnwindMap$try_catch_catch)@IMGREL
; X64-NEXT: .long 1
; X64-NEXT: .long ($tryMap$try_catch_catch)@IMGREL
; X64-NEXT: .long 5
; X64-NEXT: .long ($ip2state$try_catch_catch)@IMGREL
; X64-NEXT: .long 48
; X64-NEXT: .long 0
; X64-NEXT: .long 1
; X64: $tryMap$try_catch_catch:
; X64-NEXT: .long 0
; X64-NEXT: .long 0
; X64-NEXT: .long 1
; X64-NEXT: .long 2
; X64-NEXT: .long ($handlerMap$0$try_catch_catch)@IMGREL
; X64: $handlerMap$0$try_catch_catch:
; X64-NEXT: .long 0
; X64-NEXT: .long "??_R0H@8"@IMGREL
; X64-NEXT: .long 60
; X64-NEXT: .long "?catch$[[catch1bb]]@?0?try_catch_catch@4HA"@IMGREL
; X64-NEXT: .long 56
; X64-NEXT: .long 64
; X64-NEXT: .long 0
; X64-NEXT: .long 0
; X64-NEXT: .long "?catch$[[catch2bb]]@?0?try_catch_catch@4HA"@IMGREL
; X64-NEXT: .long 56
; X64: $ip2state$try_catch_catch:
; X64-NEXT: .long .Lfunc_begin0@IMGREL
; X64-NEXT: .long -1
; X64-NEXT: .long .Ltmp0@IMGREL+1
; X64-NEXT: .long 0
; X64-NEXT: .long .Ltmp1@IMGREL+1
; X64-NEXT: .long -1
; X64-NEXT: .long "?catch$[[catch1bb]]@?0?try_catch_catch@4HA"@IMGREL
; X64-NEXT: .long 1
; X64-NEXT: .long "?catch$[[catch2bb]]@?0?try_catch_catch@4HA"@IMGREL
; X64-NEXT: .long 1
define i32 @branch_to_normal_dest() personality i32 (...)* @__CxxFrameHandler3 {
entry:
invoke void @f(i32 1, i32* null)
to label %try.cont unwind label %catch.dispatch
catch.dispatch:
%cs1 = catchswitch within none [label %catch] unwind to caller
catch:
%cp1 = catchpad within %cs1 [i8* null, i32 64, i8* null]
br label %loop
loop:
%V = call i1 @getbool() [ "funclet"(token %cp1) ]
br i1 %V, label %loop, label %catch.done
catch.done:
catchret from %cp1 to label %try.cont
try.cont:
ret i32 0
}
; X86-LABEL: _branch_to_normal_dest:
; X86: calll _f
; X86: [[contbb:LBB1_[0-9]+]]: # %try.cont
; X86: retl
; X86: [[restorebb:LBB1_[0-9]+]]: # Block address taken
; X86-NEXT: # %catch.done
; X86-NEXT: addl $12, %ebp
; X86: jmp [[contbb]]
; X86: "?catch$[[catchbb:[0-9]+]]@?0?branch_to_normal_dest@4HA":
; X86: LBB1_[[catchbb]]: # %catch{{$}}
; X86: pushl %ebp
; X86: subl $8, %esp
; X86: addl $12, %ebp
; X86: movl $1, -16(%ebp)
; X86: LBB1_[[loopbb:[0-9]+]]: # %loop
; X86: calll _getbool
; X86: testb $1, %al
; X86: jne LBB1_[[loopbb]]
; X86: # %catch.done
; X86-NEXT: movl $[[restorebb]], %eax
; X86-NEXT: addl $8, %esp
; X86-NEXT: popl %ebp
; X86-NEXT: retl
; X86: L__ehtable$branch_to_normal_dest:
; X86: $handlerMap$0$branch_to_normal_dest:
; X86-NEXT: .long 64
; X86-NEXT: .long 0
; X86-NEXT: .long 0
; X86-NEXT: .long "?catch$[[catchbb]]@?0?branch_to_normal_dest@4HA"
; X64-LABEL: branch_to_normal_dest:
; X64: # %entry
; X64: pushq %rbp
; X64: .seh_pushreg 5
; X64: subq $48, %rsp
; X64: .seh_stackalloc 48
; X64: leaq 48(%rsp), %rbp
; X64: .seh_setframe 5, 48
; X64: .seh_endprologue
; X64: .Ltmp[[before_call:[0-9]+]]:
; X64: callq f
; X64: .Ltmp[[after_call:[0-9]+]]:
; X64: [[contbb:\.LBB1_[0-9]+]]: # Block address taken
; X64-NEXT: # %try.cont
; X64: addq $48, %rsp
; X64: popq %rbp
; X64: retq
; X64: "?catch$[[catchbb:[0-9]+]]@?0?branch_to_normal_dest@4HA":
; X64: LBB1_[[catchbb]]: # %catch{{$}}
; X64: movq %rdx, 16(%rsp)
; X64: pushq %rbp
; X64: .seh_pushreg 5
; X64: subq $32, %rsp
; X64: .seh_stackalloc 32
; X64: leaq 48(%rdx), %rbp
; X64: .seh_endprologue
; X64: .LBB1_[[normal_dest_bb:[0-9]+]]: # %loop
; X64: callq getbool
; X64: testb $1, %al
; X64: jne .LBB1_[[normal_dest_bb]]
; X64: # %catch.done
; X64: leaq [[contbb]](%rip), %rax
; X64-NEXT: addq $32, %rsp
; X64-NEXT: popq %rbp
; X64-NEXT: retq
; X64-LABEL: $cppxdata$branch_to_normal_dest:
; X64-NEXT: .long 429065506
; X64-NEXT: .long 2
; X64-NEXT: .long ($stateUnwindMap$branch_to_normal_dest)@IMGREL
; X64-NEXT: .long 1
; X64-NEXT: .long ($tryMap$branch_to_normal_dest)@IMGREL
; X64-NEXT: .long 4
; X64-NEXT: .long ($ip2state$branch_to_normal_dest)@IMGREL
; X64-NEXT: .long 40
; X64-NEXT: .long 0
; X64-NEXT: .long 1
; X64-LABEL: $stateUnwindMap$branch_to_normal_dest:
; X64-NEXT: .long -1
; X64-NEXT: .long 0
; X64-NEXT: .long -1
; X64-NEXT: .long 0
; X64-LABEL: $tryMap$branch_to_normal_dest:
; X64-NEXT: .long 0
; X64-NEXT: .long 0
; X64-NEXT: .long 1
; X64-NEXT: .long 1
; X64-NEXT: .long ($handlerMap$0$branch_to_normal_dest)@IMGREL
; X64-LABEL: $handlerMap$0$branch_to_normal_dest:
; X64-NEXT: .long 64
; X64-NEXT: .long 0
; X64-NEXT: .long 0
; X64-NEXT: .long "?catch$[[catchbb]]@?0?branch_to_normal_dest@4HA"@IMGREL
; X64-NEXT: .long 56
; X64-LABEL: $ip2state$branch_to_normal_dest:
; X64-NEXT: .long .Lfunc_begin1@IMGREL
; X64-NEXT: .long -1
; X64-NEXT: .long .Ltmp[[before_call]]@IMGREL+1
; X64-NEXT: .long 0
; X64-NEXT: .long .Ltmp[[after_call]]@IMGREL+1
; X64-NEXT: .long -1
; X64-NEXT: .long "?catch$[[catchbb]]@?0?branch_to_normal_dest@4HA"@IMGREL
; X64-NEXT: .long 1
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