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[SEH] Add missing test case from previous realignment commit

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241700 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner 2015-07-08 18:09:39 +00:00
parent f0999f3b02
commit 92ea0775b7
1 changed files with 101 additions and 0 deletions
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101
test/CodeGen/X86/seh-stack-realign.ll Normal file
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; RUN: llc -mtriple=i686-windows-msvc < %s | FileCheck %s
; 32-bit catch-all has to use a filter function because that's how it saves the
; exception code.
@str = linkonce_odr unnamed_addr constant [27 x i8] c"GetExceptionCode(): 0x%lx\0A\00", align 1
declare i32 @_except_handler3(...)
declare void @crash()
declare i32 @printf(i8* nocapture readonly, ...) nounwind
declare i32 @llvm.eh.typeid.for(i8*)
declare i8* @llvm.frameaddress(i32)
declare i8* @llvm.localrecover(i8*, i8*, i32)
declare void @llvm.localescape(...)
declare i8* @llvm.x86.seh.recoverfp(i8*, i8*)
define i32 @main() personality i8* bitcast (i32 (...)* @_except_handler3 to i8*) {
entry:
; The EH code allocation is overaligned, triggering realignment.
%__exceptioncode = alloca i32, align 8
call void (...) @llvm.localescape(i32* %__exceptioncode)
invoke void @crash() #5
to label %__try.cont unwind label %lpad
lpad: ; preds = %entry
%0 = landingpad { i8*, i32 }
catch i8* bitcast (i32 ()* @"filt$main" to i8*)
%1 = extractvalue { i8*, i32 } %0, 1
%2 = call i32 @llvm.eh.typeid.for(i8* bitcast (i32 ()* @"filt$main" to i8*)) #4
%matches = icmp eq i32 %1, %2
br i1 %matches, label %__except, label %eh.resume
__except: ; preds = %lpad
%3 = load i32, i32* %__exceptioncode, align 4
%call = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @str, i32 0, i32 0), i32 %3) #4
br label %__try.cont
__try.cont: ; preds = %entry, %__except
ret i32 0
eh.resume: ; preds = %lpad
resume { i8*, i32 } %0
}
define internal i32 @"filt$main"() {
entry:
%ebp = tail call i8* @llvm.frameaddress(i32 1)
%parentfp = tail call i8* @llvm.x86.seh.recoverfp(i8* bitcast (i32 ()* @main to i8*), i8* %ebp)
%code.i8 = tail call i8* @llvm.localrecover(i8* bitcast (i32 ()* @main to i8*), i8* %parentfp, i32 0)
%__exceptioncode = bitcast i8* %code.i8 to i32*
%info.addr = getelementptr inbounds i8, i8* %ebp, i32 -20
%0 = bitcast i8* %info.addr to i32***
%1 = load i32**, i32*** %0, align 4
%2 = load i32*, i32** %1, align 4
%3 = load i32, i32* %2, align 4
store i32 %3, i32* %__exceptioncode, align 4
ret i32 1
}
; Check that we can get the exception code from eax to the printf.
; CHECK-LABEL: _main:
; CHECK: Lmain$frame_escape_0 = [[code_offs:[-0-9]+]]
; CHECK: Lmain$frame_escape_1 = [[reg_offs:[-0-9]+]]
; CHECK: movl %esp, [[reg_offs]](%esi)
; CHECK: movl $L__ehtable$main,
; EH state 0
; CHECK: movl $0, 40(%esi)
; CHECK: calll _crash
; CHECK: retl
; CHECK: # Block address taken
; Restore ESP
; CHECK: movl -24(%ebp), %esp
; Restore ESI
; CHECK: movl $Lmain$parent_frame_offset, %eax
; CHECK: negl %eax
; CHECK: leal -24(%ebp,%eax), %esi
; Restore EBP
; CHECK: movl 12(%esi), %ebp # 4-byte Reload
; EH state -1
; CHECK: movl [[code_offs]](%esi), %[[code:[a-z]+]]
; CHECK: movl $-1, 40(%esi)
; CHECK-DAG: movl %[[code]], 4(%esp)
; CHECK-DAG: movl $_str, (%esp)
; CHECK: calll _printf
; CHECK: .section .xdata,"dr"
; CHECK: Lmain$parent_frame_offset = Lmain$frame_escape_1
; CHECK: L__ehtable$main
; CHECK-NEXT: .long -1
; CHECK-NEXT: .long _filt$main
; CHECK-NEXT: .long Ltmp{{[0-9]+}}
; CHECK-LABEL: _filt$main:
; CHECK: pushl %ebp
; CHECK: movl %esp, %ebp
; CHECK: movl (%ebp), %[[oldebp:[a-z]+]]
; CHECK: movl -20(%[[oldebp]]), %[[ehinfo:[a-z]+]]
; CHECK: movl (%[[ehinfo]]), %[[ehrec:[a-z]+]]
; CHECK: movl (%[[ehrec]]), %[[ehcode:[a-z]+]]
; CHECK: movl %[[ehcode]], {{.*}}(%{{.*}})