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llvm-mirror/test/CodeGen/X86/seh-catchpad.ll
Reid Kleckner 53a410195b Don't emit .seh_handler directives for any cleanup funclets 
We were falsely claiming that we had an LSDA for the relevant EH
personality before this change, which could lead to the EH machinery
interpreting random adjacent data as an LSDA.

Fixes PR31317

This change is safe because cleanups can't contain exception handlers
today. We do these things to maintain that invariant:
- C++ destructors are naturally out-of-line
- __finally blocks are outlined in clang
- LLVM's inliner will not inline EH constructs into cleanups

llvm-svn: 289101
2016-12-08 20:38:46 +00:00

196 lines
7.8 KiB
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; RUN: llc < %s | FileCheck %s
; Based on the source:
; extern "C" int puts(const char *);
; extern "C" int printf(const char *, ...);
; extern "C" int do_div(int a, int b) { return a / b; }
; extern "C" int filt();
; int main() {
; __try {
; __try {
; do_div(1, 0);
; } __except (1) {
; __try {
; do_div(1, 0);
; } __finally {
; puts("finally");
; }
; }
; } __except (filt()) {
; puts("caught");
; }
; return 0;
; }
; ModuleID = 't.cpp'
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc"
$"\01??_C@_07MKBLAIAL@finally?$AA@" = comdat any
$"\01??_C@_06IBDBCMGJ@caught?$AA@" = comdat any
@"\01??_C@_07MKBLAIAL@finally?$AA@" = linkonce_odr unnamed_addr constant [8 x i8] c"finally\00", comdat, align 1
@"\01??_C@_06IBDBCMGJ@caught?$AA@" = linkonce_odr unnamed_addr constant [7 x i8] c"caught\00", comdat, align 1
; Function Attrs: nounwind readnone
define i32 @do_div(i32 %a, i32 %b) #0 {
entry:
%div = sdiv i32 %a, %b
ret i32 %div
}
define i32 @main() #1 personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
entry:
%call = invoke i32 @do_div(i32 1, i32 0) #4
to label %__try.cont.12 unwind label %catch.dispatch
__except.2: ; preds = %__except
%call4 = invoke i32 @do_div(i32 1, i32 0) #4
to label %invoke.cont.3 unwind label %ehcleanup
invoke.cont.3: ; preds = %__except.2
invoke fastcc void @"\01?fin$0@0@main@@"() #4
to label %__try.cont.12 unwind label %catch.dispatch.7
__except.9: ; preds = %__except.ret
%call11 = tail call i32 @puts(i8* nonnull getelementptr inbounds ([7 x i8], [7 x i8]* @"\01??_C@_06IBDBCMGJ@caught?$AA@", i64 0, i64 0))
br label %__try.cont.12
__try.cont.12: ; preds = %invoke.cont.3, %entry, %__except.9
ret i32 0
catch.dispatch: ; preds = %entry
%cs1 = catchswitch within none [label %__except] unwind label %catch.dispatch.7
__except: ; preds = %catch.dispatch
%cp1 = catchpad within %cs1 [i8* null]
catchret from %cp1 to label %__except.2
ehcleanup: ; preds = %__except.2
%cp2 = cleanuppad within none []
invoke fastcc void @"\01?fin$0@0@main@@"() #4 [ "funclet"(token %cp2) ]
to label %invoke.cont.6 unwind label %catch.dispatch.7
invoke.cont.6: ; preds = %ehcleanup
cleanupret from %cp2 unwind label %catch.dispatch.7
catch.dispatch.7:
%cs2 = catchswitch within none [label %__except.ret] unwind to caller
__except.ret: ; preds = %catch.dispatch.7
%cp3 = catchpad within %cs2 [i8* bitcast (i32 (i8*, i8*)* @"\01?filt$0@0@main@@" to i8*)]
catchret from %cp3 to label %__except.9
}
; CHECK: main: # @main
; CHECK: .seh_proc main
; CHECK: .seh_handler __C_specific_handler, @unwind, @except
; CHECK: pushq %rbp
; CHECK: .seh_pushreg 5
; CHECK: subq $32, %rsp
; CHECK: .seh_stackalloc 32
; CHECK: leaq 32(%rsp), %rbp
; CHECK: .seh_setframe 5, 32
; CHECK: .seh_endprologue
; CHECK: .Ltmp0:
; CHECK: movl $1, %ecx
; CHECK: xorl %edx, %edx
; CHECK: callq do_div
; CHECK: .Ltmp1:
; CHECK: .LBB1_[[epilogue:[0-9]+]]: # %__try.cont.12
; CHECK: xorl %eax, %eax
; CHECK: addq $32, %rsp
; CHECK: popq %rbp
; CHECK: retq
; CHECK: .LBB1_[[except1bb:[0-9]+]]: # %__except
; CHECK: .Ltmp2:
; CHECK: movl $1, %ecx
; CHECK: xorl %edx, %edx
; CHECK: callq do_div
; CHECK: .Ltmp3:
; CHECK: callq "?fin$0@0@main@@"
; CHECK: jmp .LBB1_[[epilogue]]
; CHECK: .LBB1_[[except2bb:[0-9]+]]: # %__except.ret
; CHECK: leaq "??_C@_06IBDBCMGJ@caught?$AA@"(%rip), %rcx
; CHECK: callq puts
; CHECK: jmp .LBB1_[[epilogue]]
; CHECK: .seh_handlerdata
; CHECK-NEXT: .Lmain$parent_frame_offset = 32
; CHECK-NEXT: .long (.Llsda_end0-.Llsda_begin0)/16
; CHECK-NEXT: .Llsda_begin0:
; CHECK-NEXT: .long .Ltmp0@IMGREL+1
; CHECK-NEXT: .long .Ltmp1@IMGREL+1
; CHECK-NEXT: .long 1
; CHECK-NEXT: .long .LBB1_[[except1bb]]@IMGREL
; CHECK-NEXT: .long .Ltmp0@IMGREL+1
; CHECK-NEXT: .long .Ltmp1@IMGREL+1
; CHECK-NEXT: .long "?filt$0@0@main@@"@IMGREL
; CHECK-NEXT: .long .LBB1_[[except2bb]]@IMGREL
; CHECK-NEXT: .long .Ltmp2@IMGREL+1
; CHECK-NEXT: .long .Ltmp3@IMGREL+1
; CHECK-NEXT: .long "?dtor$[[finbb:[0-9]+]]@?0?main@4HA"@IMGREL
; CHECK-NEXT: .long 0
; CHECK-NEXT: .long .Ltmp2@IMGREL+1
; CHECK-NEXT: .long .Ltmp3@IMGREL+1
; CHECK-NEXT: .long "?filt$0@0@main@@"@IMGREL
; CHECK-NEXT: .long .LBB1_3@IMGREL
; CHECK-NEXT: .long .Ltmp6@IMGREL+1
; CHECK-NEXT: .long .Ltmp7@IMGREL+1
; CHECK-NEXT: .long "?filt$0@0@main@@"@IMGREL
; CHECK-NEXT: .long .LBB1_3@IMGREL
; CHECK-NEXT: .Llsda_end0:
; CHECK: .text
; CHECK: .seh_endproc
; CHECK: "?dtor$[[finbb]]@?0?main@4HA":
; CHECK: .seh_proc "?dtor$[[finbb]]@?0?main@4HA"
; CHECK-NOT: .seh_handler
; CHECK: .LBB1_[[finbb]]: # %ehcleanup
; CHECK: movq %rdx, 16(%rsp)
; CHECK: pushq %rbp
; CHECK: .seh_pushreg 5
; CHECK: subq $32, %rsp
; CHECK: .seh_stackalloc 32
; CHECK: leaq 32(%rdx), %rbp
; CHECK: .seh_endprologue
; CHECK: callq "?fin$0@0@main@@"
; CHECK: nop
; CHECK: addq $32, %rsp
; CHECK: popq %rbp
; CHECK: retq
; CHECK: .seh_handlerdata
; CHECK: .seh_endproc
define internal i32 @"\01?filt$0@0@main@@"(i8* nocapture readnone %exception_pointers, i8* nocapture readnone %frame_pointer) #1 {
entry:
%call = tail call i32 @filt()
ret i32 %call
}
; CHECK: "?filt$0@0@main@@": # @"\01?filt$0@0@main@@"
; CHECK: jmp filt # TAILCALL
declare i32 @filt() #1
declare i32 @__C_specific_handler(...)
; Function Attrs: noinline nounwind
define internal fastcc void @"\01?fin$0@0@main@@"() #2 {
entry:
%call = tail call i32 @puts(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @"\01??_C@_07MKBLAIAL@finally?$AA@", i64 0, i64 0)) #5
ret void
}
; Function Attrs: nounwind
declare i32 @puts(i8* nocapture readonly) #3
attributes #0 = { nounwind readnone "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { noinline nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #3 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-features"="+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #4 = { noinline }
attributes #5 = { nounwind }
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