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      1 ; RUN: llc < %s | FileCheck %s
      2 
      3 ; Generated with this C source:
      4 ; static __forceinline void __cpuid() { __asm__(""); }
      5 ; void f() {
      6 ;   __try {
      7 ;     __cpuid();
      8 ;   } __except (1) {
      9 ;   }
     10 ; }
     11 
     12 ; When running clang at -O1, we can end up deleting unreachable SEH catchpads
     13 ; without running GlobalDCE to remove the associated filter. This used to
     14 ; result in references to undefined labels. Now we check that we emit the
     15 ; label. This was PR30431.
     16 
     17 ; CHECK-LABEL: _f:                                     # @f
     18 ; CHECK: .set Lf$parent_frame_offset, 0
     19 ; CHECK: retl
     20 
     21 ; CHECK-LABEL: "?filt$0@0@f@@":                        # @"\01?filt$0@0@f@@"
     22 ; CHECK: movl    $Lf$parent_frame_offset,
     23 
     24 ; ModuleID = 't.c'
     25 source_filename = "t.c"
     26 target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
     27 target triple = "i386-pc-windows-msvc19.0.24210"
     28 
     29 define void @f() #0 personality i8* bitcast (i32 (...)* @_except_handler3 to i8*) {
     30 __try.cont:
     31   %__exception_code = alloca i32, align 4
     32   call void (...) @llvm.localescape(i32* nonnull %__exception_code)
     33   call void asm sideeffect "", "~{dirflag},~{fpsr},~{flags}"() #3, !srcloc !1
     34   ret void
     35 }
     36 
     37 ; Function Attrs: nounwind
     38 define internal i32 @"\01?filt$0@0@f@@"() #1 {
     39 entry:
     40   %0 = tail call i8* @llvm.frameaddress(i32 1)
     41   %1 = tail call i8* @llvm.x86.seh.recoverfp(i8* bitcast (void ()* @f to i8*), i8* %0)
     42   %2 = tail call i8* @llvm.localrecover(i8* bitcast (void ()* @f to i8*), i8* %1, i32 0)
     43   %__exception_code = bitcast i8* %2 to i32*
     44   %3 = getelementptr inbounds i8, i8* %0, i32 -20
     45   %4 = bitcast i8* %3 to { i32*, i8* }**
     46   %5 = load { i32*, i8* }*, { i32*, i8* }** %4, align 4
     47   %6 = getelementptr inbounds { i32*, i8* }, { i32*, i8* }* %5, i32 0, i32 0
     48   %7 = load i32*, i32** %6, align 4
     49   %8 = load i32, i32* %7, align 4
     50   store i32 %8, i32* %__exception_code, align 4
     51   ret i32 1
     52 }
     53 
     54 ; Function Attrs: nounwind readnone
     55 declare i8* @llvm.frameaddress(i32) #2
     56 
     57 ; Function Attrs: nounwind readnone
     58 declare i8* @llvm.x86.seh.recoverfp(i8*, i8*) #2
     59 
     60 ; Function Attrs: nounwind readnone
     61 declare i8* @llvm.localrecover(i8*, i8*, i32) #2
     62 
     63 declare i32 @_except_handler3(...)
     64 
     65 ; Function Attrs: nounwind
     66 declare void @llvm.localescape(...) #3
     67 
     68 attributes #0 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="pentium4" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
     69 attributes #1 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="pentium4" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
     70 attributes #2 = { nounwind readnone }
     71 attributes #3 = { nounwind }
     72 
     73 !llvm.ident = !{!0}
     74 
     75 !0 = !{!"clang version 4.0.0 (trunk 282900) (llvm/trunk 282903)"}
     76 !1 = !{i32 48}
     77