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; RUN: llc < %s | FileCheck %s
; Generated with this C source:
; static __forceinline void __cpuid() { __asm__(""); }
; void f() {
; __try {
; __cpuid();
; } __except (1) {
; }
; }
; When running clang at -O1, we can end up deleting unreachable SEH catchpads
; without running GlobalDCE to remove the associated filter. This used to
; result in references to undefined labels. Now we check that we emit the
; label. This was PR30431.
; CHECK-LABEL: _f: # @f
; CHECK: Lf$parent_frame_offset = 0
; CHECK: retl
; CHECK-LABEL: "?filt$0@0@f@@": # @"\01?filt$0@0@f@@"
; CHECK: movl $Lf$parent_frame_offset,
; ModuleID = 't.c'
source_filename = "t.c"
target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
target triple = "i386-pc-windows-msvc19.0.24210"
define void @f() #0 personality i8* bitcast (i32 (...)* @_except_handler3 to i8*) {
__try.cont:
%__exception_code = alloca i32, align 4
call void (...) @llvm.localescape(i32* nonnull %__exception_code)
call void asm sideeffect "", "~{dirflag},~{fpsr},~{flags}"() #3, !srcloc !1
ret void
}
; Function Attrs: nounwind
define internal i32 @"\01?filt$0@0@f@@"() #1 {
entry:
%0 = tail call i8* @llvm.frameaddress(i32 1)
%1 = tail call i8* @llvm.x86.seh.recoverfp(i8* bitcast (void ()* @f to i8*), i8* %0)
%2 = tail call i8* @llvm.localrecover(i8* bitcast (void ()* @f to i8*), i8* %1, i32 0)
%__exception_code = bitcast i8* %2 to i32*
%3 = getelementptr inbounds i8, i8* %0, i32 -20
%4 = bitcast i8* %3 to { i32*, i8* }**
%5 = load { i32*, i8* }*, { i32*, i8* }** %4, align 4
%6 = getelementptr inbounds { i32*, i8* }, { i32*, i8* }* %5, i32 0, i32 0
%7 = load i32*, i32** %6, align 4
%8 = load i32, i32* %7, align 4
store i32 %8, i32* %__exception_code, align 4
ret i32 1
}
; Function Attrs: nounwind readnone
declare i8* @llvm.frameaddress(i32) #2
; Function Attrs: nounwind readnone
declare i8* @llvm.x86.seh.recoverfp(i8*, i8*) #2
; Function Attrs: nounwind readnone
declare i8* @llvm.localrecover(i8*, i8*, i32) #2
declare i32 @_except_handler3(...)
; Function Attrs: nounwind
declare void @llvm.localescape(...) #3
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" }
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" }
attributes #2 = { nounwind readnone }
attributes #3 = { nounwind }
!llvm.ident = !{!0}
!0 = !{!"clang version 4.0.0 (trunk 282900) (llvm/trunk 282903)"}
!1 = !{i32 48}
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