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' 25source_filename = "t.c" 26target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 27target triple = "i386-pc-windows-msvc19.0.24210" 28 29define void @f() #0 personality ptr @_except_handler3 { 30__try.cont: 31 %__exception_code = alloca i32, align 4 32 call void (...) @llvm.localescape(ptr nonnull %__exception_code) 33 call void asm sideeffect "", "~{dirflag},~{fpsr},~{flags}"() #3, !srcloc !1 34 ret void 35} 36 37; Function Attrs: nounwind 38define internal i32 @"\01?filt$0@0@f@@"() #1 { 39entry: 40 %0 = tail call ptr @llvm.frameaddress(i32 1) 41 %1 = tail call ptr @llvm.eh.recoverfp(ptr @f, ptr %0) 42 %2 = tail call ptr @llvm.localrecover(ptr @f, ptr %1, i32 0) 43 %3 = getelementptr inbounds i8, ptr %0, i32 -20 44 %4 = load ptr, ptr %3, align 4 45 %5 = getelementptr inbounds { ptr, ptr }, ptr %4, i32 0, i32 0 46 %6 = load ptr, ptr %5, align 4 47 %7 = load i32, ptr %6, align 4 48 store i32 %7, ptr %2, align 4 49 ret i32 1 50} 51 52; Function Attrs: nounwind readnone 53declare ptr @llvm.frameaddress(i32) #2 54 55; Function Attrs: nounwind readnone 56declare ptr @llvm.eh.recoverfp(ptr, ptr) #2 57 58; Function Attrs: nounwind readnone 59declare ptr @llvm.localrecover(ptr, ptr, i32) #2 60 61declare i32 @_except_handler3(...) 62 63; Function Attrs: nounwind 64declare void @llvm.localescape(...) #3 65 66attributes #0 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "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" } 67attributes #1 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "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" } 68attributes #2 = { nounwind readnone } 69attributes #3 = { nounwind } 70 71!llvm.ident = !{!0} 72 73!0 = !{!"clang version 4.0.0 (trunk 282900) (llvm/trunk 282903)"} 74!1 = !{i32 48} 75