forked from OSchip/llvm-project
115 lines
4.1 KiB
LLVM
115 lines
4.1 KiB
LLVM
; RUN: llc -mtriple=i686-pc-windows-msvc < %s | FileCheck %s
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; Based on this source:
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; extern "C" void may_throw(int);
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; void f() {
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; try {
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; may_throw(1);
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; try {
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; may_throw(2);
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; } catch (int) {
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; may_throw(3);
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; }
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; } catch (int) {
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; may_throw(4);
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; }
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; }
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%rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
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%eh.CatchHandlerType = type { i32, i8* }
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declare void @may_throw(i32)
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declare i32 @__CxxFrameHandler3(...)
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declare void @llvm.eh.begincatch(i8*, i8*)
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declare void @llvm.eh.endcatch()
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declare i32 @llvm.eh.typeid.for(i8*)
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$"\01??_R0H@8" = comdat any
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@"\01??_7type_info@@6B@" = external constant i8*
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@"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
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@llvm.eh.handlertype.H.0 = private unnamed_addr constant %eh.CatchHandlerType { i32 0, i8* bitcast (%rtti.TypeDescriptor2* @"\01??_R0H@8" to i8*) }, section "llvm.metadata"
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define void @f() #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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entry:
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invoke void @may_throw(i32 1)
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to label %invoke.cont unwind label %lpad
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invoke.cont: ; preds = %entry
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invoke void @may_throw(i32 2)
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to label %try.cont.9 unwind label %lpad.1
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try.cont.9: ; preds = %invoke.cont.3, %invoke.cont, %catch.7
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; FIXME: Something about our CFG breaks TailDuplication. This empy asm blocks
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; it so we can focus on testing the state numbering.
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call void asm sideeffect "", "~{dirflag},~{fpsr},~{flags}"()
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ret void
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lpad: ; preds = %catch, %entry
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%0 = landingpad { i8*, i32 }
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catch %eh.CatchHandlerType* @llvm.eh.handlertype.H.0
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%1 = extractvalue { i8*, i32 } %0, 0
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%2 = extractvalue { i8*, i32 } %0, 1
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br label %catch.dispatch.4
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lpad.1: ; preds = %invoke.cont
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%3 = landingpad { i8*, i32 }
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catch i8* bitcast (%eh.CatchHandlerType* @llvm.eh.handlertype.H.0 to i8*)
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%4 = extractvalue { i8*, i32 } %3, 0
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%5 = extractvalue { i8*, i32 } %3, 1
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%6 = tail call i32 @llvm.eh.typeid.for(i8* bitcast (%eh.CatchHandlerType* @llvm.eh.handlertype.H.0 to i8*)) #3
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%matches = icmp eq i32 %5, %6
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br i1 %matches, label %catch, label %catch.dispatch.4
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catch.dispatch.4: ; preds = %lpad.1, %lpad
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%exn.slot.0 = phi i8* [ %4, %lpad.1 ], [ %1, %lpad ]
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%ehselector.slot.0 = phi i32 [ %5, %lpad.1 ], [ %2, %lpad ]
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%.pre = tail call i32 @llvm.eh.typeid.for(i8* bitcast (%eh.CatchHandlerType* @llvm.eh.handlertype.H.0 to i8*)) #3
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%matches6 = icmp eq i32 %ehselector.slot.0, %.pre
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br i1 %matches6, label %catch.7, label %eh.resume
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catch.7: ; preds = %catch.dispatch.4
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tail call void @llvm.eh.begincatch(i8* %exn.slot.0, i8* null) #3
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tail call void @may_throw(i32 4)
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tail call void @llvm.eh.endcatch() #3
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br label %try.cont.9
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catch: ; preds = %lpad.1
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tail call void @llvm.eh.begincatch(i8* %4, i8* null) #3
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invoke void @may_throw(i32 3)
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to label %invoke.cont.3 unwind label %lpad
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invoke.cont.3: ; preds = %catch
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tail call void @llvm.eh.endcatch() #3
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br label %try.cont.9
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eh.resume: ; preds = %catch.dispatch.4
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%lpad.val = insertvalue { i8*, i32 } undef, i8* %exn.slot.0, 0
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%lpad.val.12 = insertvalue { i8*, i32 } %lpad.val, i32 %ehselector.slot.0, 1
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resume { i8*, i32 } %lpad.val.12
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}
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; CHECK-LABEL: _f:
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; CHECK: movl $-1, [[state:[-0-9]+]](%ebp)
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; CHECK: movl $___ehhandler$f, {{.*}}
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;
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; CHECK: movl $0, [[state]](%ebp)
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; CHECK: movl $1, (%esp)
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; CHECK: calll _may_throw
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;
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; CHECK: movl $1, [[state]](%ebp)
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; CHECK: movl $2, (%esp)
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; CHECK: calll _may_throw
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; CHECK-LABEL: _f.catch:
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; CHECK: movl $4, Lf$frame_escape_{{[0-9]+.*}}
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; CHECK: movl $4, (%esp)
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; CHECK: calll _may_throw
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; CHECK-LABEL: _f.catch.1:
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; CHECK: movl $3, Lf$frame_escape_{{[0-9]+.*}}
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; CHECK: movl $3, (%esp)
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; CHECK: calll _may_throw
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; CHECK: .safeseh ___ehhandler$f
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