; RUN: opt -lint -disable-output < %s 2>&1 | FileCheck %s
; This test is meant to prove that the Verifier is able to identify a variety
; of errors with the llvm.eh.begincatch and llvm.eh.endcatch intrinsics.
; See cppeh-catch-intrinsics-clean for correct uses.
target triple = "x86_64-pc-windows-msvc"
declare void @llvm.eh.begincatch(i8*, i8*)
declare void @llvm.eh.endcatch()
@_ZTIi = external constant i8*
; Function Attrs: uwtable
define void @test_missing_endcatch() {
; CHECK: Some paths from llvm.eh.begincatch may not reach llvm.eh.endcatch
; CHECK-NEXT: call void @llvm.eh.begincatch(i8* %exn, i8* null)
entry:
invoke void @_Z9may_throwv()
to label %try.cont unwind label %lpad
lpad: ; preds = %entry
%0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
catch i8* bitcast (i8** @_ZTIi to i8*)
%exn = extractvalue { i8*, i32 } %0, 0
%sel = extractvalue { i8*, i32 } %0, 1
%1 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches = icmp eq i32 %sel, %1
br i1 %matches, label %catch, label %eh.resume
catch: ; preds = %lpad
call void @llvm.eh.begincatch(i8* %exn, i8* null)
call void @_Z10handle_intv()
br label %invoke.cont2
invoke.cont2: ; preds = %catch
br label %try.cont
try.cont: ; preds = %invoke.cont2, %entry
ret void
eh.resume: ; preds = %catch.dispatch
resume { i8*, i32 } %0
}
; Function Attrs: uwtable
define void @test_missing_begincatch() {
; CHECK: llvm.eh.endcatch may be reachable without passing llvm.eh.begincatch
; CHECK-NEXT: call void @llvm.eh.endcatch()
entry:
invoke void @_Z9may_throwv()
to label %try.cont unwind label %lpad
lpad: ; preds = %entry
%0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
catch i8* bitcast (i8** @_ZTIi to i8*)
%exn = extractvalue { i8*, i32 } %0, 0
%sel = extractvalue { i8*, i32 } %0, 1
%1 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches = icmp eq i32 %sel, %1
br i1 %matches, label %catch, label %eh.resume
catch: ; preds = %lpad
call void @_Z10handle_intv()
br label %invoke.cont2
invoke.cont2: ; preds = %catch
call void @llvm.eh.endcatch()
br label %try.cont
try.cont: ; preds = %invoke.cont2, %entry
ret void
eh.resume: ; preds = %catch.dispatch
resume { i8*, i32 } %0
}
; Function Attrs: uwtable
define void @test_multiple_begin() {
; CHECK: llvm.eh.begincatch may be called a second time before llvm.eh.endcatch
; CHECK-NEXT: call void @llvm.eh.begincatch(i8* %exn, i8* null)
; CHECK-NEXT: call void @llvm.eh.begincatch(i8* %exn, i8* null)
entry:
invoke void @_Z9may_throwv()
to label %try.cont unwind label %lpad
lpad: ; preds = %entry
%0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
catch i8* bitcast (i8** @_ZTIi to i8*)
%exn = extractvalue { i8*, i32 } %0, 0
%sel = extractvalue { i8*, i32 } %0, 1
%1 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches = icmp eq i32 %sel, %1
br i1 %matches, label %catch, label %eh.resume
catch: ; preds = %lpad
call void @llvm.eh.begincatch(i8* %exn, i8* null)
call void @_Z10handle_intv()
br label %invoke.cont2
invoke.cont2: ; preds = %catch
call void @llvm.eh.begincatch(i8* %exn, i8* null)
call void @llvm.eh.endcatch()
br label %try.cont
try.cont: ; preds = %invoke.cont2, %entry
ret void
eh.resume: ; preds = %catch.dispatch
resume { i8*, i32 } %0
}
; Function Attrs: uwtable
define void @test_multiple_end() {
; CHECK: llvm.eh.endcatch may be called a second time after llvm.eh.begincatch
; CHECK-NEXT: call void @llvm.eh.endcatch()
; CHECK-NEXT: call void @llvm.eh.endcatch()
entry:
invoke void @_Z9may_throwv()
to label %try.cont unwind label %lpad
lpad: ; preds = %entry
%0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
catch i8* bitcast (i8** @_ZTIi to i8*)
%exn = extractvalue { i8*, i32 } %0, 0
%sel = extractvalue { i8*, i32 } %0, 1
%1 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches = icmp eq i32 %sel, %1
br i1 %matches, label %catch, label %eh.resume
catch: ; preds = %lpad
call void @llvm.eh.begincatch(i8* %exn, i8* null)
call void @_Z10handle_intv()
call void @llvm.eh.endcatch()
br label %invoke.cont2
invoke.cont2: ; preds = %catch
call void @llvm.eh.endcatch()
br label %try.cont
try.cont: ; preds = %invoke.cont2, %entry
ret void
eh.resume: ; preds = %catch.dispatch
resume { i8*, i32 } %0
}
; Function Attrs: uwtable
define void @test_begincatch_without_lpad() {
; CHECK: llvm.eh.begincatch may be reachable without passing a landingpad
; CHECK-NEXT: call void @llvm.eh.begincatch(i8* %exn, i8* null)
entry:
%exn = alloca i8
call void @llvm.eh.begincatch(i8* %exn, i8* null)
call void @_Z10handle_intv()
br label %invoke.cont2
invoke.cont2: ; preds = %catch
call void @llvm.eh.endcatch()
br label %try.cont
try.cont: ; preds = %invoke.cont2, %entry
ret void
}
; Function Attrs: uwtable
define void @test_branch_to_begincatch_with_no_lpad(i32 %fake.sel) {
; CHECK: llvm.eh.begincatch may be reachable without passing a landingpad
; CHECK-NEXT: call void @llvm.eh.begincatch(i8* %exn2, i8* null)
entry:
%fake.exn = alloca i8
invoke void @_Z9may_throwv()
to label %catch unwind label %lpad
lpad: ; preds = %entry
%0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
catch i8* bitcast (i8** @_ZTIi to i8*)
%exn = extractvalue { i8*, i32 } %0, 0
%sel = extractvalue { i8*, i32 } %0, 1
%1 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches = icmp eq i32 %sel, %1
br i1 %matches, label %catch, label %eh.resume
invoke void @_Z9may_throwv()
to label %try.cont unwind label %lpad
catch: ; preds = %lpad, %entry
%exn2 = phi i8* [%exn, %lpad], [%fake.exn, %entry]
%sel2 = phi i32 [%sel, %lpad], [%fake.sel, %entry]
call void @llvm.eh.begincatch(i8* %exn2, i8* null)
call void @_Z10handle_intv()
%matches1 = icmp eq i32 %sel2, 0
br i1 %matches1, label %invoke.cont2, label %invoke.cont3
invoke.cont2: ; preds = %catch
call void @llvm.eh.endcatch()
br label %try.cont
invoke.cont3: ; preds = %catch
call void @llvm.eh.endcatch()
br label %eh.resume
try.cont: ; preds = %invoke.cont2
ret void
eh.resume: ; preds = %catch.dispatch
%lpad.val = insertvalue { i8*, i32 } undef, i32 0, 1
resume { i8*, i32 } %lpad.val
}
; Function Attrs: uwtable
define void @test_branch_missing_endcatch() {
; CHECK: Some paths from llvm.eh.begincatch may not reach llvm.eh.endcatch
; CHECK-NEXT: call void @llvm.eh.begincatch(i8* %exn2, i8* null)
entry:
invoke void @_Z9may_throwv()
to label %invoke.cont unwind label %lpad
invoke.cont:
invoke void @_Z9may_throwv()
to label %invoke.cont unwind label %lpad1
lpad: ; preds = %entry
%0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
catch i8* bitcast (i8** @_ZTIi to i8*)
%exn = extractvalue { i8*, i32 } %0, 0
%sel = extractvalue { i8*, i32 } %0, 1
%1 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches = icmp eq i32 %sel, %1
br i1 %matches, label %catch, label %eh.resume
invoke void @_Z9may_throwv()
to label %try.cont unwind label %lpad
lpad1: ; preds = %entry
%l1.0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
cleanup
catch i8* bitcast (i8** @_ZTIi to i8*)
%exn1 = extractvalue { i8*, i32 } %l1.0, 0
%sel1 = extractvalue { i8*, i32 } %l1.0, 1
%l1.1 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matchesl1 = icmp eq i32 %sel1, %l1.1
br i1 %matchesl1, label %catch, label %eh.resume
catch: ; preds = %lpad, %lpad1
%exn2 = phi i8* [%exn, %lpad], [%exn1, %lpad1]
%sel2 = phi i32 [%sel, %lpad], [%sel1, %lpad1]
call void @llvm.eh.begincatch(i8* %exn2, i8* null)
call void @_Z10handle_intv()
%matches1 = icmp eq i32 %sel2, 0
br i1 %matches1, label %invoke.cont2, label %invoke.cont3
invoke.cont2: ; preds = %catch
call void @llvm.eh.endcatch()
br label %try.cont
invoke.cont3: ; preds = %catch
br label %eh.resume
try.cont: ; preds = %invoke.cont2, %entry
ret void
eh.resume: ; preds = %catch.dispatch
%lpad.val = insertvalue { i8*, i32 } undef, i32 0, 1
resume { i8*, i32 } %lpad.val
}
declare void @_Z9may_throwv()
declare i32 @__CxxFrameHandler3(...)
; Function Attrs: nounwind readnone
declare i32 @llvm.eh.typeid.for(i8*)
declare void @_Z10handle_intv()