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+; 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 i8* @llvm.eh.begincatch(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: %2 = call i8* @llvm.eh.begincatch(i8* %exn)
+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
+ %2 = call i8* @llvm.eh.begincatch(i8* %exn)
+ 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: %2 = call i8* @llvm.eh.begincatch(i8* %exn)
+; CHECK-NEXT: %3 = call i8* @llvm.eh.begincatch(i8* %exn)
+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
+ %2 = call i8* @llvm.eh.begincatch(i8* %exn)
+ call void @_Z10handle_intv()
+ br label %invoke.cont2
+
+invoke.cont2: ; preds = %catch
+ %3 = call i8* @llvm.eh.begincatch(i8* %exn)
+ 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
+ %2 = call i8* @llvm.eh.begincatch(i8* %exn)
+ 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: %0 = call i8* @llvm.eh.begincatch(i8* %exn)
+entry:
+ %exn = alloca i8
+ %0 = call i8* @llvm.eh.begincatch(i8* %exn)
+ 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: %3 = call i8* @llvm.eh.begincatch(i8* %exn2)
+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]
+ %3 = call i8* @llvm.eh.begincatch(i8* %exn2)
+ 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: %3 = call i8* @llvm.eh.begincatch(i8* %exn2)
+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]
+ %3 = call i8* @llvm.eh.begincatch(i8* %exn2)
+ 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()
+
generated by cgit v1.1 at 2025-07-03 13:41:23 +0000