[WinEH] Split blocks at calls to llvm.eh.begincatch
Differential Revision: http://reviews.llvm.org/D9311
llvm-svn: 236046
diff --git a/llvm/test/CodeGen/WinEH/cppeh-mixed-catch-and-cleanup.ll b/llvm/test/CodeGen/WinEH/cppeh-mixed-catch-and-cleanup.ll
new file mode 100644
index 0000000..52f6132
--- /dev/null
+++ b/llvm/test/CodeGen/WinEH/cppeh-mixed-catch-and-cleanup.ll
@@ -0,0 +1,106 @@
+; RUN: opt -mtriple=x86_64-pc-windows-msvc -winehprepare -S -o - < %s | FileCheck %s
+
+; This test is based on the following code:
+;
+; void test()
+; {
+; try {
+; Obj o;
+; may_throw();
+; } catch (...) {
+; }
+; }
+;
+; The purpose of this test is to verify that we create separate catch and
+; cleanup handlers. When compiling for the C++ 11 standard, this isn't
+; strictly necessary, since calling the destructor from the catch handler
+; would be logically equivalent to calling it from a cleanup handler.
+; However, if the -std=c++98 option is used, an exception in the cleanup
+; code should terminate the process (the MSVCRT runtime will do that) but
+; if the destructor is called from the catch handler, it wouldn't terminate
+; the process
+
+
+; ModuleID = 'cppeh-mixed-catch-and-cleanup.cpp'
+target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-windows-msvc"
+
+%class.Obj = type { i8 }
+
+; This just verifies that the function was processed by WinEHPrepare.
+;
+; CHECK-LABEL: define void @"\01?test@@YAXXZ"()
+; CHECK: entry:
+; CHECK: call void (...) @llvm.frameescape
+; CHECK: }
+
+; Function Attrs: nounwind uwtable
+define void @"\01?test@@YAXXZ"() #0 {
+entry:
+ %o = alloca %class.Obj, align 1
+ %exn.slot = alloca i8*
+ %ehselector.slot = alloca i32
+ invoke void @"\01?may_throw@@YAXXZ"()
+ to label %invoke.cont unwind label %lpad
+
+invoke.cont: ; preds = %entry
+ call void @"\01??1Obj@@QEAA@XZ"(%class.Obj* %o) #3
+ br label %try.cont
+
+lpad: ; preds = %entry
+ %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*)
+ catch i8* null
+ %1 = extractvalue { i8*, i32 } %0, 0
+ store i8* %1, i8** %exn.slot
+ %2 = extractvalue { i8*, i32 } %0, 1
+ store i32 %2, i32* %ehselector.slot
+ call void @"\01??1Obj@@QEAA@XZ"(%class.Obj* %o) #3
+ %exn = load i8*, i8** %exn.slot
+ call void @llvm.eh.begincatch(i8* %exn, i8* null) #3
+ call void @llvm.eh.endcatch() #3
+ br label %try.cont
+
+try.cont: ; preds = %catch, %invoke.cont
+ ret void
+}
+
+; Verify that a cleanup handler was created and that it calls ~Obj().
+; CHECK-LABEL: define internal void @"\01?test@@YAXXZ.cleanup"(i8*, i8*)
+; CHECK: entry:
+; CHECK: @llvm.framerecover(i8* bitcast (void ()* @"\01?test@@YAXXZ" to i8*), i8* %1, i32 0)
+; CHECK: call void @"\01??1Obj@@QEAA@XZ"
+; CHECK: ret void
+; CHECK: }
+
+; Verify that a catch handler was created and that it does not call ~Obj().
+; CHECK-LABEL: define internal i8* @"\01?test@@YAXXZ.catch"(i8*, i8*)
+; CHECK: entry:
+; CHECK-NOT: call void @"\01??1Obj@@QEAA@XZ"
+; CHECK: ret i8* blockaddress(@"\01?test@@YAXXZ", %try.cont)
+; CHECK: }
+
+
+
+declare void @"\01?may_throw@@YAXXZ"() #1
+
+declare i32 @__CxxFrameHandler3(...)
+
+; Function Attrs: nounwind
+declare void @"\01??1Obj@@QEAA@XZ"(%class.Obj*) #2
+
+; Function Attrs: nounwind
+declare void @llvm.eh.begincatch(i8* nocapture, i8* nocapture) #3
+
+; Function Attrs: nounwind
+declare void @llvm.eh.endcatch() #3
+
+attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #3 = { nounwind }
+
+!llvm.module.flags = !{!0}
+!llvm.ident = !{!1}
+
+!0 = !{i32 1, !"PIC Level", i32 2}
+!1 = !{!"clang version 3.7.0 (trunk 235779) (llvm/trunk 235769)"}