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| ; RUN: llc -mtriple=x86_64-windows-gnu %s -o - | FileCheck %s
; Based on this C++ code:
; struct as {
; as() { at = static_cast<int *>(operator new(sizeof(int))); }
; ~as() { operator delete(at); }
; int *at;
; };
; void am(int) {
; static as au;
; as av;
; throw 0;
; }
; optnone was added to ensure that branch folding and block layout are not
; disturbed. The key thing about this test is that it ends in an empty
; unreachable block, which forces us to scan back across blocks.
; CHECK: _Z2ami:
; CHECK: callq __cxa_throw
; CHECK: # %eh.resume
; CHECK: callq _Unwind_Resume
; CHECK-NEXT: int3
; CHECK-NEXT: # %unreachable
; CHECK-NEXT: .Lfunc_end0:
%struct.as = type { i32* }
@_ZZ2amiE2au = internal unnamed_addr global %struct.as zeroinitializer, align 8
@_ZGVZ2amiE2au = internal global i64 0, align 8
@_ZTIi = external constant i8*
define dso_local void @_Z2ami(i32 %0) noinline optnone personality i8* bitcast (i32 (...)* @__gxx_personality_seh0 to i8*) {
entry:
%1 = load atomic i8, i8* bitcast (i64* @_ZGVZ2amiE2au to i8*) acquire, align 8
%guard.uninitialized = icmp eq i8 %1, 0
br i1 %guard.uninitialized, label %init.check, label %init.end
init.check: ; preds = %entry
%2 = tail call i32 @__cxa_guard_acquire(i64* nonnull @_ZGVZ2amiE2au)
%tobool = icmp eq i32 %2, 0
br i1 %tobool, label %init.end, label %init
init: ; preds = %init.check
%call.i3 = invoke i8* @_Znwy(i64 4)
to label %invoke.cont unwind label %lpad
invoke.cont: ; preds = %init
store i8* %call.i3, i8** bitcast (%struct.as* @_ZZ2amiE2au to i8**), align 8
%3 = tail call i32 @atexit(void ()* nonnull @__dtor__ZZ2amiE2au)
tail call void @__cxa_guard_release(i64* nonnull @_ZGVZ2amiE2au)
br label %init.end
init.end: ; preds = %init.check, %invoke.cont, %entry
%call.i = tail call i8* @_Znwy(i64 4)
%exception = tail call i8* @__cxa_allocate_exception(i64 4)
%4 = bitcast i8* %exception to i32*
store i32 0, i32* %4, align 16
invoke void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* null)
to label %unreachable unwind label %lpad1
lpad: ; preds = %init
%5 = landingpad { i8*, i32 }
cleanup
%6 = extractvalue { i8*, i32 } %5, 0
%7 = extractvalue { i8*, i32 } %5, 1
tail call void @__cxa_guard_abort(i64* nonnull @_ZGVZ2amiE2au)
br label %eh.resume
lpad1: ; preds = %init.end
%8 = landingpad { i8*, i32 }
cleanup
%9 = extractvalue { i8*, i32 } %8, 0
%10 = extractvalue { i8*, i32 } %8, 1
tail call void @_ZdlPv(i8* %call.i)
br label %eh.resume
eh.resume: ; preds = %lpad1, %lpad
%exn.slot.0 = phi i8* [ %9, %lpad1 ], [ %6, %lpad ]
%ehselector.slot.0 = phi i32 [ %10, %lpad1 ], [ %7, %lpad ]
%lpad.val = insertvalue { i8*, i32 } undef, i8* %exn.slot.0, 0
%lpad.val2 = insertvalue { i8*, i32 } %lpad.val, i32 %ehselector.slot.0, 1
resume { i8*, i32 } %lpad.val2
unreachable: ; preds = %init.end
unreachable
}
declare dso_local i32 @__cxa_guard_acquire(i64*)
declare dso_local i32 @__gxx_personality_seh0(...)
declare dso_local void @__dtor__ZZ2amiE2au()
declare dso_local i32 @atexit(void ()*)
declare dso_local void @__cxa_guard_abort(i64*)
declare dso_local void @__cxa_guard_release(i64*)
declare dso_local i8* @__cxa_allocate_exception(i64)
declare dso_local void @__cxa_throw(i8*, i8*, i8*)
declare dso_local noalias i8* @_Znwy(i64)
declare dso_local void @_ZdlPv(i8*)
|