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