mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 11:13:28 +01:00
6ef34b9601
The UnwindHelp object is used during exception handling by runtime code. It must be findable from a fixed offset from FP. This change allocates the UnwindHelp object as a fixed object (as is done for x86_64) to ensure that both the generated code and runtime agree on the location of the object. Fixes https://bugs.llvm.org/show_bug.cgi?id=45346 Differential Revision: https://reviews.llvm.org/D77016
70 lines
2.0 KiB
LLVM
70 lines
2.0 KiB
LLVM
; RUN: llc -o - %s -mtriple=aarch64-windows | FileCheck %s
|
|
; Check that we allocate the unwind help stack object in a fixed location from fp
|
|
; so that the runtime can find it when handling an exception
|
|
target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
|
|
target triple = "aarch64-pc-windows-msvc19.25.28611"
|
|
|
|
; Check that the store to the unwind help object for func2 is via FP
|
|
; CHECK-LABEL: ?func2@@YAXXZ
|
|
; CHECK: mov x[[#SCRATCH_REG:]], #-2
|
|
; CHECK: stur x[[#SCRATCH_REG:]], [x29, #[[#]]]
|
|
;
|
|
; // struct that requires greater than stack alignment
|
|
; struct alignas(32) A
|
|
; {
|
|
; // data that would be invalid for unwind help (> 0)
|
|
; int _x[4]{42, 42, 42, 42};
|
|
; ~A() {}
|
|
; };
|
|
;
|
|
; // cause us to run the funclet in func2
|
|
; void func3()
|
|
; {
|
|
; throw 1;
|
|
; }
|
|
;
|
|
; // the funclet that ensures we have the unwind help correct
|
|
; void func2()
|
|
; {
|
|
; A a;
|
|
; func3();
|
|
; }
|
|
;
|
|
; // function to ensure we are misaligned in func2
|
|
; void func1()
|
|
; {
|
|
; func2();
|
|
; }
|
|
;
|
|
; // set things up and ensure alignment for func1
|
|
; void test()
|
|
; {
|
|
; try {
|
|
; A a;
|
|
; func1();
|
|
; } catch(...) {}
|
|
; }
|
|
|
|
%struct.A = type { [4 x i32], [16 x i8] }
|
|
declare dso_local %struct.A* @"??0A@@QEAA@XZ"(%struct.A* returned %0)
|
|
declare dso_local void @"??1A@@QEAA@XZ"(%struct.A* %0)
|
|
declare dso_local i32 @__CxxFrameHandler3(...)
|
|
declare dso_local void @"?func3@@YAXXZ"()
|
|
|
|
; Function Attrs: noinline optnone uwtable
|
|
define dso_local void @"?func2@@YAXXZ"() #0 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
|
|
%1 = alloca %struct.A, align 32
|
|
%2 = call %struct.A* @"??0A@@QEAA@XZ"(%struct.A* %1) #3
|
|
invoke void @"?func3@@YAXXZ"()
|
|
to label %3 unwind label %4
|
|
|
|
3: ; preds = %0
|
|
call void @"??1A@@QEAA@XZ"(%struct.A* %1) #3
|
|
ret void
|
|
|
|
4: ; preds = %0
|
|
%5 = cleanuppad within none []
|
|
call void @"??1A@@QEAA@XZ"(%struct.A* %1) #3 [ "funclet"(token %5) ]
|
|
cleanupret from %5 unwind to caller
|
|
}
|