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|
; RUN: llc -mtriple arm64-windows -o - %s | FileCheck %s
; struct S { int x; };
; void foo(int n);
; void foo(struct S o);
; void simple_seh() {
; struct S o;
;
; __try { foo(o.x); }
; __finally { foo(o.x); }
; }
; void stack_realign() {
; struct S __declspec(align(32)) o;
;
; __try { foo(o.x); }
; __finally { foo(o.x); }
; }
; void vla_present(int n) {
; int vla[n];
;
; __try { foo(n); }
; __finally { foo(n); }
; }
; void vla_and_realign(int n) {
; struct S __declspec(align(32)) o;
; int vla[n];
;
; __try { foo(o.x); }
; __finally { foo(o.x); }
; }
%struct.S = type { i32 }
; Test simple SEH (__try/__finally).
define void @simple_seh() #0 personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
entry:
; CHECK-LABEL: simple_seh
; CHECK: add x29, sp, #16
; CHECK: mov x0, #-2
; CHECK: stur x0, [x29, #16]
; CHECK: .set .Lsimple_seh$frame_escape_0, -8
; CHECK: ldur w0, [x29, #-8]
; CHECK: bl foo
%o = alloca %struct.S, align 4
call void (...) @llvm.localescape(%struct.S* %o)
%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
%0 = load i32, i32* %x, align 4
invoke void @foo(i32 %0) #5
to label %invoke.cont unwind label %ehcleanup
invoke.cont: ; preds = %entry
%1 = call i8* @llvm.localaddress()
call void @fin_simple_seh(i8 0, i8* %1)
ret void
ehcleanup: ; preds = %entry
%2 = cleanuppad within none []
%3 = call i8* @llvm.localaddress()
call void @fin_simple_seh(i8 1, i8* %3) [ "funclet"(token %2) ]
cleanupret from %2 unwind to caller
}
define void @fin_simple_seh(i8 %abnormal_termination, i8* %frame_pointer) {
entry:
; CHECK-LABEL: fin_simple_seh
; CHECK: movz x8, #:abs_g1_s:.Lsimple_seh$frame_escape_0
; CHECK: movk x8, #:abs_g0_nc:.Lsimple_seh$frame_escape_0
; CHECK: strb w0, [sp, #15]
; CHECK: ldr w0, [x1, x8]
; CHECK: bl foo
%frame_pointer.addr = alloca i8*, align 8
%abnormal_termination.addr = alloca i8, align 1
%0 = call i8* @llvm.localrecover(i8* bitcast (void ()* @simple_seh to i8*), i8* %frame_pointer, i32 0)
%o = bitcast i8* %0 to %struct.S*
store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
store i8 %abnormal_termination, i8* %abnormal_termination.addr, align 1
%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
%1 = load i32, i32* %x, align 4
call void @foo(i32 %1)
ret void
}
; Test SEH when stack realignment is needed in case highly aligned stack objects are present.
define void @stack_realign() #0 personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
entry:
; CHECK-LABEL: stack_realign
; CHECK: mov x29, sp
; CHECK: sub x9, sp, #16
; CHECK: and sp, x9, #0xffffffffffffffe0
; CHECK: mov x19, sp
; CHECK: mov x0, #-2
; CHECK: stur x0, [x29, #32]
; CHECK: .set .Lstack_realign$frame_escape_0, 0
; CHECK: ldr w0, [x19]
; CHECK: bl foo
%o = alloca %struct.S, align 32
call void (...) @llvm.localescape(%struct.S* %o)
%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
%0 = load i32, i32* %x, align 32
invoke void @foo(i32 %0) #5
to label %invoke.cont unwind label %ehcleanup
invoke.cont: ; preds = %entry
%1 = call i8* @llvm.localaddress()
call void @fin_stack_realign(i8 0, i8* %1)
ret void
ehcleanup: ; preds = %entry
%2 = cleanuppad within none []
%3 = call i8* @llvm.localaddress()
call void @fin_stack_realign(i8 1, i8* %3) [ "funclet"(token %2) ]
cleanupret from %2 unwind to caller
}
define void @fin_stack_realign(i8 %abnormal_termination, i8* %frame_pointer) {
entry:
; CHECK-LABEL: fin_stack_realign
; CHECK: movz x8, #:abs_g1_s:.Lstack_realign$frame_escape_0
; CHECK: movk x8, #:abs_g0_nc:.Lstack_realign$frame_escape_0
; CHECK: strb w0, [sp, #15]
; CHECK: ldr w0, [x1, x8]
; CHECK: bl foo
%frame_pointer.addr = alloca i8*, align 8
%abnormal_termination.addr = alloca i8, align 1
%0 = call i8* @llvm.localrecover(i8* bitcast (void ()* @stack_realign to i8*), i8* %frame_pointer, i32 0)
%o = bitcast i8* %0 to %struct.S*
store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
store i8 %abnormal_termination, i8* %abnormal_termination.addr, align 1
%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
%1 = load i32, i32* %x, align 32
call void @foo(i32 %1)
ret void
}
; Test SEH when variable size objects are present on the stack. Note: Escaped vla's are current not supported by SEH.
define void @vla_present(i32 %n) #0 personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
entry:
; CHECK-LABEL: vla_present
; CHECK: add x29, sp, #32
; CHECK: mov x1, #-2
; CHECK: stur x1, [x29, #16]
; CHECK: .set .Lvla_present$frame_escape_0, -4
; CHECK: stur w0, [x29, #-4]
; CHECK: ldur w8, [x29, #-4]
; CHECK: mov x9, sp
; CHECK: stur x9, [x29, #-16]
; CHECK: stur x8, [x29, #-24]
; CHECK: ldur w0, [x29, #-4]
; CHECK: bl foo
%n.addr = alloca i32, align 4
%saved_stack = alloca i8*, align 8
%__vla_expr0 = alloca i64, align 8
call void (...) @llvm.localescape(i32* %n.addr)
store i32 %n, i32* %n.addr, align 4
%0 = load i32, i32* %n.addr, align 4
%1 = zext i32 %0 to i64
%2 = call i8* @llvm.stacksave()
store i8* %2, i8** %saved_stack, align 8
%vla = alloca i32, i64 %1, align 4
store i64 %1, i64* %__vla_expr0, align 8
%3 = load i32, i32* %n.addr, align 4
invoke void @foo(i32 %3) #5
to label %invoke.cont unwind label %ehcleanup
invoke.cont: ; preds = %entry
%4 = call i8* @llvm.localaddress()
call void @fin_vla_present(i8 0, i8* %4)
%5 = load i8*, i8** %saved_stack, align 8
call void @llvm.stackrestore(i8* %5)
ret void
ehcleanup: ; preds = %entry
%6 = cleanuppad within none []
%7 = call i8* @llvm.localaddress()
call void @fin_vla_present(i8 1, i8* %7) [ "funclet"(token %6) ]
cleanupret from %6 unwind to caller
}
define void @fin_vla_present(i8 %abnormal_termination, i8* %frame_pointer) {
entry:
; CHECK-LABEL: fin_vla_present
; CHECK: movz x8, #:abs_g1_s:.Lvla_present$frame_escape_0
; CHECK: movk x8, #:abs_g0_nc:.Lvla_present$frame_escape_0
; CHECK: strb w0, [sp, #15]
; CHECK: ldr w0, [x1, x8]
; CHECK: bl foo
%frame_pointer.addr = alloca i8*, align 8
%abnormal_termination.addr = alloca i8, align 1
%0 = call i8* @llvm.localrecover(i8* bitcast (void (i32)* @vla_present to i8*), i8* %frame_pointer, i32 0)
%n.addr = bitcast i8* %0 to i32*
store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
store i8 %abnormal_termination, i8* %abnormal_termination.addr, align 1
%1 = load i32, i32* %n.addr, align 4
call void @foo(i32 %1)
ret void
}
; Test when both vla's and highly aligned objects are present on stack.
define void @vla_and_realign(i32 %n) #0 personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
entry:
; CHECK-LABEL: vla_and_realign
; CHECK: mov x29, sp
; CHECK: sub x9, sp, #48
; CHECK: and sp, x9, #0xffffffffffffffe0
; CHECK: mov x19, sp
; CHECK: mov x1, #-2
; CHECK: stur x1, [x29, #32]
; CHECK: .set .Lvla_and_realign$frame_escape_0, 32
; CHECK: str w0, [x29, #44]
; CHECK: ldr w8, [x29, #44]
; CHECK: mov x9, sp
; CHECK: str x9, [x29, #24]
; CHECK: str x8, [x19, #24]
; CHECK: ldr w0, [x19, #32]
; CHECK: bl foo
%n.addr = alloca i32, align 4
%o = alloca %struct.S, align 32
%saved_stack = alloca i8*, align 8
%__vla_expr0 = alloca i64, align 8
call void (...) @llvm.localescape(%struct.S* %o)
store i32 %n, i32* %n.addr, align 4
%0 = load i32, i32* %n.addr, align 4
%1 = zext i32 %0 to i64
%2 = call i8* @llvm.stacksave()
store i8* %2, i8** %saved_stack, align 8
%vla = alloca i32, i64 %1, align 4
store i64 %1, i64* %__vla_expr0, align 8
%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
%3 = load i32, i32* %x, align 32
invoke void @foo(i32 %3) #5
to label %invoke.cont unwind label %ehcleanup
invoke.cont: ; preds = %entry
%4 = call i8* @llvm.localaddress()
call void @fin_vla_and_realign(i8 0, i8* %4)
%5 = load i8*, i8** %saved_stack, align 8
call void @llvm.stackrestore(i8* %5)
ret void
ehcleanup: ; preds = %entry
%6 = cleanuppad within none []
%7 = call i8* @llvm.localaddress()
call void @fin_vla_and_realign(i8 1, i8* %7) [ "funclet"(token %6) ]
cleanupret from %6 unwind to caller
}
define void @fin_vla_and_realign(i8 %abnormal_termination, i8* %frame_pointer) {
entry:
; CHECK-LABEL: fin_vla_and_realign
; CHECK: movz x8, #:abs_g1_s:.Lvla_and_realign$frame_escape_0
; CHECK: movk x8, #:abs_g0_nc:.Lvla_and_realign$frame_escape_0
; CHECK: strb w0, [sp, #15]
; CHECK: ldr w0, [x1, x8]
; CHECK: bl foo
%frame_pointer.addr = alloca i8*, align 8
%abnormal_termination.addr = alloca i8, align 1
%0 = call i8* @llvm.localrecover(i8* bitcast (void (i32)* @vla_and_realign to i8*), i8* %frame_pointer, i32 0)
%o = bitcast i8* %0 to %struct.S*
store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
store i8 %abnormal_termination, i8* %abnormal_termination.addr, align 1
%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
%1 = load i32, i32* %x, align 32
call void @foo(i32 %1)
ret void
}
declare void @foo(i32)
declare void @llvm.stackrestore(i8*)
declare i8* @llvm.stacksave()
declare i8* @llvm.localrecover(i8*, i8*, i32)
declare i8* @llvm.localaddress()
declare void @llvm.localescape(...)
declare i32 @__C_specific_handler(...)
attributes #0 = { noinline optnone }
|
