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https://github.com/RPCS3/llvm-mirror.git
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9cf3ca95c2
Summary: This fixes using the correct stack registers for SEH when stack realignment is needed or when variable size objects are present. Reviewers: rnk, efriedma, ssijaric, TomTan Reviewed By: rnk, efriedma Subscribers: javed.absar, kristof.beyls, llvm-commits Differential Revision: https://reviews.llvm.org/D57183 llvm-svn: 352923
284 lines
9.7 KiB
LLVM
284 lines
9.7 KiB
LLVM
; RUN: llc -mtriple arm64-windows -o - %s | FileCheck %s
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; struct S { int x; };
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; void foo(int n);
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; void foo(struct S o);
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; void simple_seh() {
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; struct S o;
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;
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; __try { foo(o.x); }
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; __finally { foo(o.x); }
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; }
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; void stack_realign() {
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; struct S __declspec(align(32)) o;
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;
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; __try { foo(o.x); }
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; __finally { foo(o.x); }
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; }
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; void vla_present(int n) {
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; int vla[n];
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;
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; __try { foo(n); }
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; __finally { foo(n); }
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; }
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; void vla_and_realign(int n) {
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; struct S __declspec(align(32)) o;
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; int vla[n];
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;
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; __try { foo(o.x); }
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; __finally { foo(o.x); }
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; }
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%struct.S = type { i32 }
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; Test simple SEH (__try/__finally).
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define void @simple_seh() #0 personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
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entry:
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; CHECK-LABEL: simple_seh
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; CHECK: add x29, sp, #16
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; CHECK: orr x1, xzr, #0xfffffffffffffffe
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; CHECK: stur x1, [x29, #-16]
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; CHECK: .set .Lsimple_seh$frame_escape_0, -8
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; CHECK: ldur w0, [x29, #-8]
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; CHECK: bl foo
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%o = alloca %struct.S, align 4
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call void (...) @llvm.localescape(%struct.S* %o)
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%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
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%0 = load i32, i32* %x, align 4
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invoke void @foo(i32 %0) #5
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to label %invoke.cont unwind label %ehcleanup
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invoke.cont: ; preds = %entry
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%1 = call i8* @llvm.localaddress()
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call void @fin_simple_seh(i8 0, i8* %1)
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ret void
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ehcleanup: ; preds = %entry
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%2 = cleanuppad within none []
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%3 = call i8* @llvm.localaddress()
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call void @fin_simple_seh(i8 1, i8* %3) [ "funclet"(token %2) ]
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cleanupret from %2 unwind to caller
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}
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define void @fin_simple_seh(i8 %abnormal_termination, i8* %frame_pointer) {
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entry:
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; CHECK-LABEL: fin_simple_seh
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; CHECK: movz x8, #:abs_g1_s:.Lsimple_seh$frame_escape_0
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; CHECK: movk x8, #:abs_g0_nc:.Lsimple_seh$frame_escape_0
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; CHECK: strb w0, [sp, #15]
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; CHECK: ldr w0, [x1, x8]
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; CHECK: bl foo
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%frame_pointer.addr = alloca i8*, align 8
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%abnormal_termination.addr = alloca i8, align 1
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%0 = call i8* @llvm.localrecover(i8* bitcast (void ()* @simple_seh to i8*), i8* %frame_pointer, i32 0)
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%o = bitcast i8* %0 to %struct.S*
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store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
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store i8 %abnormal_termination, i8* %abnormal_termination.addr, align 1
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%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
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%1 = load i32, i32* %x, align 4
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call void @foo(i32 %1)
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ret void
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}
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; Test SEH when stack realignment is needed in case highly aligned stack objects are present.
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define void @stack_realign() #0 personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
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entry:
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; CHECK-LABEL: stack_realign
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; CHECK: add x29, sp, #16
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; CHECK: sub x9, sp, #64
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; CHECK: and sp, x9, #0xffffffffffffffe0
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; CHECK: mov x19, sp
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; CHECK: orr x1, xzr, #0xfffffffffffffffe
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; CHECK: stur x1, [x19, #16]
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; CHECK: .set .Lstack_realign$frame_escape_0, 32
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; CHECK: ldr w0, [x19, #32]
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; CHECK: bl foo
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%o = alloca %struct.S, align 32
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call void (...) @llvm.localescape(%struct.S* %o)
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%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
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%0 = load i32, i32* %x, align 32
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invoke void @foo(i32 %0) #5
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to label %invoke.cont unwind label %ehcleanup
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invoke.cont: ; preds = %entry
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%1 = call i8* @llvm.localaddress()
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call void @fin_stack_realign(i8 0, i8* %1)
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ret void
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ehcleanup: ; preds = %entry
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%2 = cleanuppad within none []
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%3 = call i8* @llvm.localaddress()
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call void @fin_stack_realign(i8 1, i8* %3) [ "funclet"(token %2) ]
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cleanupret from %2 unwind to caller
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}
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define void @fin_stack_realign(i8 %abnormal_termination, i8* %frame_pointer) {
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entry:
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; CHECK-LABEL: fin_stack_realign
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; CHECK: movz x8, #:abs_g1_s:.Lstack_realign$frame_escape_0
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; CHECK: movk x8, #:abs_g0_nc:.Lstack_realign$frame_escape_0
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; CHECK: strb w0, [sp, #15]
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; CHECK: ldr w0, [x1, x8]
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; CHECK: bl foo
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%frame_pointer.addr = alloca i8*, align 8
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%abnormal_termination.addr = alloca i8, align 1
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%0 = call i8* @llvm.localrecover(i8* bitcast (void ()* @stack_realign to i8*), i8* %frame_pointer, i32 0)
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%o = bitcast i8* %0 to %struct.S*
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store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
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store i8 %abnormal_termination, i8* %abnormal_termination.addr, align 1
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%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
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%1 = load i32, i32* %x, align 32
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call void @foo(i32 %1)
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ret void
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}
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; Test SEH when variable size objects are present on the stack. Note: Escaped vla's are current not supported by SEH.
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define void @vla_present(i32 %n) #0 personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
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entry:
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; CHECK-LABEL: vla_present
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; CHECK: add x29, sp, #32
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; CHECK: orr x1, xzr, #0xfffffffffffffffe
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; CHECK: stur x1, [x29, #-32]
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; CHECK: .set .Lvla_present$frame_escape_0, -4
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; CHECK: stur w0, [x29, #-4]
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; CHECK: ldur w8, [x29, #-4]
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; CHECK: mov x9, sp
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; CHECK: stur x9, [x29, #-16]
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; CHECK: stur x8, [x29, #-24]
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; CHECK: ldur w0, [x29, #-4]
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; CHECK: bl foo
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%n.addr = alloca i32, align 4
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%saved_stack = alloca i8*, align 8
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%__vla_expr0 = alloca i64, align 8
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call void (...) @llvm.localescape(i32* %n.addr)
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store i32 %n, i32* %n.addr, align 4
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%0 = load i32, i32* %n.addr, align 4
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%1 = zext i32 %0 to i64
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%2 = call i8* @llvm.stacksave()
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store i8* %2, i8** %saved_stack, align 8
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%vla = alloca i32, i64 %1, align 4
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store i64 %1, i64* %__vla_expr0, align 8
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%3 = load i32, i32* %n.addr, align 4
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invoke void @foo(i32 %3) #5
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to label %invoke.cont unwind label %ehcleanup
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invoke.cont: ; preds = %entry
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%4 = call i8* @llvm.localaddress()
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call void @fin_vla_present(i8 0, i8* %4)
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%5 = load i8*, i8** %saved_stack, align 8
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call void @llvm.stackrestore(i8* %5)
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ret void
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ehcleanup: ; preds = %entry
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%6 = cleanuppad within none []
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%7 = call i8* @llvm.localaddress()
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call void @fin_vla_present(i8 1, i8* %7) [ "funclet"(token %6) ]
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cleanupret from %6 unwind to caller
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}
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define void @fin_vla_present(i8 %abnormal_termination, i8* %frame_pointer) {
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entry:
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; CHECK-LABEL: fin_vla_present
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; CHECK: movz x8, #:abs_g1_s:.Lvla_present$frame_escape_0
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; CHECK: movk x8, #:abs_g0_nc:.Lvla_present$frame_escape_0
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; CHECK: strb w0, [sp, #15]
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; CHECK: ldr w0, [x1, x8]
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; CHECK: bl foo
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%frame_pointer.addr = alloca i8*, align 8
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%abnormal_termination.addr = alloca i8, align 1
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%0 = call i8* @llvm.localrecover(i8* bitcast (void (i32)* @vla_present to i8*), i8* %frame_pointer, i32 0)
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%n.addr = bitcast i8* %0 to i32*
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store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
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store i8 %abnormal_termination, i8* %abnormal_termination.addr, align 1
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%1 = load i32, i32* %n.addr, align 4
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call void @foo(i32 %1)
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ret void
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}
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; Test when both vla's and highly aligned objects are present on stack.
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define void @vla_and_realign(i32 %n) #0 personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*) {
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entry:
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; CHECK-LABEL: vla_and_realign
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; CHECK: add x29, sp, #16
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; CHECK: sub x9, sp, #64
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; CHECK: and sp, x9, #0xffffffffffffffe0
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; CHECK: mov x19, sp
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; CHECK: orr x1, xzr, #0xfffffffffffffffe
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; CHECK: stur x1, [x19]
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; CHECK: .set .Lvla_and_realign$frame_escape_0, 32
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; CHECK: stur w0, [x29, #-4]
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; CHECK: ldur w8, [x29, #-4]
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; CHECK: mov x9, sp
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; CHECK: str x9, [x19, #24]
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; CHECK: str x8, [x19, #16]
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; CHECK: ldr w0, [x19, #32]
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; CHECK: bl foo
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%n.addr = alloca i32, align 4
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%o = alloca %struct.S, align 32
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%saved_stack = alloca i8*, align 8
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%__vla_expr0 = alloca i64, align 8
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call void (...) @llvm.localescape(%struct.S* %o)
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store i32 %n, i32* %n.addr, align 4
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%0 = load i32, i32* %n.addr, align 4
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%1 = zext i32 %0 to i64
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%2 = call i8* @llvm.stacksave()
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store i8* %2, i8** %saved_stack, align 8
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%vla = alloca i32, i64 %1, align 4
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store i64 %1, i64* %__vla_expr0, align 8
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%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
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%3 = load i32, i32* %x, align 32
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invoke void @foo(i32 %3) #5
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to label %invoke.cont unwind label %ehcleanup
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invoke.cont: ; preds = %entry
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%4 = call i8* @llvm.localaddress()
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call void @fin_vla_and_realign(i8 0, i8* %4)
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%5 = load i8*, i8** %saved_stack, align 8
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call void @llvm.stackrestore(i8* %5)
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ret void
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ehcleanup: ; preds = %entry
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%6 = cleanuppad within none []
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%7 = call i8* @llvm.localaddress()
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call void @fin_vla_and_realign(i8 1, i8* %7) [ "funclet"(token %6) ]
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cleanupret from %6 unwind to caller
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}
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define void @fin_vla_and_realign(i8 %abnormal_termination, i8* %frame_pointer) {
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entry:
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; CHECK-LABEL: fin_vla_and_realign
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; CHECK: movz x8, #:abs_g1_s:.Lvla_and_realign$frame_escape_0
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; CHECK: movk x8, #:abs_g0_nc:.Lvla_and_realign$frame_escape_0
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; CHECK: strb w0, [sp, #15]
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; CHECK: ldr w0, [x1, x8]
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; CHECK: bl foo
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%frame_pointer.addr = alloca i8*, align 8
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%abnormal_termination.addr = alloca i8, align 1
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%0 = call i8* @llvm.localrecover(i8* bitcast (void (i32)* @vla_and_realign to i8*), i8* %frame_pointer, i32 0)
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%o = bitcast i8* %0 to %struct.S*
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store i8* %frame_pointer, i8** %frame_pointer.addr, align 8
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store i8 %abnormal_termination, i8* %abnormal_termination.addr, align 1
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%x = getelementptr inbounds %struct.S, %struct.S* %o, i32 0, i32 0
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%1 = load i32, i32* %x, align 32
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call void @foo(i32 %1)
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ret void
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}
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declare void @foo(i32)
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declare void @llvm.stackrestore(i8*)
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declare i8* @llvm.stacksave()
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declare i8* @llvm.localrecover(i8*, i8*, i32)
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declare i8* @llvm.localaddress()
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declare void @llvm.localescape(...)
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declare i32 @__C_specific_handler(...)
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attributes #0 = { noinline optnone }
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