| ; RUN: llc < %s -frame-pointer=all -mcpu=cortex-a8 -mtriple arm-linux-gnu -target-abi=apcs -o - | FileCheck %s |
| ; This test is fairly fragile. The goal is to ensure that "large" stack |
| ; objects are allocated closest to the stack protector (i.e., farthest away |
| ; from the Stack Pointer.) In standard SSP mode this means that large (>= |
| ; ssp-buffer-size) arrays and structures containing such arrays are |
| ; closet to the protector. With sspstrong and sspreq this means large |
| ; arrays/structures-with-arrays are closest, followed by small (< ssp-buffer-size) |
| ; arrays/structures-with-arrays, and then addr-taken variables. |
| ; |
| ; Ideally, we only want verify that the objects appear in the correct groups |
| ; and that the groups have the correct relative stack offset. The ordering |
| ; within a group is not relevant to this test. Unfortunately, there is not |
| ; an elegant way to do this, so just match the offset for each object. |
| |
| %struct.struct_large_char = type { [8 x i8] } |
| %struct.struct_large_char2 = type { [2 x i8], [8 x i8] } |
| %struct.struct_small_char = type { [2 x i8] } |
| %struct.struct_large_nonchar = type { [8 x i32] } |
| %struct.struct_small_nonchar = type { [2 x i16] } |
| |
| define void @layout_ssp() ssp { |
| entry: |
| ; Expected stack layout for ssp is |
| ; 180 large_char . Group 1, nested arrays, arrays >= ssp-buffer-size |
| ; 172 struct_large_char . |
| ; 168 scalar1 | Everything else |
| ; 164 scalar2 |
| ; 160 scalar3 |
| ; 156 addr-of |
| ; 152 small_nonchar |
| ; 112 large_nonchar |
| ; 110 small_char |
| ; 108 struct_small_char |
| ; 72 struct_large_nonchar |
| ; 68 struct_small_nonchar |
| |
| ; CHECK: layout_ssp: |
| |
| ; CHECK: bl get_scalar1 |
| ; CHECK: str r0, [sp, #168] |
| ; CHECK: bl end_scalar1 |
| |
| ; CHECK: bl get_scalar2 |
| ; CHECK: str r0, [sp, #164] |
| ; CHECK: bl end_scalar |
| |
| ; CHECK: bl get_scalar3 |
| ; CHECK: str r0, [sp, #160] |
| ; CHECK: bl end_scalar3 |
| |
| ; CHECK: bl get_addrof |
| ; CHECK: str r0, [sp, #156] |
| ; CHECK: bl end_addrof |
| |
| ; CHECK: get_small_nonchar |
| ; CHECK: strh r0, [sp, #152] |
| ; CHECK: bl end_small_nonchar |
| |
| ; CHECK: bl get_large_nonchar |
| ; CHECK: str r0, [sp, #112] |
| ; CHECK: bl end_large_nonchar |
| |
| ; CHECK: bl get_small_char |
| ; CHECK: strb r0, [sp, #110] |
| ; CHECK: bl end_small_char |
| |
| ; CHECK: bl get_large_char |
| ; CHECK: strb r0, [sp, #180] |
| ; CHECK: bl end_large_char |
| |
| ; CHECK: bl get_struct_large_char |
| ; CHECK: strb r0, [sp, #172] |
| ; CHECK: bl end_struct_large_char |
| |
| ; CHECK: bl get_struct_small_char |
| ; CHECK: strb r0, [sp, #108] |
| ; CHECK: bl end_struct_small_char |
| |
| ; CHECK: bl get_struct_large_nonchar |
| ; CHECK:str r0, [sp, #72] |
| ; CHECK: bl end_struct_large_nonchar |
| |
| ; CHECK: bl get_struct_small_nonchar |
| ; CHECK: strh r0, [sp, #68] |
| ; CHECK: bl end_struct_small_nonchar |
| %x = alloca i32, align 4 |
| %y = alloca i32, align 4 |
| %z = alloca i32, align 4 |
| %ptr = alloca i32, align 4 |
| %small2 = alloca [2 x i16], align 2 |
| %large2 = alloca [8 x i32], align 16 |
| %small = alloca [2 x i8], align 1 |
| %large = alloca [8 x i8], align 1 |
| %a = alloca %struct.struct_large_char, align 1 |
| %b = alloca %struct.struct_small_char, align 1 |
| %c = alloca %struct.struct_large_nonchar, align 8 |
| %d = alloca %struct.struct_small_nonchar, align 2 |
| %call = call i32 @get_scalar1() |
| store i32 %call, ptr %x, align 4 |
| call void @end_scalar1() |
| %call1 = call i32 @get_scalar2() |
| store i32 %call1, ptr %y, align 4 |
| call void @end_scalar2() |
| %call2 = call i32 @get_scalar3() |
| store i32 %call2, ptr %z, align 4 |
| call void @end_scalar3() |
| %call3 = call i32 @get_addrof() |
| store i32 %call3, ptr %ptr, align 4 |
| call void @end_addrof() |
| %call4 = call signext i16 @get_small_nonchar() |
| store i16 %call4, ptr %small2, align 2 |
| call void @end_small_nonchar() |
| %call5 = call i32 @get_large_nonchar() |
| store i32 %call5, ptr %large2, align 4 |
| call void @end_large_nonchar() |
| %call7 = call signext i8 @get_small_char() |
| store i8 %call7, ptr %small, align 1 |
| call void @end_small_char() |
| %call9 = call signext i8 @get_large_char() |
| store i8 %call9, ptr %large, align 1 |
| call void @end_large_char() |
| %call11 = call signext i8 @get_struct_large_char() |
| store i8 %call11, ptr %a, align 1 |
| call void @end_struct_large_char() |
| %call13 = call signext i8 @get_struct_small_char() |
| store i8 %call13, ptr %b, align 1 |
| call void @end_struct_small_char() |
| %call16 = call i32 @get_struct_large_nonchar() |
| store i32 %call16, ptr %c, align 4 |
| call void @end_struct_large_nonchar() |
| %call19 = call signext i16 @get_struct_small_nonchar() |
| store i16 %call19, ptr %d, align 2 |
| call void @end_struct_small_nonchar() |
| %0 = load i32, ptr %x, align 4 |
| %1 = load i32, ptr %y, align 4 |
| %2 = load i32, ptr %z, align 4 |
| %3 = load i64, ptr %a, align 1 |
| %4 = load i16, ptr %b, align 1 |
| %5 = load i32, ptr %d, align 1 |
| call void @takes_all(i64 %3, i16 %4, ptr byval(%struct.struct_large_nonchar) align 4 %c, i32 %5, ptr %large, ptr %small, ptr %large2, ptr %small2, ptr %ptr, i32 %0, i32 %1, i32 %2) |
| ret void |
| } |
| |
| define void @layout_sspstrong() sspstrong { |
| entry: |
| ; Expected stack layout for sspstrong is |
| ; 144 large_nonchar . Group 1, nested arrays, |
| ; 136 large_char . arrays >= ssp-buffer-size |
| ; 128 struct_large_char . |
| ; 96 struct_large_nonchar . |
| ; 84+8 small_non_char | Group 2, nested arrays, |
| ; 90 small_char | arrays < ssp-buffer-size |
| ; 88 struct_small_char | |
| ; 84 struct_small_nonchar | |
| ; 80 addrof * Group 3, addr-of local |
| ; 76 scalar1 + Group 4, everything else |
| ; 72 scalar2 + |
| ; 68 scalar3 + |
| ; |
| ; CHECK: layout_sspstrong: |
| |
| ; CHECK: bl get_scalar1 |
| ; CHECK: str r0, [sp, #76] |
| ; CHECK: bl end_scalar1 |
| |
| ; CHECK: bl get_scalar2 |
| ; CHECK: str r0, [sp, #72] |
| ; CHECK: bl end_scalar2 |
| |
| ; CHECK: bl get_scalar3 |
| ; CHECK: str r0, [sp, #68] |
| ; CHECK: bl end_scalar3 |
| |
| ; CHECK: bl get_addrof |
| ; CHECK: str r0, [sp, #80] |
| ; CHECK: bl end_addrof |
| |
| ; CHECK: get_small_nonchar |
| ; CHECK: strh r0, [sp, #92] |
| ; CHECK: bl end_small_nonchar |
| |
| ; CHECK: bl get_large_nonchar |
| ; CHECK: str r0, [sp, #144] |
| ; CHECK: bl end_large_nonchar |
| |
| ; CHECK: bl get_small_char |
| ; CHECK: strb r0, [sp, #90] |
| ; CHECK: bl end_small_char |
| |
| ; CHECK: bl get_large_char |
| ; CHECK: strb r0, [sp, #136] |
| ; CHECK: bl end_large_char |
| |
| ; CHECK: bl get_struct_large_char |
| ; CHECK: strb r0, [sp, #128] |
| ; CHECK: bl end_struct_large_char |
| |
| ; CHECK: bl get_struct_small_char |
| ; CHECK: strb r0, [sp, #88] |
| ; CHECK: bl end_struct_small_char |
| |
| ; CHECK: bl get_struct_large_nonchar |
| ; CHECK: str r0, [sp, #96] |
| ; CHECK: bl end_struct_large_nonchar |
| |
| ; CHECK: bl get_struct_small_nonchar |
| ; CHECK: strh r0, [sp, #84] |
| ; CHECK: bl end_struct_small_nonchar |
| %x = alloca i32, align 4 |
| %y = alloca i32, align 4 |
| %z = alloca i32, align 4 |
| %ptr = alloca i32, align 4 |
| %small2 = alloca [2 x i16], align 2 |
| %large2 = alloca [8 x i32], align 16 |
| %small = alloca [2 x i8], align 1 |
| %large = alloca [8 x i8], align 1 |
| %a = alloca %struct.struct_large_char, align 1 |
| %b = alloca %struct.struct_small_char, align 1 |
| %c = alloca %struct.struct_large_nonchar, align 8 |
| %d = alloca %struct.struct_small_nonchar, align 2 |
| %call = call i32 @get_scalar1() |
| store i32 %call, ptr %x, align 4 |
| call void @end_scalar1() |
| %call1 = call i32 @get_scalar2() |
| store i32 %call1, ptr %y, align 4 |
| call void @end_scalar2() |
| %call2 = call i32 @get_scalar3() |
| store i32 %call2, ptr %z, align 4 |
| call void @end_scalar3() |
| %call3 = call i32 @get_addrof() |
| store i32 %call3, ptr %ptr, align 4 |
| call void @end_addrof() |
| %call4 = call signext i16 @get_small_nonchar() |
| store i16 %call4, ptr %small2, align 2 |
| call void @end_small_nonchar() |
| %call5 = call i32 @get_large_nonchar() |
| store i32 %call5, ptr %large2, align 4 |
| call void @end_large_nonchar() |
| %call7 = call signext i8 @get_small_char() |
| store i8 %call7, ptr %small, align 1 |
| call void @end_small_char() |
| %call9 = call signext i8 @get_large_char() |
| store i8 %call9, ptr %large, align 1 |
| call void @end_large_char() |
| %call11 = call signext i8 @get_struct_large_char() |
| store i8 %call11, ptr %a, align 1 |
| call void @end_struct_large_char() |
| %call13 = call signext i8 @get_struct_small_char() |
| store i8 %call13, ptr %b, align 1 |
| call void @end_struct_small_char() |
| %call16 = call i32 @get_struct_large_nonchar() |
| store i32 %call16, ptr %c, align 4 |
| call void @end_struct_large_nonchar() |
| %call19 = call signext i16 @get_struct_small_nonchar() |
| store i16 %call19, ptr %d, align 2 |
| call void @end_struct_small_nonchar() |
| %0 = load i32, ptr %x, align 4 |
| %1 = load i32, ptr %y, align 4 |
| %2 = load i32, ptr %z, align 4 |
| %3 = load i64, ptr %a, align 1 |
| %4 = load i16, ptr %b, align 1 |
| %5 = load i32, ptr %d, align 1 |
| call void @takes_all(i64 %3, i16 %4, ptr byval(%struct.struct_large_nonchar) align 4 %c, i32 %5, ptr %large, ptr %small, ptr %large2, ptr %small2, ptr %ptr, i32 %0, i32 %1, i32 %2) |
| ret void |
| } |
| |
| define void @layout_sspreq() sspreq { |
| entry: |
| ; Expected stack layout for sspreq is the same as sspstrong |
| ; |
| ; CHECK: layout_sspreq: |
| |
| ; CHECK: bl get_scalar1 |
| ; CHECK: str r0, [sp, #76] |
| ; CHECK: bl end_scalar1 |
| |
| ; CHECK: bl get_scalar2 |
| ; CHECK: str r0, [sp, #72] |
| ; CHECK: bl end_scalar2 |
| |
| ; CHECK: bl get_scalar3 |
| ; CHECK: str r0, [sp, #68] |
| ; CHECK: bl end_scalar3 |
| |
| ; CHECK: bl get_addrof |
| ; CHECK: str r0, [sp, #80] |
| ; CHECK: bl end_addrof |
| |
| ; CHECK: get_small_nonchar |
| ; CHECK: strh r0, [sp, #92] |
| ; CHECK: bl end_small_nonchar |
| |
| ; CHECK: bl get_large_nonchar |
| ; CHECK: str r0, [sp, #144] |
| ; CHECK: bl end_large_nonchar |
| |
| ; CHECK: bl get_small_char |
| ; CHECK: strb r0, [sp, #90] |
| ; CHECK: bl end_small_char |
| |
| ; CHECK: bl get_large_char |
| ; CHECK: strb r0, [sp, #136] |
| ; CHECK: bl end_large_char |
| |
| ; CHECK: bl get_struct_large_char |
| ; CHECK: strb r0, [sp, #128] |
| ; CHECK: bl end_struct_large_char |
| |
| ; CHECK: bl get_struct_small_char |
| ; CHECK: strb r0, [sp, #88] |
| ; CHECK: bl end_struct_small_char |
| |
| ; CHECK: bl get_struct_large_nonchar |
| ; CHECK: str r0, [sp, #96] |
| ; CHECK: bl end_struct_large_nonchar |
| |
| ; CHECK: bl get_struct_small_nonchar |
| ; CHECK: strh r0, [sp, #84] |
| ; CHECK: bl end_struct_small_nonchar |
| %x = alloca i32, align 4 |
| %y = alloca i32, align 4 |
| %z = alloca i32, align 4 |
| %ptr = alloca i32, align 4 |
| %small2 = alloca [2 x i16], align 2 |
| %large2 = alloca [8 x i32], align 16 |
| %small = alloca [2 x i8], align 1 |
| %large = alloca [8 x i8], align 1 |
| %a = alloca %struct.struct_large_char, align 1 |
| %b = alloca %struct.struct_small_char, align 1 |
| %c = alloca %struct.struct_large_nonchar, align 8 |
| %d = alloca %struct.struct_small_nonchar, align 2 |
| %call = call i32 @get_scalar1() |
| store i32 %call, ptr %x, align 4 |
| call void @end_scalar1() |
| %call1 = call i32 @get_scalar2() |
| store i32 %call1, ptr %y, align 4 |
| call void @end_scalar2() |
| %call2 = call i32 @get_scalar3() |
| store i32 %call2, ptr %z, align 4 |
| call void @end_scalar3() |
| %call3 = call i32 @get_addrof() |
| store i32 %call3, ptr %ptr, align 4 |
| call void @end_addrof() |
| %call4 = call signext i16 @get_small_nonchar() |
| store i16 %call4, ptr %small2, align 2 |
| call void @end_small_nonchar() |
| %call5 = call i32 @get_large_nonchar() |
| store i32 %call5, ptr %large2, align 4 |
| call void @end_large_nonchar() |
| %call7 = call signext i8 @get_small_char() |
| store i8 %call7, ptr %small, align 1 |
| call void @end_small_char() |
| %call9 = call signext i8 @get_large_char() |
| store i8 %call9, ptr %large, align 1 |
| call void @end_large_char() |
| %call11 = call signext i8 @get_struct_large_char() |
| store i8 %call11, ptr %a, align 1 |
| call void @end_struct_large_char() |
| %call13 = call signext i8 @get_struct_small_char() |
| store i8 %call13, ptr %b, align 1 |
| call void @end_struct_small_char() |
| %call16 = call i32 @get_struct_large_nonchar() |
| store i32 %call16, ptr %c, align 4 |
| call void @end_struct_large_nonchar() |
| %call19 = call signext i16 @get_struct_small_nonchar() |
| store i16 %call19, ptr %d, align 2 |
| call void @end_struct_small_nonchar() |
| %0 = load i32, ptr %x, align 4 |
| %1 = load i32, ptr %y, align 4 |
| %2 = load i32, ptr %z, align 4 |
| %3 = load i64, ptr %a, align 1 |
| %4 = load i16, ptr %b, align 1 |
| %5 = load i32, ptr %d, align 1 |
| call void @takes_all(i64 %3, i16 %4, ptr byval(%struct.struct_large_nonchar) align 4 %c, i32 %5, ptr %large, ptr %small, ptr %large2, ptr %small2, ptr %ptr, i32 %0, i32 %1, i32 %2) |
| ret void |
| } |
| |
| define void @struct_with_protectable_arrays() sspstrong { |
| entry: |
| ; Check to ensure that a structure which contains a small array followed by a |
| ; large array is assigned to the stack properly as a large object. |
| ; CHECK: struct_with_protectable_arrays: |
| ; CHECK: bl get_struct_small_char |
| ; CHECK: strb r0, [sp, #68] |
| ; CHECK: bl end_struct_small_char |
| ; CHECK: bl get_struct_large_char2 |
| ; CHECK: strb r0, [sp, #106] |
| ; CHECK: bl end_struct_large_char2 |
| %a = alloca %struct.struct_small_char, align 1 |
| %b = alloca %struct.struct_large_char2, align 1 |
| %d1 = alloca %struct.struct_large_nonchar, align 8 |
| %d2 = alloca %struct.struct_small_nonchar, align 2 |
| %call = call signext i8 @get_struct_small_char() |
| store i8 %call, ptr %a, align 1 |
| call void @end_struct_small_char() |
| %call1 = call signext i8 @get_struct_large_char2() |
| %foo2 = getelementptr inbounds %struct.struct_large_char2, ptr %b, i32 0, i32 1 |
| store i8 %call1, ptr %foo2, align 1 |
| call void @end_struct_large_char2() |
| %0 = load i64, ptr %b, align 1 |
| %1 = load i16, ptr %a, align 1 |
| %2 = load i32, ptr %d2, align 1 |
| call void @takes_all(i64 %0, i16 %1, ptr byval(%struct.struct_large_nonchar) align 4 %d1, i32 %2, ptr null, ptr null, ptr null, ptr null, ptr null, i32 0, i32 0, i32 0) |
| ret void |
| } |
| |
| declare i32 @get_scalar1() |
| declare void @end_scalar1() |
| |
| declare i32 @get_scalar2() |
| declare void @end_scalar2() |
| |
| declare i32 @get_scalar3() |
| declare void @end_scalar3() |
| |
| declare i32 @get_addrof() |
| declare void @end_addrof() |
| |
| declare signext i16 @get_small_nonchar() |
| declare void @end_small_nonchar() |
| |
| declare i32 @get_large_nonchar() |
| declare void @end_large_nonchar() |
| |
| declare signext i8 @get_small_char() |
| declare void @end_small_char() |
| |
| declare signext i8 @get_large_char() |
| declare void @end_large_char() |
| |
| declare signext i8 @get_struct_large_char() |
| declare void @end_struct_large_char() |
| |
| declare signext i8 @get_struct_large_char2() |
| declare void @end_struct_large_char2() |
| |
| declare signext i8 @get_struct_small_char() |
| declare void @end_struct_small_char() |
| |
| declare i32 @get_struct_large_nonchar() |
| declare void @end_struct_large_nonchar() |
| |
| declare signext i16 @get_struct_small_nonchar() |
| declare void @end_struct_small_nonchar() |
| |
| declare void @takes_all(i64, i16, ptr byval(%struct.struct_large_nonchar) align 8, i32, ptr, ptr, ptr, ptr, ptr, i32, i32, i32) |
