1 ; RUN: llc -mtriple=i386-pc-windows-msvc < %s -o - | FileCheck -check-prefix=MSVC-X86 %s
2 ; RUN: llc -mtriple=x86_64-pc-windows-msvc < %s -o - | FileCheck -check-prefix=MSVC-X64 %s
4 ; Make sure fastisel falls back and does something secure.
5 ; RUN: llc -mtriple=i686-pc-windows-msvc -O0 < %s -o - | FileCheck -check-prefix=MSVC-X86-O0 %s
6 ; RUN: llc -mtriple=x86_64-pc-windows-msvc -O0 < %s -o - | FileCheck -check-prefix=MSVC-X64-O0 %s
8 @"\01LC" = internal constant [11 x i8] c"buf == %s\0A\00" ; <[11 x i8]*> [#uses=1]
10 define void @test(i8* %a) nounwind ssp {
12 %a_addr = alloca i8* ; <i8**> [#uses=2]
13 %buf = alloca [8 x i8] ; <[8 x i8]*> [#uses=2]
14 store i8* %a, i8** %a_addr
15 %buf1 = bitcast [8 x i8]* %buf to i8* ; <i8*> [#uses=1]
16 %0 = load i8*, i8** %a_addr, align 4 ; <i8*> [#uses=1]
17 %1 = call i8* @strcpy(i8* %buf1, i8* %0) nounwind ; <i8*> [#uses=0]
18 %buf2 = bitcast [8 x i8]* %buf to i8* ; <i8*> [#uses=1]
19 %2 = call i32 (i8*, ...) @printf(i8* getelementptr ([11 x i8], [11 x i8]* @"\01LC", i32 0, i32 0), i8* %buf2) nounwind ; <i32> [#uses=0]
22 return: ; preds = %entry
26 ; MSVC-X86-LABEL: _test:
27 ; MSVC-X86: movl ___security_cookie, %[[REG1:[^ ]*]]
28 ; MSVC-X86: xorl %esp, %[[REG1]]
29 ; MSVC-X86: movl %[[REG1]], [[SLOT:[0-9]*]](%esp)
30 ; MSVC-X86: calll _strcpy
31 ; MSVC-X86: movl [[SLOT]](%esp), %ecx
32 ; MSVC-X86: xorl %esp, %ecx
33 ; MSVC-X86: calll @__security_check_cookie@4
36 ; MSVC-X64-LABEL: test:
37 ; MSVC-X64: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
38 ; MSVC-X64: xorq %rsp, %[[REG1]]
39 ; MSVC-X64: movq %[[REG1]], [[SLOT:[0-9]*]](%rsp)
40 ; MSVC-X64: callq strcpy
41 ; MSVC-X64: movq [[SLOT]](%rsp), %rcx
42 ; MSVC-X64: xorq %rsp, %rcx
43 ; MSVC-X64: callq __security_check_cookie
46 ; MSVC-X86-O0-LABEL: _test:
47 ; MSVC-X86-O0: movl ___security_cookie, %[[REG1:[^ ]*]]
48 ; MSVC-X86-O0: xorl %esp, %[[REG1]]
49 ; MSVC-X86-O0: movl %[[REG1]], [[SLOT:[0-9]*]](%esp)
50 ; MSVC-X86-O0: calll _strcpy
51 ; MSVC-X86-O0: movl [[SLOT]](%esp), %ecx
52 ; MSVC-X86-O0: xorl %esp, %ecx
53 ; MSVC-X86-O0: calll @__security_check_cookie@4
56 ; MSVC-X64-O0-LABEL: test:
57 ; MSVC-X64-O0: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
58 ; MSVC-X64-O0: xorq %rsp, %[[REG1]]
59 ; MSVC-X64-O0: movq %[[REG1]], [[SLOT:[0-9]*]](%rsp)
60 ; MSVC-X64-O0: callq strcpy
61 ; MSVC-X64-O0: movq [[SLOT]](%rsp), %rcx
62 ; MSVC-X64-O0: xorq %rsp, %rcx
63 ; MSVC-X64-O0: callq __security_check_cookie
67 declare void @escape(i32*)
69 define void @test_vla(i32 %n) nounwind ssp {
70 %vla = alloca i32, i32 %n
71 call void @escape(i32* %vla)
75 ; MSVC-X86-LABEL: _test_vla:
76 ; MSVC-X86: pushl %ebp
77 ; MSVC-X86: movl %esp, %ebp
78 ; MSVC-X86: movl ___security_cookie, %[[REG1:[^ ]*]]
79 ; MSVC-X86: xorl %ebp, %[[REG1]]
80 ; MSVC-X86: movl %[[REG1]], [[SLOT:-[0-9]*]](%ebp)
81 ; MSVC-X86: calll __chkstk
83 ; MSVC-X86: calll _escape
84 ; MSVC-X86: movl [[SLOT]](%ebp), %ecx
85 ; MSVC-X86: xorl %ebp, %ecx
86 ; MSVC-X86: calll @__security_check_cookie@4
87 ; MSVC-X86: movl %ebp, %esp
91 ; MSVC-X64-LABEL: test_vla:
92 ; MSVC-X64: pushq %rbp
93 ; MSVC-X64: subq $16, %rsp
94 ; MSVC-X64: leaq 16(%rsp), %rbp
95 ; MSVC-X64: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
96 ; MSVC-X64: xorq %rbp, %[[REG1]]
97 ; MSVC-X64: movq %[[REG1]], [[SLOT:-[0-9]*]](%rbp)
98 ; MSVC-X64: callq __chkstk
99 ; MSVC-X64: callq escape
100 ; MSVC-X64: movq [[SLOT]](%rbp), %rcx
101 ; MSVC-X64: xorq %rbp, %rcx
102 ; MSVC-X64: callq __security_check_cookie
106 ; This case is interesting because we address local variables with RBX but XOR
107 ; the guard value with RBP. That's fine, either value will do, as long as they
108 ; are the same across the life of the frame.
110 define void @test_vla_realign(i32 %n) nounwind ssp {
111 %realign = alloca i32, align 32
112 %vla = alloca i32, i32 %n
113 call void @escape(i32* %realign)
114 call void @escape(i32* %vla)
118 ; MSVC-X86-LABEL: _test_vla_realign:
119 ; MSVC-X86: pushl %ebp
120 ; MSVC-X86: movl %esp, %ebp
121 ; MSVC-X86: pushl %esi
122 ; MSVC-X86: andl $-32, %esp
123 ; MSVC-X86: subl $32, %esp
124 ; MSVC-X86: movl %esp, %esi
125 ; MSVC-X86: movl ___security_cookie, %[[REG1:[^ ]*]]
126 ; MSVC-X86: xorl %ebp, %[[REG1]]
127 ; MSVC-X86: movl %[[REG1]], [[SLOT:[0-9]*]](%esi)
128 ; MSVC-X86: calll __chkstk
130 ; MSVC-X86: calll _escape
131 ; MSVC-X86: movl [[SLOT]](%esi), %ecx
132 ; MSVC-X86: xorl %ebp, %ecx
133 ; MSVC-X86: calll @__security_check_cookie@4
134 ; MSVC-X86: leal -8(%ebp), %esp
135 ; MSVC-X86: popl %esi
136 ; MSVC-X86: popl %ebp
139 ; MSVC-X64-LABEL: test_vla_realign:
140 ; MSVC-X64: pushq %rbp
141 ; MSVC-X64: pushq %rbx
142 ; MSVC-X64: subq $32, %rsp
143 ; MSVC-X64: leaq 32(%rsp), %rbp
144 ; MSVC-X64: andq $-32, %rsp
145 ; MSVC-X64: movq %rsp, %rbx
146 ; MSVC-X64: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
147 ; MSVC-X64: xorq %rbp, %[[REG1]]
148 ; MSVC-X64: movq %[[REG1]], [[SLOT:[0-9]*]](%rbx)
149 ; MSVC-X64: callq __chkstk
150 ; MSVC-X64: callq escape
151 ; MSVC-X64: movq [[SLOT]](%rbx), %rcx
152 ; MSVC-X64: xorq %rbp, %rcx
153 ; MSVC-X64: callq __security_check_cookie
157 declare i8* @strcpy(i8*, i8*) nounwind
159 declare i32 @printf(i8*, ...) nounwind