161 lines
5.0 KiB
LLVM
161 lines
5.0 KiB
LLVM
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; RUN: llc -mtriple=i386-pc-windows-msvc < %s -o - | FileCheck -check-prefix=MSVC-X86 %s
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; RUN: llc -mtriple=x86_64-pc-windows-msvc < %s -o - | FileCheck -check-prefix=MSVC-X64 %s
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; Make sure fastisel falls back and does something secure.
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; RUN: llc -mtriple=i686-pc-windows-msvc -O0 < %s -o - | FileCheck -check-prefix=MSVC-X86-O0 %s
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; RUN: llc -mtriple=x86_64-pc-windows-msvc -O0 < %s -o - | FileCheck -check-prefix=MSVC-X64-O0 %s
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@"\01LC" = internal constant [11 x i8] c"buf == %s\0A\00" ; <[11 x i8]*> [#uses=1]
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define void @test(i8* %a) nounwind ssp {
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entry:
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%a_addr = alloca i8* ; <i8**> [#uses=2]
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%buf = alloca [8 x i8] ; <[8 x i8]*> [#uses=2]
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store i8* %a, i8** %a_addr
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%buf1 = bitcast [8 x i8]* %buf to i8* ; <i8*> [#uses=1]
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%0 = load i8*, i8** %a_addr, align 4 ; <i8*> [#uses=1]
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%1 = call i8* @strcpy(i8* %buf1, i8* %0) nounwind ; <i8*> [#uses=0]
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%buf2 = bitcast [8 x i8]* %buf to i8* ; <i8*> [#uses=1]
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%2 = call i32 (i8*, ...) @printf(i8* getelementptr ([11 x i8], [11 x i8]* @"\01LC", i32 0, i32 0), i8* %buf2) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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; MSVC-X86-LABEL: _test:
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; MSVC-X86: movl ___security_cookie, %[[REG1:[^ ]*]]
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; MSVC-X86: xorl %esp, %[[REG1]]
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; MSVC-X86: movl %[[REG1]], [[SLOT:[0-9]*]](%esp)
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; MSVC-X86: calll _strcpy
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; MSVC-X86: movl [[SLOT]](%esp), %ecx
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; MSVC-X86: xorl %esp, %ecx
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; MSVC-X86: calll @__security_check_cookie@4
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; MSVC-X86: retl
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; MSVC-X64-LABEL: test:
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; MSVC-X64: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
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; MSVC-X64: xorq %rsp, %[[REG1]]
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; MSVC-X64: movq %[[REG1]], [[SLOT:[0-9]*]](%rsp)
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; MSVC-X64: callq strcpy
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; MSVC-X64: movq [[SLOT]](%rsp), %rcx
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; MSVC-X64: xorq %rsp, %rcx
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; MSVC-X64: callq __security_check_cookie
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; MSVC-X64: retq
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; MSVC-X86-O0-LABEL: _test:
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; MSVC-X86-O0: movl ___security_cookie, %[[REG1:[^ ]*]]
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; MSVC-X86-O0: xorl %esp, %[[REG1]]
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; MSVC-X86-O0: movl %[[REG1]], [[SLOT:[0-9]*]](%esp)
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; MSVC-X86-O0: calll _strcpy
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; MSVC-X86-O0: movl [[SLOT]](%esp), %ecx
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; MSVC-X86-O0: xorl %esp, %ecx
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; MSVC-X86-O0: calll @__security_check_cookie@4
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; MSVC-X86-O0: retl
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; MSVC-X64-O0-LABEL: test:
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; MSVC-X64-O0: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
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; MSVC-X64-O0: xorq %rsp, %[[REG1]]
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; MSVC-X64-O0: movq %[[REG1]], [[SLOT:[0-9]*]](%rsp)
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; MSVC-X64-O0: callq strcpy
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; MSVC-X64-O0: movq [[SLOT]](%rsp), %rcx
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; MSVC-X64-O0: xorq %rsp, %rcx
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; MSVC-X64-O0: callq __security_check_cookie
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; MSVC-X64-O0: retq
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declare void @escape(i32*)
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define void @test_vla(i32 %n) nounwind ssp {
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%vla = alloca i32, i32 %n
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call void @escape(i32* %vla)
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ret void
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}
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; MSVC-X86-LABEL: _test_vla:
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; MSVC-X86: pushl %ebp
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; MSVC-X86: movl %esp, %ebp
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; MSVC-X86: movl ___security_cookie, %[[REG1:[^ ]*]]
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; MSVC-X86: xorl %ebp, %[[REG1]]
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; MSVC-X86: movl %[[REG1]], [[SLOT:-[0-9]*]](%ebp)
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; MSVC-X86: calll __chkstk
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; MSVC-X86: pushl
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; MSVC-X86: calll _escape
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; MSVC-X86: movl [[SLOT]](%ebp), %ecx
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; MSVC-X86: xorl %ebp, %ecx
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; MSVC-X86: calll @__security_check_cookie@4
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; MSVC-X86: movl %ebp, %esp
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; MSVC-X86: popl %ebp
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; MSVC-X86: retl
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; MSVC-X64-LABEL: test_vla:
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; MSVC-X64: pushq %rbp
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; MSVC-X64: subq $16, %rsp
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; MSVC-X64: leaq 16(%rsp), %rbp
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; MSVC-X64: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
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; MSVC-X64: xorq %rbp, %[[REG1]]
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; MSVC-X64: movq %[[REG1]], [[SLOT:-[0-9]*]](%rbp)
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; MSVC-X64: callq __chkstk
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; MSVC-X64: callq escape
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; MSVC-X64: movq [[SLOT]](%rbp), %rcx
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; MSVC-X64: xorq %rbp, %rcx
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; MSVC-X64: callq __security_check_cookie
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; MSVC-X64: retq
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; This case is interesting because we address local variables with RBX but XOR
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; the guard value with RBP. That's fine, either value will do, as long as they
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; are the same across the life of the frame.
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define void @test_vla_realign(i32 %n) nounwind ssp {
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%realign = alloca i32, align 32
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%vla = alloca i32, i32 %n
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call void @escape(i32* %realign)
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call void @escape(i32* %vla)
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ret void
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}
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; MSVC-X86-LABEL: _test_vla_realign:
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; MSVC-X86: pushl %ebp
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; MSVC-X86: movl %esp, %ebp
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; MSVC-X86: pushl %esi
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; MSVC-X86: andl $-32, %esp
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; MSVC-X86: subl $32, %esp
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; MSVC-X86: movl %esp, %esi
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; MSVC-X86: movl ___security_cookie, %[[REG1:[^ ]*]]
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; MSVC-X86: xorl %ebp, %[[REG1]]
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; MSVC-X86: movl %[[REG1]], [[SLOT:[0-9]*]](%esi)
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; MSVC-X86: calll __chkstk
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; MSVC-X86: pushl
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; MSVC-X86: calll _escape
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; MSVC-X86: movl [[SLOT]](%esi), %ecx
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; MSVC-X86: xorl %ebp, %ecx
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; MSVC-X86: calll @__security_check_cookie@4
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; MSVC-X86: leal -8(%ebp), %esp
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; MSVC-X86: popl %esi
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; MSVC-X86: popl %ebp
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; MSVC-X86: retl
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; MSVC-X64-LABEL: test_vla_realign:
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; MSVC-X64: pushq %rbp
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; MSVC-X64: pushq %rbx
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; MSVC-X64: subq $32, %rsp
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; MSVC-X64: leaq 32(%rsp), %rbp
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; MSVC-X64: andq $-32, %rsp
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; MSVC-X64: movq %rsp, %rbx
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; MSVC-X64: movq __security_cookie(%rip), %[[REG1:[^ ]*]]
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; MSVC-X64: xorq %rbp, %[[REG1]]
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; MSVC-X64: movq %[[REG1]], [[SLOT:[0-9]*]](%rbx)
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; MSVC-X64: callq __chkstk
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; MSVC-X64: callq escape
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; MSVC-X64: movq [[SLOT]](%rbx), %rcx
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; MSVC-X64: xorq %rbp, %rcx
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; MSVC-X64: callq __security_check_cookie
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; MSVC-X64: retq
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declare i8* @strcpy(i8*, i8*) nounwind
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declare i32 @printf(i8*, ...) nounwind
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