1 ; RUN: llc -mtriple i686-pc-windows-msvc < %s | FileCheck %s
3 ; This test case is also intended to be run manually as a complete functional
4 ; test. It should link, print something, and exit zero rather than crashing.
5 ; It is the hypothetical lowering of a C source program that looks like:
7 ; int safe_div(int *n, int *d) {
12 ; } __except(GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION) {
13 ; puts("EXCEPTION_ACCESS_VIOLATION");
16 ; } __except(GetExceptionCode() == EXCEPTION_INT_DIVIDE_BY_ZERO) {
17 ; puts("EXCEPTION_INT_DIVIDE_BY_ZERO");
23 @str1 = internal constant [27 x i8] c"EXCEPTION_ACCESS_VIOLATION\00"
24 @str2 = internal constant [29 x i8] c"EXCEPTION_INT_DIVIDE_BY_ZERO\00"
26 define i32 @safe_div(i32* %n, i32* %d) personality i8* bitcast (i32 (...)* @_except_handler3 to i8*) {
28 %r = alloca i32, align 4
30 invoke void @try_body(i32* %r, i32* %n, i32* %d)
31 to label %__try.cont unwind label %lpad0
34 %cs0 = catchswitch within none [label %handler0] unwind label %lpad1
37 %p0 = catchpad within %cs0 [i8* bitcast (i32 ()* @safe_div_filt0 to i8*)]
38 call void @puts(i8* getelementptr ([27 x i8], [27 x i8]* @str1, i32 0, i32 0)) [ "funclet"(token %p0) ]
39 store i32 -1, i32* %r, align 4
40 catchret from %p0 to label %__try.cont
43 %cs1 = catchswitch within none [label %handler1] unwind to caller
46 %p1 = catchpad within %cs1 [i8* bitcast (i32 ()* @safe_div_filt1 to i8*)]
47 call void @puts(i8* getelementptr ([29 x i8], [29 x i8]* @str2, i32 0, i32 0)) [ "funclet"(token %p1) ]
48 store i32 -2, i32* %r, align 4
49 catchret from %p1 to label %__try.cont
52 %safe_ret = load i32, i32* %r, align 4
58 ; CHECK: {{^}}_safe_div:
59 ; CHECK: movl $42, [[rloc:.*\(%ebp\)]]
60 ; CHECK: leal [[rloc]],
61 ; CHECK: calll _try_body
62 ; CHECK: [[cont_bb:LBB0_[0-9]+]]:
63 ; CHECK: movl [[rloc]], %eax
68 ; CHECK: [[handler1:LBB0_[0-9]+]]: # %handler1
70 ; CHECK: movl {{.*}}(%ebp), %esp
72 ; CHECK: jmp [[cont_bb]]
74 ; CHECK: [[handler0:LBB0_[0-9]+]]: # %handler0
76 ; CHECK: movl {{.*}}(%ebp), %esp
78 ; CHECK: jmp [[cont_bb]]
80 ; CHECK: .section .xdata,"dr"
81 ; CHECK: L__ehtable$safe_div:
82 ; CHECK-NEXT: .long -1
83 ; CHECK-NEXT: .long _safe_div_filt1
84 ; CHECK-NEXT: .long [[handler1]]
86 ; CHECK-NEXT: .long _safe_div_filt0
87 ; CHECK-NEXT: .long [[handler0]]
89 define void @try_body(i32* %r, i32* %n, i32* %d) {
91 %0 = load i32, i32* %n, align 4
92 %1 = load i32, i32* %d, align 4
93 %div = sdiv i32 %0, %1
94 store i32 %div, i32* %r, align 4
98 ; The prototype of these filter functions is:
99 ; int filter(EXCEPTION_POINTERS *eh_ptrs, void *rbp);
101 ; The definition of EXCEPTION_POINTERS is:
102 ; typedef struct _EXCEPTION_POINTERS {
103 ; EXCEPTION_RECORD *ExceptionRecord;
104 ; CONTEXT *ContextRecord;
105 ; } EXCEPTION_POINTERS;
107 ; The definition of EXCEPTION_RECORD is:
108 ; typedef struct _EXCEPTION_RECORD {
109 ; DWORD ExceptionCode;
111 ; } EXCEPTION_RECORD;
113 define i32 @safe_div_filt0() {
114 %ebp = call i8* @llvm.frameaddress(i32 1)
115 %eh_ptrs.addr.i8 = getelementptr inbounds i8, i8* %ebp, i32 -20
116 %eh_ptrs.addr = bitcast i8* %eh_ptrs.addr.i8 to i32***
117 %eh_ptrs = load i32**, i32*** %eh_ptrs.addr
118 %eh_rec = load i32*, i32** %eh_ptrs
119 %eh_code = load i32, i32* %eh_rec
120 ; EXCEPTION_ACCESS_VIOLATION = 0xC0000005
121 %cmp = icmp eq i32 %eh_code, 3221225477
122 %filt.res = zext i1 %cmp to i32
125 define i32 @safe_div_filt1() {
126 %ebp = call i8* @llvm.frameaddress(i32 1)
127 %eh_ptrs.addr.i8 = getelementptr inbounds i8, i8* %ebp, i32 -20
128 %eh_ptrs.addr = bitcast i8* %eh_ptrs.addr.i8 to i32***
129 %eh_ptrs = load i32**, i32*** %eh_ptrs.addr
130 %eh_rec = load i32*, i32** %eh_ptrs
131 %eh_code = load i32, i32* %eh_rec
132 ; EXCEPTION_INT_DIVIDE_BY_ZERO = 0xC0000094
133 %cmp = icmp eq i32 %eh_code, 3221225620
134 %filt.res = zext i1 %cmp to i32
138 @str_result = internal constant [21 x i8] c"safe_div result: %d\0A\00"
141 %d.addr = alloca i32, align 4
142 %n.addr = alloca i32, align 4
144 store i32 10, i32* %n.addr, align 4
145 store i32 2, i32* %d.addr, align 4
146 %r1 = call i32 @safe_div(i32* %n.addr, i32* %d.addr)
147 call void (i8*, ...) @printf(i8* getelementptr ([21 x i8], [21 x i8]* @str_result, i32 0, i32 0), i32 %r1)
149 store i32 10, i32* %n.addr, align 4
150 store i32 0, i32* %d.addr, align 4
151 %r2 = call i32 @safe_div(i32* %n.addr, i32* %d.addr)
152 call void (i8*, ...) @printf(i8* getelementptr ([21 x i8], [21 x i8]* @str_result, i32 0, i32 0), i32 %r2)
154 %r3 = call i32 @safe_div(i32* %n.addr, i32* null)
155 call void (i8*, ...) @printf(i8* getelementptr ([21 x i8], [21 x i8]* @str_result, i32 0, i32 0), i32 %r3)
159 declare i32 @_except_handler3(...)
160 declare i32 @llvm.eh.typeid.for(i8*) readnone nounwind
161 declare void @puts(i8*)
162 declare void @printf(i8*, ...)
163 declare void @abort()
164 declare i8* @llvm.frameaddress(i32)