Home | History | Annotate | Download | only in X86 
      1 ; RUN: llc -verify-machineinstrs -mtriple=i686-pc-windows-msvc < %s | FileCheck --check-prefix=X86 %s
      2 ; RUN: llc -verify-machineinstrs -mtriple=x86_64-pc-windows-msvc < %s | FileCheck --check-prefix=X64 %s
      3 
      4 ; Loosely based on IR for this C++ source code:
      5 ;   void f(int p);
      6 ;   int main() {
      7 ;     try {
      8 ;       f(1);
      9 ;     } catch (int e) {
     10 ;       f(e);
     11 ;     } catch (...) {
     12 ;       f(3);
     13 ;     }
     14 ;   }
     15 
     16 %rtti.TypeDescriptor2 = type { i8**, i8*, [3 x i8] }
     17 %eh.CatchableType = type { i32, i8*, i32, i32, i32, i32, i8* }
     18 %eh.CatchableTypeArray.1 = type { i32, [1 x %eh.CatchableType*] }
     19 %eh.ThrowInfo = type { i32, i8*, i8*, i8* }
     20 
     21 $"\01??_R0H@8" = comdat any
     22 
     23 @"\01??_7type_info@@6B@" = external constant i8*
     24 @"\01??_R0H@8" = linkonce_odr global %rtti.TypeDescriptor2 { i8** @"\01??_7type_info@@6B@", i8* null, [3 x i8] c".H\00" }, comdat
     25 
     26 
     27 declare void @f(i32 %p, i32* %l)
     28 declare i1 @getbool()
     29 declare i32 @__CxxFrameHandler3(...)
     30 
     31 define i32 @try_catch_catch() personality i32 (...)* @__CxxFrameHandler3 {
     32 entry:
     33   %e.addr = alloca i32
     34   %local = alloca i32
     35   invoke void @f(i32 1, i32* %local)
     36           to label %try.cont unwind label %catch.dispatch
     37 
     38 catch.dispatch:                                   ; preds = %entry
     39   %cs = catchswitch within none [label %handler1, label %handler2] unwind to caller
     40 
     41 handler1:
     42   %h1 = catchpad within %cs [%rtti.TypeDescriptor2* @"\01??_R0H@8", i32 0, i32* %e.addr]
     43   %e = load i32, i32* %e.addr
     44   call void @f(i32 %e, i32* %local) [ "funclet"(token %h1) ]
     45   catchret from %h1 to label %try.cont
     46 
     47 handler2:
     48   %h2 = catchpad within %cs [i8* null, i32 64, i8* null]
     49   call void @f(i32 3, i32* %local) [ "funclet"(token %h2) ]
     50   catchret from %h2 to label %try.cont
     51 
     52 try.cont:
     53   ret i32 0
     54 }
     55 
     56 ; X86-LABEL: _try_catch_catch:
     57 ; X86: movl %esp, -[[sp_offset:[0-9]+]](%ebp)
     58 ; X86: movl $0, -{{[0-9]+}}(%ebp)
     59 ; X86: leal -[[local_offs:[0-9]+]](%ebp), %[[addr_reg:[a-z]+]]
     60 ; X86-DAG: movl %[[addr_reg]], 4(%esp)
     61 ; X86-DAG: movl $1, (%esp)
     62 ; X86: calll _f
     63 ; X86: [[contbb:LBB0_[0-9]+]]: # %try.cont
     64 ; X86: retl
     65 
     66 ; X86: [[restorebb1:LBB0_[0-9]+]]: # Block address taken
     67 ; X86-NEXT:                        # %handler1
     68 ; X86-NEXT: addl $12, %ebp
     69 ; X86: jmp [[contbb]]
     70 
     71 ; FIXME: These should be de-duplicated.
     72 ; X86: [[restorebb2:LBB0_[0-9]+]]: # Block address taken
     73 ; X86-NEXT:                        # %handler2
     74 ; X86-NEXT: addl $12, %ebp
     75 ; X86: jmp [[contbb]]
     76 
     77 ; X86: "?catch$[[catch1bb:[0-9]+]]@?0?try_catch_catch@4HA":
     78 ; X86: LBB0_[[catch1bb]]: # %handler1{{$}}
     79 ; X86: pushl %ebp
     80 ; X86: subl $8, %esp
     81 ; X86: addl $12, %ebp
     82 ; X86: movl %esp, -[[sp_offset]](%ebp)
     83 ; X86-DAG: movl -32(%ebp), %[[e_reg:[a-z]+]]
     84 ; X86-DAG: leal -[[local_offs]](%ebp), %[[addr_reg:[a-z]+]]
     85 ; X86-DAG: movl $1, -{{[0-9]+}}(%ebp)
     86 ; X86-DAG: movl %[[addr_reg]], 4(%esp)
     87 ; X86-DAG: movl %[[e_reg]], (%esp)
     88 ; X86: calll _f
     89 ; X86-NEXT: movl $[[restorebb1]], %eax
     90 ; X86-NEXT: addl $8, %esp
     91 ; X86-NEXT: popl %ebp
     92 ; X86-NEXT: retl
     93 
     94 ; X86: "?catch$[[catch2bb:[0-9]+]]@?0?try_catch_catch@4HA":
     95 ; X86: LBB0_[[catch2bb]]: # %handler2{{$}}
     96 ; X86: pushl %ebp
     97 ; X86: subl $8, %esp
     98 ; X86: addl $12, %ebp
     99 ; X86: movl %esp, -[[sp_offset]](%ebp)
    100 ; X86-DAG: leal -[[local_offs]](%ebp), %[[addr_reg:[a-z]+]]
    101 ; X86-DAG: movl $1, -{{[0-9]+}}(%ebp)
    102 ; X86-DAG: movl %[[addr_reg]], 4(%esp)
    103 ; X86-DAG: movl $3, (%esp)
    104 ; X86: calll _f
    105 ; X86-NEXT: movl $[[restorebb2]], %eax
    106 ; X86-NEXT: addl $8, %esp
    107 ; X86-NEXT: popl %ebp
    108 ; X86-NEXT: retl
    109 
    110 ; X86: L__ehtable$try_catch_catch:
    111 ; X86: $handlerMap$0$try_catch_catch:
    112 ; X86-NEXT:   .long   0
    113 ; X86-NEXT:   .long   "??_R0H@8"
    114 ; X86-NEXT:   .long   -20
    115 ; X86-NEXT:   .long   "?catch$[[catch1bb]]@?0?try_catch_catch@4HA"
    116 ; X86-NEXT:   .long   64
    117 ; X86-NEXT:   .long   0
    118 ; X86-NEXT:   .long   0
    119 ; X86-NEXT:   .long   "?catch$[[catch2bb]]@?0?try_catch_catch@4HA"
    120 
    121 ; X64-LABEL: try_catch_catch:
    122 ; X64: Lfunc_begin0:
    123 ; X64: pushq %rbp
    124 ; X64: .seh_pushreg 5
    125 ; X64: subq $48, %rsp
    126 ; X64: .seh_stackalloc 48
    127 ; X64: leaq 48(%rsp), %rbp
    128 ; X64: .seh_setframe 5, 48
    129 ; X64: .seh_endprologue
    130 ; X64: movq $-2, -8(%rbp)
    131 ; X64: .Ltmp0
    132 ; X64-DAG: leaq -[[local_offs:[0-9]+]](%rbp), %rdx
    133 ; X64-DAG: movl $1, %ecx
    134 ; X64: callq f
    135 ; X64: [[contbb:\.LBB0_[0-9]+]]: # Block address taken
    136 ; X64-NEXT:                      # %try.cont
    137 ; X64: addq $48, %rsp
    138 ; X64: popq %rbp
    139 ; X64: retq
    140 
    141 ; X64: "?catch$[[catch1bb:[0-9]+]]@?0?try_catch_catch@4HA":
    142 ; X64: LBB0_[[catch1bb]]: # %handler1{{$}}
    143 ; X64: movq %rdx, 16(%rsp)
    144 ; X64: pushq %rbp
    145 ; X64: .seh_pushreg 5
    146 ; X64: subq $32, %rsp
    147 ; X64: .seh_stackalloc 32
    148 ; X64: leaq 48(%rdx), %rbp
    149 ; X64: .seh_endprologue
    150 ; X64-DAG: leaq -[[local_offs]](%rbp), %rdx
    151 ; X64-DAG: movl -12(%rbp), %ecx
    152 ; X64: callq f
    153 ; X64: leaq [[contbb]](%rip), %rax
    154 ; X64-NEXT: addq $32, %rsp
    155 ; X64-NEXT: popq %rbp
    156 ; X64-NEXT: retq
    157 
    158 ; X64: "?catch$[[catch2bb:[0-9]+]]@?0?try_catch_catch@4HA":
    159 ; X64: LBB0_[[catch2bb]]: # %handler2{{$}}
    160 ; X64: movq %rdx, 16(%rsp)
    161 ; X64: pushq %rbp
    162 ; X64: .seh_pushreg 5
    163 ; X64: subq $32, %rsp
    164 ; X64: .seh_stackalloc 32
    165 ; X64: leaq 48(%rdx), %rbp
    166 ; X64: .seh_endprologue
    167 ; X64-DAG: leaq -[[local_offs]](%rbp), %rdx
    168 ; X64-DAG: movl $3, %ecx
    169 ; X64: callq f
    170 ; X64: leaq [[contbb]](%rip), %rax
    171 ; X64-NEXT: addq $32, %rsp
    172 ; X64-NEXT: popq %rbp
    173 ; X64-NEXT: retq
    174 
    175 ; X64: $cppxdata$try_catch_catch:
    176 ; X64-NEXT: .long   429065506
    177 ; X64-NEXT: .long   2
    178 ; X64-NEXT: .long   ($stateUnwindMap$try_catch_catch)@IMGREL
    179 ; X64-NEXT: .long   1
    180 ; X64-NEXT: .long   ($tryMap$try_catch_catch)@IMGREL
    181 ; X64-NEXT: .long   5
    182 ; X64-NEXT: .long   ($ip2state$try_catch_catch)@IMGREL
    183 ; X64-NEXT: .long   40
    184 ; X64-NEXT: .long   0
    185 ; X64-NEXT: .long   1
    186 
    187 ; X64: $tryMap$try_catch_catch:
    188 ; X64-NEXT: .long   0
    189 ; X64-NEXT: .long   0
    190 ; X64-NEXT: .long   1
    191 ; X64-NEXT: .long   2
    192 ; X64-NEXT: .long   ($handlerMap$0$try_catch_catch)@IMGREL
    193 
    194 ; X64: $handlerMap$0$try_catch_catch:
    195 ; X64-NEXT:   .long   0
    196 ; X64-NEXT:   .long   "??_R0H@8"@IMGREL
    197 ; X64-NEXT:   .long   36
    198 ; X64-NEXT:   .long   "?catch$[[catch1bb]]@?0?try_catch_catch@4HA"@IMGREL
    199 ; X64-NEXT:   .long   56
    200 ; X64-NEXT:   .long   64
    201 ; X64-NEXT:   .long   0
    202 ; X64-NEXT:   .long   0
    203 ; X64-NEXT:   .long   "?catch$[[catch2bb]]@?0?try_catch_catch@4HA"@IMGREL
    204 ; X64-NEXT:   .long   56
    205 
    206 ; X64: $ip2state$try_catch_catch:
    207 ; X64-NEXT: .long   .Lfunc_begin0@IMGREL
    208 ; X64-NEXT: .long   -1
    209 ; X64-NEXT: .long   .Ltmp0@IMGREL+1
    210 ; X64-NEXT: .long   0
    211 ; X64-NEXT: .long   .Ltmp1@IMGREL+1
    212 ; X64-NEXT: .long   -1
    213 ; X64-NEXT: .long   "?catch$[[catch1bb]]@?0?try_catch_catch@4HA"@IMGREL
    214 ; X64-NEXT: .long   1
    215 ; X64-NEXT: .long   "?catch$[[catch2bb]]@?0?try_catch_catch@4HA"@IMGREL
    216 ; X64-NEXT: .long   1
    217 
    218 
    219 define i32 @branch_to_normal_dest() personality i32 (...)* @__CxxFrameHandler3 {
    220 entry:
    221   invoke void @f(i32 1, i32* null)
    222           to label %try.cont unwind label %catch.dispatch
    223 
    224 catch.dispatch:
    225   %cs1 = catchswitch within none [label %catch] unwind to caller
    226 
    227 catch:
    228   %cp1 = catchpad within %cs1 [i8* null, i32 64, i8* null]
    229   br label %loop
    230 
    231 loop:
    232   %V = call i1 @getbool() [ "funclet"(token %cp1) ]
    233   br i1 %V, label %loop, label %catch.done
    234 
    235 catch.done:
    236   catchret from %cp1 to label %try.cont
    237 
    238 try.cont:
    239   ret i32 0
    240 }
    241 
    242 ; X86-LABEL: _branch_to_normal_dest:
    243 ; X86: calll _f
    244 
    245 ; X86: [[contbb:LBB1_[0-9]+]]: # %try.cont
    246 ; X86: retl
    247 
    248 ; X86: [[restorebb:LBB1_[0-9]+]]: # Block address taken
    249 ; X86-NEXT:                       # %catch.done
    250 ; X86-NEXT: addl $12, %ebp
    251 ; X86: jmp [[contbb]]
    252 
    253 ; X86: "?catch$[[catchbb:[0-9]+]]@?0?branch_to_normal_dest@4HA":
    254 ; X86: LBB1_[[catchbb]]: # %catch{{$}}
    255 ; X86: pushl %ebp
    256 ; X86: subl $8, %esp
    257 ; X86: addl $12, %ebp
    258 ; X86: LBB1_[[loopbb:[0-9]+]]: # %loop
    259 ; X86: movl    $1, -16(%ebp)
    260 ; X86: calll   _getbool
    261 ; X86: testb   $1, %al
    262 ; X86: jne LBB1_[[loopbb]]
    263 ; X86: # %catch.done
    264 ; X86-NEXT: movl $[[restorebb]], %eax
    265 ; X86-NEXT: addl $8, %esp
    266 ; X86-NEXT: popl %ebp
    267 ; X86-NEXT: retl
    268 
    269 ; X86: L__ehtable$branch_to_normal_dest:
    270 ; X86: $handlerMap$0$branch_to_normal_dest:
    271 ; X86-NEXT:   .long   64
    272 ; X86-NEXT:   .long   0
    273 ; X86-NEXT:   .long   0
    274 ; X86-NEXT:   .long   "?catch$[[catchbb]]@?0?branch_to_normal_dest@4HA"
    275 
    276 ; X64-LABEL: branch_to_normal_dest:
    277 ; X64: # %entry
    278 ; X64: pushq %rbp
    279 ; X64: .seh_pushreg 5
    280 ; X64: subq $48, %rsp
    281 ; X64: .seh_stackalloc 48
    282 ; X64: leaq 48(%rsp), %rbp
    283 ; X64: .seh_setframe 5, 48
    284 ; X64: .seh_endprologue
    285 ; X64: .Ltmp[[before_call:[0-9]+]]:
    286 ; X64: callq f
    287 ; X64: .Ltmp[[after_call:[0-9]+]]:
    288 ; X64: [[contbb:\.LBB1_[0-9]+]]: # Block address taken
    289 ; X64-NEXT:                      # %try.cont
    290 ; X64: addq $48, %rsp
    291 ; X64: popq %rbp
    292 ; X64: retq
    293 
    294 ; X64: "?catch$[[catchbb:[0-9]+]]@?0?branch_to_normal_dest@4HA":
    295 ; X64: LBB1_[[catchbb]]: # %catch{{$}}
    296 ; X64: movq %rdx, 16(%rsp)
    297 ; X64: pushq %rbp
    298 ; X64: .seh_pushreg 5
    299 ; X64: subq $32, %rsp
    300 ; X64: .seh_stackalloc 32
    301 ; X64: leaq 48(%rdx), %rbp
    302 ; X64: .seh_endprologue
    303 ; X64: .LBB1_[[normal_dest_bb:[0-9]+]]: # %loop
    304 ; X64: callq   getbool
    305 ; X64: testb   $1, %al
    306 ; X64: jne     .LBB1_[[normal_dest_bb]]
    307 ; X64: # %catch.done
    308 ; X64: leaq [[contbb]](%rip), %rax
    309 ; X64-NEXT: addq $32, %rsp
    310 ; X64-NEXT: popq %rbp
    311 ; X64-NEXT: retq
    312 
    313 ; X64-LABEL: $cppxdata$branch_to_normal_dest:
    314 ; X64-NEXT: .long   429065506
    315 ; X64-NEXT: .long   2
    316 ; X64-NEXT: .long   ($stateUnwindMap$branch_to_normal_dest)@IMGREL
    317 ; X64-NEXT: .long   1
    318 ; X64-NEXT: .long   ($tryMap$branch_to_normal_dest)@IMGREL
    319 ; X64-NEXT: .long   4
    320 ; X64-NEXT: .long   ($ip2state$branch_to_normal_dest)@IMGREL
    321 ; X64-NEXT: .long   40
    322 ; X64-NEXT: .long   0
    323 ; X64-NEXT: .long   1
    324 
    325 ; X64-LABEL: $stateUnwindMap$branch_to_normal_dest:
    326 ; X64-NEXT: .long   -1
    327 ; X64-NEXT: .long   0
    328 ; X64-NEXT: .long   -1
    329 ; X64-NEXT: .long   0
    330 
    331 ; X64-LABEL: $tryMap$branch_to_normal_dest:
    332 ; X64-NEXT: .long   0
    333 ; X64-NEXT: .long   0
    334 ; X64-NEXT: .long   1
    335 ; X64-NEXT: .long   1
    336 ; X64-NEXT: .long   ($handlerMap$0$branch_to_normal_dest)@IMGREL
    337 
    338 ; X64-LABEL: $handlerMap$0$branch_to_normal_dest:
    339 ; X64-NEXT: .long   64
    340 ; X64-NEXT: .long   0
    341 ; X64-NEXT: .long   0
    342 ; X64-NEXT: .long   "?catch$[[catchbb]]@?0?branch_to_normal_dest@4HA"@IMGREL
    343 ; X64-NEXT: .long   56
    344 
    345 ; X64-LABEL: $ip2state$branch_to_normal_dest:
    346 ; X64-NEXT: .long   .Lfunc_begin1@IMGREL
    347 ; X64-NEXT: .long   -1
    348 ; X64-NEXT: .long   .Ltmp[[before_call]]@IMGREL+1
    349 ; X64-NEXT: .long   0
    350 ; X64-NEXT: .long   .Ltmp[[after_call]]@IMGREL+1
    351 ; X64-NEXT: .long   -1
    352 ; X64-NEXT: .long   "?catch$[[catchbb]]@?0?branch_to_normal_dest@4HA"@IMGREL
    353 ; X64-NEXT: .long   1
    354