1; RUN: opt < %s -inline -S | FileCheck %s 2 3; Test that the inliner correctly handles inlining into invoke sites 4; by appending selectors and forwarding _Unwind_Resume directly to the 5; enclosing landing pad. 6 7;; Test 0 - basic functionality. 8 9%struct.A = type { i8 } 10 11@_ZTIi = external constant i8* 12 13declare void @_ZN1AC1Ev(%struct.A*) 14 15declare void @_ZN1AD1Ev(%struct.A*) 16 17declare void @use(i32) nounwind 18 19declare void @opaque() 20 21declare i32 @llvm.eh.typeid.for(i8*) nounwind 22 23declare i32 @__gxx_personality_v0(...) 24 25declare i8* @__cxa_begin_catch(i8*) 26 27declare void @__cxa_end_catch() 28 29declare void @_ZSt9terminatev() 30 31define internal void @test0_in() alwaysinline uwtable ssp { 32entry: 33 %a = alloca %struct.A, align 1 34 %b = alloca %struct.A, align 1 35 call void @_ZN1AC1Ev(%struct.A* %a) 36 invoke void @_ZN1AC1Ev(%struct.A* %b) 37 to label %invoke.cont unwind label %lpad 38 39invoke.cont: 40 invoke void @_ZN1AD1Ev(%struct.A* %b) 41 to label %invoke.cont1 unwind label %lpad 42 43invoke.cont1: 44 call void @_ZN1AD1Ev(%struct.A* %a) 45 ret void 46 47lpad: 48 %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0 49 cleanup 50 invoke void @_ZN1AD1Ev(%struct.A* %a) 51 to label %invoke.cont2 unwind label %terminate.lpad 52 53invoke.cont2: 54 resume { i8*, i32 } %exn 55 56terminate.lpad: 57 %exn1 = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0 58 catch i8* null 59 call void @_ZSt9terminatev() noreturn nounwind 60 unreachable 61} 62 63define void @test0_out() uwtable ssp { 64entry: 65 invoke void @test0_in() 66 to label %ret unwind label %lpad 67 68ret: 69 ret void 70 71lpad: ; preds = %entry 72 %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0 73 catch i8* bitcast (i8** @_ZTIi to i8*) 74 %eh.exc = extractvalue { i8*, i32 } %exn, 0 75 %eh.selector = extractvalue { i8*, i32 } %exn, 1 76 %0 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) nounwind 77 %1 = icmp eq i32 %eh.selector, %0 78 br i1 %1, label %catch, label %eh.resume 79 80catch: 81 %ignored = call i8* @__cxa_begin_catch(i8* %eh.exc) nounwind 82 call void @__cxa_end_catch() nounwind 83 br label %ret 84 85eh.resume: 86 resume { i8*, i32 } %exn 87} 88 89; CHECK: define void @test0_out() 90; CHECK: [[A:%.*]] = alloca %struct.A, 91; CHECK: [[B:%.*]] = alloca %struct.A, 92; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A]]) 93; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B]]) 94; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B]]) 95; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A]]) 96; CHECK: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0 97; CHECK-NEXT: cleanup 98; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*) 99; CHECK-NEXT: invoke void @_ZN1AD1Ev(%struct.A* [[A]]) 100; CHECK-NEXT: to label %[[LBL:[^\s]+]] unwind 101; CHECK: [[LBL]]: 102; CHECK-NEXT: br label %[[LPAD:[^\s]+]] 103; CHECK: ret void 104; CHECK: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0 105; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*) 106; CHECK-NEXT: br label %[[LPAD]] 107; CHECK: [[LPAD]]: 108; CHECK-NEXT: phi { i8*, i32 } [ 109; CHECK-NEXT: extractvalue { i8*, i32 } 110; CHECK-NEXT: extractvalue { i8*, i32 } 111; CHECK-NEXT: call i32 @llvm.eh.typeid.for( 112 113 114;; Test 1 - Correctly handle phis in outer landing pads. 115 116define void @test1_out() uwtable ssp { 117entry: 118 invoke void @test0_in() 119 to label %cont unwind label %lpad 120 121cont: 122 invoke void @test0_in() 123 to label %ret unwind label %lpad 124 125ret: 126 ret void 127 128lpad: 129 %x = phi i32 [ 0, %entry ], [ 1, %cont ] 130 %y = phi i32 [ 1, %entry ], [ 4, %cont ] 131 %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0 132 catch i8* bitcast (i8** @_ZTIi to i8*) 133 %eh.exc = extractvalue { i8*, i32 } %exn, 0 134 %eh.selector = extractvalue { i8*, i32 } %exn, 1 135 %0 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) nounwind 136 %1 = icmp eq i32 %eh.selector, %0 137 br i1 %1, label %catch, label %eh.resume 138 139catch: 140 %ignored = call i8* @__cxa_begin_catch(i8* %eh.exc) nounwind 141 call void @use(i32 %x) 142 call void @use(i32 %y) 143 call void @__cxa_end_catch() nounwind 144 br label %ret 145 146eh.resume: 147 resume { i8*, i32 } %exn 148} 149 150; CHECK: define void @test1_out() 151; CHECK: [[A2:%.*]] = alloca %struct.A, 152; CHECK: [[B2:%.*]] = alloca %struct.A, 153; CHECK: [[A1:%.*]] = alloca %struct.A, 154; CHECK: [[B1:%.*]] = alloca %struct.A, 155; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A1]]) 156; CHECK-NEXT: unwind label %[[LPAD:[^\s]+]] 157; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B1]]) 158; CHECK-NEXT: unwind label %[[LPAD1:[^\s]+]] 159; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B1]]) 160; CHECK-NEXT: unwind label %[[LPAD1]] 161; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A1]]) 162; CHECK-NEXT: unwind label %[[LPAD]] 163 164; Inner landing pad from first inlining. 165; CHECK: [[LPAD1]]: 166; CHECK-NEXT: [[LPADVAL1:%.*]] = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0 167; CHECK-NEXT: cleanup 168; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*) 169; CHECK-NEXT: invoke void @_ZN1AD1Ev(%struct.A* [[A1]]) 170; CHECK-NEXT: to label %[[RESUME1:[^\s]+]] unwind 171; CHECK: [[RESUME1]]: 172; CHECK-NEXT: br label %[[LPAD_JOIN1:[^\s]+]] 173 174; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A2]]) 175; CHECK-NEXT: unwind label %[[LPAD]] 176; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B2]]) 177; CHECK-NEXT: unwind label %[[LPAD2:[^\s]+]] 178; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B2]]) 179; CHECK-NEXT: unwind label %[[LPAD2]] 180; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A2]]) 181; CHECK-NEXT: unwind label %[[LPAD]] 182 183; Inner landing pad from second inlining. 184; CHECK: [[LPAD2]]: 185; CHECK-NEXT: [[LPADVAL2:%.*]] = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0 186; CHECK-NEXT: cleanup 187; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*) 188; CHECK-NEXT: invoke void @_ZN1AD1Ev(%struct.A* [[A2]]) 189; CHECK-NEXT: to label %[[RESUME2:[^\s]+]] unwind 190; CHECK: [[RESUME2]]: 191; CHECK-NEXT: br label %[[LPAD_JOIN2:[^\s]+]] 192 193; CHECK: ret void 194 195; CHECK: [[LPAD]]: 196; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, %entry ], [ 0, {{%.*}} ], [ 1, %cont ], [ 1, {{%.*}} ] 197; CHECK-NEXT: [[Y:%.*]] = phi i32 [ 1, %entry ], [ 1, {{%.*}} ], [ 4, %cont ], [ 4, {{%.*}} ] 198; CHECK-NEXT: [[LPADVAL:%.*]] = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0 199; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*) 200; CHECK-NEXT: br label %[[LPAD_JOIN2]] 201 202; CHECK: [[LPAD_JOIN2]]: 203; CHECK-NEXT: [[XJ2:%.*]] = phi i32 [ [[X]], %[[LPAD]] ], [ 1, %[[RESUME2]] ] 204; CHECK-NEXT: [[YJ2:%.*]] = phi i32 [ [[Y]], %[[LPAD]] ], [ 4, %[[RESUME2]] ] 205; CHECK-NEXT: [[EXNJ2:%.*]] = phi { i8*, i32 } [ [[LPADVAL]], %[[LPAD]] ], [ [[LPADVAL2]], %[[RESUME2]] ] 206; CHECK-NEXT: br label %[[LPAD_JOIN1]] 207 208; CHECK: [[LPAD_JOIN1]]: 209; CHECK-NEXT: [[XJ1:%.*]] = phi i32 [ [[XJ2]], %[[LPAD_JOIN2]] ], [ 0, %[[RESUME1]] ] 210; CHECK-NEXT: [[YJ1:%.*]] = phi i32 [ [[YJ2]], %[[LPAD_JOIN2]] ], [ 1, %[[RESUME1]] ] 211; CHECK-NEXT: [[EXNJ1:%.*]] = phi { i8*, i32 } [ [[EXNJ2]], %[[LPAD_JOIN2]] ], [ [[LPADVAL1]], %[[RESUME1]] ] 212; CHECK-NEXT: extractvalue { i8*, i32 } [[EXNJ1]], 0 213; CHECK-NEXT: [[SELJ1:%.*]] = extractvalue { i8*, i32 } [[EXNJ1]], 1 214; CHECK-NEXT: [[T:%.*]] = call i32 @llvm.eh.typeid.for( 215; CHECK-NEXT: icmp eq i32 [[SELJ1]], [[T]] 216 217; CHECK: call void @use(i32 [[XJ1]]) 218; CHECK: call void @use(i32 [[YJ1]]) 219 220; CHECK: resume { i8*, i32 } 221 222 223;; Test 2 - Don't make invalid IR for inlines into landing pads without eh.exception calls 224define void @test2_out() uwtable ssp { 225entry: 226 invoke void @test0_in() 227 to label %ret unwind label %lpad 228 229ret: 230 ret void 231 232lpad: 233 %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0 234 cleanup 235 call void @_ZSt9terminatev() 236 unreachable 237} 238 239; CHECK: define void @test2_out() 240; CHECK: [[A:%.*]] = alloca %struct.A, 241; CHECK: [[B:%.*]] = alloca %struct.A, 242; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[A]]) 243; CHECK-NEXT: unwind label %[[LPAD:[^\s]+]] 244; CHECK: invoke void @_ZN1AC1Ev(%struct.A* [[B]]) 245; CHECK-NEXT: unwind label %[[LPAD2:[^\s]+]] 246; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[B]]) 247; CHECK-NEXT: unwind label %[[LPAD2]] 248; CHECK: invoke void @_ZN1AD1Ev(%struct.A* [[A]]) 249; CHECK-NEXT: unwind label %[[LPAD]] 250 251 252;; Test 3 - Deal correctly with split unwind edges. 253define void @test3_out() uwtable ssp { 254entry: 255 invoke void @test0_in() 256 to label %ret unwind label %lpad 257 258ret: 259 ret void 260 261lpad: 262 %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0 263 catch i8* bitcast (i8** @_ZTIi to i8*) 264 br label %lpad.cont 265 266lpad.cont: 267 call void @_ZSt9terminatev() 268 unreachable 269} 270 271; CHECK: define void @test3_out() 272; CHECK: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0 273; CHECK-NEXT: cleanup 274; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*) 275; CHECK-NEXT: invoke void @_ZN1AD1Ev( 276; CHECK-NEXT: to label %[[L:[^\s]+]] unwind 277; CHECK: [[L]]: 278; CHECK-NEXT: br label %[[JOIN:[^\s]+]] 279; CHECK: [[JOIN]]: 280; CHECK-NEXT: phi { i8*, i32 } 281; CHECK-NEXT: br label %lpad.cont 282; CHECK: lpad.cont: 283; CHECK-NEXT: call void @_ZSt9terminatev() 284 285 286;; Test 4 - Split unwind edges with a dominance problem 287define void @test4_out() uwtable ssp { 288entry: 289 invoke void @test0_in() 290 to label %cont unwind label %lpad.crit 291 292cont: 293 invoke void @opaque() 294 to label %ret unwind label %lpad 295 296ret: 297 ret void 298 299lpad.crit: 300 %exn = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0 301 catch i8* bitcast (i8** @_ZTIi to i8*) 302 call void @opaque() nounwind 303 br label %terminate 304 305lpad: 306 %exn2 = landingpad {i8*, i32} personality i32 (...)* @__gxx_personality_v0 307 catch i8* bitcast (i8** @_ZTIi to i8*) 308 br label %terminate 309 310terminate: 311 %phi = phi i32 [ 0, %lpad.crit ], [ 1, %lpad ] 312 call void @use(i32 %phi) 313 call void @_ZSt9terminatev() 314 unreachable 315} 316 317; CHECK: define void @test4_out() 318; CHECK: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0 319; CHECK-NEXT: cleanup 320; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*) 321; CHECK-NEXT: invoke void @_ZN1AD1Ev( 322; CHECK-NEXT: to label %[[L:[^\s]+]] unwind 323; CHECK: [[L]]: 324; CHECK-NEXT: br label %[[JOIN:[^\s]+]] 325; CHECK: invoke void @opaque() 326; CHECK-NEXT: unwind label %lpad 327; CHECK: lpad.crit: 328; CHECK-NEXT: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0 329; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*) 330; CHECK-NEXT: br label %[[JOIN]] 331; CHECK: [[JOIN]]: 332; CHECK-NEXT: phi { i8*, i32 } 333; CHECK-NEXT: call void @opaque() [[NUW:#[0-9]+]] 334; CHECK-NEXT: br label %[[FIX:[^\s]+]] 335; CHECK: lpad: 336; CHECK-NEXT: landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0 337; CHECK-NEXT: catch i8* bitcast (i8** @_ZTIi to i8*) 338; CHECK-NEXT: br label %[[FIX]] 339; CHECK: [[FIX]]: 340; CHECK-NEXT: [[T1:%.*]] = phi i32 [ 0, %[[JOIN]] ], [ 1, %lpad ] 341; CHECK-NEXT: call void @use(i32 [[T1]]) 342; CHECK-NEXT: call void @_ZSt9terminatev() 343 344; CHECK: attributes [[NUW]] = { nounwind } 345; CHECK: attributes #1 = { nounwind readnone } 346; CHECK: attributes #2 = { ssp uwtable } 347; CHECK: attributes #3 = { noreturn nounwind } 348