| ; RUN: opt < %s -wasm-lower-em-ehsjlj -S | FileCheck %s --check-prefixes=CHECK,NO-TLS |
| ; RUN: opt < %s -wasm-lower-em-ehsjlj -S --mattr=+atomics,+bulk-memory | FileCheck %s --check-prefixes=CHECK,TLS |
| |
| target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" |
| target triple = "wasm32-unknown-unknown" |
| |
| %struct.__jmp_buf_tag = type { [6 x i32], i32, [32 x i32] } |
| |
| @global_var = global i32 0, align 4 |
| ; NO-TLS-DAG: __THREW__ = external global i32 |
| ; NO-TLS-DAG: __threwValue = external global i32 |
| ; TLS-DAG: __THREW__ = external thread_local(localexec) global i32 |
| ; TLS-DAG: __threwValue = external thread_local(localexec) global i32 |
| @global_longjmp_ptr = global void (%struct.__jmp_buf_tag*, i32)* @longjmp, align 4 |
| ; CHECK-DAG: @global_longjmp_ptr = global void (%struct.__jmp_buf_tag*, i32)* bitcast (void (i32, i32)* @emscripten_longjmp to void (%struct.__jmp_buf_tag*, i32)*) |
| |
| ; Test a simple setjmp - longjmp sequence |
| define void @setjmp_longjmp() { |
| ; CHECK-LABEL: @setjmp_longjmp |
| entry: |
| %buf = alloca [1 x %struct.__jmp_buf_tag], align 16 |
| %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0 |
| %call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0 |
| %arraydecay1 = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0 |
| call void @longjmp(%struct.__jmp_buf_tag* %arraydecay1, i32 1) #1 |
| unreachable |
| ; CHECK: entry: |
| ; CHECK-NEXT: %[[MALLOCCALL:.*]] = tail call i8* @malloc(i32 40) |
| ; CHECK-NEXT: %[[SETJMP_TABLE:.*]] = bitcast i8* %[[MALLOCCALL]] to i32* |
| ; CHECK-NEXT: store i32 0, i32* %[[SETJMP_TABLE]] |
| ; CHECK-NEXT: %[[SETJMP_TABLE_SIZE:.*]] = add i32 4, 0 |
| ; CHECK-NEXT: %[[BUF:.*]] = alloca [1 x %struct.__jmp_buf_tag] |
| ; CHECK-NEXT: %[[ARRAYDECAY:.*]] = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %[[BUF]], i32 0, i32 0 |
| ; CHECK-NEXT: %[[SETJMP_TABLE1:.*]] = call i32* @saveSetjmp(%struct.__jmp_buf_tag* %[[ARRAYDECAY]], i32 1, i32* %[[SETJMP_TABLE]], i32 %[[SETJMP_TABLE_SIZE]]) |
| ; CHECK-NEXT: %[[SETJMP_TABLE_SIZE1:.*]] = call i32 @getTempRet0() |
| ; CHECK-NEXT: br label %entry.split |
| |
| ; CHECK: entry.split: |
| ; CHECK-NEXT: phi i32 [ 0, %entry ], [ %[[LONGJMP_RESULT:.*]], %if.end ] |
| ; CHECK-NEXT: %[[ARRAYDECAY1:.*]] = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %[[BUF]], i32 0, i32 0 |
| ; CHECK-NEXT: %[[JMPBUF:.*]] = ptrtoint %struct.__jmp_buf_tag* %[[ARRAYDECAY1]] to i32 |
| ; CHECK-NEXT: store i32 0, i32* @__THREW__ |
| ; CHECK-NEXT: call cc{{.*}} void @__invoke_void_i32_i32(void (i32, i32)* @emscripten_longjmp, i32 %[[JMPBUF]], i32 1) |
| ; CHECK-NEXT: %[[__THREW__VAL:.*]] = load i32, i32* @__THREW__ |
| ; CHECK-NEXT: store i32 0, i32* @__THREW__ |
| ; CHECK-NEXT: %[[CMP0:.*]] = icmp ne i32 %__THREW__.val, 0 |
| ; CHECK-NEXT: %[[THREWVALUE_VAL:.*]] = load i32, i32* @__threwValue |
| ; CHECK-NEXT: %[[CMP1:.*]] = icmp ne i32 %[[THREWVALUE_VAL]], 0 |
| ; CHECK-NEXT: %[[CMP:.*]] = and i1 %[[CMP0]], %[[CMP1]] |
| ; CHECK-NEXT: br i1 %[[CMP]], label %if.then1, label %if.else1 |
| |
| ; CHECK: entry.split.split: |
| ; CHECK-NEXT: unreachable |
| |
| ; CHECK: if.then1: |
| ; CHECK-NEXT: %[[__THREW__VAL_I32P:.*]] = inttoptr i32 %[[__THREW__VAL]] to i32* |
| ; CHECK-NEXT: %[[__THREW__VAL_I32P_LOADED:.*]] = load i32, i32* %[[__THREW__VAL_I32P]] |
| ; CHECK-NEXT: %[[LABEL:.*]] = call i32 @testSetjmp(i32 %[[__THREW__VAL_I32P_LOADED]], i32* %[[SETJMP_TABLE1]], i32 %[[SETJMP_TABLE_SIZE1]]) |
| ; CHECK-NEXT: %[[CMP:.*]] = icmp eq i32 %[[LABEL]], 0 |
| ; CHECK-NEXT: br i1 %[[CMP]], label %if.then2, label %if.end2 |
| |
| ; CHECK: if.else1: |
| ; CHECK-NEXT: br label %if.end |
| |
| ; CHECK: if.end: |
| ; CHECK-NEXT: %[[LABEL_PHI:.*]] = phi i32 [ %[[LABEL:.*]], %if.end2 ], [ -1, %if.else1 ] |
| ; CHECK-NEXT: %[[LONGJMP_RESULT]] = call i32 @getTempRet0() |
| ; CHECK-NEXT: switch i32 %[[LABEL_PHI]], label %entry.split.split [ |
| ; CHECK-NEXT: i32 1, label %entry.split |
| ; CHECK-NEXT: ] |
| |
| ; CHECK: if.then2: |
| ; CHECK-NEXT: call void @emscripten_longjmp(i32 %[[__THREW__VAL]], i32 %[[THREWVALUE_VAL]]) |
| ; CHECK-NEXT: unreachable |
| |
| ; CHECK: if.end2: |
| ; CHECK-NEXT: call void @setTempRet0(i32 %[[THREWVALUE_VAL]]) |
| ; CHECK-NEXT: br label %if.end |
| } |
| |
| ; Test a case of a function call (which is not longjmp) after a setjmp |
| define void @setjmp_other() { |
| ; CHECK-LABEL: @setjmp_other |
| entry: |
| %buf = alloca [1 x %struct.__jmp_buf_tag], align 16 |
| %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0 |
| %call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0 |
| call void @foo() |
| ret void |
| ; CHECK: entry: |
| ; CHECK: %[[SETJMP_TABLE:.*]] = call i32* @saveSetjmp( |
| |
| ; CHECK: entry.split: |
| ; CHECK: @__invoke_void(void ()* @foo) |
| |
| ; CHECK: entry.split.split: |
| ; CHECK-NEXT: %[[BUF:.*]] = bitcast i32* %[[SETJMP_TABLE]] to i8* |
| ; CHECK-NEXT: tail call void @free(i8* %[[BUF]]) |
| ; CHECK-NEXT: ret void |
| } |
| |
| ; Test a case when a function call is within try-catch, after a setjmp |
| define void @exception_and_longjmp() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) { |
| ; CHECK-LABEL: @exception_and_longjmp |
| entry: |
| %buf = alloca [1 x %struct.__jmp_buf_tag], align 16 |
| %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0 |
| %call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0 |
| invoke void @foo() |
| to label %try.cont unwind label %lpad |
| |
| ; CHECK: entry.split: |
| ; CHECK: store i32 0, i32* @__THREW__ |
| ; CHECK-NEXT: call cc{{.*}} void @__invoke_void(void ()* @foo) |
| ; CHECK-NEXT: %[[__THREW__VAL:.*]] = load i32, i32* @__THREW__ |
| ; CHECK-NEXT: store i32 0, i32* @__THREW__ |
| ; CHECK-NEXT: %[[CMP0:.*]] = icmp ne i32 %[[__THREW__VAL]], 0 |
| ; CHECK-NEXT: %[[THREWVALUE_VAL:.*]] = load i32, i32* @__threwValue |
| ; CHECK-NEXT: %[[CMP1:.*]] = icmp ne i32 %[[THREWVALUE_VAL]], 0 |
| ; CHECK-NEXT: %[[CMP:.*]] = and i1 %[[CMP0]], %[[CMP1]] |
| ; CHECK-NEXT: br i1 %[[CMP]], label %if.then1, label %if.else1 |
| |
| ; CHECK: entry.split.split: |
| ; CHECK-NEXT: %[[CMP:.*]] = icmp eq i32 %[[__THREW__VAL]], 1 |
| ; CHECK-NEXT: br i1 %[[CMP]], label %lpad, label %try.cont |
| |
| lpad: ; preds = %entry |
| %0 = landingpad { i8*, i32 } |
| catch i8* null |
| %1 = extractvalue { i8*, i32 } %0, 0 |
| %2 = extractvalue { i8*, i32 } %0, 1 |
| %3 = call i8* @__cxa_begin_catch(i8* %1) #2 |
| call void @__cxa_end_catch() |
| br label %try.cont |
| |
| try.cont: ; preds = %entry, %lpad |
| ret void |
| } |
| |
| ; Test SSA validity |
| define void @ssa(i32 %n) { |
| ; CHECK-LABEL: @ssa |
| entry: |
| %buf = alloca [1 x %struct.__jmp_buf_tag], align 16 |
| %cmp = icmp sgt i32 %n, 5 |
| br i1 %cmp, label %if.then, label %if.end |
| ; CHECK: entry: |
| ; CHECK: %[[SETJMP_TABLE0:.*]] = bitcast i8* |
| ; CHECK: %[[SETJMP_TABLE_SIZE0:.*]] = add i32 4, 0 |
| |
| if.then: ; preds = %entry |
| %0 = load i32, i32* @global_var, align 4 |
| %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0 |
| %call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0 |
| store i32 %0, i32* @global_var, align 4 |
| br label %if.end |
| ; CHECK: if.then: |
| ; CHECK: %[[VAR0:.*]] = load i32, i32* @global_var, align 4 |
| ; CHECK: %[[SETJMP_TABLE1:.*]] = call i32* @saveSetjmp( |
| ; CHECK-NEXT: %[[SETJMP_TABLE_SIZE1:.*]] = call i32 @getTempRet0() |
| |
| ; CHECK: if.then.split: |
| ; CHECK: %[[VAR1:.*]] = phi i32 [ %[[VAR0]], %if.then ], [ %[[VAR2:.*]], %if.end3 ] |
| ; CHECK: %[[SETJMP_TABLE_SIZE2:.*]] = phi i32 [ %[[SETJMP_TABLE_SIZE1]], %if.then ], [ %[[SETJMP_TABLE_SIZE3:.*]], %if.end3 ] |
| ; CHECK: %[[SETJMP_TABLE2:.*]] = phi i32* [ %[[SETJMP_TABLE1]], %if.then ], [ %[[SETJMP_TABLE3:.*]], %if.end3 ] |
| ; CHECK: store i32 %[[VAR1]], i32* @global_var, align 4 |
| |
| if.end: ; preds = %if.then, %entry |
| %arraydecay1 = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0 |
| call void @longjmp(%struct.__jmp_buf_tag* %arraydecay1, i32 5) #1 |
| unreachable |
| ; CHECK: if.end: |
| ; CHECK: %[[VAR2]] = phi i32 [ %[[VAR1]], %if.then.split ], [ undef, %entry ] |
| ; CHECK: %[[SETJMP_TABLE_SIZE3]] = phi i32 [ %[[SETJMP_TABLE_SIZE2]], %if.then.split ], [ %[[SETJMP_TABLE_SIZE0]], %entry ] |
| ; CHECK: %[[SETJMP_TABLE3]] = phi i32* [ %[[SETJMP_TABLE2]], %if.then.split ], [ %[[SETJMP_TABLE0]], %entry ] |
| } |
| |
| ; Test a case when a function only calls other functions that are neither setjmp nor longjmp |
| define void @only_other_func() { |
| entry: |
| call void @foo() |
| ret void |
| ; CHECK: call void @foo() |
| } |
| |
| ; Test a case when a function only calls longjmp and not setjmp |
| define void @only_longjmp() { |
| entry: |
| %buf = alloca [1 x %struct.__jmp_buf_tag], align 16 |
| %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0 |
| call void @longjmp(%struct.__jmp_buf_tag* %arraydecay, i32 5) #1 |
| unreachable |
| ; CHECK: %[[JMPBUF:.*]] = ptrtoint |
| ; CHECK-NEXT: call void @emscripten_longjmp(i32 %[[JMPBUF]], i32 5) |
| } |
| |
| ; Test inline asm handling |
| define void @inline_asm() { |
| ; CHECK-LABEL: @inline_asm |
| entry: |
| %env = alloca [1 x %struct.__jmp_buf_tag], align 16 |
| %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %env, i32 0, i32 0 |
| %call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #4 |
| ; Inline assembly should not generate __invoke wrappers. |
| ; Doing so would fail as inline assembly cannot be passed as a function pointer. |
| ; CHECK: call void asm sideeffect "", ""() |
| ; CHECK-NOT: __invoke_void |
| call void asm sideeffect "", ""() |
| ret void |
| } |
| |
| ; Test that the allocsize attribute is being transformed properly |
| declare i8 *@allocator(i32, %struct.__jmp_buf_tag*) #3 |
| define i8 *@allocsize() { |
| ; CHECK-LABEL: @allocsize |
| entry: |
| %buf = alloca [1 x %struct.__jmp_buf_tag], align 16 |
| %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0 |
| %call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0 |
| ; CHECK: call cc{{.*}} i8* @"__invoke_i8*_i32_%struct.__jmp_buf_tag*"([[ARGS:.*]]) #[[ALLOCSIZE_ATTR:[0-9]+]] |
| %alloc = call i8* @allocator(i32 20, %struct.__jmp_buf_tag* %arraydecay) #3 |
| ret i8 *%alloc |
| } |
| |
| ; Tests if program does not crash when there's no setjmp function calls in the |
| ; module. |
| @buffer = global [1 x %struct.__jmp_buf_tag] zeroinitializer, align 16 |
| define void @longjmp_only() { |
| entry: |
| ; CHECK: call void @emscripten_longjmp |
| call void @longjmp(%struct.__jmp_buf_tag* getelementptr inbounds ([1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* @buffer, i32 0, i32 0), i32 1) #1 |
| unreachable |
| } |
| |
| ; Tests if SSA rewrite works when a use and its def are within the same BB. |
| define void @ssa_rewite_in_same_bb() { |
| entry: |
| call void @foo() |
| br label %for.cond |
| |
| for.cond: ; preds = %for.inc, %entry |
| ; CHECK: %{{.*}} = phi i32 [ %var[[VARNO:.*]], %for.inc.split ] |
| %0 = phi i32 [ %var, %for.inc ], [ undef, %entry ] |
| %var = add i32 0, 0 |
| br label %for.inc |
| |
| for.inc: ; preds = %for.cond |
| %call5 = call i32 @setjmp(%struct.__jmp_buf_tag* undef) #0 |
| br label %for.cond |
| |
| ; CHECK: for.inc.split: |
| ; CHECK: %var[[VARNO]] = phi i32 [ %var, %for.inc ] |
| } |
| |
| ; Tests cases where longjmp function pointer is used in other ways than direct |
| ; calls. longjmps should be replaced with |
| ; (int(*)(jmp_buf*, int))emscripten_longjmp. |
| declare void @take_longjmp(void (%struct.__jmp_buf_tag*, i32)* %arg_ptr) |
| define void @indirect_longjmp() { |
| ; CHECK-LABEL: @indirect_longjmp |
| entry: |
| %local_longjmp_ptr = alloca void (%struct.__jmp_buf_tag*, i32)*, align 4 |
| %buf0 = alloca [1 x %struct.__jmp_buf_tag], align 16 |
| %buf1 = alloca [1 x %struct.__jmp_buf_tag], align 16 |
| |
| ; Store longjmp in a local variable, load it, and call it |
| store void (%struct.__jmp_buf_tag*, i32)* @longjmp, void (%struct.__jmp_buf_tag*, i32)** %local_longjmp_ptr, align 4 |
| ; CHECK: store void (%struct.__jmp_buf_tag*, i32)* bitcast (void (i32, i32)* @emscripten_longjmp to void (%struct.__jmp_buf_tag*, i32)*), void (%struct.__jmp_buf_tag*, i32)** %local_longjmp_ptr, align 4 |
| %longjmp_from_local_ptr = load void (%struct.__jmp_buf_tag*, i32)*, void (%struct.__jmp_buf_tag*, i32)** %local_longjmp_ptr, align 4 |
| %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf0, i32 0, i32 0 |
| call void %longjmp_from_local_ptr(%struct.__jmp_buf_tag* %arraydecay, i32 0) |
| |
| ; Load longjmp from a global variable and call it |
| %longjmp_from_global_ptr = load void (%struct.__jmp_buf_tag*, i32)*, void (%struct.__jmp_buf_tag*, i32)** @global_longjmp_ptr, align 4 |
| %arraydecay1 = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf1, i32 0, i32 0 |
| call void %longjmp_from_global_ptr(%struct.__jmp_buf_tag* %arraydecay1, i32 0) |
| |
| ; Pass longjmp as a function argument. This is a call but longjmp is not a |
| ; callee but an argument. |
| call void @take_longjmp(void (%struct.__jmp_buf_tag*, i32)* @longjmp) |
| ; CHECK: call void @take_longjmp(void (%struct.__jmp_buf_tag*, i32)* bitcast (void (i32, i32)* @emscripten_longjmp to void (%struct.__jmp_buf_tag*, i32)*)) |
| ret void |
| } |
| |
| declare void @foo() |
| ; Function Attrs: returns_twice |
| declare i32 @setjmp(%struct.__jmp_buf_tag*) #0 |
| ; Function Attrs: noreturn |
| declare void @longjmp(%struct.__jmp_buf_tag*, i32) #1 |
| declare i32 @__gxx_personality_v0(...) |
| declare i8* @__cxa_begin_catch(i8*) |
| declare void @__cxa_end_catch() |
| declare i8* @malloc(i32) |
| declare void @free(i8*) |
| |
| ; JS glue functions and invoke wrappers declaration |
| ; CHECK-DAG: declare i32 @getTempRet0() |
| ; CHECK-DAG: declare void @setTempRet0(i32) |
| ; CHECK-DAG: declare i32* @saveSetjmp(%struct.__jmp_buf_tag*, i32, i32*, i32) |
| ; CHECK-DAG: declare i32 @testSetjmp(i32, i32*, i32) |
| ; CHECK-DAG: declare void @emscripten_longjmp(i32, i32) |
| ; CHECK-DAG: declare void @__invoke_void(void ()*) |
| |
| attributes #0 = { returns_twice } |
| attributes #1 = { noreturn } |
| attributes #2 = { nounwind } |
| attributes #3 = { allocsize(0) } |
| ; CHECK-DAG: attributes #{{[0-9]+}} = { nounwind "wasm-import-module"="env" "wasm-import-name"="getTempRet0" } |
| ; CHECK-DAG: attributes #{{[0-9]+}} = { nounwind "wasm-import-module"="env" "wasm-import-name"="setTempRet0" } |
| ; CHECK-DAG: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="__resumeException" } |
| ; CHECK-DAG: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="llvm_eh_typeid_for" } |
| ; CHECK-DAG: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="__invoke_void" } |
| ; CHECK-DAG: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="__cxa_find_matching_catch_3" } |
| ; CHECK-DAG: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="saveSetjmp" } |
| ; CHECK-DAG: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="testSetjmp" } |
| ; CHECK-DAG: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="emscripten_longjmp" } |
| ; CHECK-DAG: attributes #{{[0-9]+}} = { "wasm-import-module"="env" "wasm-import-name"="__invoke_i8*_i32_%struct.__jmp_buf_tag*" } |
| ; CHECK-DAG: attributes #[[ALLOCSIZE_ATTR]] = { allocsize(1) } |
| |
| !llvm.dbg.cu = !{!2} |
| !llvm.module.flags = !{!0} |
| |
| !0 = !{i32 2, !"Debug Info Version", i32 3} |
| !1 = !DIFile(filename: "lower-em-sjlj.c", directory: "test") |
| !2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1) |
| !3 = distinct !DISubprogram(name: "setjmp_debug_info", unit:!2, file: !1, line: 1) |
| !4 = !DILocation(line:2, scope: !3) |
| !5 = !DILocation(line:3, scope: !3) |
| !6 = !DILocation(line:4, scope: !3) |
| !7 = !DILocation(line:5, scope: !3) |
| !8 = !DILocation(line:6, scope: !3) |