; RUN: opt < %s -win-eh-prepare -demote-catchswitch-only -wasm-eh-prepare -S | FileCheck %s
; RUN: opt < %s -win-eh-prepare -demote-catchswitch-only -wasm-eh-prepare -S --mattr=+atomics,+bulk-memory | FileCheck %s
; RUN: opt < %s -passes='win-eh-prepare<demote-catchswitch-only>,wasm-eh-prepare' -S | FileCheck %s
; RUN: opt < %s -passes='win-eh-prepare<demote-catchswitch-only>,wasm-eh-prepare' -S --mattr=+atomics,+bulk-memory | FileCheck %s
; RUN: llc < %s -wasm-enable-eh -exception-model=wasm -mattr=+exception-handling -stop-after=wasm-eh-prepare | FileCheck %s
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
; CHECK: @__wasm_lpad_context = external thread_local global { i32, ptr, i32 }
@_ZTIi = external constant ptr
%struct.Temp = type { i8 }
; A single 'catch (int)' clause.
; A wasm.catch() call, wasm.lsda() call, and personality call to generate a
; selector should all be genereated after the catchpad.
;
; void foo();
; void test0() {
; try {
; foo();
; } catch (int) {
; }
; }
define void @test0() personality ptr @__gxx_wasm_personality_v0 {
; CHECK-LABEL: @test0()
entry:
invoke void @foo()
to label %try.cont unwind label %catch.dispatch
catch.dispatch: ; preds = %entry
%0 = catchswitch within none [label %catch.start] unwind to caller
catch.start: ; preds = %catch.dispatch
%1 = catchpad within %0 [ptr @_ZTIi]
%2 = call ptr @llvm.wasm.get.exception(token %1)
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
%4 = call i32 @llvm.eh.typeid.for(ptr @_ZTIi)
%matches = icmp eq i32 %3, %4
br i1 %matches, label %catch, label %rethrow
; CHECK: catch.start:
; CHECK-NEXT: %[[CATCHPAD:.*]] = catchpad
; CHECK-NEXT: %[[EXN:.*]] = call ptr @llvm.wasm.catch(i32 0)
; CHECK-NEXT: call void @llvm.wasm.landingpad.index(token %[[CATCHPAD]], i32 0)
; CHECK-NEXT: store i32 0, ptr @__wasm_lpad_context
; CHECK-NEXT: %[[LSDA:.*]] = call ptr @llvm.wasm.lsda()
; CHECK-NEXT: store ptr %[[LSDA]], ptr getelementptr inbounds ({ i32, ptr, i32 }, ptr @__wasm_lpad_context, i32 0, i32 1)
; CHECK-NEXT: call i32 @_Unwind_CallPersonality(ptr %[[EXN]]) {{.*}} [ "funclet"(token %[[CATCHPAD]]) ]
; CHECK-NEXT: %[[SELECTOR:.*]] = load i32, ptr getelementptr inbounds ({ i32, ptr, i32 }, ptr @__wasm_lpad_context, i32 0, i32 2)
; CHECK: icmp eq i32 %[[SELECTOR]]
catch: ; preds = %catch.start
%5 = call ptr @__cxa_begin_catch(ptr %2) [ "funclet"(token %1) ]
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
; CHECK: catch:
; CHECK-NEXT: call ptr @__cxa_begin_catch(ptr %[[EXN]])
rethrow: ; preds = %catch.start
call void @llvm.wasm.rethrow() [ "funclet"(token %1) ]
unreachable
try.cont: ; preds = %entry, %catch
ret void
}
; Two try-catches.
; For the catchpad with a single 'catch (...)', only a wasm.catch() call should
; be generated after the catchpad; wasm.landingpad.index() and personality call
; should NOT be generated. For the other catchpad, the argument of
; wasm.landingpad.index() should be not 1 but 0.
;
; void foo();
; void test1() {
; try {
; foo();
; } catch (...) {
; }
; try {
; foo();
; } catch (int) {
; }
; }
define void @test1() personality ptr @__gxx_wasm_personality_v0 {
; CHECK-LABEL: @test1()
entry:
invoke void @foo()
to label %try.cont unwind label %catch.dispatch
catch.dispatch: ; preds = %entry
%0 = catchswitch within none [label %catch.start] unwind to caller
catch.start: ; preds = %catch.dispatch
%1 = catchpad within %0 [ptr null]
%2 = call ptr @llvm.wasm.get.exception(token %1)
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
%4 = call ptr @__cxa_begin_catch(ptr %2) [ "funclet"(token %1) ]
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
; CHECK: catch.start:
; CHECK-NEXT: catchpad within %0 [ptr null]
; CHECK-NOT: call void @llvm.wasm.landingpad.index
; CHECK-NOT: store {{.*}} @__wasm_lpad_context
; CHECK-NOT: call ptr @llvm.wasm.lsda()
; CHECK-NOT: call i32 @_Unwind_CallPersonality
; CHECK-NOT: load {{.*}} @__wasm_lpad_context
try.cont: ; preds = %entry, %catch.start
invoke void @foo()
to label %try.cont7 unwind label %catch.dispatch2
catch.dispatch2: ; preds = %try.cont
%5 = catchswitch within none [label %catch.start3] unwind to caller
catch.start3: ; preds = %catch.dispatch2
%6 = catchpad within %5 [ptr @_ZTIi]
%7 = call ptr @llvm.wasm.get.exception(token %6)
%8 = call i32 @llvm.wasm.get.ehselector(token %6)
%9 = call i32 @llvm.eh.typeid.for(ptr @_ZTIi)
%matches = icmp eq i32 %8, %9
br i1 %matches, label %catch4, label %rethrow
; CHECK: catch.start3:
; CHECK: call void @llvm.wasm.landingpad.index(token %{{.+}}, i32 0)
catch4: ; preds = %catch.start3
%10 = call ptr @__cxa_begin_catch(ptr %7) [ "funclet"(token %6) ]
call void @__cxa_end_catch() [ "funclet"(token %6) ]
catchret from %6 to label %try.cont7
rethrow: ; preds = %catch.start3
call void @llvm.wasm.rethrow() [ "funclet"(token %6) ]
unreachable
try.cont7: ; preds = %try.cont, %catch4
ret void
}
; PHI demotion test. Only the phi before catchswitch should be demoted; the phi
; before cleanuppad should NOT.
;
; void foo();
; int bar(int) noexcept;
; struct Temp {
; ~Temp() {}
; };
;
; void test2() {
; int num;
; try {
; Temp t;
; num = 1;
; foo();
; num = 2;
; foo();
; } catch (...) {
; bar(num);
; }
; try {
; foo();
; num = 1;
; foo();
; num = 2;
; } catch (...) {
; bar(num);
; }
; }
define void @test2() personality ptr @__gxx_wasm_personality_v0 {
; CHECK-LABEL: @test2
entry:
%t = alloca %struct.Temp, align 1
invoke void @foo()
to label %invoke.cont unwind label %ehcleanup
invoke.cont: ; preds = %entry
invoke void @foo()
to label %invoke.cont1 unwind label %ehcleanup
invoke.cont1: ; preds = %invoke.cont
%call = call ptr @_ZN4TempD2Ev(ptr %t)
br label %try.cont
ehcleanup: ; preds = %invoke.cont, %entry
%num.0 = phi i32 [ 2, %invoke.cont ], [ 1, %entry ]
%0 = cleanuppad within none []
%call2 = call ptr @_ZN4TempD2Ev(ptr %t) [ "funclet"(token %0) ]
cleanupret from %0 unwind label %catch.dispatch
; CHECK: ehcleanup:
; CHECK-NEXT: = phi
catch.dispatch: ; preds = %ehcleanup
%1 = catchswitch within none [label %catch.start] unwind to caller
catch.start: ; preds = %catch.dispatch
%2 = catchpad within %1 [ptr null]
%3 = call ptr @llvm.wasm.get.exception(token %2)
%4 = call i32 @llvm.wasm.get.ehselector(token %2)
%5 = call ptr @__cxa_begin_catch(ptr %3) [ "funclet"(token %2) ]
call void @bar(i32 %num.0) [ "funclet"(token %2) ]
call void @__cxa_end_catch() [ "funclet"(token %2) ]
catchret from %2 to label %try.cont
try.cont: ; preds = %catch.start, %invoke.cont1
invoke void @foo()
to label %invoke.cont3 unwind label %catch.dispatch5
invoke.cont3: ; preds = %try.cont
invoke void @foo()
to label %try.cont10 unwind label %catch.dispatch5
catch.dispatch5: ; preds = %invoke.cont3, %try.cont
%num.1 = phi i32 [ 2, %invoke.cont3 ], [ 1, %try.cont ]
%6 = catchswitch within none [label %catch.start6] unwind to caller
; CHECK: catch.dispatch5:
; CHECK-NOT: = phi
catch.start6: ; preds = %catch.dispatch5
%7 = catchpad within %6 [ptr null]
%8 = call ptr @llvm.wasm.get.exception(token %7)
%9 = call i32 @llvm.wasm.get.ehselector(token %7)
%10 = call ptr @__cxa_begin_catch(ptr %8) [ "funclet"(token %7) ]
call void @bar(i32 %num.1) [ "funclet"(token %7) ]
call void @__cxa_end_catch() [ "funclet"(token %7) ]
catchret from %7 to label %try.cont10
try.cont10: ; preds = %invoke.cont3, %catch.start6
ret void
}
; Tests if instructions after a call to @llvm.wasm.throw are deleted and the
; BB's dead children are deleted.
; CHECK-LABEL: @test3
define i32 @test3(i1 %b, ptr %p) {
entry:
br i1 %b, label %bb.true, label %bb.false
; CHECK: bb.true:
; CHECK-NEXT: call void @llvm.wasm.throw(i32 0, ptr %p)
; CHECK-NEXT: unreachable
bb.true: ; preds = %entry
call void @llvm.wasm.throw(i32 0, ptr %p)
br label %bb.true.0
; CHECK-NOT: bb.true.0
bb.true.0: ; preds = %bb.true
br label %merge
bb.false: ; preds = %entry
br label %merge
; CHECK: merge
merge: ; preds = %bb.true.0, %bb.false
ret i32 0
}
declare void @foo()
declare void @bar(i32)
declare ptr @_ZN4TempD2Ev(ptr returned)
declare i32 @__gxx_wasm_personality_v0(...)
; Function Attrs: nounwind
declare ptr @llvm.wasm.get.exception(token) #0
; Function Attrs: nounwind
declare i32 @llvm.wasm.get.ehselector(token) #0
; Function Attrs: nounwind
declare i32 @llvm.eh.typeid.for(ptr) #0
; Function Attrs: noreturn
declare void @llvm.wasm.throw(i32, ptr) #1
; Function Attrs: noreturn
declare void @llvm.wasm.rethrow() #1
declare ptr @__cxa_begin_catch(ptr)
declare void @__cxa_end_catch()
declare void @_ZSt9terminatev()
attributes #0 = { nounwind }
attributes #1 = { noreturn }
; CHECK-DAG: declare void @llvm.wasm.landingpad.index(token, i32 immarg)
; CHECK-DAG: declare ptr @llvm.wasm.lsda()
; CHECK-DAG: declare i32 @_Unwind_CallPersonality(ptr)
Codebase Browser
llvm