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; RUN: not llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -exception-model=wasm
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -exception-model=wasm -mattr=+exception-handling | FileCheck -allow-deprecated-dag-overlap %s
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
%struct.Cleanup = type { i8 }
@_ZTIi = external constant i8*
declare void @llvm.wasm.throw(i32, i8*)
; CHECK-LABEL: test_throw:
; CHECK-NEXT: i32.const $push0=, 0
; CHECK-NEXT: throw 0, $pop0
define void @test_throw() {
call void @llvm.wasm.throw(i32 0, i8* null)
ret void
}
; CHECK-LABEL: test_catch_rethrow:
; CHECK: try
; CHECK: call foo@FUNCTION
; CHECK: i32.catch $push{{.+}}=, 0
; CHECK-DAG: i32.store __wasm_lpad_context
; CHECK-DAG: i32.store __wasm_lpad_context+4
; CHECK: i32.call $push{{.+}}=, _Unwind_CallPersonality@FUNCTION
; CHECK: i32.call $push{{.+}}=, __cxa_begin_catch@FUNCTION
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: call __cxa_rethrow@FUNCTION
; CHECK-NEXT: rethrow
; CHECK: end_try
define void @test_catch_rethrow() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
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 [i8* bitcast (i8** @_ZTIi to i8*)]
%2 = call i8* @llvm.wasm.get.exception(token %1)
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
%4 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches = icmp eq i32 %3, %4
br i1 %matches, label %catch, label %rethrow
catch: ; preds = %catch.start
%5 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ]
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
rethrow: ; preds = %catch.start
call void @__cxa_rethrow() [ "funclet"(token %1) ]
unreachable
try.cont: ; preds = %entry, %catch
ret void
}
; CHECK-LABEL: test_cleanup:
; CHECK: try
; CHECK: call foo@FUNCTION
; CHECK: catch_all
; CHECK: i32.call $push{{.+}}=, _ZN7CleanupD1Ev@FUNCTION
; CHECK: rethrow
; CHECK: end_try
define void @test_cleanup() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
entry:
%c = alloca %struct.Cleanup, align 1
invoke void @foo()
to label %invoke.cont unwind label %ehcleanup
invoke.cont: ; preds = %entry
%call = call %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* %c)
ret void
ehcleanup: ; preds = %entry
%0 = cleanuppad within none []
%call1 = call %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* %c) [ "funclet"(token %0) ]
cleanupret from %0 unwind to caller
}
; - Tests multple terminate pads are merged into one
; - Tests a catch_all terminate pad is created after a catch terminate pad
; CHECK-LABEL: test_terminatepad
; CHECK: i32.catch
; CHECK: call __clang_call_terminate@FUNCTION
; CHECK: unreachable
; CHECK: catch_all
; CHECK: call _ZSt9terminatev@FUNCTION
; CHECK-NOT: call __clang_call_terminate@FUNCTION
define hidden i32 @test_terminatepad() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
entry:
%c = alloca %struct.Cleanup, align 1
%c1 = alloca %struct.Cleanup, align 1
invoke void @foo()
to label %invoke.cont unwind label %ehcleanup
invoke.cont: ; preds = %entry
%call = invoke %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* %c1)
to label %try.cont unwind label %catch.dispatch
ehcleanup: ; preds = %entry
%0 = cleanuppad within none []
%call4 = invoke %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* %c1) [ "funclet"(token %0) ]
to label %invoke.cont3 unwind label %terminate
invoke.cont3: ; preds = %ehcleanup
cleanupret from %0 unwind label %catch.dispatch
catch.dispatch: ; preds = %invoke.cont3, %invoke.cont
%1 = catchswitch within none [label %catch.start] unwind label %ehcleanup7
catch.start: ; preds = %catch.dispatch
%2 = catchpad within %1 [i8* null]
%3 = call i8* @llvm.wasm.get.exception(token %2)
%4 = call i32 @llvm.wasm.get.ehselector(token %2)
%5 = call i8* @__cxa_begin_catch(i8* %3) [ "funclet"(token %2) ]
invoke void @__cxa_end_catch() [ "funclet"(token %2) ]
to label %invoke.cont5 unwind label %ehcleanup7
invoke.cont5: ; preds = %catch.start
catchret from %2 to label %try.cont
try.cont: ; preds = %invoke.cont5, %invoke.cont
%call6 = call %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* %c)
ret i32 0
ehcleanup7: ; preds = %catch.start, %catch.dispatch
%6 = cleanuppad within none []
%call9 = invoke %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* %c) [ "funclet"(token %6) ]
to label %invoke.cont8 unwind label %terminate10
invoke.cont8: ; preds = %ehcleanup7
cleanupret from %6 unwind to caller
terminate: ; preds = %ehcleanup
%7 = cleanuppad within %0 []
%8 = call i8* @llvm.wasm.get.exception(token %7)
call void @__clang_call_terminate(i8* %8) [ "funclet"(token %7) ]
unreachable
terminate10: ; preds = %ehcleanup7
%9 = cleanuppad within %6 []
%10 = call i8* @llvm.wasm.get.exception(token %9)
call void @__clang_call_terminate(i8* %10) [ "funclet"(token %9) ]
unreachable
}
; Tests prologues and epilogues are not generated within EH scopes.
; They should not be treated as funclets; BBs starting with a catch instruction
; should not have a prologue, and BBs ending with a catchret/cleanupret should
; not have an epilogue. This is separate from __stack_pointer restoring
; instructions after a catch instruction.
; CHECK-LABEL: test_no_prolog_epilog_in_ehpad
; CHECK: try
; CHECK: call foo@FUNCTION
; CHECK: i32.catch
; CHECK-NOT: get_global $push{{.+}}=, __stack_pointer@GLOBAL
; CHECK: try
; CHECK: call foo@FUNCTION
; CHECK: catch_all
; CHECK-NOT: get_global $push{{.+}}=, __stack_pointer@GLOBAL
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK-NOT: set_global __stack_pointer@GLOBAL, $pop{{.+}}
; CHECK: end_try
; CHECK-NOT: set_global __stack_pointer@GLOBAL, $pop{{.+}}
; CHECK: end_try
define void @test_no_prolog_epilog_in_ehpad() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
entry:
%stack_var = alloca i32, align 4
call void @bar(i32* %stack_var)
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 [i8* bitcast (i8** @_ZTIi to i8*)]
%2 = call i8* @llvm.wasm.get.exception(token %1)
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
%4 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches = icmp eq i32 %3, %4
br i1 %matches, label %catch, label %rethrow
catch: ; preds = %catch.start
%5 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ]
%6 = bitcast i8* %5 to float*
%7 = load float, float* %6, align 4
invoke void @foo() [ "funclet"(token %1) ]
to label %invoke.cont1 unwind label %ehcleanup
invoke.cont1: ; preds = %catch
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
rethrow: ; preds = %catch.start
call void @__cxa_rethrow() [ "funclet"(token %1) ]
unreachable
try.cont: ; preds = %entry, %invoke.cont1
ret void
ehcleanup: ; preds = %catch
%8 = cleanuppad within %1 []
call void @__cxa_end_catch() [ "funclet"(token %8) ]
cleanupret from %8 unwind to caller
}
declare void @foo()
declare void @bar(i32*)
declare i32 @__gxx_wasm_personality_v0(...)
declare i8* @llvm.wasm.get.exception(token)
declare i32 @llvm.wasm.get.ehselector(token)
declare i32 @llvm.eh.typeid.for(i8*)
declare i8* @__cxa_begin_catch(i8*)
declare void @__cxa_end_catch()
declare void @__cxa_rethrow()
declare void @__clang_call_terminate(i8*)
declare void @_ZSt9terminatev()
declare %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* returned)
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