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