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llvm-project/llvm/test/CodeGen/WebAssembly/exception.ll

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[WebAssembly] Support instruction selection for catching exceptions Summary: This lowers exception catching-related instructions: 1. Lowers `wasm.catch` intrinsic to `catch` instruction 2. Removes `catchpad` and `cleanuppad` instructions; they are not necessary after isel phase. (`MachineBasicBlock::isEHFuncletEntry()` or `MachineBasicBlock::isEHPad()` can be used instead.) 3. Lowers `catchret` and `cleanupret` instructions to pseudo `catchret` and `cleanupret` instructions in isel, which will be replaced with other instructions in `WebAssemblyExceptionPrepare` pass. 4. Adds 'WebAssemblyExceptionPrepare` pass, which is for running various transformation for EH. Currently this pass only replaces `catchret` and `cleanupret` instructions into appropriate wasm instructions to make this patch successfully run until the end. Currently this does not handle lowering of intrinsics related to LSDA info generation (`wasm.landingpad.index` and `wasm.lsda`), because they cannot be tested without implementing `EHStreamer`'s wasm-specific handlers. They are marked as TODO, which is needed to make isel pass. Also this does not generate `try` and `end_try` markers yet, which will be handled in later patches. This patch is based on the first wasm EH proposal. (https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md) Reviewers: dschuff, majnemer Subscribers: jfb, sbc100, jgravelle-google, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D44090 llvm-svn: 333705
2018-06-01 06:25:54 +08:00
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -exception-model=wasm | FileCheck %s
[WebAssembly] Add support for exception handling instructions Summary: This adds backend support for throw, rethrow, try, and try_end instructions. This needs the corresponding clang builtin support: https://reviews.llvm.org/D34783 This follows the Wasm exception handling proposal in https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md Reviewers: sunfish, dschuff Reviewed By: dschuff Subscribers: jfb, sbc100, jgravelle-google Differential Revision: https://reviews.llvm.org/D34826 llvm-svn: 306774
2017-06-30 08:43:15 +08:00
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
[WebAsembly] Update default triple in test files to wasm32-unknown-unkown. Summary: The final -wasm component has been the default for some time now. Subscribers: jfb, dschuff, jgravelle-google, eraman, aheejin, JDevlieghere, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D46342 llvm-svn: 332007
2018-05-11 01:49:11 +08:00
target triple = "wasm32-unknown-unknown"
[WebAssembly] Add support for exception handling instructions Summary: This adds backend support for throw, rethrow, try, and try_end instructions. This needs the corresponding clang builtin support: https://reviews.llvm.org/D34783 This follows the Wasm exception handling proposal in https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md Reviewers: sunfish, dschuff Reviewed By: dschuff Subscribers: jfb, sbc100, jgravelle-google Differential Revision: https://reviews.llvm.org/D34826 llvm-svn: 306774
2017-06-30 08:43:15 +08:00
[WebAssembly] Support instruction selection for catching exceptions Summary: This lowers exception catching-related instructions: 1. Lowers `wasm.catch` intrinsic to `catch` instruction 2. Removes `catchpad` and `cleanuppad` instructions; they are not necessary after isel phase. (`MachineBasicBlock::isEHFuncletEntry()` or `MachineBasicBlock::isEHPad()` can be used instead.) 3. Lowers `catchret` and `cleanupret` instructions to pseudo `catchret` and `cleanupret` instructions in isel, which will be replaced with other instructions in `WebAssemblyExceptionPrepare` pass. 4. Adds 'WebAssemblyExceptionPrepare` pass, which is for running various transformation for EH. Currently this pass only replaces `catchret` and `cleanupret` instructions into appropriate wasm instructions to make this patch successfully run until the end. Currently this does not handle lowering of intrinsics related to LSDA info generation (`wasm.landingpad.index` and `wasm.lsda`), because they cannot be tested without implementing `EHStreamer`'s wasm-specific handlers. They are marked as TODO, which is needed to make isel pass. Also this does not generate `try` and `end_try` markers yet, which will be handled in later patches. This patch is based on the first wasm EH proposal. (https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md) Reviewers: dschuff, majnemer Subscribers: jfb, sbc100, jgravelle-google, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D44090 llvm-svn: 333705
2018-06-01 06:25:54 +08:00
%struct.Cleanup = type { i8 }
@_ZTIi = external constant i8*
[WebAssembly] Add support for exception handling instructions Summary: This adds backend support for throw, rethrow, try, and try_end instructions. This needs the corresponding clang builtin support: https://reviews.llvm.org/D34783 This follows the Wasm exception handling proposal in https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md Reviewers: sunfish, dschuff Reviewed By: dschuff Subscribers: jfb, sbc100, jgravelle-google Differential Revision: https://reviews.llvm.org/D34826 llvm-svn: 306774
2017-06-30 08:43:15 +08:00
declare void @llvm.wasm.throw(i32, i8*)
[WebAssembly] Support instruction selection for catching exceptions Summary: This lowers exception catching-related instructions: 1. Lowers `wasm.catch` intrinsic to `catch` instruction 2. Removes `catchpad` and `cleanuppad` instructions; they are not necessary after isel phase. (`MachineBasicBlock::isEHFuncletEntry()` or `MachineBasicBlock::isEHPad()` can be used instead.) 3. Lowers `catchret` and `cleanupret` instructions to pseudo `catchret` and `cleanupret` instructions in isel, which will be replaced with other instructions in `WebAssemblyExceptionPrepare` pass. 4. Adds 'WebAssemblyExceptionPrepare` pass, which is for running various transformation for EH. Currently this pass only replaces `catchret` and `cleanupret` instructions into appropriate wasm instructions to make this patch successfully run until the end. Currently this does not handle lowering of intrinsics related to LSDA info generation (`wasm.landingpad.index` and `wasm.lsda`), because they cannot be tested without implementing `EHStreamer`'s wasm-specific handlers. They are marked as TODO, which is needed to make isel pass. Also this does not generate `try` and `end_try` markers yet, which will be handled in later patches. This patch is based on the first wasm EH proposal. (https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md) Reviewers: dschuff, majnemer Subscribers: jfb, sbc100, jgravelle-google, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D44090 llvm-svn: 333705
2018-06-01 06:25:54 +08:00
; CHECK-LABEL: test_throw:
[WebAssembly] Add support for exception handling instructions Summary: This adds backend support for throw, rethrow, try, and try_end instructions. This needs the corresponding clang builtin support: https://reviews.llvm.org/D34783 This follows the Wasm exception handling proposal in https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md Reviewers: sunfish, dschuff Reviewed By: dschuff Subscribers: jfb, sbc100, jgravelle-google Differential Revision: https://reviews.llvm.org/D34826 llvm-svn: 306774
2017-06-30 08:43:15 +08:00
; CHECK-NEXT: i32.const $push0=, 0
; CHECK-NEXT: throw 0, $pop0
[WebAssembly] Support instruction selection for catching exceptions Summary: This lowers exception catching-related instructions: 1. Lowers `wasm.catch` intrinsic to `catch` instruction 2. Removes `catchpad` and `cleanuppad` instructions; they are not necessary after isel phase. (`MachineBasicBlock::isEHFuncletEntry()` or `MachineBasicBlock::isEHPad()` can be used instead.) 3. Lowers `catchret` and `cleanupret` instructions to pseudo `catchret` and `cleanupret` instructions in isel, which will be replaced with other instructions in `WebAssemblyExceptionPrepare` pass. 4. Adds 'WebAssemblyExceptionPrepare` pass, which is for running various transformation for EH. Currently this pass only replaces `catchret` and `cleanupret` instructions into appropriate wasm instructions to make this patch successfully run until the end. Currently this does not handle lowering of intrinsics related to LSDA info generation (`wasm.landingpad.index` and `wasm.lsda`), because they cannot be tested without implementing `EHStreamer`'s wasm-specific handlers. They are marked as TODO, which is needed to make isel pass. Also this does not generate `try` and `end_try` markers yet, which will be handled in later patches. This patch is based on the first wasm EH proposal. (https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md) Reviewers: dschuff, majnemer Subscribers: jfb, sbc100, jgravelle-google, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D44090 llvm-svn: 333705
2018-06-01 06:25:54 +08:00
define void @test_throw() {
[WebAssembly] Add support for exception handling instructions Summary: This adds backend support for throw, rethrow, try, and try_end instructions. This needs the corresponding clang builtin support: https://reviews.llvm.org/D34783 This follows the Wasm exception handling proposal in https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md Reviewers: sunfish, dschuff Reviewed By: dschuff Subscribers: jfb, sbc100, jgravelle-google Differential Revision: https://reviews.llvm.org/D34826 llvm-svn: 306774
2017-06-30 08:43:15 +08:00
call void @llvm.wasm.throw(i32 0, i8* null)
ret void
}
[WebAssembly] Support instruction selection for catching exceptions Summary: This lowers exception catching-related instructions: 1. Lowers `wasm.catch` intrinsic to `catch` instruction 2. Removes `catchpad` and `cleanuppad` instructions; they are not necessary after isel phase. (`MachineBasicBlock::isEHFuncletEntry()` or `MachineBasicBlock::isEHPad()` can be used instead.) 3. Lowers `catchret` and `cleanupret` instructions to pseudo `catchret` and `cleanupret` instructions in isel, which will be replaced with other instructions in `WebAssemblyExceptionPrepare` pass. 4. Adds 'WebAssemblyExceptionPrepare` pass, which is for running various transformation for EH. Currently this pass only replaces `catchret` and `cleanupret` instructions into appropriate wasm instructions to make this patch successfully run until the end. Currently this does not handle lowering of intrinsics related to LSDA info generation (`wasm.landingpad.index` and `wasm.lsda`), because they cannot be tested without implementing `EHStreamer`'s wasm-specific handlers. They are marked as TODO, which is needed to make isel pass. Also this does not generate `try` and `end_try` markers yet, which will be handled in later patches. This patch is based on the first wasm EH proposal. (https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md) Reviewers: dschuff, majnemer Subscribers: jfb, sbc100, jgravelle-google, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D44090 llvm-svn: 333705
2018-06-01 06:25:54 +08:00
; CHECK-LABEL: test_catch:
; 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
define void @test_catch() 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
[WebAssembly] Add support for exception handling instructions Summary: This adds backend support for throw, rethrow, try, and try_end instructions. This needs the corresponding clang builtin support: https://reviews.llvm.org/D34783 This follows the Wasm exception handling proposal in https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md Reviewers: sunfish, dschuff Reviewed By: dschuff Subscribers: jfb, sbc100, jgravelle-google Differential Revision: https://reviews.llvm.org/D34826 llvm-svn: 306774
2017-06-30 08:43:15 +08:00
ret void
}
[WebAssembly] Support instruction selection for catching exceptions Summary: This lowers exception catching-related instructions: 1. Lowers `wasm.catch` intrinsic to `catch` instruction 2. Removes `catchpad` and `cleanuppad` instructions; they are not necessary after isel phase. (`MachineBasicBlock::isEHFuncletEntry()` or `MachineBasicBlock::isEHPad()` can be used instead.) 3. Lowers `catchret` and `cleanupret` instructions to pseudo `catchret` and `cleanupret` instructions in isel, which will be replaced with other instructions in `WebAssemblyExceptionPrepare` pass. 4. Adds 'WebAssemblyExceptionPrepare` pass, which is for running various transformation for EH. Currently this pass only replaces `catchret` and `cleanupret` instructions into appropriate wasm instructions to make this patch successfully run until the end. Currently this does not handle lowering of intrinsics related to LSDA info generation (`wasm.landingpad.index` and `wasm.lsda`), because they cannot be tested without implementing `EHStreamer`'s wasm-specific handlers. They are marked as TODO, which is needed to make isel pass. Also this does not generate `try` and `end_try` markers yet, which will be handled in later patches. This patch is based on the first wasm EH proposal. (https://github.com/WebAssembly/exception-handling/blob/master/proposals/Exceptions.md) Reviewers: dschuff, majnemer Subscribers: jfb, sbc100, jgravelle-google, sunfish, llvm-commits Differential Revision: https://reviews.llvm.org/D44090 llvm-svn: 333705
2018-06-01 06:25:54 +08:00
; CHECK-LABEL: test_cleanup:
; CHECK: call foo@FUNCTION
; CHECK: return
; CHECK: i32.call $push20=, _ZN7CleanupD1Ev@FUNCTION
; CHECK: rethrow 0
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
}
declare void @foo()
declare void @func(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 %struct.Cleanup* @_ZN7CleanupD1Ev(%struct.Cleanup* returned)