539b2e0654
`try_table`'s `catch` or `catch_ref`'s target block's return type should be `i64` and `(i64, exnref)` in case of wasm64.
597 lines
20 KiB
LLVM
597 lines
20 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -wasm-enable-eh -wasm-use-legacy-eh=false -exception-model=wasm -mattr=+exception-handling -verify-machineinstrs | FileCheck --implicit-check-not=ehgcr -allow-deprecated-dag-overlap %s
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; RUN: llc < %s -asm-verbose=false -wasm-enable-eh -wasm-use-legacy-eh=false -exception-model=wasm -mattr=+exception-handling -verify-machineinstrs -O0
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; RUN: llc < %s -wasm-enable-eh -wasm-use-legacy-eh=false -exception-model=wasm -mattr=+exception-handling
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; RUN: llc < %s -wasm-enable-eh -wasm-use-legacy-eh=false -exception-model=wasm -mattr=+exception-handling -filetype=obj
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; RUN: llc < %s -mtriple=wasm64-unknown-unknown -wasm-enable-eh -wasm-use-legacy-eh=false -exception-model=wasm -mattr=+exception-handling -verify-machineinstrs | FileCheck --implicit-check-not=ehgcr -allow-deprecated-dag-overlap %s --check-prefix=WASM64
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target triple = "wasm32-unknown-unknown"
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%struct.Temp = type { i8 }
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@_ZTIi = external dso_local constant ptr
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; CHECK: .tagtype __cpp_exception i32
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; CHECK-LABEL: throw:
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; CHECK: throw __cpp_exception
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; CHECK-NOT: unreachable
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define void @throw(ptr %p) {
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call void @llvm.wasm.throw(i32 0, ptr %p)
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ret void
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}
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; Simple test with a try-catch
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;
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; void foo();
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; void catch() {
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; try {
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; foo();
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; } catch (int) {
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; }
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; }
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; CHECK-LABEL: catch:
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; WASM64-LABEL: catch:
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; CHECK: global.get __stack_pointer
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; CHECK: local.set 0
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; CHECK: block
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; CHECK: block () -> (i32, exnref)
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; CHECK: try_table (catch_ref __cpp_exception 0)
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; WASM64: block () -> (i64, exnref)
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; CHECK: call foo
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; CHECK: br 2
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; CHECK: end_try_table
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; CHECK: unreachable
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; CHECK: end_block
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; CHECK: local.set 2
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; CHECK: local.get 0
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; CHECK: global.set __stack_pointer
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; CHECK: i32.store __wasm_lpad_context
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; CHECK: call _Unwind_CallPersonality
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; CHECK: block
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; CHECK: br_if 0
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; CHECK: call __cxa_begin_catch
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; CHECK: call __cxa_end_catch
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; CHECK: br 1
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; CHECK: end_block
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; CHECK: local.get 2
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; CHECK: throw_ref
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; CHECK: end_block
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define void @catch() personality ptr @__gxx_wasm_personality_v0 {
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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 [ptr @_ZTIi]
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%2 = call ptr @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(ptr @_ZTIi)
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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 ptr @__cxa_begin_catch(ptr %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 @llvm.wasm.rethrow() [ "funclet"(token %1) ]
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unreachable
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try.cont: ; preds = %catch, %entry
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ret void
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}
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; Destructor (cleanup) test
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;
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; void foo();
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; struct Temp {
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; ~Temp() {}
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; };
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; void cleanup() {
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; Temp t;
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; foo();
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; }
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; CHECK-LABEL: cleanup:
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; CHECK: block
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; CHECK: block exnref
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; CHECK: try_table (catch_all_ref 0)
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; CHECK: call foo
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; CHECK: br 2
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; CHECK: end_try_table
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; CHECK: end_block
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; CHECK: local.set 1
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; CHECK: global.set __stack_pointer
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; CHECK: call _ZN4TempD2Ev
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; CHECK: local.get 1
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; CHECK: throw_ref
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; CHECK: end_block
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; CHECK: call _ZN4TempD2Ev
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define void @cleanup() personality ptr @__gxx_wasm_personality_v0 {
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entry:
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%t = alloca %struct.Temp, 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 ptr @_ZN4TempD2Ev(ptr %t)
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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 ptr @_ZN4TempD2Ev(ptr %t) [ "funclet"(token %0) ]
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cleanupret from %0 unwind to caller
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}
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; Calling a function that may throw within a 'catch (...)' generates a
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; terminatepad, because __cxa_end_catch() also can throw within 'catch (...)'.
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;
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; void foo();
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; void terminatepad() {
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; try {
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; foo();
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; } catch (...) {
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; foo();
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; }
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; }
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; CHECK-LABEL: terminatepad
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; WASM64-LABEL: terminatepad
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; CHECK: block
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; CHECK: block i32
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; WASM64: block i64
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; CHECK: try_table (catch __cpp_exception 0)
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; CHECK: call foo
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; CHECK: br 2
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; CHECK: end_try_table
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; CHECK: end_block
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; CHECK: call __cxa_begin_catch
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; CHECK: block
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; CHECK: block exnref
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; CHECK: try_table (catch_all_ref 0)
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; CHECK: call foo
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; CHECK: br 2
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; CHECK: end_try_table
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; CHECK: end_block
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; CHECK: local.set 2
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; CHECK: block
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; CHECK: block
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; CHECK: try_table (catch_all 0)
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; CHECK: call __cxa_end_catch
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; CHECK: br 2
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; CHECK: end_try_table
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; CHECK: end_block
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; CHECK: call _ZSt9terminatev
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; CHECK: unreachable
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; CHECK: end_block
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; CHECK: local.get 2
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; CHECK: throw_ref
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; CHECK: end_block
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; CHECK: call __cxa_end_catch
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; CHECK: end_block
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define void @terminatepad() personality ptr @__gxx_wasm_personality_v0 {
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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 [ptr null]
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%2 = call ptr @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 ptr @__cxa_begin_catch(ptr %2) [ "funclet"(token %1) ]
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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.start
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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 = %invoke.cont1, %entry
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ret void
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ehcleanup: ; preds = %catch.start
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%5 = cleanuppad within %1 []
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invoke void @__cxa_end_catch() [ "funclet"(token %5) ]
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to label %invoke.cont2 unwind label %terminate
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invoke.cont2: ; preds = %ehcleanup
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cleanupret from %5 unwind to caller
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terminate: ; preds = %ehcleanup
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%6 = cleanuppad within %5 []
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call void @_ZSt9terminatev() [ "funclet"(token %6) ]
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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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;
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; void bar(int) noexcept;
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; void no_prolog_epilog_in_ehpad() {
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; int stack_var = 0;
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; bar(stack_var);
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; try {
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; foo();
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; } catch (int) {
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; foo();
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; }
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; }
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; CHECK-LABEL: no_prolog_epilog_in_ehpad
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; CHECK: call bar
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; CHECK: block
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; CHECK: block () -> (i32, exnref)
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; CHECK: try_table (catch_ref __cpp_exception 0)
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; CHECK: call foo
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; CHECK: br 2
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; CHECK: end_try_table
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; CHECK: end_block
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; CHECK: local.set 2
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; CHECK-NOT: global.get __stack_pointer
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; CHECK: global.set __stack_pointer
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; CHECK: block
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; CHECK: block
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; CHECK: br_if 0
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; CHECK: call __cxa_begin_catch
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; CHECK: block exnref
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; CHECK: try_table (catch_all_ref 0)
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; CHECK: call foo
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; CHECK: br 3
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; CHECK: end_try_table
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; CHECK: end_block
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; CHECK: local.set 2
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; CHECK-NOT: global.get __stack_pointer
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; CHECK: global.set __stack_pointer
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; CHECK: call __cxa_end_catch
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; CHECK: local.get 2
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; CHECK: throw_ref
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; CHECK-NOT: global.set __stack_pointer
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; CHECK: end_block
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; CHECK: local.get 2
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; CHECK: throw_ref
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; CHECK: end_block
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; CHECK-NOT: global.set __stack_pointer
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; CHECK: call __cxa_end_catch
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; CHECK: end_block
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define void @no_prolog_epilog_in_ehpad() personality ptr @__gxx_wasm_personality_v0 {
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entry:
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%stack_var = alloca i32, align 4
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call void @bar(ptr %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 [ptr @_ZTIi]
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%2 = call ptr @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(ptr @_ZTIi)
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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 ptr @__cxa_begin_catch(ptr %2) [ "funclet"(token %1) ]
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%6 = load float, ptr %5, 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 @llvm.wasm.rethrow() [ "funclet"(token %1) ]
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unreachable
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try.cont: ; preds = %invoke.cont1, %entry
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ret void
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ehcleanup: ; preds = %catch
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%7 = cleanuppad within %1 []
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call void @__cxa_end_catch() [ "funclet"(token %7) ]
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cleanupret from %7 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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;
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; void foo();
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; void no_sp_writeback() {
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; try {
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; foo();
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; } catch (...) {
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; }
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; }
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; CHECK-LABEL: no_sp_writeback
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; CHECK: block
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; CHECK: block i32
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; CHECK: try_table (catch __cpp_exception 0)
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; CHECK: call foo
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; CHECK: br 2
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; CHECK: end_try_table
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; CHECK: end_block
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; CHECK: call __cxa_begin_catch
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; CHECK: call __cxa_end_catch
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; CHECK: end_block
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; CHECK-NOT: global.set __stack_pointer
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; CHECK: end_function
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define void @no_sp_writeback() personality ptr @__gxx_wasm_personality_v0 {
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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 [ptr null]
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%2 = call ptr @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 ptr @__cxa_begin_catch(ptr %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 = %catch.start, %entry
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ret void
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}
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; When the result of @llvm.wasm.get.exception is not used. This is created to
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; fix a bug in LateEHPrepare and this should not crash.
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define void @get_exception_wo_use() personality ptr @__gxx_wasm_personality_v0 {
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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 [ptr null]
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%2 = call ptr @llvm.wasm.get.exception(token %1)
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%3 = call i32 @llvm.wasm.get.ehselector(token %1)
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catchret from %1 to label %try.cont
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try.cont: ; preds = %catch.start, %entry
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ret void
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}
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; Tests a case when a cleanup region (cleanuppad ~ clanupret) contains another
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; catchpad
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define void @complex_cleanup_region() personality ptr @__gxx_wasm_personality_v0 {
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entry:
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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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ret void
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ehcleanup: ; preds = %entry
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%0 = cleanuppad within none []
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invoke void @foo() [ "funclet"(token %0) ]
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to label %ehcleanupret unwind label %catch.dispatch
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catch.dispatch: ; preds = %ehcleanup
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%1 = catchswitch within %0 [label %catch.start] unwind label %ehcleanup.1
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catch.start: ; preds = %catch.dispatch
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%2 = catchpad within %1 [ptr null]
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%3 = call ptr @llvm.wasm.get.exception(token %2)
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%4 = call i32 @llvm.wasm.get.ehselector(token %2)
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catchret from %2 to label %ehcleanupret
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ehcleanup.1: ; preds = %catch.dispatch
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%5 = cleanuppad within %0 []
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unreachable
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ehcleanupret: ; preds = %catch.start, %ehcleanup
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cleanupret from %0 unwind to caller
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}
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; Regression test for the bug that 'rethrow' was not treated correctly as a
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; terminator in isel.
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define void @rethrow_terminator() personality ptr @__gxx_wasm_personality_v0 {
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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 label %ehcleanup
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catch.start: ; preds = %catch.dispatch
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%1 = catchpad within %0 [ptr @_ZTIi]
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%2 = call ptr @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.p0(ptr @_ZTIi)
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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 ptr @__cxa_begin_catch(ptr %2) [ "funclet"(token %1) ]
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%6 = load i32, ptr %5, align 4
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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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invoke void @llvm.wasm.rethrow() #1 [ "funclet"(token %1) ]
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to label %unreachable unwind label %ehcleanup
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try.cont: ; preds = %entry, %catch
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ret void
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ehcleanup: ; preds = %rethrow, %catch.dispatch
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; 'rethrow' BB is this BB's predecessor, and its
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; 'invoke void @llvm.wasm.rethrow()' is lowered down to a 'RETHROW' in Wasm
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; MIR. And this 'phi' creates 'CONST_I32' instruction in the predecessor
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; 'rethrow' BB. If 'RETHROW' is not treated correctly as a terminator, it can
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; create a BB like
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; bb.3.rethrow:
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; RETHROW 0
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; %0 = CONST_I32 20
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; BR ...
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%tmp = phi i32 [ 10, %catch.dispatch ], [ 20, %rethrow ]
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%7 = cleanuppad within none []
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call void @take_i32(i32 %tmp) [ "funclet"(token %7) ]
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cleanupret from %7 unwind to caller
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unreachable: ; preds = %rethrow
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unreachable
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}
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; The bitcode below is generated when the code below is compiled and
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; Temp::~Temp() is inlined into inlined_cleanupret():
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;
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; void inlined_cleanupret() {
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; try {
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; Temp t;
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; throw 2;
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; } catch (...)
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; }
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;
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; Temp::~Temp() {
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; try {
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; throw 1;
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; } catch (...) {
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; }
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; }
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;
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; ~Temp() generates cleanupret, which is lowered to a 'throw_ref' later. That
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; throw_ref's argument should correctly target the top-level cleanuppad
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; (catch_all_ref). This is a regression test for the bug where we did not
|
|
; compute throw_ref's argument correctly.
|
|
|
|
; CHECK-LABEL: inlined_cleanupret:
|
|
; CHECK: block exnref
|
|
; CHECK: block
|
|
; CHECK: block exnref
|
|
; CHECK: try_table (catch_all_ref 0)
|
|
; CHECK: call __cxa_throw
|
|
; CHECK: end_try_table
|
|
; CHECK: end_block
|
|
; try_table (catch_all_ref 0)'s caught exception is stored in local 2
|
|
; CHECK: local.set 2
|
|
; CHECK: block
|
|
; CHECK: try_table (catch_all 0)
|
|
; CHECK: block
|
|
; CHECK: block i32
|
|
; CHECK: try_table (catch __cpp_exception 0)
|
|
; CHECK: call __cxa_throw
|
|
; CHECK: end_try_table
|
|
; CHECK: end_block
|
|
; CHECK: call __cxa_end_catch
|
|
; CHECK: block i32
|
|
; CHECK: try_table (catch_all_ref 5)
|
|
; CHECK: try_table (catch __cpp_exception 1)
|
|
; Note that the throw_ref below targets the top-level catch_all_ref (local 2)
|
|
; CHECK: local.get 2
|
|
; CHECK: throw_ref
|
|
; CHECK: end_try_table
|
|
; CHECK: end_try_table
|
|
; CHECK: end_block
|
|
; CHECK: try_table (catch_all_ref 4)
|
|
; CHECK: call __cxa_end_catch
|
|
; CHECK: end_try_table
|
|
; CHECK: return
|
|
; CHECK: end_block
|
|
; CHECK: end_try_table
|
|
; CHECK: end_block
|
|
; CHECK: call _ZSt9terminatev
|
|
; CHECK: end_block
|
|
; CHECK: end_block
|
|
; CHECK: throw_ref
|
|
define void @inlined_cleanupret() personality ptr @__gxx_wasm_personality_v0 {
|
|
entry:
|
|
%exception = tail call ptr @__cxa_allocate_exception(i32 4)
|
|
store i32 2, ptr %exception, align 16
|
|
invoke void @__cxa_throw(ptr nonnull %exception, ptr nonnull @_ZTIi, ptr null)
|
|
to label %unreachable unwind label %ehcleanup
|
|
|
|
ehcleanup: ; preds = %entry
|
|
%0 = cleanuppad within none []
|
|
%exception.i = call ptr @__cxa_allocate_exception(i32 4) [ "funclet"(token %0) ]
|
|
store i32 1, ptr %exception.i, align 16
|
|
invoke void @__cxa_throw(ptr nonnull %exception.i, ptr nonnull @_ZTIi, ptr null) [ "funclet"(token %0) ]
|
|
to label %unreachable unwind label %catch.dispatch.i
|
|
|
|
catch.dispatch.i: ; preds = %ehcleanup
|
|
%1 = catchswitch within %0 [label %catch.start.i] unwind label %terminate.i
|
|
|
|
catch.start.i: ; preds = %catch.dispatch.i
|
|
%2 = catchpad within %1 [ptr null]
|
|
%3 = tail call ptr @llvm.wasm.get.exception(token %2)
|
|
%4 = tail call i32 @llvm.wasm.get.ehselector(token %2)
|
|
%5 = call ptr @__cxa_begin_catch(ptr %3) [ "funclet"(token %2) ]
|
|
invoke void @__cxa_end_catch() [ "funclet"(token %2) ]
|
|
to label %invoke.cont.i unwind label %terminate.i
|
|
|
|
invoke.cont.i: ; preds = %catch.start.i
|
|
catchret from %2 to label %_ZN4TempD2Ev.exit
|
|
|
|
terminate.i: ; preds = %catch.start.i, %catch.dispatch.i
|
|
%6 = cleanuppad within %0 []
|
|
call void @_ZSt9terminatev() [ "funclet"(token %6) ]
|
|
unreachable
|
|
|
|
_ZN4TempD2Ev.exit: ; preds = %invoke.cont.i
|
|
cleanupret from %0 unwind label %catch.dispatch
|
|
|
|
catch.dispatch: ; preds = %_ZN4TempD2Ev.exit
|
|
%7 = catchswitch within none [label %catch.start] unwind to caller
|
|
|
|
catch.start: ; preds = %catch.dispatch
|
|
%8 = catchpad within %7 [ptr null]
|
|
%9 = tail call ptr @llvm.wasm.get.exception(token %8)
|
|
%10 = tail call i32 @llvm.wasm.get.ehselector(token %8)
|
|
%11 = call ptr @__cxa_begin_catch(ptr %9) #8 [ "funclet"(token %8) ]
|
|
call void @__cxa_end_catch() [ "funclet"(token %8) ]
|
|
catchret from %8 to label %try.cont
|
|
|
|
try.cont: ; preds = %catch.start
|
|
ret void
|
|
|
|
unreachable: ; preds = %entry
|
|
unreachable
|
|
}
|
|
|
|
|
|
declare void @foo()
|
|
declare void @bar(ptr)
|
|
declare void @take_i32(i32)
|
|
declare i32 @__gxx_wasm_personality_v0(...)
|
|
; Function Attrs: noreturn
|
|
declare void @llvm.wasm.throw(i32, ptr) #1
|
|
; Function Attrs: nounwind
|
|
declare ptr @llvm.wasm.get.exception(token) #0
|
|
; Function Attrs: nounwind
|
|
declare i32 @llvm.wasm.get.ehselector(token) #0
|
|
; Function Attrs: noreturn
|
|
declare void @llvm.wasm.rethrow() #1
|
|
; Function Attrs: nounwind
|
|
declare i32 @llvm.eh.typeid.for(ptr) #0
|
|
; Function Attrs: nounwind
|
|
declare ptr @__cxa_allocate_exception(i32) #0
|
|
declare ptr @__cxa_begin_catch(ptr)
|
|
declare void @__cxa_end_catch()
|
|
; Function Attrs: noreturn
|
|
declare void @__cxa_throw(ptr, ptr, ptr) #1
|
|
declare void @_ZSt9terminatev()
|
|
declare ptr @_ZN4TempD2Ev(ptr returned)
|
|
|
|
attributes #0 = { nounwind }
|
|
attributes #1 = { noreturn }
|
|
|
|
; CHECK: __cpp_exception:
|