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|
; RUN: llc < %s --mtriple=wasm32-unknown-unknown -wasm-disable-explicit-locals -wasm-keep-registers -wasm-enable-eh -exception-model=wasm -mattr=+exception-handling | FileCheck %s -check-prefixes=CHECK,NOPIC -DPTR=32
; RUN: llc < %s --mtriple=wasm64-unknown-unknown -wasm-disable-explicit-locals -wasm-keep-registers -wasm-enable-eh -exception-model=wasm -mattr=+exception-handling | FileCheck %s -check-prefixes=CHECK,NOPIC -DPTR=64
; RUN: llc < %s --mtriple=wasm32-unknown-emscripten -wasm-disable-explicit-locals -wasm-keep-registers -wasm-enable-eh -exception-model=wasm -mattr=+exception-handling | FileCheck %s -check-prefixes=CHECK,NOPIC -DPTR=32
; RUN: llc < %s --mtriple=wasm64-unknown-emscripten -wasm-disable-explicit-locals -wasm-keep-registers -wasm-enable-eh -exception-model=wasm -mattr=+exception-handling | FileCheck %s -check-prefixes=CHECK,NOPIC -DPTR=64
; RUN: llc < %s --mtriple=wasm32-unknown-emscripten -wasm-disable-explicit-locals -wasm-keep-registers -wasm-enable-eh -exception-model=wasm -mattr=+exception-handling -relocation-model=pic | FileCheck %s -check-prefixes=CHECK,PIC -DPTR=32
; RUN: llc < %s --mtriple=wasm64-unknown-emscripten -wasm-disable-explicit-locals -wasm-keep-registers -wasm-enable-eh -exception-model=wasm -mattr=+exception-handling -relocation-model=pic | FileCheck %s -check-prefixes=CHECK,PIC -DPTR=64
@_ZTIi = external constant ptr
@_ZTIf = external constant ptr
@_ZTId = external constant ptr
; Single catch (...) does not need an exception table.
;
; try {
; may_throw();
; } catch (...) {
; }
; CHECK-LABEL: test0:
; CHECK-NOT: GCC_except_table
define void @test0() personality ptr @__gxx_wasm_personality_v0 {
entry:
invoke void @may_throw()
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
try.cont: ; preds = %entry, %catch.start
ret void
}
; Exception table generation + shared action test.
;
; try {
; may_throw();
; } catch (int) {
; } catch (float) {
; } catch (double) {
; } catch (...) {
; }
;
; try {
; may_throw();
; } catch (double) {
; } catch (...) {
; }
;
; try {
; may_throw();
; } catch (int) {
; } catch (float) {
; }
;
; There are three landing pads. The second landing pad should share action table
; entries with the first landing pad because they end with the same sequence
; (double -> ...). But the third landing table cannot share action table entries
; with others, so it should create its own entries.
; CHECK-LABEL: test1:
; In static linking, we load GCC_except_table as a constant directly.
; NOPIC: i[[PTR]].const $push[[CONTEXT:.*]]=, __wasm_lpad_context
; NOPIC-NEXT: i[[PTR]].const $push[[EXCEPT_TABLE:.*]]=, GCC_except_table1
; NOPIC-NEXT: i[[PTR]].store {{[48]}}($pop[[CONTEXT]]), $pop[[EXCEPT_TABLE]]
; In case of PIC, we make GCC_except_table symbols a relative on based on
; __memory_base.
; PIC: global.get $push[[CONTEXT:.*]]=, __wasm_lpad_context@GOT
; PIC-NEXT: local.tee $push{{.*}}=, $[[CONTEXT_LOCAL:.*]]=, $pop[[CONTEXT]]
; PIC: global.get $push[[MEMORY_BASE:.*]]=, __memory_base
; PIC-NEXT: i[[PTR]].const $push[[EXCEPT_TABLE_REL:.*]]=, GCC_except_table1@MBREL
; PIC-NEXT: i[[PTR]].add $push[[EXCEPT_TABLE:.*]]=, $pop[[MEMORY_BASE]], $pop[[EXCEPT_TABLE_REL]]
; PIC-NEXT: i[[PTR]].store {{[48]}}($[[CONTEXT_LOCAL]]), $pop[[EXCEPT_TABLE]]
; CHECK: .section .rodata.gcc_except_table,"",@
; CHECK-NEXT: .p2align 2
; CHECK-NEXT: GCC_except_table[[START:[0-9]+]]:
; CHECK-NEXT: .Lexception0:
; CHECK-NEXT: .int8 255 # @LPStart Encoding = omit
; CHECK-NEXT: .int8 0 # @TType Encoding = absptr
; CHECK-NEXT: .uleb128 .Lttbase0-.Lttbaseref0
; CHECK-NEXT: .Lttbaseref0:
; CHECK-NEXT: .int8 1 # Call site Encoding = uleb128
; CHECK-NEXT: .uleb128 .Lcst_end0-.Lcst_begin0
; CHECK-NEXT: .Lcst_begin0:
; CHECK-NEXT: .int8 0 # >> Call Site 0 <<
; CHECK-NEXT: # On exception at call site 0
; CHECK-NEXT: .int8 7 # Action: 4
; CHECK-NEXT: .int8 1 # >> Call Site 1 <<
; CHECK-NEXT: # On exception at call site 1
; CHECK-NEXT: .int8 3 # Action: 2
; CHECK-NEXT: .int8 2 # >> Call Site 2 <<
; CHECK-NEXT: # On exception at call site 2
; CHECK-NEXT: .int8 11 # Action: 6
; CHECK-NEXT: .Lcst_end0:
; CHECK-NEXT: .int8 1 # >> Action Record 1 <<
; CHECK-NEXT: # Catch TypeInfo 1
; CHECK-NEXT: .int8 0 # No further actions
; CHECK-NEXT: .int8 2 # >> Action Record 2 <<
; CHECK-NEXT: # Catch TypeInfo 2
; CHECK-NEXT: .int8 125 # Continue to action 1
; CHECK-NEXT: .int8 3 # >> Action Record 3 <<
; CHECK-NEXT: # Catch TypeInfo 3
; CHECK-NEXT: .int8 125 # Continue to action 2
; CHECK-NEXT: .int8 4 # >> Action Record 4 <<
; CHECK-NEXT: # Catch TypeInfo 4
; CHECK-NEXT: .int8 125 # Continue to action 3
; CHECK-NEXT: .int8 3 # >> Action Record 5 <<
; CHECK-NEXT: # Catch TypeInfo 3
; CHECK-NEXT: .int8 0 # No further actions
; CHECK-NEXT: .int8 4 # >> Action Record 6 <<
; CHECK-NEXT: # Catch TypeInfo 4
; CHECK-NEXT: .int8 125 # Continue to action 5
; CHECK-NEXT: .p2align 2
; CHECK-NEXT: # >> Catch TypeInfos <<
; CHECK-NEXT: .int[[PTR]] _ZTIi # TypeInfo 4
; CHECK-NEXT: .int[[PTR]] _ZTIf # TypeInfo 3
; CHECK-NEXT: .int[[PTR]] _ZTId # TypeInfo 2
; CHECK-NEXT: .int[[PTR]] 0 # TypeInfo 1
; CHECK-NEXT: .Lttbase0:
; CHECK-NEXT: .p2align 2
; CHECK-NEXT: .LGCC_except_table_end[[END:[0-9]+]]:
; CHECK-NEXT: .size GCC_except_table[[START]], .LGCC_except_table_end[[END]]-GCC_except_table[[START]]
define void @test1() personality ptr @__gxx_wasm_personality_v0 {
entry:
invoke void @may_throw()
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, ptr @_ZTIf, ptr @_ZTId, ptr null]
%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 %catch10, label %catch.fallthrough
catch10: ; preds = %catch.start
%5 = call ptr @__cxa_begin_catch(ptr %2) [ "funclet"(token %1) ]
%6 = load i32, ptr %5, align 4
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
try.cont: ; preds = %entry, %catch, %catch4, %catch7, %catch10
invoke void @may_throw()
to label %try.cont23 unwind label %catch.dispatch14
catch.dispatch14: ; preds = %try.cont
%7 = catchswitch within none [label %catch.start15] unwind to caller
catch.start15: ; preds = %catch.dispatch14
%8 = catchpad within %7 [ptr @_ZTId, ptr null]
%9 = call ptr @llvm.wasm.get.exception(token %8)
%10 = call i32 @llvm.wasm.get.ehselector(token %8)
%11 = call i32 @llvm.eh.typeid.for(ptr @_ZTId)
%matches16 = icmp eq i32 %10, %11
%12 = call ptr @__cxa_begin_catch(ptr %9) [ "funclet"(token %8) ]
br i1 %matches16, label %catch20, label %catch17
catch20: ; preds = %catch.start15
%13 = load double, ptr %12, align 8
call void @__cxa_end_catch() [ "funclet"(token %8) ]
catchret from %8 to label %try.cont23
try.cont23: ; preds = %try.cont, %catch17, %catch20
invoke void @may_throw()
to label %try.cont36 unwind label %catch.dispatch25
catch.dispatch25: ; preds = %try.cont23
%14 = catchswitch within none [label %catch.start26] unwind to caller
catch.start26: ; preds = %catch.dispatch25
%15 = catchpad within %14 [ptr @_ZTIi, ptr @_ZTIf]
%16 = call ptr @llvm.wasm.get.exception(token %15)
%17 = call i32 @llvm.wasm.get.ehselector(token %15)
%18 = call i32 @llvm.eh.typeid.for(ptr @_ZTIi)
%matches27 = icmp eq i32 %17, %18
br i1 %matches27, label %catch33, label %catch.fallthrough28
catch33: ; preds = %catch.start26
%19 = call ptr @__cxa_begin_catch(ptr %16) [ "funclet"(token %15) ]
%20 = load i32, ptr %19, align 4
call void @__cxa_end_catch() [ "funclet"(token %15) ]
catchret from %15 to label %try.cont36
catch.fallthrough28: ; preds = %catch.start26
%21 = call i32 @llvm.eh.typeid.for(ptr @_ZTIf)
%matches29 = icmp eq i32 %17, %21
br i1 %matches29, label %catch30, label %rethrow
catch30: ; preds = %catch.fallthrough28
%22 = call ptr @__cxa_begin_catch(ptr %16) [ "funclet"(token %15) ]
%23 = load float, ptr %22, align 4
call void @__cxa_end_catch() [ "funclet"(token %15) ]
catchret from %15 to label %try.cont36
rethrow: ; preds = %catch.fallthrough28
call void @__cxa_rethrow() [ "funclet"(token %15) ]
unreachable
try.cont36: ; preds = %try.cont23, %catch30, %catch33
ret void
catch17: ; preds = %catch.start15
call void @__cxa_end_catch() [ "funclet"(token %8) ]
catchret from %8 to label %try.cont23
catch.fallthrough: ; preds = %catch.start
%24 = call i32 @llvm.eh.typeid.for(ptr @_ZTIf)
%matches1 = icmp eq i32 %3, %24
br i1 %matches1, label %catch7, label %catch.fallthrough2
catch7: ; preds = %catch.fallthrough
%25 = call ptr @__cxa_begin_catch(ptr %2) [ "funclet"(token %1) ]
%26 = load float, ptr %25, align 4
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
catch.fallthrough2: ; preds = %catch.fallthrough
%27 = call i32 @llvm.eh.typeid.for(ptr @_ZTId)
%matches3 = icmp eq i32 %3, %27
%28 = call ptr @__cxa_begin_catch(ptr %2) [ "funclet"(token %1) ]
br i1 %matches3, label %catch4, label %catch
catch4: ; preds = %catch.fallthrough2
%29 = load double, ptr %28, align 8
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
catch: ; preds = %catch.fallthrough2
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
}
declare void @may_throw()
; Function Attrs: nounwind
declare i32 @llvm.eh.typeid.for(ptr) #0
; Function Attrs: nounwind
declare ptr @llvm.wasm.get.exception(token) #0
; Function Attrs: nounwind
declare i32 @llvm.wasm.get.ehselector(token) #0
declare void @__cxa_rethrow()
declare ptr @__cxa_begin_catch(ptr)
declare void @__cxa_end_catch()
declare i32 @__gxx_wasm_personality_v0(...)
attributes #0 = { nounwind }
|
