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