761 lines
30 KiB
LLVM
761 lines
30 KiB
LLVM
; REQUIRES: asserts
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; RUN: llc < %s -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -disable-block-placement -verify-machineinstrs -fast-isel=false -machine-sink-split-probability-threshold=0 -cgp-freq-ratio-to-skip-merge=1000 -exception-model=wasm -mattr=+exception-handling | FileCheck %s
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; RUN: llc < %s -O0 -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -verify-machineinstrs -exception-model=wasm -mattr=+exception-handling | FileCheck %s --check-prefix=NOOPT
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; RUN: llc < %s -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -disable-block-placement -verify-machineinstrs -fast-isel=false -machine-sink-split-probability-threshold=0 -cgp-freq-ratio-to-skip-merge=1000 -exception-model=wasm -mattr=+exception-handling -wasm-disable-ehpad-sort | FileCheck %s --check-prefix=NOSORT
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; RUN: llc < %s -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -disable-block-placement -verify-machineinstrs -fast-isel=false -machine-sink-split-probability-threshold=0 -cgp-freq-ratio-to-skip-merge=1000 -exception-model=wasm -mattr=+exception-handling -wasm-disable-ehpad-sort -stats 2>&1 | FileCheck %s --check-prefix=NOSORT-STAT
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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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@_ZTIi = external constant i8*
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@_ZTId = external constant i8*
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; Simple test case with two catch clauses
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;
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; void foo();
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; void test0() {
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; try {
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; foo();
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; } catch (int) {
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; } catch (double) {
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; }
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; }
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; CHECK-LABEL: test0
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; CHECK: try
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; CHECK: call foo
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; CHECK: catch
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; CHECK: block
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; CHECK: br_if 0, {{.*}} # 0: down to label2
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; CHECK: call $drop=, __cxa_begin_catch
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; CHECK: call __cxa_end_catch
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; CHECK: br 1 # 1: down to label0
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; CHECK: end_block # label2:
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; CHECK: block
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; CHECK: br_if 0, {{.*}} # 0: down to label3
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; CHECK: call $drop=, __cxa_begin_catch
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; CHECK: call __cxa_end_catch
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; CHECK: br 1 # 1: down to label0
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; CHECK: end_block # label3:
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; CHECK: rethrow {{.*}} # to caller
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; CHECK: end_try # label0:
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define void @test0() 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*), i8* bitcast (i8** @_ZTId 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 %catch2, label %catch.fallthrough
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catch2: ; 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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catch.fallthrough: ; preds = %catch.start
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%6 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTId to i8*))
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%matches1 = icmp eq i32 %3, %6
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br i1 %matches1, label %catch, label %rethrow
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catch: ; preds = %catch.fallthrough
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%7 = 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.fallthrough
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call void @llvm.wasm.rethrow.in.catch() [ "funclet"(token %1) ]
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unreachable
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try.cont: ; preds = %catch, %catch2, %entry
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ret void
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}
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; Nested try-catches within a catch
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; void test1() {
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; try {
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; foo();
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; } catch (int) {
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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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; }
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; CHECK-LABEL: test1
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; CHECK: try
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; CHECK: call foo
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; CHECK: catch
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; CHECK: block
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; CHECK: block
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; CHECK: br_if 0, {{.*}} # 0: down to label7
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; CHECK: call $drop=, __cxa_begin_catch
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; CHECK: try
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; CHECK: call foo
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; CHECK: br 2 # 2: down to label6
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; CHECK: catch
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; CHECK: try
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; CHECK: block
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; CHECK: br_if 0, {{.*}} # 0: down to label11
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; CHECK: call $drop=, __cxa_begin_catch
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; CHECK: try
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; CHECK: call foo
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; CHECK: br 2 # 2: down to label9
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; CHECK: catch
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; CHECK: call __cxa_end_catch
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; CHECK: rethrow {{.*}} # down to catch3
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; CHECK: end_try
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; CHECK: end_block # label11:
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; CHECK: rethrow {{.*}} # down to catch3
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; CHECK: catch {{.*}} # catch3:
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; CHECK: call __cxa_end_catch
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; CHECK: rethrow {{.*}} # to caller
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; CHECK: end_try # label9:
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; CHECK: call __cxa_end_catch
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; CHECK: br 2 # 2: down to label6
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; CHECK: end_try
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; CHECK: end_block # label7:
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; CHECK: rethrow {{.*}} # to caller
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; CHECK: end_block # label6:
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; CHECK: call __cxa_end_catch
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; CHECK: end_try
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define void @test1() 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.cont11 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 i32*
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%7 = load i32, i32* %6, align 4
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invoke void @foo() [ "funclet"(token %1) ]
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to label %try.cont unwind label %catch.dispatch2
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catch.dispatch2: ; preds = %catch
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%8 = catchswitch within %1 [label %catch.start3] unwind label %ehcleanup9
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catch.start3: ; preds = %catch.dispatch2
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%9 = catchpad within %8 [i8* bitcast (i8** @_ZTIi to i8*)]
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%10 = call i8* @llvm.wasm.get.exception(token %9)
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%11 = call i32 @llvm.wasm.get.ehselector(token %9)
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%12 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
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%matches4 = icmp eq i32 %11, %12
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br i1 %matches4, label %catch6, label %rethrow5
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catch6: ; preds = %catch.start3
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%13 = call i8* @__cxa_begin_catch(i8* %10) [ "funclet"(token %9) ]
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%14 = bitcast i8* %13 to i32*
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%15 = load i32, i32* %14, align 4
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invoke void @foo() [ "funclet"(token %9) ]
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to label %invoke.cont8 unwind label %ehcleanup
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invoke.cont8: ; preds = %catch6
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call void @__cxa_end_catch() [ "funclet"(token %9) ]
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catchret from %9 to label %try.cont
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rethrow5: ; preds = %catch.start3
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invoke void @llvm.wasm.rethrow.in.catch() [ "funclet"(token %9) ]
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to label %unreachable unwind label %ehcleanup9
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try.cont: ; preds = %invoke.cont8, %catch
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call void @__cxa_end_catch() [ "funclet"(token %1) ]
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catchret from %1 to label %try.cont11
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rethrow: ; preds = %catch.start
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call void @llvm.wasm.rethrow.in.catch() [ "funclet"(token %1) ]
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unreachable
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try.cont11: ; preds = %try.cont, %entry
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ret void
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ehcleanup: ; preds = %catch6
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%16 = cleanuppad within %9 []
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call void @__cxa_end_catch() [ "funclet"(token %16) ]
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cleanupret from %16 unwind label %ehcleanup9
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ehcleanup9: ; preds = %ehcleanup, %rethrow5, %catch.dispatch2
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%17 = cleanuppad within %1 []
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call void @__cxa_end_catch() [ "funclet"(token %17) ]
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cleanupret from %17 unwind to caller
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unreachable: ; preds = %rethrow5
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unreachable
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}
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; Nested loop within a catch clause
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; void test2() {
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; try {
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; foo();
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; } catch (...) {
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; for (int i = 0; i < 50; i++)
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; foo();
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; }
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; }
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; CHECK-LABEL: test2
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; CHECK: try
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; CHECK: call foo
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; CHECK: catch
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; CHECK: call $drop=, __cxa_begin_catch
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; CHECK: loop # label15:
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; CHECK: block
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; CHECK: block
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; CHECK: br_if 0, {{.*}} # 0: down to label17
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; CHECK: try
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; CHECK: call foo
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; CHECK: br 2 # 2: down to label16
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; CHECK: catch
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; CHECK: try
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; CHECK: call __cxa_end_catch
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; CHECK: catch
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; CHECK: call __clang_call_terminate
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; CHECK: unreachable
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; CHECK: end_try
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; CHECK: rethrow {{.*}} # to caller
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; CHECK: end_try
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; CHECK: end_block # label17:
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; CHECK: call __cxa_end_catch
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; CHECK: br 2 # 2: down to label13
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; CHECK: end_block # label16:
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; CHECK: br 0 # 0: up to label15
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; CHECK: end_loop
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; CHECK: end_try # label13:
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define void @test2() 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) [ "funclet"(token %1) ]
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br label %for.cond
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for.cond: ; preds = %for.inc, %catch.start
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%i.0 = phi i32 [ 0, %catch.start ], [ %inc, %for.inc ]
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%cmp = icmp slt i32 %i.0, 50
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br i1 %cmp, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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invoke void @foo() [ "funclet"(token %1) ]
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to label %for.inc unwind label %ehcleanup
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for.inc: ; preds = %for.body
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%inc = add nsw i32 %i.0, 1
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br label %for.cond
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for.end: ; preds = %for.cond
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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 = %for.end, %entry
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ret void
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ehcleanup: ; preds = %for.body
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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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%7 = call i8* @llvm.wasm.get.exception(token %6)
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call void @__clang_call_terminate(i8* %7) [ "funclet"(token %6) ]
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unreachable
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}
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; Tests if block and try markers are correctly placed. Even if two predecessors
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; of the EH pad are bb2 and bb3 and their nearest common dominator is bb1, the
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; TRY marker should be placed at bb0 because there's a branch from bb0 to bb2,
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; and scopes cannot be interleaved.
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; NOOPT-LABEL: test3
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; NOOPT: try
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; NOOPT: block
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; NOOPT: block
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; NOOPT: block
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; NOOPT: end_block
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; NOOPT: end_block
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; NOOPT: call foo
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; NOOPT: end_block
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; NOOPT: call bar
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; NOOPT: catch {{.*}}
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; NOOPT: end_try
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define void @test3() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
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bb0:
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br i1 undef, label %bb1, label %bb2
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bb1: ; preds = %bb0
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br i1 undef, label %bb3, label %bb4
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bb2: ; preds = %bb0
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br label %try.cont
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bb3: ; preds = %bb1
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invoke void @foo()
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to label %try.cont unwind label %catch.dispatch
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bb4: ; preds = %bb1
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invoke void @bar()
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to label %try.cont unwind label %catch.dispatch
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catch.dispatch: ; preds = %bb4, %bb3
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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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catchret from %1 to label %try.cont
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try.cont: ; preds = %catch.start, %bb4, %bb3, %bb2
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ret void
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}
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; Tests if try/end_try markers are placed correctly wrt loop/end_loop markers,
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; when try and loop markers are in the same BB and end_try and end_loop are in
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; another BB.
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; CHECK: loop
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; CHECK: try
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; CHECK: call foo
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; CHECK: catch
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; CHECK: end_try
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; CHECK: end_loop
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define void @test4(i32* %p) personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
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entry:
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store volatile i32 0, i32* %p
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br label %loop
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loop: ; preds = %try.cont, %entry
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store volatile i32 1, i32* %p
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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 = %loop
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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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catchret from %1 to label %try.cont
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try.cont: ; preds = %catch.start, %loop
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br label %loop
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}
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; Some of test cases below are hand-tweaked by deleting some library calls to
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; simplify tests and changing the order of basic blocks to cause unwind
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; destination mismatches. And we use -wasm-disable-ehpad-sort to create maximum
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; number of mismatches in several tests below.
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; 'call bar''s original unwind destination was 'catch14', but after control flow
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; linearization, its unwind destination incorrectly becomes 'catch15'. We fix
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; this by wrapping the call with a nested try/catch/end_try and branching to the
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; right destination (label32).
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; NOSORT-LABEL: test5
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; NOSORT: block
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; NOSORT: try
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; NOSORT: try
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; NOSORT: call foo
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; --- Nested try/catch/end_try starts
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; NOSORT: try
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; NOSORT: call bar
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; NOSORT: catch $drop=
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; NOSORT: br 2 # 2: down to label32
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; NOSORT: end_try
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; --- Nested try/catch/end_try ends
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; NOSORT: br 2 # 2: down to label31
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; NOSORT: catch $drop= # catch15:
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; NOSORT: br 2 # 2: down to label31
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; NOSORT: end_try
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; NOSORT: catch $drop= # catch14:
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; NOSORT: end_try # label32:
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; NOSORT: end_block # label31:
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; NOSORT: return
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define void @test5() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
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bb0:
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invoke void @foo()
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to label %bb1 unwind label %catch.dispatch0
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bb1: ; preds = %bb0
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invoke void @bar()
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to label %try.cont unwind label %catch.dispatch1
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catch.dispatch0: ; preds = %bb0
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%0 = catchswitch within none [label %catch.start0] unwind to caller
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catch.start0: ; preds = %catch.dispatch0
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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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catchret from %1 to label %try.cont
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catch.dispatch1: ; preds = %bb1
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%4 = catchswitch within none [label %catch.start1] unwind to caller
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catch.start1: ; preds = %catch.dispatch1
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%5 = catchpad within %4 [i8* null]
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%6 = call i8* @llvm.wasm.get.exception(token %5)
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%7 = call i32 @llvm.wasm.get.ehselector(token %5)
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catchret from %5 to label %try.cont
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try.cont: ; preds = %catch.start1, %catch.start0, %bb1
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ret void
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}
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; Two 'call bar''s original unwind destination was the caller, but after control
|
|
; flow linearization, their unwind destination incorrectly becomes 'catch17'. We
|
|
; fix this by wrapping the call with a nested try/catch/end_try and branching to
|
|
; the right destination (label4), from which we rethrow the exception to the
|
|
; caller.
|
|
|
|
; And the return value of 'baz' should NOT be stackified because the BB is split
|
|
; during fixing unwind mismatches.
|
|
|
|
; NOSORT-LABEL: test6
|
|
; NOSORT: try
|
|
; NOSORT: call foo
|
|
; --- Nested try/catch/end_try starts
|
|
; NOSORT: try
|
|
; NOSORT: call bar
|
|
; NOSORT: call ${{[0-9]+}}=, baz
|
|
; NOSORT-NOT: call $push{{.*}}=, baz
|
|
; NOSORT: catch $[[REG:[0-9]+]]=
|
|
; NOSORT: br 1 # 1: down to label35
|
|
; NOSORT: end_try
|
|
; --- Nested try/catch/end_try ends
|
|
; NOSORT: return
|
|
; NOSORT: catch $drop= # catch17:
|
|
; NOSORT: return
|
|
; NOSORT: end_try # label35:
|
|
; NOSORT: rethrow $[[REG]] # to caller
|
|
|
|
define void @test6() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
|
|
bb0:
|
|
invoke void @foo()
|
|
to label %bb1 unwind label %catch.dispatch0
|
|
|
|
bb1: ; preds = %bb0
|
|
call void @bar()
|
|
%call = call i32 @baz()
|
|
call void @nothrow(i32 %call) #0
|
|
ret void
|
|
|
|
catch.dispatch0: ; preds = %bb0
|
|
%0 = catchswitch within none [label %catch.start0] unwind to caller
|
|
|
|
catch.start0: ; preds = %catch.dispatch0
|
|
%1 = catchpad within %0 [i8* null]
|
|
%2 = call i8* @llvm.wasm.get.exception(token %1)
|
|
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
|
|
catchret from %1 to label %try.cont
|
|
|
|
try.cont: ; preds = %catch.start0
|
|
ret void
|
|
}
|
|
|
|
; If not for the unwind destination mismatch, the LOOP marker here would have an
|
|
; i32 signature. But because we add a rethrow instruction at the end of the
|
|
; appendix block, now the LOOP marker does not have a signature (= has a void
|
|
; signature). Here the two calls two 'bar' are supposed to throw up to the
|
|
; caller, but incorrectly unwind to 'catch19' after linearizing the CFG.
|
|
|
|
; NOSORT-LABEL: test7
|
|
; NOSORT: block
|
|
; NOSORT-NOT: loop i32
|
|
; NOSORT: loop # label38:
|
|
; NOSORT: try
|
|
; NOSORT: call foo
|
|
; --- Nested try/catch/end_try starts
|
|
; NOSORT: try
|
|
; NOSORT: call bar
|
|
; NOSORT: call bar
|
|
; NOSORT: catch $[[REG:[0-9]+]]=
|
|
; NOSORT: br 1 # 1: down to label39
|
|
; NOSORT: end_try
|
|
; --- Nested try/catch/end_try ends
|
|
; NOSORT: return {{.*}}
|
|
; NOSORT: catch $drop= # catch19:
|
|
; NOSORT: br 1 # 1: up to label38
|
|
; NOSORT: end_try # label39:
|
|
; NOSORT: end_loop
|
|
; NOSORT: end_block
|
|
; NOSORT: rethrow $[[REG]] # to caller
|
|
|
|
define i32 @test7(i32* %p) personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
|
|
entry:
|
|
store volatile i32 0, i32* %p
|
|
br label %loop
|
|
|
|
loop: ; preds = %try.cont, %entry
|
|
store volatile i32 1, i32* %p
|
|
invoke void @foo()
|
|
to label %bb unwind label %catch.dispatch
|
|
|
|
bb: ; preds = %loop
|
|
call void @bar()
|
|
call void @bar()
|
|
ret i32 0
|
|
|
|
catch.dispatch: ; preds = %loop
|
|
%0 = catchswitch within none [label %catch.start] unwind to caller
|
|
|
|
catch.start: ; preds = %catch.dispatch
|
|
%1 = catchpad within %0 [i8* null]
|
|
%2 = call i8* @llvm.wasm.get.exception(token %1)
|
|
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
|
|
catchret from %1 to label %try.cont
|
|
|
|
try.cont: ; preds = %catch.start
|
|
br label %loop
|
|
}
|
|
|
|
; When we have both kinds of EH pad unwind mismatches:
|
|
; - A may-throw instruction unwinds to an incorrect EH pad after linearizing the
|
|
; CFG, when it is supposed to unwind to another EH pad.
|
|
; - A may-throw instruction unwinds to an incorrect EH pad after linearizing the
|
|
; CFG, when it is supposed to unwind to the caller.
|
|
|
|
; NOSORT-LABEL: test8
|
|
; NOSORT: block
|
|
; NOSORT: block
|
|
; NOSORT: try
|
|
; NOSORT: try
|
|
; NOSORT: call foo
|
|
; --- Nested try/catch/end_try starts
|
|
; NOSORT: try
|
|
; NOSORT: call bar
|
|
; NOSORT: catch $[[REG0:[0-9]+]]=
|
|
; NOSORT: br 2 # 2: down to label43
|
|
; NOSORT: end_try
|
|
; --- Nested try/catch/end_try ends
|
|
; NOSORT: br 2 # 2: down to label42
|
|
; NOSORT: catch {{.*}}
|
|
; NOSORT: block i32
|
|
; NOSORT: br_on_exn 0, {{.*}} # 0: down to label46
|
|
; --- Nested try/catch/end_try starts
|
|
; NOSORT: try
|
|
; NOSORT: rethrow {{.*}} # down to catch24
|
|
; NOSORT: catch $[[REG1:[0-9]+]]= # catch24:
|
|
; NOSORT: br 5 # 5: down to label41
|
|
; NOSORT: end_try
|
|
; --- Nested try/catch/end_try ends
|
|
; NOSORT: end_block # label46:
|
|
; NOSORT: call $drop=, __cxa_begin_catch
|
|
; --- Nested try/catch/end_try starts
|
|
; NOSORT: try
|
|
; NOSORT: call __cxa_end_catch
|
|
; NOSORT: catch $[[REG1]]=
|
|
; NOSORT: br 4 # 4: down to label41
|
|
; NOSORT: end_try
|
|
; --- Nested try/catch/end_try ends
|
|
; NOSORT: br 2 # 2: down to label42
|
|
; NOSORT: end_try
|
|
; NOSORT: catch $[[REG0]]=
|
|
; NOSORT: end_try # label43:
|
|
; NOSORT: call $drop=, __cxa_begin_catch
|
|
; NOSORT: call __cxa_end_catch
|
|
; NOSORT: end_block # label42:
|
|
; NOSORT: return
|
|
; NOSORT: end_block # label41:
|
|
; NOSORT: rethrow $[[REG1]] # to caller
|
|
define void @test8() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
|
|
bb0:
|
|
invoke void @foo()
|
|
to label %bb1 unwind label %catch.dispatch0
|
|
|
|
bb1: ; preds = %bb0
|
|
invoke void @bar()
|
|
to label %try.cont unwind label %catch.dispatch1
|
|
|
|
catch.dispatch0: ; preds = %bb0
|
|
%0 = catchswitch within none [label %catch.start0] unwind to caller
|
|
|
|
catch.start0: ; preds = %catch.dispatch0
|
|
%1 = catchpad within %0 [i8* null]
|
|
%2 = call i8* @llvm.wasm.get.exception(token %1)
|
|
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
|
|
%4 = 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
|
|
|
|
catch.dispatch1: ; preds = %bb1
|
|
%5 = catchswitch within none [label %catch.start1] unwind to caller
|
|
|
|
catch.start1: ; preds = %catch.dispatch1
|
|
%6 = catchpad within %5 [i8* null]
|
|
%7 = call i8* @llvm.wasm.get.exception(token %6)
|
|
%8 = call i32 @llvm.wasm.get.ehselector(token %6)
|
|
%9 = call i8* @__cxa_begin_catch(i8* %7) [ "funclet"(token %6) ]
|
|
call void @__cxa_end_catch() [ "funclet"(token %6) ]
|
|
catchret from %6 to label %try.cont
|
|
|
|
try.cont: ; preds = %catch.start1, %catch.start0, %bb1
|
|
ret void
|
|
}
|
|
|
|
; In CFGSort, EH pads should be sorted as soon as it is available and
|
|
; 'Preferred' queue and should NOT be entered into 'Ready' queue unless we are
|
|
; in the middle of sorting another region that does not contain the EH pad. In
|
|
; this example, 'catch.start' should be sorted right after 'if.then' is sorted
|
|
; (before 'cont' is sorted) and there should not be any unwind destination
|
|
; mismatches in CFGStackify.
|
|
|
|
; NOOPT: block
|
|
; NOOPT: try
|
|
; NOOPT: call foo
|
|
; NOOPT: catch
|
|
; NOOPT: end_try
|
|
; NOOPT: call foo
|
|
; NOOPT: end_block
|
|
; NOOPT: return
|
|
define void @test9(i32 %arg) personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
|
|
entry:
|
|
%tobool = icmp ne i32 %arg, 0
|
|
br i1 %tobool, label %if.then, label %if.end
|
|
|
|
catch.dispatch: ; preds = %if.then
|
|
%0 = catchswitch within none [label %catch.start] unwind to caller
|
|
|
|
catch.start: ; preds = %catch.dispatch
|
|
%1 = catchpad within %0 [i8* null]
|
|
%2 = call i8* @llvm.wasm.get.exception(token %1)
|
|
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
|
|
%4 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ]
|
|
call void @__cxa_end_catch() [ "funclet"(token %1) ]
|
|
catchret from %1 to label %if.end
|
|
|
|
if.then: ; preds = %entry
|
|
invoke void @foo()
|
|
to label %cont unwind label %catch.dispatch
|
|
|
|
cont: ; preds = %if.then
|
|
call void @foo()
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %cont, %catch.start, %entry
|
|
ret void
|
|
}
|
|
|
|
%class.Object = type { i8 }
|
|
|
|
; Intrinsics like memcpy, memmove, and memset don't throw and are lowered into
|
|
; calls to external symbols (not global addresses) in instruction selection,
|
|
; which will be eventually lowered to library function calls.
|
|
; Because this test runs with -wasm-disable-ehpad-sort, these library calls in
|
|
; invoke.cont BB fall within try~end_try, but they shouldn't cause crashes or
|
|
; unwinding destination mismatches in CFGStackify.
|
|
|
|
; NOSORT-LABEL: test10
|
|
; NOSORT: try
|
|
; NOSORT: call foo
|
|
; NOSORT: call {{.*}} memcpy
|
|
; NOSORT: call {{.*}} memmove
|
|
; NOSORT: call {{.*}} memset
|
|
; NOSORT: return
|
|
; NOSORT: catch
|
|
; NOSORT: rethrow
|
|
; NOSORT: end_try
|
|
define void @test10(i8* %a, i8* %b) personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
|
|
entry:
|
|
%o = alloca %class.Object, align 1
|
|
invoke void @foo()
|
|
to label %invoke.cont unwind label %ehcleanup
|
|
|
|
invoke.cont: ; preds = %entry
|
|
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a, i8* %b, i32 100, i1 false)
|
|
call void @llvm.memmove.p0i8.p0i8.i32(i8* %a, i8* %b, i32 100, i1 false)
|
|
call void @llvm.memset.p0i8.i32(i8* %a, i8 0, i32 100, i1 false)
|
|
%call = call %class.Object* @_ZN6ObjectD2Ev(%class.Object* %o) #1
|
|
ret void
|
|
|
|
ehcleanup: ; preds = %entry
|
|
%0 = cleanuppad within none []
|
|
%call2 = call %class.Object* @_ZN6ObjectD2Ev(%class.Object* %o) #1 [ "funclet"(token %0) ]
|
|
cleanupret from %0 unwind to caller
|
|
}
|
|
|
|
; Tests if 'try' marker is placed correctly. In this test, 'try' should be
|
|
; placed before the call to 'nothrow_i32' and not between the call to
|
|
; 'nothrow_i32' and 'fun', because the return value of 'nothrow_i32' is
|
|
; stackified and pushed onto the stack to be consumed by the call to 'fun'.
|
|
|
|
; CHECK-LABEL: test11
|
|
; CHECK: try
|
|
; CHECK: call $push{{.*}}=, nothrow_i32
|
|
; CHECK: call fun, $pop{{.*}}
|
|
define void @test11() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
|
|
entry:
|
|
%call = call i32 @nothrow_i32()
|
|
invoke void @fun(i32 %call)
|
|
to label %invoke.cont unwind label %terminate
|
|
|
|
invoke.cont: ; preds = %entry
|
|
ret void
|
|
|
|
terminate: ; preds = %entry
|
|
%0 = cleanuppad within none []
|
|
%1 = tail call i8* @llvm.wasm.get.exception(token %0)
|
|
call void @__clang_call_terminate(i8* %1) [ "funclet"(token %0) ]
|
|
unreachable
|
|
}
|
|
|
|
; Check if the unwind destination mismatch stats are correct
|
|
; NOSORT-STAT: 11 wasm-cfg-stackify - Number of EH pad unwind mismatches found
|
|
|
|
declare void @foo()
|
|
declare void @bar()
|
|
declare i32 @baz()
|
|
declare void @fun(i32)
|
|
; Function Attrs: nounwind
|
|
declare void @nothrow(i32) #0
|
|
declare i32 @nothrow_i32() #0
|
|
; Function Attrs: nounwind
|
|
declare %class.Object* @_ZN6ObjectD2Ev(%class.Object* returned) #0
|
|
declare i32 @__gxx_wasm_personality_v0(...)
|
|
declare i8* @llvm.wasm.get.exception(token)
|
|
declare i32 @llvm.wasm.get.ehselector(token)
|
|
declare void @llvm.wasm.rethrow.in.catch()
|
|
declare i32 @llvm.eh.typeid.for(i8*)
|
|
declare i8* @__cxa_begin_catch(i8*)
|
|
declare void @__cxa_end_catch()
|
|
declare void @__clang_call_terminate(i8*)
|
|
declare void @_ZSt9terminatev()
|
|
; Function Attrs: nounwind
|
|
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i32, i1 immarg) #0
|
|
; Function Attrs: nounwind
|
|
declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i1 immarg) #0
|
|
; Function Attrs: nounwind
|
|
declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1 immarg) #0
|
|
|
|
attributes #0 = { nounwind }
|