c87b5e7e22
Summary:
The previous code for determining the innermost region in CFGSort was
not correct. We determine subregion relationship by domination of their
headers, i.e., if region A's header dominates region B's header, B is a
subregion of A. Previously we assumed that if a BB belongs to both a
loop and an exception, the region with fewer number of BBs is the
innermost one. This may not be true, because while WebAssemblyException
contains BBs in all its subregions (loops or exceptions), MachineLoop
may not, because MachineLoop does not contain BBs that don't have a path
to its header even if they are dominated by its header.
Loop header <---|
| |
Exception header |
| \ |
A B |
| \ |
| C |
| |
Loop latch |
| |
-------------|
For example, in this CFG, the loop does not contain B and C, because
they don't have a path back to the loops header. But for CFGSort we
consider the exception here belongs to the loop and the exception should
be a subregion of the loop and scheduled together.
So here we should use `WE->contains(ML->getHeader())` (but not
`ML->contains(WE->getHeader())`, for the stated region above).
This also fixes some comments and deletes `Regions` vector in
`RegionInfo` class, which was not used anywere.
Reviewers: dschuff
Subscribers: sbc100, jgravelle-google, hiraditya, sunfish, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D77181
842 lines
34 KiB
LLVM
842 lines
34 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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|
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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
|
|
|
|
catch.dispatch1: ; preds = %bb1
|
|
%4 = catchswitch within none [label %catch.start1] unwind to caller
|
|
|
|
catch.start1: ; preds = %catch.dispatch1
|
|
%5 = catchpad within %4 [i8* null]
|
|
%6 = call i8* @llvm.wasm.get.exception(token %5)
|
|
%7 = call i32 @llvm.wasm.get.ehselector(token %5)
|
|
catchret from %5 to label %try.cont
|
|
|
|
try.cont: ; preds = %catch.start1, %catch.start0, %bb1
|
|
ret void
|
|
}
|
|
|
|
; 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
|
|
}
|
|
|
|
%class.MyClass = type { i32 }
|
|
|
|
; This crashed on debug mode (= when NDEBUG is not defined) when the logic for
|
|
; computing the innermost region was not correct, in which a loop region
|
|
; contains an exception region. This should pass CFGSort without crashing.
|
|
define void @test12() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
|
|
entry:
|
|
%e = alloca %class.MyClass, align 4
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %for.inc, %entry
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
|
|
%cmp = icmp slt i32 %i.0, 9
|
|
br i1 %cmp, label %for.body, label %for.end
|
|
|
|
for.body: ; preds = %for.cond
|
|
invoke void @quux(i32 %i.0)
|
|
to label %for.inc unwind label %catch.dispatch
|
|
|
|
catch.dispatch: ; preds = %for.body
|
|
%0 = catchswitch within none [label %catch.start] unwind to caller
|
|
|
|
catch.start: ; preds = %catch.dispatch
|
|
%1 = catchpad within %0 [i8* bitcast ({ i8*, i8* }* @_ZTI7MyClass to i8*)]
|
|
%2 = call i8* @llvm.wasm.get.exception(token %1)
|
|
%3 = call i32 @llvm.wasm.get.ehselector(token %1)
|
|
%4 = call i32 @llvm.eh.typeid.for(i8* bitcast ({ i8*, i8* }* @_ZTI7MyClass to i8*)) #3
|
|
%matches = icmp eq i32 %3, %4
|
|
br i1 %matches, label %catch, label %rethrow
|
|
|
|
catch: ; preds = %catch.start
|
|
%5 = call i8* @__cxa_get_exception_ptr(i8* %2) #3 [ "funclet"(token %1) ]
|
|
%6 = bitcast i8* %5 to %class.MyClass*
|
|
%call = call %class.MyClass* @_ZN7MyClassC2ERKS_(%class.MyClass* %e, %class.MyClass* dereferenceable(4) %6) [ "funclet"(token %1) ]
|
|
%7 = call i8* @__cxa_begin_catch(i8* %2) #3 [ "funclet"(token %1) ]
|
|
%x = getelementptr inbounds %class.MyClass, %class.MyClass* %e, i32 0, i32 0
|
|
%8 = load i32, i32* %x, align 4
|
|
invoke void @quux(i32 %8) [ "funclet"(token %1) ]
|
|
to label %invoke.cont2 unwind label %ehcleanup
|
|
|
|
invoke.cont2: ; preds = %catch
|
|
%call3 = call %class.MyClass* @_ZN7MyClassD2Ev(%class.MyClass* %e) #3 [ "funclet"(token %1) ]
|
|
call void @__cxa_end_catch() [ "funclet"(token %1) ]
|
|
catchret from %1 to label %for.inc
|
|
|
|
rethrow: ; preds = %catch.start
|
|
call void @llvm.wasm.rethrow.in.catch() #6 [ "funclet"(token %1) ]
|
|
unreachable
|
|
|
|
for.inc: ; preds = %invoke.cont2, %for.body
|
|
%inc = add nsw i32 %i.0, 1
|
|
br label %for.cond
|
|
|
|
ehcleanup: ; preds = %catch
|
|
%9 = cleanuppad within %1 []
|
|
%call4 = call %class.MyClass* @_ZN7MyClassD2Ev(%class.MyClass* %e) #3 [ "funclet"(token %9) ]
|
|
invoke void @__cxa_end_catch() [ "funclet"(token %9) ]
|
|
to label %invoke.cont6 unwind label %terminate7
|
|
|
|
invoke.cont6: ; preds = %ehcleanup
|
|
cleanupret from %9 unwind to caller
|
|
|
|
for.end: ; preds = %for.cond
|
|
ret void
|
|
|
|
terminate7: ; preds = %ehcleanup
|
|
%10 = cleanuppad within %9 []
|
|
%11 = call i8* @llvm.wasm.get.exception(token %10)
|
|
call void @__clang_call_terminate(i8* %11) #7 [ "funclet"(token %10) ]
|
|
unreachable
|
|
}
|
|
|
|
; Check if the unwind destination mismatch stats are correct
|
|
; NOSORT-STAT: 14 wasm-cfg-stackify - Number of EH pad unwind mismatches found
|
|
|
|
declare void @foo()
|
|
declare void @bar()
|
|
declare i32 @baz()
|
|
declare void @quux(i32)
|
|
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
|
|
@_ZTI7MyClass = external constant { i8*, i8* }, align 4
|
|
; Function Attrs: nounwind
|
|
declare %class.MyClass* @_ZN7MyClassD2Ev(%class.MyClass* returned) #0
|
|
; Function Attrs: nounwind
|
|
declare %class.MyClass* @_ZN7MyClassC2ERKS_(%class.MyClass* returned, %class.MyClass* dereferenceable(4)) #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 i8* @__cxa_get_exception_ptr(i8*)
|
|
declare void @__clang_call_terminate(i8*)
|
|
declare void @_ZSt9terminatev()
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; Function Attrs: nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i32, i1 immarg) #0
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; Function Attrs: nounwind
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declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i1 immarg) #0
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; Function Attrs: nounwind
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declare void @llvm.memset.p0i8.i32(i8* nocapture writeonly, i8, i32, i1 immarg) #0
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attributes #0 = { nounwind }
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