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llvm/test/CodeGen/WebAssembly/cfg-stackify-eh.ll
Wouter van Oortmerssen a26aa42625 [WebAssembly] Added default stack-only instruction mode for MC. 
Summary:
Made it convert from register to stack based instructions, and removed the registers.
Fixes to related code that was expecting register based instructions.
Added the correct testing flag to all tests, depending on what the
format they were expecting so far.
Translated one test to stack format as example: reg-stackify-stack.ll

tested:
llvm-lit -v `find test -name WebAssembly`
unittests/MC/*

Reviewers: dschuff, sunfish

Subscribers: sbc100, jgravelle-google, eraman, aheejin, llvm-commits, jfb

Differential Revision: https://reviews.llvm.org/D51241

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@340750 91177308-0d34-0410-b5e6-96231b3b80d8
2018-08-27 15:45:51 +00:00

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; RUN: llc < %s -asm-verbose=false -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
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
@_ZTIi = external constant i8*
@_ZTId = external constant i8*
; Simple test case with two catch clauses
; CHECK-LABEL: test0
; CHECK: call foo@FUNCTION
; CHECK: .LBB0_1:
; CHECK: i32.catch
; CHECK: i32.call $drop=, _Unwind_CallPersonality@FUNCTION
; CHECK: i32.call $drop=, __cxa_begin_catch@FUNCTION
; CHECK: call bar@FUNCTION
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB0_3:
; CHECK: i32.call $drop=, __cxa_begin_catch@FUNCTION
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB0_5:
; CHECK: call __cxa_rethrow@FUNCTION
; CHECK: .LBB0_6:
; CHECK: return
define void @test0() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
entry:
invoke void @foo()
to label %try.cont unwind label %catch.dispatch
catch.dispatch: ; preds = %entry
%0 = catchswitch within none [label %catch.start] unwind to caller
catch.start: ; preds = %catch.dispatch
%1 = catchpad within %0 [i8* bitcast (i8** @_ZTIi to i8*), i8* bitcast (i8** @_ZTId 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** @_ZTIi to i8*))
%matches = icmp eq i32 %3, %4
br i1 %matches, label %catch2, label %catch.fallthrough
catch2: ; preds = %catch.start
%5 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ]
%6 = bitcast i8* %5 to i32*
%7 = load i32, i32* %6, align 4
call void @bar() [ "funclet"(token %1) ]
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
catch.fallthrough: ; preds = %catch.start
%8 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTId to i8*))
%matches1 = icmp eq i32 %3, %8
br i1 %matches1, label %catch, label %rethrow
catch: ; preds = %catch.fallthrough
%9 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ]
%10 = bitcast i8* %9 to double*
%11 = load double, double* %10, align 8
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
rethrow: ; preds = %catch.fallthrough
call void @__cxa_rethrow() [ "funclet"(token %1) ]
unreachable
try.cont: ; preds = %entry, %catch, %catch2
ret void
}
; Nested try-catches within a catch
; CHECK-LABEL: test1
; CHECK: call foo@FUNCTION
; CHECK: .LBB1_1:
; CHECK: i32.catch $0=, 0
; CHECK: i32.call $drop=, _Unwind_CallPersonality@FUNCTION, $0
; CHECK: i32.call $drop=, __cxa_begin_catch@FUNCTION, $0
; CHECK: call foo@FUNCTION
; CHECK: .LBB1_3:
; CHECK: i32.catch $0=, 0
; CHECK: i32.call $drop=, _Unwind_CallPersonality@FUNCTION, $0
; CHECK: i32.call $drop=, __cxa_begin_catch@FUNCTION, $0
; CHECK: call foo@FUNCTION
; CHECK: .LBB1_5:
; CHECK: catch_all
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: rethrow
; CHECK: .LBB1_6:
; CHECK: call __cxa_rethrow@FUNCTION
; CHECK: rethrow
; CHECK: .LBB1_7:
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB1_8:
; CHECK: catch_all
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB1_9:
; CHECK: call __cxa_rethrow@FUNCTION
; CHECK: rethrow
; CHECK: .LBB1_10:
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB1_11:
; CHECK: return
define hidden void @test1() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
entry:
invoke void @foo()
to label %try.cont11 unwind label %catch.dispatch
catch.dispatch: ; preds = %entry
%0 = catchswitch within none [label %catch.start] unwind to caller
catch.start: ; preds = %catch.dispatch
%1 = catchpad within %0 [i8* bitcast (i8** @_ZTIi 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** @_ZTIi to i8*))
%matches = icmp eq i32 %3, %4
br i1 %matches, label %catch, label %rethrow
catch: ; preds = %catch.start
%5 = call i8* @__cxa_begin_catch(i8* %2) [ "funclet"(token %1) ]
%6 = bitcast i8* %5 to i32*
%7 = load i32, i32* %6, align 4
invoke void @foo() [ "funclet"(token %1) ]
to label %try.cont unwind label %catch.dispatch2
catch.dispatch2: ; preds = %catch
%8 = catchswitch within %1 [label %catch.start3] unwind label %ehcleanup9
catch.start3: ; preds = %catch.dispatch2
%9 = catchpad within %8 [i8* bitcast (i8** @_ZTIi to i8*)]
%10 = call i8* @llvm.wasm.get.exception(token %9)
%11 = call i32 @llvm.wasm.get.ehselector(token %9)
%12 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*))
%matches4 = icmp eq i32 %11, %12
br i1 %matches4, label %catch6, label %rethrow5
catch6: ; preds = %catch.start3
%13 = call i8* @__cxa_begin_catch(i8* %10) [ "funclet"(token %9) ]
%14 = bitcast i8* %13 to i32*
%15 = load i32, i32* %14, align 4
invoke void @foo() [ "funclet"(token %9) ]
to label %invoke.cont8 unwind label %ehcleanup
invoke.cont8: ; preds = %catch6
call void @__cxa_end_catch() [ "funclet"(token %9) ]
catchret from %9 to label %try.cont
rethrow5: ; preds = %catch.start3
invoke void @__cxa_rethrow() [ "funclet"(token %9) ]
to label %unreachable unwind label %ehcleanup9
try.cont: ; preds = %catch, %invoke.cont8
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont11
rethrow: ; preds = %catch.start
call void @__cxa_rethrow() [ "funclet"(token %1) ]
unreachable
try.cont11: ; preds = %entry, %try.cont
ret void
ehcleanup: ; preds = %catch6
%16 = cleanuppad within %9 []
call void @__cxa_end_catch() [ "funclet"(token %16) ]
cleanupret from %16 unwind label %ehcleanup9
ehcleanup9: ; preds = %ehcleanup, %rethrow5, %catch.dispatch2
%17 = cleanuppad within %1 []
call void @__cxa_end_catch() [ "funclet"(token %17) ]
cleanupret from %17 unwind to caller
unreachable: ; preds = %rethrow5
unreachable
}
; Nested loop within a catch clause
; CHECK-LABEL: test2
; CHECK: call foo@FUNCTION
; CHECK: .LBB2_1:
; CHECK: i32.catch
; CHECK: i32.call $drop=, __cxa_begin_catch@FUNCTION
; CHECK: .LBB2_2:
; CHECK: call foo@FUNCTION
; CHECK: .LBB2_4:
; CHECK: catch_all
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB2_5:
; CHECK: i32.catch
; CHECK: call __clang_call_terminate@FUNCTION
; CHECK: unreachable
; CHECK: .LBB2_6:
; CHECK: catch_all
; CHECK: call _ZSt9terminatev@FUNCTION
; CHECK: unreachable
; CHECK: .LBB2_7:
; CHECK: rethrow
; CHECK: .LBB2_8:
; CHECK: call __cxa_end_catch@FUNCTION
; CHECK: .LBB2_10:
; CHECK: return
define void @test2() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
entry:
invoke void @foo()
to label %try.cont unwind label %catch.dispatch
catch.dispatch: ; preds = %entry
%0 = catchswitch within none [label %catch.start] unwind to caller
catch.start: ; preds = %catch.dispatch
%1 = catchpad within %0 [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) ]
br label %for.cond
for.cond: ; preds = %for.inc, %catch.start
%i.0 = phi i32 [ 0, %catch.start ], [ %inc, %for.inc ]
%cmp = icmp slt i32 %i.0, 50
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
invoke void @foo() [ "funclet"(token %1) ]
to label %for.inc unwind label %ehcleanup
for.inc: ; preds = %for.body
%inc = add nsw i32 %i.0, 1
br label %for.cond
for.end: ; preds = %for.cond
call void @__cxa_end_catch() [ "funclet"(token %1) ]
catchret from %1 to label %try.cont
try.cont: ; preds = %for.end, %entry
ret void
ehcleanup: ; preds = %for.body
%5 = cleanuppad within %1 []
invoke void @__cxa_end_catch() [ "funclet"(token %5) ]
to label %invoke.cont2 unwind label %terminate
invoke.cont2: ; preds = %ehcleanup
cleanupret from %5 unwind to caller
terminate: ; preds = %ehcleanup
%6 = cleanuppad within %5 []
%7 = call i8* @llvm.wasm.get.exception(token %6)
call void @__clang_call_terminate(i8* %7) [ "funclet"(token %6) ]
unreachable
}
declare void @foo()
declare void @bar()
declare i32 @__gxx_wasm_personality_v0(...)
declare i8* @llvm.wasm.get.exception(token)
declare i32 @llvm.wasm.get.ehselector(token)
declare i32 @llvm.eh.typeid.for(i8*)
declare i8* @__cxa_begin_catch(i8*)
declare void @__cxa_end_catch()
declare void @__cxa_rethrow()
declare void @__clang_call_terminate(i8*)
declare void @_ZSt9terminatev()
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