maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/CodeGen/WebAssembly/unreachable.ll

35 lines
743 B
LLVM
Raw Normal View History

[WebAssembly] Reintroduce ARGUMENT moving logic Reinteroduce the code for moving ARGUMENTS back to the top of the basic block. While the ARGUMENTS physical register prevents sinking and scheduling from moving them, it does not appear to be sufficient to prevent SelectionDAG from moving them down in the initial schedule. This patch introduces a patch that moves them back to the top immediately after SelectionDAG runs. This is still hopefully a temporary solution. http://reviews.llvm.org/D14750 is one alternative, though the review has not been favorable, and proposed alternatives are longer-term and have other downsides. This fixes the main outstanding -verify-machineinstrs failures, so it adds -verify-machineinstrs to several tests. Differential Revision: http://reviews.llvm.org/D15377 llvm-svn: 255125
2015-12-10 00:23:59 +08:00
; RUN: llc < %s -asm-verbose=false -verify-machineinstrs | FileCheck %s
; RUN: llc < %s -asm-verbose=false -fast-isel -verify-machineinstrs | FileCheck %s
[WebAssembly] Support 'unreachable' expression Lower LLVM's 'unreachable' terminator to ISD::TRAP, and lower ISD::TRAP to wasm's 'unreachable' expression. WebAssembly type-checks expressions, but a noreturn function with a return type that doesn't match the context will cause a check failure. So we lower LLVM 'unreachable' to ISD::TRAP and then lower that to WebAssembly's 'unreachable' expression, which typechecks in any context and causes a trap if executed. Differential Revision: http://reviews.llvm.org/D14515 llvm-svn: 252566
2015-11-10 08:30:57 +08:00
; Test that LLVM unreachable instruction and trap intrinsic are lowered to
; wasm unreachable
target datalayout = "e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
declare void @llvm.trap()
declare void @llvm.debugtrap()
declare void @abort()
; CHECK-LABEL: f1:
[WebAssembly] Reapply r252858, with svn add for the new file. Switch to MC for instruction printing. This encompasses several changes which are all interconnected: - Use the MC framework for printing almost all instructions. - AsmStrings are now live. - This introduces an indirection between LLVM vregs and WebAssembly registers, and a new pass, WebAssemblyRegNumbering, for computing a basic the mapping. This addresses some basic issues with argument registers and unused registers. - The way ARGUMENT instructions are handled no longer generates redundant get_local+set_local for every argument. This also changes the assembly syntax somewhat; most notably, MC's printing does not use sigils on label names, so those are no longer present, and push/pop now have a sigil to keep them unambiguous. The usage of set_local/get_local/$push/$pop will continue to evolve significantly. This patch is just one step of a larger change. llvm-svn: 252910
2015-11-13 01:04:33 +08:00
; CHECK: call abort
[WebAssembly] Support 'unreachable' expression Lower LLVM's 'unreachable' terminator to ISD::TRAP, and lower ISD::TRAP to wasm's 'unreachable' expression. WebAssembly type-checks expressions, but a noreturn function with a return type that doesn't match the context will cause a check failure. So we lower LLVM 'unreachable' to ISD::TRAP and then lower that to WebAssembly's 'unreachable' expression, which typechecks in any context and causes a trap if executed. Differential Revision: http://reviews.llvm.org/D14515 llvm-svn: 252566
2015-11-10 08:30:57 +08:00
; CHECK: unreachable
define i32 @f1() {
call void @abort()
unreachable
}
; CHECK-LABEL: f2:
; CHECK: unreachable
define void @f2() {
call void @llvm.trap()
ret void
}
; CHECK-LABEL: f3:
; CHECK: unreachable
define void @f3() {
call void @llvm.debugtrap()
ret void
}