[AArch64][GISel] Assert "invalid to directly change element size for pointers" #166556
Description
This IR:
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128-Fn32"
target triple = "aarch64-unknown-linux-gnu"
define <4 x ptr> @_Z4testabbbyxiPA17_i(<4 x ptr> %0) {
entry:
%1 = icmp ugt <4 x ptr> %0, zeroinitializer
%2 = select <4 x i1> %1, <4 x ptr> %0, <4 x ptr> zeroinitializer
ret <4 x ptr> %2
}
triggers this assert:
llc: /root/llvm-project/llvm/include/llvm/CodeGenTypes/LowLevelType.h:220: constexpr llvm::LLT llvm::LLT::changeElementSize(unsigned int) const: Assertion `!isPointerOrPointerVector() && "invalid to directly change element size for pointers"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace and instructions to reproduce the bug.
Stack dump:
0. Program arguments: /opt/compiler-explorer/clang-assertions-trunk/bin/llc -o /app/output.s -x86-asm-syntax=intel --verify-machineinstrs -global-isel <source>
1. Running pass 'Function Pass Manager' on module '<source>'.
2. Running pass 'Legalizer' on function '@_Z4testabbbyxiPA17_i'
#0 0x000000000419d348 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x419d348)
#1 0x000000000419a1f4 SignalHandler(int, siginfo_t*, void*) Signals.cpp:0:0
#2 0x00007f75dfc42520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x00007f75dfc969fc pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x969fc)
#4 0x00007f75dfc42476 gsignal (/lib/x86_64-linux-gnu/libc.so.6+0x42476)
#5 0x00007f75dfc287f3 abort (/lib/x86_64-linux-gnu/libc.so.6+0x287f3)
#6 0x00007f75dfc2871b (/lib/x86_64-linux-gnu/libc.so.6+0x2871b)
#7 0x00007f75dfc39e96 (/lib/x86_64-linux-gnu/libc.so.6+0x39e96)
#8 0x000000000482faf9 llvm::LegalizerHelper::lowerMinMax(llvm::MachineInstr&) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x482faf9)
#9 0x0000000004853c45 llvm::LegalizerHelper::lower(llvm::MachineInstr&, unsigned int, llvm::LLT) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x4853c45)
#10 0x000000000480d7db llvm::Legalizer::legalizeMachineFunction(llvm::MachineFunction&, llvm::LegalizerInfo const&, llvm::ArrayRef<llvm::GISelChangeObserver*>, llvm::LostDebugLocObserver&, llvm::MachineIRBuilder&, llvm::GISelValueTracking*) (/opt/compiler-explorer/clang-assertions-trunk/bin/llc+0x480d7db)
when compiled with llc -global-isel, see also: https://godbolt.org/z/663GxGane