https://bugs.llvm.org/show_bug.cgi?id=34268
Bug ID: 34268
Summary: JITting of x32 code on x64 fails with crash or
instruction selection error.
Product: libraries
Version: 4.0
Hardware: Macintosh
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: OrcJIT
Assignee: unassignedb...@nondot.org
Reporter: 1101.deb...@gmail.com
CC: llvm-bugs@lists.llvm.org
I compile a simple code:
// main.c
#include <stdio.h>
int square(int x) {
return x * x;
}
int main() {
printf("%d\n", square(4));
return 0;
}
Using the following command:
> clang-4.0 main.c -c -emit-llvm -m32
Then I try to run the bitcode using lli. Based on jit kind it either crashes or
shows an instruction selection error:
> lli-4.0 -jit-kind=orc-mcjit main.bc
0 libLLVM-4.0.so.1 0x00007fa69adc49a8
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 56
1 libLLVM-4.0.so.1 0x00007fa69adc2b2e llvm::sys::RunSignalHandlers() + 62
2 libLLVM-4.0.so.1 0x00007fa69adc2c7c
3 libpthread.so.0 0x00007fa69a4aa390
4 libpthread.so.0 0x00007fa69d81e026
Stack dump:
0. Program arguments: lli-4.0 -jit-kind=orc-mcjit main.bc
fish: “lli-4.0 -jit-kind=orc-mcjit mai…” terminated by signal SIGSEGV (Address
boundary error)
> lli-4.0 main.bc
0 libLLVM-4.0.so.1 0x00007f2377ae19a8
llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 56
1 libLLVM-4.0.so.1 0x00007f2377adfb2e llvm::sys::RunSignalHandlers() + 62
2 libLLVM-4.0.so.1 0x00007f2377adfc7c
3 libpthread.so.0 0x00007f23771c7390
4 libpthread.so.0 0x00007f237a53b026
Stack dump:
0. Program arguments: lli-4.0 main.bc
fish: “lli-4.0 main.bc” terminated by signal SIGSEGV (Address boundary error)
> lli-4.0 -jit-kind=orc-lazy main.bc
LLVM ERROR: Cannot select: 0x199d480: ch,glue = X86ISD::CALL 0x199d418,
0x199d758, Register:i32 %EDI, Register:i32 %ESI, Register:i8 %AL,
RegisterMask:Untyped, 0x199d418:1
0x199d758: i32 = X86ISD::Wrapper TargetGlobalAddress:i32<i32 (i8*, ...)*
@printf> 0
0x199d140: i32 = TargetGlobalAddress<i32 (i8*, ...)* @printf> 0
0x199ce00: i32 = Register %EDI
0x199d2e0: i32 = Register %ESI
0x199d3b0: i8 = Register %AL
0x199ced0: Untyped = RegisterMask
0x199d418: ch,glue = CopyToReg 0x199d348, Register:i8 %AL, Constant:i8<0>,
0x199d348:1
0x199d3b0: i8 = Register %AL
0x199d210: i8 = Constant<0>
0x199d348: ch,glue = CopyToReg 0x199d278, Register:i32 %ESI, 0x199d070,
0x199d278:1
0x199d2e0: i32 = Register %ESI
0x199d070: i32,ch,glue = CopyFromReg 0x199cfa0, Register:i32 %EAX,
0x199cfa0:1
0x199d008: i32 = Register %EAX
0x199cfa0: ch,glue = callseq_end 0x199cf38, TargetConstant:i32<0>,
TargetConstant:i32<0>, 0x199cf38:1
0x199cd30: i32 = TargetConstant<0>
0x199cd30: i32 = TargetConstant<0>
0x199cf38: ch,glue = X86ISD::CALL 0x199ce68, 0x199d7c0, Register:i32
%EDI, RegisterMask:Untyped, 0x199ce68:1
0x199d7c0: i32 = X86ISD::Wrapper TargetGlobalAddress:i32<i32 (i32)*
@square> 0
0x199d0d8: i32 = TargetGlobalAddress<i32 (i32)* @square> 0
0x199ce00: i32 = Register %EDI
0x199ced0: Untyped = RegisterMask
0x199ce68: ch,glue = CopyToReg 0x199cd98, Register:i32 %EDI,
Constant:i32<4>
0x199ce00: i32 = Register %EDI
0x199ccc8: i32 = Constant<4>
0x199d278: ch,glue = CopyToReg 0x199d1a8, Register:i32 %EDI, 0x199d6f0
0x199ce00: i32 = Register %EDI
0x199d6f0: i32 = X86ISD::Wrapper TargetGlobalAddress:i32<[4 x i8]*
@"$static.0"> 0
0x199d688: i32 = TargetGlobalAddress<[4 x i8]* @"$static.0"> 0
In function: main
===
I tested it only on Linux, but other systems might be affected as well.
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