| Issue |
87904
|
| Summary |
Error address for instruction adrp in JIT compilation
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
cfg1234
|
Affected version: 15.0.4
Here is the part of the IR code:
define dso_local noalias nonnull ptr @getExecution() local_unnamed_addr #0 {
entry:
%call = tail call noalias noundef nonnull dereferenceable(96) ptr @_Znwm(i64 noundef 96) #9
tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(96) %call, i8 0, i64 96, i1 false)
store ptr getelementptr inbounds ({ [8 x ptr] }, ptr @_ZTVN3com4my4plan14MyImpl4E, i64 0, inrange i32 0, i64 2), ptr %call, align 8, !tbaa !2
ret ptr %call
}
When the JIT is used to compile the code, there is a low probability that the address offset of the adrp instruction is incorrect:
correct machine code example:
0: f81f0ffe str x30, [sp, #-16]!
4: 52801000 mov w0, #0x80 // #128
8: 9400000e bl 38 <_Znwm+0x38>
c: b0117fe8 adrp x8, 22ffd000 <getExecution+0x22ffd000>
10: 6f00e400 movi v0.2d, #0x0
14: f9400108 ldr x8, [x8]
18: 3d801c00 str q0, [x0, #112]
1c: ad008000 stp q0, q0, [x0, #16]
wrong machine code example:
0: f81f0ffe str x30, [sp, #-16]!
4: 52801000 mov w0, #0x80 // #128
8: 9400000e bl 38 <_Znwm+0x38>
c: d0ffffe8 adrp x8, ffffffffffffe000 <getExecution+0xffffffffffffe000>
10: 6f00e400 movi v0.2d, #0x0
14: f9400108 ldr x8, [x8]
18: 3d801c00 str q0, [x0, #112]
1c: ad008000 stp q0, q0, [x0, #16]
![]()
_______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
