Internal error 2021121904

Summary

Internal error 2021121904

System Information

• Operating system: Linux
• Processor architecture: x86-64
• Compiler version: 3.3.1 37f14570
• Device: Computer

Steps to reproduce

1. create file asd.pas:

   unit asd;
   interface
   	type
   		int32container = record
   			val: int32;
   		end;
   implementation
   	procedure asdf;
   	var
   		a: int32container;
   		b: int32;
   	begin
   		if b > a.val then
   			b := a.val;
   	end;
   end.

2. run

   ppcx64 -O2 asd

What is the current bug behavior?

Free Pascal Compiler version 3.3.1 [2024/03/31] for x86_64
Copyright (c) 1993-2024 by Florian Klaempfl and others
Target OS: Linux for x86-64
Compiling asd.pas
asd.pas(13,5) Warning: Local variable "b" does not seem to be initialized
asd.pas(13,9) Warning: Local variable "a" does not seem to be initialized
asd.pas(13,7) Fatal: Internal error 2021121904
Fatal: Compilation aborted

What is the expected (correct) behavior?

Free Pascal Compiler version 3.3.1 [2024/03/26] for x86_64
Copyright (c) 1993-2024 by Florian Klaempfl and others
Target OS: Linux for x86-64
Compiling asd.pas
asd.pas(14,5) Warning: Local variable "b" does not seem to be initialized
asd.pas(14,9) Warning: Local variable "a" does not seem to be initialized
16 lines compiled, 0.0 sec
2 warning(s) issued

when was bug introduced?

	commit hash	commit message
bad	11b341cc	* x86: Added new OptPass1CMOVcc peephole optimisation routine to dust up min/max code
can't compile compiler	c79361c0	* Min/max intrinsics now simplify deterministic results
can't compile compiler	e4a0ce2f	* x86: Min/max intrinsic support
good	77c86caf	* a64: Fixed bug where unsigned min/max inlines used a signed comparison