Small Device C Compiler (SDCC) / Bugs / #2012 Dead assignment not eliminated

The Small Device C Compiler (SDCC), targeting 8-bit architectures

#2012 Dead assignment not eliminated

Status: closed-out-of-date

Owner: Philipp Klaus Krause

Labels: None

Category: other

Priority: 3

Updated: 2018-10-29

Created: 2012-04-23

Creator: Philipp Klaus Krause

Private: No

From the muldiv regression test, muldiv_storage_static_type_char_attr_none asm code for c code line 89:

; genAssign
mov #0xCE,*_testDiv_sloc0_1_0
; genAssign
mov #0xD1,*_testDiv_sloc0_1_0

(this is from hc08, on osome ther ports, such as z80, the issue is masked by the peephole optimizer)
I wonder why dead code elimination doesn't kill the first assignment.

Philipp

Discussion

Ben Shi - 2015-07-22

Category: --> redundancy elimination
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Philipp Klaus Krause - 2018-08-25

status: open --> pending-out-of-date

assigned_to: Philipp Klaus Krause

Category: redundancy elimination --> other
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Philipp Klaus Krause - 2018-08-25

I cannot reproduce this in current SDCC [r10516]. It probably got fixed long ago.

Philipp

If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Philipp Klaus Krause - 2018-10-29

status: pending-out-of-date --> closed-out-of-date
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Dead assignment not eliminated

The Small Device C Compiler (SDCC), targeting 8-bit architectures

Searches

Help

#2012 Dead assignment not eliminated

Discussion