Small Device C Compiler (SDCC) / Bugs / #2182 stm8instructionSize() inaccuracies

#2182 stm8instructionSize() inaccuracies

Status: closed-fixed

Owner: Philipp Klaus Krause

Labels: None

Category: STM8

Priority: 5

Updated: 2013-12-17

Created: 2013-06-08

Creator: Philipp Klaus Krause

Private: No

stm8instructionSize() reports 2 instead of 3 as instruction size for jp. It reports 3 instead of 2 for addw sp, #byte.

I see this error in revision #8712. Enabling the debug fprintf in line 113 of SDCCpeeph.c helped me find this bug, and is probably useful in debugging it and checking for similar ones.

Philipp

Discussion

Philipp Klaus Krause - 2013-07-29

I have changed peep.c in a way that makes this bug no longer that bad: We now might miss some optimization potential, but shouldn't generate wrong assembly any more; thus I've enabled peepholes for optimzing absolute into relative jumps.
Still fixing this bug might allow us to optimize a bit more in a bit more cases.

Philipp

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Philipp Klaus Krause - 2013-12-17

Fixed in revision #8907.

Philipp

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Philipp Klaus Krause - 2013-12-17

status: open --> closed-fixed

assigned_to: Philipp Klaus Krause
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stm8instructionSize() inaccuracies

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

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#2182 stm8instructionSize() inaccuracies

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