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<p class="MsoNormal">Dear LLVM Folks,<o:p></o:p></p>
<p class="MsoNormal">Attached please find a patch for the MSP430 LLVM target. This is my first patch submission and I will be continuing to work on bringing the MSP LLVM target to working condition. MSP430-GCC has updated its calling convention. In addition
to the LLVM lit target tests, these changes have been tested by assembling, linking and running tests with the current MSP430-GCC framework.<o:p></o:p></p>
<p class="MsoNormal">This patch contains the following changes to update the MSP430 calling convention to conform to MSP430 EABI:<o:p></o:p></p>
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<![if !supportLists]><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Pass args in R12-R15<o:p></o:p></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Return args in R12-R15<o:p></o:p></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="mso-list:Ignore">3)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Store on stack and pass in registers starting with least significant word<o:p></o:p></p>
<p class="MsoListParagraphCxSpMiddle" style="text-indent:-.25in;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="mso-list:Ignore">4)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>32-bit argument may be split between register (R15) and stack if no args placed on stack yet<o:p></o:p></p>
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<![if !supportLists]><span style="mso-list:Ignore">5)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Register ‘holes’ may be back-filled (but only by arguments that fit entirely in regs, no split args once first arg placed on stack)<o:p></o:p></p>
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<![if !supportLists]><span style="mso-list:Ignore">6)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Only R4 through R10 are callee-saved registers; R11 is updated to be caller-save<o:p></o:p></p>
<p class="MsoNormal">I have attempted to follow the Developer’s Policy. Please let me know if anything is lacking.<o:p></o:p></p>
<p class="MsoNormal">Thank you,<o:p></o:p></p>
<p class="MsoNormal">Anna Youssefi<o:p></o:p></p>
<p class="MsoNormal">Texas Instruments, Codegen<o:p></o:p></p>
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