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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ARM: Builtins should use AAPCS ABI for non-windows platforms"
href="https://bugs.llvm.org/show_bug.cgi?id=33030">33030</a>
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<th>Summary</th>
<td>ARM: Builtins should use AAPCS ABI for non-windows platforms
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<th>Product</th>
<td>compiler-rt
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>compiler-rt
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>manojgupta@google.com
</td>
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<th>CC</th>
<td>echristo@gmail.com, llozano@chromium.org, llvm-bugs@lists.llvm.org, renato.golin@linaro.org, weimingz@codeaurora.org
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<pre>COMPILER_RT_ABI is incorrectly defined in compiler-rt trunk.
For ARM, COMPILER_RT_ABI used to be defined as aapcs unconditionally.
#define COMPILER_RT_ABI __attribute__((pcs("aapcs")))
However, r298974 changed the following define conditional on HF:
# ifdef COMPILER_RT_ARMHF_TARGET
# define COMPILER_RT_ABI
# else
# define COMPILER_RT_ABI __attribute__((pcs("aapcs")))
# endif
This does not work on Non-Windows platforms since llvm always expects AAPCS ABI
for the builtins.
E.g. d2ulz is expected to have AAPCS calling convention.
$ grep -r d2ulz llvm/lib/Target/ARM/
llvm/lib/Target/ARM/ARMISelLowering.cpp: { RTLIB::FPTOUINT_F64_I64,
"__aeabi_d2ulz", CallingConv::ARM_AAPCS, ISD::SETCC_INVALID },</pre>
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