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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - riscv inline assembly compilation failure"
href="https://bugs.llvm.org/show_bug.cgi?id=42912">42912</a>
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<th>Summary</th>
<td>riscv inline assembly compilation failure
</td>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>ronen.haen@wdc.com
</td>
</tr>
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>riscv inline assembly input operand failure for the following code:
#define M_SET_ENTRY(func) asm volatile ("la x31, %0" : : "i"(func) : );
void my_func(void)
{
/*
* some code here
*/
}
void some_func(void)
{
/*
* some code here
*/
M_SET_ENTRY(my_func);
}
The failure I get:
./clang -o test.o -c -Os -ffunction-sections -fdata-sections -Wall -c
-fno-builtin-printf -include sys/cdefs.h -mabi=ilp32 -g3 -gdwarf-2
-march=rv32imac --gcc-toolchain=/home/work/bld-rv-linux-32/
--sysroot=/home/work/bld-rv-linux-32/riscv32-unknown-elf/ test.c
test.c:105:4: error: invalid operand in inline asm: 'la x31, $0'
M_SET_ENTRY(my_func);
^
test.c:91:41: note: expanded from macro 'M_SET_ENTRY'
#define M_SET_ENTRY(func) asm volatile ("la x31, %0" : : "i"(func) : );
^
test.c:105:4: error: unknown operand
test.c:91:41: note: expanded from macro 'M_SET_ENTRY'
#define M_SET_ENTRY(func) asm volatile ("la x31, %0" : : "i"(func) : );
^
<inline asm>:1:10: note: instantiated into assembly here
la x31,
^
2 errors generated.</pre>
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