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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [RV64] Wrong libcall emitted"
href="https://bugs.llvm.org/show_bug.cgi?id=46317">46317</a>
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<th>Summary</th>
<td>[RV64] Wrong libcall emitted
</td>
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<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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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>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: RISC-V
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>kamleshbhalui@gmail.com
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</tr>
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<th>CC</th>
<td>asb@lowrisc.org, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>consider below testcase for problem overview.
$cat test.c
int foo(double x){
return x;
}
$clang -O2 -target riscv64 -march=rv64imac -mabi=lp64 test.c -S
$cat test.s
foo(double): # @foo(double)
addi sp, sp, -16
sd ra, 8(sp)
call __fixdfdi // this is incorrect.
ld ra, 8(sp)
addi sp, sp, 16
ret
while libcall emitted by gcc looks right.
$riscv64-gcc -O2 -march=rv64imac -mabi=lp64 -S test.c
$cat test.s
foo(double):
addi sp,sp,-16
sd ra,8(sp)
call __fixdfsi // This is correct.
ld ra,8(sp)
sext.w a0,a0
addi sp,sp,16
jr ra
as it can be observed clang emitted wrong lib call?</pre>
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