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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 - Inlined functions are not optimized as well as the same code copied in-line"
href="https://bugs.llvm.org/show_bug.cgi?id=43033">43033</a>
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<th>Summary</th>
<td>Inlined functions are not optimized as well as the same code copied in-line
</td>
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<th>Product</th>
<td>new-bugs
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>henrik@gramner.com
</td>
</tr>
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>Minimal sample code:
static inline int imin(int a, int b) {
return a < b ? a : b;
}
int fn1(int a, int b) {
if (a < b) __builtin_unreachable();
return imin(a, b);
}
int fn2(int a, int b) {
if (a < b) __builtin_unreachable();
return a < b ? a : b;
}
compiled with -O3 produces (Linux x86-64):
fn1:
mov eax, esi
cmp edi, esi
cmovle eax, edi
ret
fn2:
mov eax, esi
ret
Only in fn2 is the ternary operation correctly optimized away.</pre>
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