<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Opportunity to skip dereferencie and move"
href="https://bugs.llvm.org/show_bug.cgi?id=38241">38241</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Opportunity to skip dereferencie and move
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Scalar Optimizations
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>david.bolvansky@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Code:
typedef struct X {
int *p;
int *q;
} example_t;
int foo(example_t *e, int x) {
*e->p = x;
example_t c = *e;
return *c.p;
}
Clang trunk -O3
foo(X*, int): # @foo(X*, int)
mov rax, qword ptr [rdi]
mov dword ptr [rax], esi
mov rax, qword ptr [rdi]
mov eax, dword ptr [rax]
ret
GGC trunk
foo(X*, int):
mov rdx, QWORD PTR [rdi]
mov eax, esi
mov DWORD PTR [rdx], esi
ret</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>