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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - WebAssembly: non-simd128 functions aren't inlined into simd128 functions"
href="https://bugs.llvm.org/show_bug.cgi?id=46812">46812</a>
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<th>Summary</th>
<td>WebAssembly: non-simd128 functions aren't inlined into simd128 functions
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<th>Product</th>
<td>libraries
</td>
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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>Windows NT
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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>Interprocedural Optimizations
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>alex@crichton.co
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, tlively@google.com
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<p>
<div>
<pre>This issue was discovered when working with the simd128 feature of WebAssembly
and LLVM, but the following IR:
target triple = "wasm32-unknown-unknown"
define void @bar() #0 {
start:
tail call fastcc void @inline_me()
ret void
}
define internal void @inline_me() {
start:
tail call void @foo()
ret void
}
declare void @foo()
attributes #0 = { "target-features"="+simd128" }
when optimized with `opt -O2` won't actually inline the `inline_me` function.
This looks to be due to a conservative default of not inlining when target
features differ, but WebAssembly can probably inline regardless of target
features due to how the entire binary validates as a whole or doesn't.</pre>
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