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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [AMDGPU][CODEGEN] Inline assembler cannot be used in bundles"
href="https://bugs.llvm.org/show_bug.cgi?id=46285">46285</a>
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<th>Summary</th>
<td>[AMDGPU][CODEGEN] Inline assembler cannot be used in bundles
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<th>Product</th>
<td>libraries
</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>All
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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>Backend: AMDGPU
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>dpreobrazhensky@luxoft.com
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</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>Lowering of inline assembly fails when used in bundles.
An example (test.ll):
define amdgpu_kernel void @test_input_imm() {
call void asm sideeffect "s_mov_b32 s0, $0", "i"(i32 42)
call void asm sideeffect "s_mov_b64 s[0:1], $0", "i"(i64 42)
ret void
}
Compile using the following command:
llc -march=amdgcn -mcpu=gfx900 -o - test.ll
This test fails compiling and results in llvm crash:
llc: lib/Target/AMDGPU/AMDGPUGenAsmWriter.inc:32664: void
llvm::AMDGPUInstPrinter::printInstruction(const llvm::MCInst *, uint64_t, const
llvm::MCSubtargetInfo &, llvm::raw_ostream &): Assertion `Bits != 0 && "Cannot
print this instruction."' failed.
When this test is reduced to one inline assembler statement, it compiles w/o
any issues.</pre>
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