fcf0f810ac
In HIP, the Clang driver already sets `force-import-all` when ThinLTO is enabled. As a result, all imported functions get the `available_externally` linkage. However, these functions are later removed by the `EliminateAvailableExternallyPass`, effectively undoing the forced import and eventually leading to link errors. The `EliminateAvailableExternallyPass` provides an option to convert `available_externally` functions into local functions, renaming them to avoid conflicts. This behavior is exactly what we need for HIP. This PR enables that option (`avail-extern-to-local`) alongside `force-import-all` when ThinLTO is used. With this change, ThinLTO almost works correctly on AMDGPU. The only remaining issue is an undefined reference to `__assert_fail`, but that falls outside the scope of this PR.
9 lines
248 B
Plaintext
9 lines
248 B
Plaintext
// RUN: %clang -foffload-lto=thin -nogpulib -nogpuinc %s -### 2>&1 | FileCheck %s
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// CHECK: -plugin-opt=thinlto
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// CHECK-SAME: -plugin-opt=-force-import-all
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// CHECK-SAME: -plugin-opt=-avail-extern-to-local
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int main(int, char *[]) {
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return 0;
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}
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