[clang] [clang][AMDGPU] Enable module splitting by default (PR #128509)

[Joseph Huber via cfe-commits]

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@@ -708,6 +711,33 @@ void amdgpu::getAMDGPUTargetFeatures(const Driver &D,
                             options::OPT_m_amdgpu_Features_Group);
 }
 
+static unsigned getFullLTOPartitions(const Driver &D, const ArgList &Args) {
+  const Arg *A = Args.getLastArg(options::OPT_flto_partitions_EQ);
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jhuber6 wrote:

This should be `getLastArgValue` with a default of `"8"`.

https://github.com/llvm/llvm-project/pull/128509