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Don't do opportunistic ISA lightup if there are plans to run the AltJit code #110419

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merged 2 commits into from
Dec 6, 2024
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Don't do opportunistic ISA lightup if there are plans to run the AltJit code #110419

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ea29e28
Don't do opportunistic ISA lightup if there are plans to run the AltJ…
tannergooding Dec 4, 2024
a6c743d
Ensure that we can compile in Release builds
tannergooding Dec 5, 2024
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11 changes: 10 additions & 1 deletion src/coreclr/jit/compiler.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -6048,7 +6048,16 @@ int Compiler::compCompile(CORINFO_MODULE_HANDLE classPtr,
// but it requires moving the whole set of logic down into compCompileHelper after compInitOptions has
// run and we're going to end up exiting early if JIT_FLAG_ALT_JIT and opts.altJit don't match anyways

if (!info.compMatchedVM || compileFlags->IsSet(JitFlags::JIT_FLAG_ALT_JIT))
bool enableAvailableIsas = !info.compMatchedVM;

#ifdef DEBUG
if (compileFlags->IsSet(JitFlags::JIT_FLAG_ALT_JIT) && JitConfig.RunAltJitCode() == 0)
{
enableAvailableIsas = true;
}
#endif // DEBUG

if (enableAvailableIsas)
{
CORINFO_InstructionSetFlags instructionSetFlags;

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