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8276157: C2: Compiler stack overflow during escape analysis on Linux x86_32 #6167

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@@ -34,7 +34,13 @@ define_pd_global(intx, CompilerThreadStackSize, 1024);
define_pd_global(intx, ThreadStackSize, 1024); // 0 => use system default
define_pd_global(intx, VMThreadStackSize, 1024);
define_pd_global(intx, CompilerThreadStackSize, 512);
// Some tests in debug VM mode run out of compile thread stack.
// Observed on some x86_32 VarHandles tests during escape analysis.
#ifdef ASSERT
define_pd_global(intx, CompilerThreadStackSize, 768);
define_pd_global(intx, CompilerThreadStackSize, 512);
// ThreadStackSize 320 allows a couple of test cases to run while
// keeping the number of threads that can be created high. System
// default ThreadStackSize appears to be 512 which is too big.