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codegen.c: chunk array literals at 64 elements to reduce register pressure

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Array literals were being built by loading all elements into registers
before constructing the array, requiring nregs proportional to the array
size (e.g. nregs=99 for 100 elements). This exceeds mruby/c's register
limit. Restore 3.4-era chunking at GEN_LIT_ARY_MAX (64) elements.

fixes mruby/mruby#6731

Co-authored-by: Claude <noreply@anthropic.com>
This commit is contained in:
Yukihiro "Matz" Matsumoto
2026-03-09 16:47:23 +09:00
parent 72c9e5d027
commit f98d6414dc
1 changed files with 2 additions and 2 deletions
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mrbgems/mruby-compiler/core/codegen.c
+2 -2
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@@ -3821,7 +3821,7 @@ codegen_array(codegen_scope *s, node *varnode, int val)
node *elements = array->elements;
int regular_elements = 0;
int first = 1;
int slimit = GEN_VAL_STACK_MAX;
int slimit = GEN_LIT_ARY_MAX;
if (!val) return;
@@ -3831,7 +3831,7 @@ codegen_array(codegen_scope *s, node *varnode, int val)
return;
}
if (cursp() >= GEN_LIT_ARY_MAX) slimit = INT16_MAX;
if (cursp() >= slimit) slimit = GEN_VAL_STACK_MAX;
/* Process each element using cons-list iteration, handling splats */
node *current = elements;