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do not move rsp if stacksize is zero

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corey 2024-01-16 21:38:20 -06:00
parent fd1873549f
commit f168dce162
1 changed files with 2 additions and 1 deletions
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gen.c
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@ -406,7 +406,8 @@ void gen_prolog(Gen*gen,const PNode*pn,FILE*file,size_t stacksize)
if(gen->buildarch==M_X86_64)
fprintf(file,"\t%s %%%s\n",push_wordsize[which],registers_abi_wordsize[which][2]);
fprintf(file,"\t%s %%%s,%%%s\n",mov_wordsize[which],gen_sp[which],gen_bp[which]);
fprintf(file,"\t%s $%lu,%%%s\n",sub_wordsize[which],stacksize,gen_sp[which]);
if(stacksize>0)
fprintf(file,"\t%s $%lu,%%%s\n",sub_wordsize[which],stacksize,gen_sp[which]);
// Move argument variables to stack
//const char*reg_order_sysv[]={"edi","esi","edx","ecx","r8d","r9d"};