[LLVMbugs] [Bug 6190] New: [mips] insufficient stack space reserved

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=6190

           Summary: [mips] insufficient stack space reserved
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: ASSIGNED
          Keywords: ABI
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: bruno.cardoso at gmail.com
        ReportedBy: zhou_shuchang at sina.com
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=4154)
 --> (http://llvm.org/bugs/attachment.cgi?id=4154)
will report "Illegal instruction"

The file below will report "Illegal instruction", the ll file is attached.

#include<stdio.h>
void f(){
        printf("Hi in f\n");
}
int main()
{
        f();
        printf("Hi\n");
}

Examine the assembly, we see 

f:
        .frame  $fp,8,$ra
                    ~~ O32 ABI requires at least 16 bytes reserved for outgoing
arguments
        .mask   0xC0000000,-4
        .fmask  0x00000000,0
        .set    noreorder
        .cpload $25
        .set    nomacro
        addiu   $sp, $sp, -8
        sw      $ra, 4($sp)
        sw      $fp, 0($sp)
        addu    $fp, $sp, $zero
        .cprestore      16
         ~~~~~~~~~~~~~~~~~~ this accesses 16($sp), which is out of range.
...


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