From: tegge@flipper.pvv.unit.no (Tor Egge)
Subject: More constructor problems
Organization: ProgramVareVerkstedet - UNIT
Distribution: gnu
Date: Fri, 10 Apr 1992 18:47:56 GMT

Compiler: gcc 2.1 (m88k-dolphin-svr3)

When preparing the argument area for a function call, the same argument area is
used (and trashed) when calling a constructor, and the program dumps core (bus
error) .

Compiler: gcc 2.0 (decstation)

Probably the same thing here. (Process killed on unaligned bus access). 

- Tor Egge

---- teststruc.cc
#include <stdio.h>

class a
{
  int b,c,d;
 public:
  a(int b1,int c1,int d1);
  a(a& in);
  void print(char *pr);
};



a::a(a& in) {  b=in.b; c=in.c;  d=in.d;}

a::a(int b1,int c1,int d1) {  b=b1; c=c1; d=d1; }

void a::print(char *pr) { printf("%s:{%d,%d,%d}\n",pr,b,c,d); }

void grumble(a first,a second)
{ first.print("first"); second.print("second"); }

int main()
{ grumble(a(1,2,3),a(1,4,3)); }
----- Makefile
CC=gcc
all: teststruc
	head -10 teststruc.s
	echo running
	teststruc	
teststruc: teststruc.o
	$(CC) -o teststruc teststruc.o
teststruc.o: teststruc.s
	as teststruc.s -o teststruc.o
teststruc.s: teststruc.cc Makefile
	$(CC) -S -fomit-frame-pointer teststruc.cc
------- teststruc.s

	file	 "teststruc.cc"
data

; cc1 (2.1) arguments: -fdefer-pop -fomit-frame-pointer -fpeephole
; -ffunction-cse -fcommon -fgnu-linker -Wreturn-type -m88100 -mocs-debug-info
; -mocs-frame-position -mcheck-zero-division

gcc2_compiled.:
text
	align	 16
	global	 ___1aRT0
___1aRT0:
@Ltb0:
	or	 r13,r0,r2 ; first time, r2=r31, second time r2=r31+12
	st	 r3,r31,4
	ld	 r12,r31,4
	ld	 r11,r0,r12
	st	 r11,r0,r13 
	ld	 r12,r31,4  
	ld	 r11,r12,4
	st	 r11,r13,4 ; stomps saved version of r3
	ld	 r12,r31,4 ; now illegal value (should be equal to r3)
	ld	 r11,r12,8 ; and crash.
	st	 r11,r13,8
@L2:
	or	 r2,r0,r13
	br	 @L1
	align	 8
	br	 @L1
	align	 8
@L1:
@Lte0:
	jmp	 r1

section	 .tdesc,"x"
	word	 66,1,@Ltb0,@Lte0,0x100001f,0x0,0x1,0x8
text
	align	 16
	global	 ___1aiii
___1aiii:
@Ltb1:
	or	 r13,r0,r2
	st	 r3,r31,4
	st	 r4,r31,8
	st	 r5,r31,12
	ld	 r12,r31,4
	st	 r12,r0,r13
	ld	 r12,r31,8
	st	 r12,r13,4
	ld	 r12,r31,12
	st	 r12,r13,8
@L4:
	or	 r2,r0,r13
	br	 @L3
	align	 8
	br	 @L3
	align	 8
@L3:
@Lte1:
	jmp	 r1

section	 .tdesc,"x"
	word	 66,1,@Ltb1,@Lte1,0x100001f,0x0,0x1,0x8
text
	align	 4
@LC0:
	string	 "%s:{%d,%d,%d}\012\000"
	align	 16
	global	 _print__1aPc
_print__1aPc:
	subu	 r31,r31,48
	st	 r1,r31,36
	st	 r25,r31,32
@Ltb2:
	or	 r25,r0,r2
	st	 r3,r31,52
	or.u	 r13,r0,hi16(@LC0)
	or	 r2,r13,lo16(@LC0)
	ld	 r3,r31,52
	ld	 r4,r0,r25
	ld	 r5,r25,4
	ld	 r6,r25,8
	bsr	 _printf
@L5:
@Lte2:
	ld	 r1,r31,36
	ld	 r25,r31,32
	addu	 r31,r31,48
	jmp	 r1

section	 .tdesc,"x"
	word	 66,1,@Ltb2,@Lte2,0x100103f,0x30,0xfffffff4,0xfffffff0
text
	align	 4
@LC1:
	string	 "first\000"
	align	 4
@LC2:
	string	 "second\000"
	align	 16
	global	 _grumble__FG1aT0
_grumble__FG1aT0:
	subu	 r31,r31,48
	st	 r1,r31,36
@Ltb3:
	addu	 r12,r31,48
	or	 r2,r0,r12
	or.u	 r13,r0,hi16(@LC1)
	or	 r3,r13,lo16(@LC1)
	bsr	 _print__1aPc
	addu	 r13,r31,60
	or	 r2,r0,r13
	or.u	 r13,r0,hi16(@LC2)
	or	 r3,r13,lo16(@LC2)
	bsr	 _print__1aPc
@L6:
@Lte3:
	ld	 r1,r31,36
	addu	 r31,r31,48
	jmp	 r1

section	 .tdesc,"x"
	word	 66,1,@Ltb3,@Lte3,0x100003f,0x30,0xfffffff4,0xfffffff4
text
	align	 16
	global	 _main
_main:
	subu	 r31,r31,128
	st	 r1,r31,68
	st	 r25,r31,64
@Ltb4:
	bsr	 ___main
	addu	 r2,r31,72
	or	 r3,r0,1
	or	 r4,r0,2
	or	 r5,r0,3
	bsr	 ___1aiii
	or	 r13,r0,r2
	or	 r2,r0,r31   ; NB!
	addu	 r3,r31,72
	bsr	 ___1aRT0
	or	 r13,r0,r2
	addu	 r25,r31,12  ; NB! 
	addu	 r13,r31,88
	addu	 r12,r31,104
	or	 r10,r0,r31
	ld	 r11,r10,0
	ld	 r9,r10,4
	st	 r11,r12,0
	ld	 r11,r10,8
	st	 r9,r12,4
	st	 r11,r12,8
	or	 r2,r0,r13
	or	 r3,r0,1
	or	 r4,r0,4
	or	 r5,r0,3
	bsr	 ___1aiii
	or	 r12,r0,r2
	or	 r13,r0,r31
	addu	 r11,r31,104
	ld	 r12,r11,0
	ld	 r10,r11,4
	st	 r12,r13,0
	ld	 r12,r11,8
	st	 r10,r13,4
	st	 r12,r13,8
	addu	 r13,r31,88
	addu	 r12,r31,104
	or	 r10,r0,r31
	ld	 r11,r10,0
	ld	 r9,r10,4
	st	 r11,r12,0
	ld	 r11,r10,8
	st	 r9,r12,4
	st	 r11,r12,8
	or	 r2,r0,r25  ; NB!
	or	 r3,r0,r13
	bsr	 ___1aRT0
	or	 r12,r0,r2
	or	 r13,r0,r31
	addu	 r11,r31,104
	ld	 r12,r11,0
	ld	 r10,r11,4
	st	 r12,r13,0
	ld	 r12,r11,8
	st	 r10,r13,4
	st	 r12,r13,8
	bsr	 _grumble__FG1aT0
	or	 r2,r0,0
	br	 @L7
	align	 8
	br	 @L7
	align	 8
@L7:
@Lte4:
	ld	 r1,r31,68
	ld	 r25,r31,64
	addu	 r31,r31,128
	jmp	 r1

section	 .tdesc,"x"
	word	 66,1,@Ltb4,@Lte4,0x100103f,0x80,0xffffffc4,0xffffffc0
text
----- The End

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