https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99001
Bug ID: 99001
Summary: indirect modification of function parameters
Product: gcc
Version: 7.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: wolfgang.roe...@gi-de.com
Target Milestone: ---
Hi,
I would like to post a bug report for the GNU C/C++ compiler 7.5.0.
We use the compiler to generate code for a PowerPC processor.
Invokation line for the GNU C++ compiler:
ccppc -c -x c++ --std=gnu++17 -Wall -Werror -g -mcpu=e6500 -m32
-maltivec -mvrsave -ftls-model=local-exec -msdata=sysv
-fno-common -fno-openmp -mbig -mmultiple -mno-string -misel
-mstrict-align -fverbose-asm -G 8 -O3
-I<some include paths>
-D<some #define's>
X.CPP -oX.O
// file X.CPP
struct X
{
X (int& r) : rr(r) {}
~X () { rr = 0; }
int& rr;
};
int f1 (int i)
{
{ X x(i); }
return i;
}
int f2 (int i)
{
X x(i);
return i;
}
Wenn we compile this program the functions do the following:
- function f1() returns 0 - independently of the value of parameter i;
- function f2() returns the unmodified value of parameter i.
I think that the behaviour of f2() is wrong and f2() should behave as
function f1() does.
With kind regards
W. Roehrl
