Bug 23123

Summary: c++ bit store fails on -O
Product: [Retired] Red Hat Linux Reporter: Matt Wilson <msw>
Component: gccAssignee: Jakub Jelinek <jakub>
Status: CLOSED RAWHIDE QA Contact: David Lawrence <dkl>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.0CC: blizzard
Target Milestone: ---   
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Hardware: alpha   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2001-01-02 14:04:40 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
testcase for bug none

Description Matt Wilson 2001-01-02 04:31:24 UTC 
#include <sys/types.h>
#include <stdio.h>

#define FLAG 0x00000200

class FlagTest {
public:
    int16_t mFlags;

    FlagTest (void) {
	mFlags = 0;
    }

    void SetFlag (u_int32_t flag, bool value) {
	if (value)
            mFlags |= flag;
	else
            mFlags &= ~flag;
    }

    bool GetFlag (u_int32_t flag) {
	return (mFlags & flag);
    }
};

int main (void)
{
    FlagTest test;

    printf ("initial state %d\n", test.GetFlag(FLAG));
    test.SetFlag (FLAG, 1);
    printf ("set state %d\n", test.GetFlag(FLAG));
}

[msw@pitr msw]$ gcc -O -o testcase testcase.cpp
You have mail in /home/devel/msw/
[msw@pitr msw]$ ./testcase
initial state 0
set state 0
[msw@pitr msw]$ gcc -o testcase testcase.cpp
[msw@pitr msw]$ ./testcase
initial state 0
set state 1
Comment 1 Matt Wilson 2001-01-02 04:33:02 UTC 
Created attachment 6943 [details]
testcase for bug
Comment 2 Jakub Jelinek 2001-01-02 14:04:37 UTC 
Richard fixed this, the patch is in my patchset for 2.96-70.