Translation failed with union

[yjh0502]

You can get a disassembled llvm from following link: http://desti.ruree.net/core_simple.o.ll
Original source code is here: http://dosbox.svn.sourceforge.net/viewvc/dosbox/dosbox/tags/RELEASE_0_74/src/cpu/core_simple.cpp?revision=3609&view=markup

I don't know why, but it failed after long execution, and a error message is following:

Assertion failed: What variable is this? |getelementptr|
Stack: Error
    at assertTrue (utility.js:60:23)
    at getVarImpl (jsifier.js:435:5)
    at jsifier.js:636:16
    at Object.processItem (jsifier.js:495:19)
    at Object.process (framework.js:155:26)
    at framework.js:104:25
    at Array.forEach (native)
    at Object.solve (framework.js:92:27)
    at JSify (jsifier.js:792:34)
    at JSify (jsifier.js:33:15)
utility.js:61: Assertion failed: What variable is this? |getelementptr|
    throw msg;
    ^

[yjh0502]

Shorter source code. I wish it helps.

#include <stdint.h>

enum {
    REGI_AX, REGI_CX, REGI_DX, REGI_BX,
    REGI_SP, REGI_BP, REGI_SI, REGI_DI
};

union GenReg32 {
    uint32_t dword[1];
    uint16_t word[2];
    uint8_t byte[4];
};

struct CPU_Regs {
    GenReg32 regs[8];
};

CPU_Regs cpu_regs;

int main(void) {
    cpu_regs.regs[REGI_AX].word[0] = 
        cpu_regs.regs[REGI_DX].word[0];

    return 0;
}

[kripken]

Thanks for filing this issue, and especially for the reduced testcase! :)

This is fixed in commit bcdfcfb.