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111
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1 /* { dg-do compile } */
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2 /* { dg-options "-O2" } */
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3
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4 /* This was causing PRE to insert the value of the ADDR variable, to
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5 remove the invariant cast but in doing so, it was creating a
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6 non-invariant expression out of the invariant one, causing a later
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7 failure in PRE. */
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8 struct sMCB {
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9 unsigned char type;
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10 };
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11
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12 extern void foo (void);
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13 unsigned char mem_readb(char *pt) __attribute__((nothrow));
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14
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15 void DOS_FreeProcessMemory(unsigned short pspseg) {
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16 while (1) {
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17 if (pspseg)
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18 foo ();
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19 char *addr = (char*)(&((sMCB*)0)->type);
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20 if (mem_readb(addr)==0x5a) break;
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21 }
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22 };
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23
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