1028 – Segfault using tuple inside asm code.

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Issue 1028 - Segfault using tuple inside asm code.

Summary: Segfault using tuple inside asm code.

Status:	RESOLVED FIXED
Alias:	None
Product:	D
Classification:	Unclassified
Component:	dmd (show other issues)
Version:	D1 (retired)
Hardware:	x86 Windows
Importance :	P2 normal
Assignee:	Walter Bright
URL:
Keywords:	ice-on-valid-code
Depends on:
Blocks:

See Also:
Reported:	2007年03月06日 06:09 UTC by Don
Modified:	2014年02月16日 15:22 UTC (History)
CC List:	0 users

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Description Don 2007年03月06日 06:09:19 UTC

Line (1) causes a segfault.
Line (2) causes an ICE.
Dsymbol::toSymbol() 'var1', kind = 'alias'
Assertion failure: '0' on line 103 in file 'tocsym.c'
--------
void a(X...)(X expr)
{
 alias X[0] var1;
 asm {
 fld double ptr X[0]; // (1) segfaults
 fstp double ptr var1; // (2) ICE
 }
}
void main()
{
 a(3.6);
}

Comment 1 Thomas Kühne 2007年03月11日 06:20:37 UTC

Added to DStress as
http://dstress.kuehne.cn/run/t/tuple_19_A.d

Comment 2 Don 2007年04月11日 18:40:44 UTC

The situation shown in the test case was fixed in DMD 1.011. The ICE seems to be genuinely fixed, but the segfault still occurs in slightly more complex examples. I've created issue #1125 for those.

Comment 3 Walter Bright 2007年04月11日 21:59:44 UTC

Fixed dmd 1.011
But the X[0] must be replaced with expr[0].