3422 – ICE(cgcod.c) Structs with default initializers bigger than register size cannot be default parameters

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Issue 3422 - ICE(cgcod.c) Structs with default initializers bigger than register size cannot be default parameters

Summary: ICE(cgcod.c) Structs with default initializers bigger than register size cann...

Status:	RESOLVED FIXED
Alias:	None
Product:	D
Classification:	Unclassified
Component:	dmd (show other issues)
Version:	D1 (retired)
Hardware:	x86 Windows
Importance :	P2 normal
Assignee:	No Owner
URL:
Keywords:	ice-on-valid-code, patch
Depends on:
Blocks:

See Also:
Reported:	2009年10月20日 01:52 UTC by Justin Spahr-Summers
Modified:	2014年02月16日 15:23 UTC (History)
CC List:	3 users (show)

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Description Justin Spahr-Summers 2009年10月20日 01:52:50 UTC

struct S {
	// works with double and long as well
	real a = 0, b = 0;
}
void func (S s = S()) {
	writefln("hello world");
}
void main () {
	func();
}
It appears that using "= S()" as a default parameter causes a compiler error if S contains default initializers for types larger than a register (32 bits, e.g. double, real, and long).
Full compiler error is "Internal error: ..\ztc\cgcod.c 1594"

Comment 1 Don 2009年10月20日 02:09:16 UTC

This is the same as

Comment 2 Don 2009年10月20日 02:13:11 UTC

This may have the same root cause as bug 2437 and bug 2935.
It also applies to D1, at least as far back as 1.020 (but didn't compile at all in 1.010), so not a regression.

Comment 3 Don 2009年10月20日 12:19:12 UTC

The patch in bug 3426 fixes this (they are not the same bug, but are closely related).

Comment 4 Kosmonaut 2009年10月31日 21:30:25 UTC

Fixed in SVN Repository: http://www.dsource.org/projects/dmd/changeset/230

Comment 5 Walter Bright 2009年11月06日 11:31:24 UTC

Fixed dmd 1.051 and 2.036