[Issue 10518] New: Static SIMD vector constants cannot be defined.
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Sun Jun 30 23:50:22 PDT 2013
http://d.puremagic.com/issues/show_bug.cgi?id=10518
Summary: Static SIMD vector constants cannot be defined.
Product: D
Version: D2
Platform: All
OS/Version: All
Status: NEW
Keywords: ice
Severity: normal
Priority: P2
Component: DMD
AssignedTo: nobody at puremagic.com
ReportedBy: Marco.Leise at gmx.de
--- Comment #0 from Marco Leise <Marco.Leise at gmx.de> 2013-06-30 23:50:21 PDT ---
I've tested two ways to define a global SIMD constant and found this:
-------8<---------
import core.simd;
import std.stdio;
version (DigitalMars) { enum isDMD = true; enum isGDC = false; enum isLDC =
false; }
else version (GNU) { enum isDMD = false; enum isGDC = true; enum isLDC =
false; }
else version (LDC) { enum isDMD = false; enum isGDC = false; enum isLDC =
true; }
void main()
{
static if (!isLDC) {
// ldc: Error: expression
'cast(immutable(__vector(ubyte[16LU])))cast(ubyte)123u' is not a constant
static immutable ubyte16 vec1 = 123;
writeln(vec1.array);
}
static if (!isDMD && !isLDC && !isGDC) {
// dmd: init.c:660: virtual Expression*
ArrayInitializer::toExpression(Type*): Assertion `0' failed.
// gdc: init.c:615: virtual Expression*
ArrayInitializer::toExpression(): Assertion `0' failed.
// ldc: infinite loop
static immutable ubyte16 vec2 =
[123,123,123,123,123,123,123,123,123,123,123,123,123,123,123,123];
writeln(vec2.array);
}
}
-------->8----------
So DMD crashes when given a full initializer array, but works with a scalar.
I'd expect both to work and the array initializer be the more general case.
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