[Issue 7953] DMD Error: variable r used before set when compiling with -O

2017-07-18 Thread via Digitalmars-d-bugs
https://issues.dlang.org/show_bug.cgi?id=7953

Vladimir Panteleev  changed:

   What|Removed |Added

   See Also||https://issues.dlang.org/sh
   ||ow_bug.cgi?id=10540

--


[Issue 7953] DMD Error: variable r used before set when compiling with -O

2016-04-24 Thread via Digitalmars-d-bugs
https://issues.dlang.org/show_bug.cgi?id=7953

--- Comment #7 from Walter Bright  ---
(In reply to SomeDude from comment #3)
> but I can't reproduce the error message, so maybe I've overlooked something.
> However, interestingly, this compiles with -O flag and crashes the compiler
> without.
> 
> PS E:\DigitalMars\dmd2\samples> rdmd bug.d
> Internal error: ..\ztc\cg87.c 1699

This works without error in the current compiler.

--


[Issue 7953] DMD Error: variable r used before set when compiling with -O

2016-04-24 Thread via Digitalmars-d-bugs
https://issues.dlang.org/show_bug.cgi?id=7953

Walter Bright  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 CC||bugzi...@digitalmars.com
 Resolution|--- |INVALID

--- Comment #6 from Walter Bright  ---
float4 r;
...
res.ptr[4] = r.ptr[4]; // Error: variable r used before set

The error here is that there are only 4 entries in float4, and you're indexing
the 5th one. If the function is marked @safe, it won't compile.

Not a compiler bug.

--


[Issue 7953] DMD Error: variable r used before set when compiling with -O

2014-01-22 Thread d-bugmail
https://d.puremagic.com/issues/show_bug.cgi?id=7953


kekeni...@yahoo.co.jp changed:

   What|Removed |Added

   Keywords||SIMD
 CC||kekeni...@yahoo.co.jp


--- Comment #5 from kekeni...@yahoo.co.jp 2014-01-22 18:54:54 PST ---
(In reply to comment #0)
 When compiling this code with dmd -O it says:
 test.d(55) Error: variable r used before set
 i might have overlooked something, but shouldn't that compile?

I tried to test on Windows.
I suppose this is an _expected_ behavior.
Maybe, 'r.ptr[4]' and its followings lines should be 'r.ptr[0]' and so on.

Please help, SIMD expert... :)

==
Reduced Code:
//DMDFLAGS=-O -m64
import core.simd;

alias float[8] F8;
F8 simdAdd(F8 a1, F8 a2) {
F8 res;
float4 v1;
float4 v2;
float4 r;

// 0..4 OK
v1.array = a1[0..4];
v2.array = a2[0..4];
r = __simd(XMM.ADDPS, v1,v2);
res.ptr[0] = r.ptr[0];
res.ptr[1] = r.ptr[1];
res.ptr[2] = r.ptr[2];
res.ptr[3] = r.ptr[3];

// 4..8 NG
v1.array = a1[4..8];
v2.array = a2[4..8];
r = __simd(XMM.ADDPS, v1,v2);
res.ptr[4] = r.ptr[4]; // Error: variable r used before set
res.ptr[5] = r.ptr[5];
res.ptr[6] = r.ptr[6];
res.ptr[7] = r.ptr[7];

return res;
}

-- 
Configure issuemail: https://d.puremagic.com/issues/userprefs.cgi?tab=email
--- You are receiving this mail because: ---


[Issue 7953] DMD Error: variable r used before set when compiling with -O

2012-04-21 Thread d-bugmail
http://d.puremagic.com/issues/show_bug.cgi?id=7953


SomeDude lovelyd...@mailmetrash.com changed:

   What|Removed |Added

 CC||lovelyd...@mailmetrash.com


--- Comment #2 from SomeDude lovelyd...@mailmetrash.com 2012-04-21 13:56:42 
PDT ---
Please reduce your code to the minimum that shows the behaviour.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
--- You are receiving this mail because: ---


[Issue 7953] DMD Error: variable r used before set when compiling with -O

2012-04-21 Thread d-bugmail
http://d.puremagic.com/issues/show_bug.cgi?id=7953



--- Comment #3 from SomeDude lovelyd...@mailmetrash.com 2012-04-21 14:17:06 
PDT ---
I've reduced the test case to this:

import core.simd;
import std.conv;

 string gen(int D) {
string s;
s ~= r = __simd(XMM.ADDPS, v1,v2);;
return res.ptr[~to!string(0)~] = r.ptr[~to!string(0)~];;
}

T[D] simdAdd(T, int D)(T[D] a1, T[D] a2) {
T[D] res;
float4 r;
mixin(gen(D));
return res;
}

void main()
{
float[8] v1 = [1,2,3,4,1,2,3,4];
float[8] v2 = [1,2,3,4,1,2,3,4];
simdAdd(v1,v2);
}

but I can't reproduce the error message, so maybe I've overlooked something.
However, interestingly, this compiles with -O flag and crashes the compiler
without.

PS E:\DigitalMars\dmd2\samples rdmd bug.d
Internal error: ..\ztc\cg87.c 1699
PS E:\DigitalMars\dmd2\samples rdmd -O bug.d
PS E:\DigitalMars\dmd2\samples

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
--- You are receiving this mail because: ---


[Issue 7953] DMD Error: variable r used before set when compiling with -O

2012-04-21 Thread d-bugmail
http://d.puremagic.com/issues/show_bug.cgi?id=7953



--- Comment #4 from SomeDude lovelyd...@mailmetrash.com 2012-04-21 14:19:31 
PDT ---
(In reply to comment #3)
 I've reduced the test case to this:
 
 ...
 
 but I can't reproduce the error message, so maybe I've overlooked something.
 However, interestingly, this compiles with -O flag and crashes the compiler
 without.
 
 PS E:\DigitalMars\dmd2\samples rdmd bug.d
 Internal error: ..\ztc\cg87.c 1699
 PS E:\DigitalMars\dmd2\samples rdmd -O bug.d
 PS E:\DigitalMars\dmd2\samples

The ICE may be related to issue 7951.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
--- You are receiving this mail because: ---


[Issue 7953] DMD Error: variable r used before set when compiling with -O

2012-04-20 Thread d-bugmail
http://d.puremagic.com/issues/show_bug.cgi?id=7953



--- Comment #1 from Zoadian suicide...@xited.de 2012-04-20 12:32:53 PDT ---
first one:
suicide@zoaHTPC /media/code $ dmd test.d -release -noboundscheck -O
test.d(55): Error: variable r used before set


another one:
suicide@zoaHTPC /media/code $ dmd test.d -release -noboundscheck -O -inline
/usr/include/phobos2/std/datetime.d(29600): Error: variable std.path.sep is
depr
ecated
/usr/include/phobos2/std/datetime.d(29601): Error: variable std.path.sep is
depr
ecated
/usr/include/phobos2/std/path.d(2715): Error: alias std.path.onOutOfMemoryError
is deprecated

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
--- You are receiving this mail because: ---