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annotate tests/mini/packed1.d @ 1499:df11cdec45a2
Another shot at fixing the issues with (constant) struct literals and their addresses. See DMD2682, #218, #324.
The idea is to separate the notion of const from 'this variable can always be
replaced with its initializer' in the frontend. To do that, I introduced
Declaration::isSameAsInitializer, which is overridden in VarDeclaration to
return false for constants that have a struct literal initializer.
So
{{{
const S s = S(5);
void foo() { auto ps = &s; }
// is no longer replaced by
void foo() { auto ps = &(S(5)); }
}}}
To make taking the address of a struct constant with a struct-initializer
outside of function scope possible, I made sure that AddrExp::optimize doesn't
try to run the argument's optimization with WANTinterpret - that'd again
replace the constant with a struct literal temporary.
author | Christian Kamm <kamm incasoftware de> |
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date | Sun, 14 Jun 2009 19:49:58 +0200 |
parents | cc40db549aea |
children |
rev | line source |
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445
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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1 module mini.packed1; |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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2 |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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3 extern(C) int printf(char*, ...); |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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4 |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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5 align(1) |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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6 struct PackedStruct |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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7 { |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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8 ubyte ub; |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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9 float f; |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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10 long l; |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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11 short s; |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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12 ubyte ub2; |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
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changeset
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13 short s2; |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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14 } |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
|
15 |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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16 void main() |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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17 { |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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18 PackedStruct[2] a = void; |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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19 void* begin = a.ptr; |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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20 void* end = &a[1]; |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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21 ptrdiff_t sz = end - begin; |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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22 printf("size = 18 = %u = %u\n", PackedStruct.sizeof, sz); |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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23 assert(sz == 18); |
cc40db549aea
Changed the handling of variadic intrinsics a bit.
Tomas Lindquist Olsen <tomas.l.olsen@gmail.com>
parents:
diff
changeset
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24 } |