[Issue 19748] New: [REG][wrong codegen] Returning 4 floats + DMD + 64-bit
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Sun Mar 17 15:13:52 UTC 2019
https://issues.dlang.org/show_bug.cgi?id=19748
Issue ID: 19748
Summary: [REG][wrong codegen] Returning 4 floats + DMD + 64-bit
Product: D
Version: D2
Hardware: x86_64
OS: Windows
Status: NEW
Severity: regression
Priority: P1
Component: dmd
Assignee: nobody at puremagic.com
Reporter: aliloko at gmail.com
Consider this file:
------------------------ repro.d -------------------------
struct A
{
float[4] array = [1, 2, 3, 4];
}
A _mm_add_ss(A a, A b) pure @safe
{
a.array[0] += b.array[0];
return a;
}
void main()
{
A a;
a = _mm_add_ss(a, a);
// this assert fails, content is [1, 2, 3, 4] instead
// This is a 2.085.0 regression
assert(a.array == [2.0f, 2, 3, 4]);
}
-----------------------------------------------------------
Build with DMD 2.085.0 on Windows:
$ dmd repro.d -O -inline -noboundscheck -m64 -inline -release -unittest
$ repro.exe
The assert fails, but it works in DMD 2.084.1
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