From b4d7c09cdaa23009c785df1fc986959edee360e8 Mon Sep 17 00:00:00 2001
From: Martin Kinkelin <noone@nowhere.com>
Date: Fri, 26 Apr 2019 19:38:00 +0200
Subject: [PATCH] Fix repainting of compile-time reals for targets with 64-bit
 reals

By converting the real_t to a `double` and repainting that value.
E.g., this fixes druntime-test-hash for MSVC targets;
core.internal.hash.hashOf!(real) reinterprets a 64-bit (target) `real`
as `ulong`, and that code path is taken at CTFE too.
---
 dmd/compiler.d | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dmd/compiler.d b/dmd/compiler.d
index a349dc970a5..e697250e113 100644
--- a/dmd/compiler.d
+++ b/dmd/compiler.d
@@ -160,6 +160,9 @@ else
         case Tfloat64:
             u.float64value = cast(double) e.toReal();
             break;
+        case Tfloat80:
+            assert(e.type.size() == 8); // 64-bit target `real`
+            goto case Tfloat64;
         default:
             assert(0, "Unsupported source type");
         }
@@ -187,6 +190,10 @@ else
             emplaceExp!(RealExp)(pue, e.loc, r, type);
             break;
 
+        case Tfloat80:
+            assert(type.size() == 8); // 64-bit target `real`
+            goto case Tfloat64;
+
         default:
             assert(0, "Unsupported target type");
         }