From c8889a9219a7d6ae96f81d020ae6d8f760e84297 Mon Sep 17 00:00:00 2001
From: Martin Kinkelin <noone@nowhere.com>
Date: Wed, 26 Aug 2020 12:30:21 +0200
Subject: [PATCH] Fix alignment issue when casting vector rvalue to static
 array

Previously, the static-array alloca wasn't suitably aligned for the
store instruction, which uses the greater vector alignment.
This has surfaced now with LLVM 11 on Win32 - this fixes dmd-testsuite's
runnable/ldc_llvm_inline_ir.d.
---
 gen/llvmhelpers.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/gen/llvmhelpers.cpp b/gen/llvmhelpers.cpp
index 6024d827d3..8b5ff3c427 100644
--- a/gen/llvmhelpers.cpp
+++ b/gen/llvmhelpers.cpp
@@ -637,8 +637,7 @@ DValue *DtoCastVector(Loc &loc, DValue *val, Type *to) {
     LLValue *vector = DtoRVal(val);
     IF_LOG Logger::cout() << "src: " << *vector << "to type: " << *tolltype
                           << " (creating temporary)\n";
-    LLValue *array = DtoAlloca(to);
-    DtoStore(vector, DtoBitCast(array, getPtrToType(vector->getType())));
+    LLValue *array = DtoAllocaDump(vector, tolltype, DtoAlignment(val->type));
     return new DLValue(to, array);
   }
   if (totype->ty == Tvector && to->size() == val->type->size()) {