From 8cc4fe8a10e03b6ca025e20fa6d63a4c42f44f9e Mon Sep 17 00:00:00 2001
From: MerryMage <MerryMage@users.noreply.github.com>
Date: Sat, 6 Aug 2016 17:11:22 +0100
Subject: [PATCH] BackendX64/RegAlloc: HostLocToX64 now handles XMM registers
 properly

---
 src/backend_x64/reg_alloc.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/backend_x64/reg_alloc.cpp b/src/backend_x64/reg_alloc.cpp
index 9671db28..c38e77fd 100644
--- a/src/backend_x64/reg_alloc.cpp
+++ b/src/backend_x64/reg_alloc.cpp
@@ -33,7 +33,14 @@ static Gen::OpArg ImmediateToOpArg(const IR::Value& imm) {
 static Gen::X64Reg HostLocToX64(HostLoc loc) {
     DEBUG_ASSERT(HostLocIsRegister(loc));
     // HostLoc is ordered such that the numbers line up.
-    return static_cast<Gen::X64Reg>(loc);
+    if (HostLocIsGPR(loc)) {
+        return static_cast<Gen::X64Reg>(loc);
+    }
+    if (HostLocIsXMM(loc)) {
+        return static_cast<Gen::X64Reg>(size_t(loc) - size_t(HostLoc::XMM0));
+    }
+    ASSERT_MSG(false, "This should never happen.");
+    return Gen::INVALID_REG;
 }
 
 static Gen::OpArg SpillToOpArg(HostLoc loc) {