From cfcd0948b669d1ba7253c0410a18100c7faa25e1 Mon Sep 17 00:00:00 2001
From: gdkchan <gab.dark.100@gmail.com>
Date: Fri, 2 Aug 2019 22:39:17 -0300
Subject: [PATCH] Do not use fixed registers as spill temp

---
 ARMeilleure/CodeGen/RegisterAllocators/HybridAllocator.cs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/ARMeilleure/CodeGen/RegisterAllocators/HybridAllocator.cs b/ARMeilleure/CodeGen/RegisterAllocators/HybridAllocator.cs
index 66f0c844ea..3db58d2d40 100644
--- a/ARMeilleure/CodeGen/RegisterAllocators/HybridAllocator.cs
+++ b/ARMeilleure/CodeGen/RegisterAllocators/HybridAllocator.cs
@@ -167,8 +167,12 @@ namespace ARMeilleure.CodeGen.RegisterAllocators
                 int intCallerSavedRegisters = blkInfo.HasCall ? regMasks.IntCallerSavedRegisters : 0;
                 int vecCallerSavedRegisters = blkInfo.HasCall ? regMasks.VecCallerSavedRegisters : 0;
 
-                int intSpillTempRegisters = SelectSpillTemps(intCallerSavedRegisters, intLocalFreeRegisters);
-                int vecSpillTempRegisters = SelectSpillTemps(vecCallerSavedRegisters, vecLocalFreeRegisters);
+                int intSpillTempRegisters = SelectSpillTemps(
+                    intCallerSavedRegisters & ~blkInfo.IntFixedRegisters,
+                    intLocalFreeRegisters);
+                int vecSpillTempRegisters = SelectSpillTemps(
+                    vecCallerSavedRegisters & ~blkInfo.VecFixedRegisters,
+                    vecLocalFreeRegisters);
 
                 intLocalFreeRegisters &= ~(intSpillTempRegisters | intCallerSavedRegisters);
                 vecLocalFreeRegisters &= ~(vecSpillTempRegisters | vecCallerSavedRegisters);