From: Quentin Colombet <qcolombet@apple.com>
Date: Fri, 30 Sep 2016 21:45:56 +0000 (+0000)
Subject: [AArch64][RegisterBankInfo] Use the static opds mapping for alt mappings
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=da69cdaaf8bd689f730593d10846090b4e491f4c;p=llvm

[AArch64][RegisterBankInfo] Use the static opds mapping for alt mappings

Avoid to rely on the dynamically allocated operands mapping for the
alternative mapping.
NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@282956 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/AArch64/AArch64RegisterBankInfo.cpp b/lib/Target/AArch64/AArch64RegisterBankInfo.cpp
index 90faa42010e..f3ef78384fb 100644
--- a/lib/Target/AArch64/AArch64RegisterBankInfo.cpp
+++ b/lib/Target/AArch64/AArch64RegisterBankInfo.cpp
@@ -248,20 +248,13 @@ AArch64RegisterBankInfo::getInstrAlternativeMappings(
                                   /*NumOperands*/ 3);
     InstructionMapping FPRMapping(/*ID*/ 2, /*Cost*/ 1, nullptr,
                                   /*NumOperands*/ 3);
-    GPRMapping.setOperandsMapping(getOperandsMapping(
-        {&AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
-                               AArch64::FirstGPR],
-         &AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
-                               AArch64::FirstGPR],
-         &AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
-                               AArch64::FirstGPR]}));
-    FPRMapping.setOperandsMapping(getOperandsMapping(
-        {&AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
-                               AArch64::FirstFPR],
-         &AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
-                               AArch64::FirstFPR],
-         &AArch64::ValMappings[AArch64::getRegBankBaseIdx(Size) +
-                               AArch64::FirstFPR]}));
+    unsigned RBIdx = AArch64::getRegBankBaseIdx(Size);
+    GPRMapping.setOperandsMapping(
+        &AArch64::ValMappings[AArch64::First3OpsIdx +
+                              (RBIdx + AArch64::FirstGPR) * 3]);
+    FPRMapping.setOperandsMapping(
+        &AArch64::ValMappings[AArch64::First3OpsIdx +
+                              (RBIdx + AArch64::FirstFPR) * 3]);
     AltMappings.emplace_back(std::move(GPRMapping));
     AltMappings.emplace_back(std::move(FPRMapping));
     return AltMappings;