commit 267f21a21bee4029d4f5bda8b192abdcc8c3db36
author Kazu Hirata <kazu@google.com> Sun Aug 28 10:41:51 2022 -0700
committer Kazu Hirata <kazu@google.com> Sun Aug 28 10:41:51 2022 -0700
tree e07bd6118e63640d6203fb00ff080c95ef7961cd
parent 9861a68a7cc5825fc9e680c76dfe71cda4a3c0b9

Use std::gcd (NFC)

This patch replaces calls to greatestCommonDivisor with std::gcd where
two arguments are of the same type.  This means that
std::common_type_t of the argument type is the same as the argument
type.

We could drop calls to std::abs in some cases, but that's left for
another patch.

llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp

diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 424041c..a7d74bf 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -33,6 +33,7 @@
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetMachine.h"
+#include <numeric>
 
 #define DEBUG_TYPE "legalizer"
 
@@ -1568,7 +1569,7 @@
   // %9:_(s6) = G_MERGE_VALUES %6, %7, %7
   // %10:_(s12) = G_MERGE_VALUES %8, %9
 
-  const int GCD = greatestCommonDivisor(SrcSize, WideSize);
+  const int GCD = std::gcd(SrcSize, WideSize);
   LLT GCDTy = LLT::scalar(GCD);
 
   SmallVector<Register, 8> Parts;