From b5500b9ca0102f1ccaf32f0e77e96d0739aded9b Mon Sep 17 00:00:00 2001
From: pascal <pascal@openbsd.org>
Date: Sat, 3 Sep 2016 22:46:54 +0000
Subject: Use the space freed up by sparc and zaurus to import LLVM.

ok hackroom@
---
 gnu/llvm/lib/Support/BlockFrequency.cpp | 84 +++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 gnu/llvm/lib/Support/BlockFrequency.cpp

(limited to 'gnu/llvm/lib/Support/BlockFrequency.cpp')

diff --git a/gnu/llvm/lib/Support/BlockFrequency.cpp b/gnu/llvm/lib/Support/BlockFrequency.cpp
new file mode 100644
index 00000000000..e7f3e1764c5
--- /dev/null
+++ b/gnu/llvm/lib/Support/BlockFrequency.cpp
@@ -0,0 +1,84 @@
+//====--------------- lib/Support/BlockFrequency.cpp -----------*- C++ -*-====//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements Block Frequency class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/BlockFrequency.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cassert>
+
+using namespace llvm;
+
+BlockFrequency &BlockFrequency::operator*=(BranchProbability Prob) {
+  Frequency = Prob.scale(Frequency);
+  return *this;
+}
+
+BlockFrequency BlockFrequency::operator*(BranchProbability Prob) const {
+  BlockFrequency Freq(Frequency);
+  Freq *= Prob;
+  return Freq;
+}
+
+BlockFrequency &BlockFrequency::operator/=(BranchProbability Prob) {
+  Frequency = Prob.scaleByInverse(Frequency);
+  return *this;
+}
+
+BlockFrequency BlockFrequency::operator/(BranchProbability Prob) const {
+  BlockFrequency Freq(Frequency);
+  Freq /= Prob;
+  return Freq;
+}
+
+BlockFrequency &BlockFrequency::operator+=(BlockFrequency Freq) {
+  uint64_t Before = Freq.Frequency;
+  Frequency += Freq.Frequency;
+
+  // If overflow, set frequency to the maximum value.
+  if (Frequency < Before)
+    Frequency = UINT64_MAX;
+
+  return *this;
+}
+
+BlockFrequency BlockFrequency::operator+(BlockFrequency Freq) const {
+  BlockFrequency NewFreq(Frequency);
+  NewFreq += Freq;
+  return NewFreq;
+}
+
+BlockFrequency &BlockFrequency::operator-=(BlockFrequency Freq) {
+  // If underflow, set frequency to 0.
+  if (Frequency <= Freq.Frequency)
+    Frequency = 0;
+  else
+    Frequency -= Freq.Frequency;
+  return *this;
+}
+
+BlockFrequency BlockFrequency::operator-(BlockFrequency Freq) const {
+  BlockFrequency NewFreq(Frequency);
+  NewFreq -= Freq;
+  return NewFreq;
+}
+
+BlockFrequency &BlockFrequency::operator>>=(const unsigned count) {
+  // Frequency can never be 0 by design.
+  assert(Frequency != 0);
+
+  // Shift right by count.
+  Frequency >>= count;
+
+  // Saturate to 1 if we are 0.
+  Frequency |= Frequency == 0;
+  return *this;
+}
-- 
cgit v1.2.3-59-g8ed1b