llvm/unittests/IR/UseTest.cpp

   1 //===- llvm/unittest/IR/UseTest.cpp - Use unit tests ----------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/AsmParser/Parser.h"
  10 #include "llvm/IR/Function.h"
  11 #include "llvm/IR/LLVMContext.h"
  12 #include "llvm/IR/Module.h"
  13 #include "llvm/IR/User.h"
  14 #include "llvm/Support/Format.h"
  15 #include "llvm/Support/SourceMgr.h"
  16 #include "gtest/gtest.h"
  17
  18 using namespace llvm;
  19
  20 namespace {
  21
  22 TEST(UseTest, sort) {
  23   LLVMContext C;
  24
  25   const char *ModuleString = "define void @f(i32 %x) {\n"
  26                              "entry:\n"
  27                              "  %v0 = add i32 %x, 0\n"
  28                              "  %v2 = add i32 %x, 2\n"
  29                              "  %v5 = add i32 %x, 5\n"
  30                              "  %v1 = add i32 %x, 1\n"
  31                              "  %v3 = add i32 %x, 3\n"
  32                              "  %v7 = add i32 %x, 7\n"
  33                              "  %v6 = add i32 %x, 6\n"
  34                              "  %v4 = add i32 %x, 4\n"
  35                              "  ret void\n"
  36                              "}\n";
  37   SMDiagnostic Err;
  38   char vnbuf[8];
  39   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
  40   Function *F = M->getFunction("f");
  41   ASSERT_TRUE(F);
  42   ASSERT_TRUE(F->arg_begin() != F->arg_end());
  43   Argument &X = *F->arg_begin();
  44   ASSERT_EQ("x", X.getName());
  45
  46   X.sortUseList([](const Use &L, const Use &R) {
  47     return L.getUser()->getName() < R.getUser()->getName();
  48   });
  49   unsigned I = 0;
  50   for (User *U : X.users()) {
  51     format("v%u", I++).snprint(vnbuf, sizeof(vnbuf));
  52     EXPECT_EQ(vnbuf, U->getName());
  53   }
  54   ASSERT_EQ(8u, I);
  55
  56   X.sortUseList([](const Use &L, const Use &R) {
  57     return L.getUser()->getName() > R.getUser()->getName();
  58   });
  59   I = 0;
  60   for (User *U : X.users()) {
  61     format("v%u", (7 - I++)).snprint(vnbuf, sizeof(vnbuf));
  62     EXPECT_EQ(vnbuf, U->getName());
  63   }
  64   ASSERT_EQ(8u, I);
  65 }
  66
  67 TEST(UseTest, reverse) {
  68   LLVMContext C;
  69
  70   const char *ModuleString = "define void @f(i32 %x) {\n"
  71                              "entry:\n"
  72                              "  %v0 = add i32 %x, 0\n"
  73                              "  %v2 = add i32 %x, 2\n"
  74                              "  %v5 = add i32 %x, 5\n"
  75                              "  %v1 = add i32 %x, 1\n"
  76                              "  %v3 = add i32 %x, 3\n"
  77                              "  %v7 = add i32 %x, 7\n"
  78                              "  %v6 = add i32 %x, 6\n"
  79                              "  %v4 = add i32 %x, 4\n"
  80                              "  ret void\n"
  81                              "}\n";
  82   SMDiagnostic Err;
  83   char vnbuf[8];
  84   std::unique_ptr<Module> M = parseAssemblyString(ModuleString, Err, C);
  85   Function *F = M->getFunction("f");
  86   ASSERT_TRUE(F);
  87   ASSERT_TRUE(F->arg_begin() != F->arg_end());
  88   Argument &X = *F->arg_begin();
  89   ASSERT_EQ("x", X.getName());
  90
  91   X.sortUseList([](const Use &L, const Use &R) {
  92     return L.getUser()->getName() < R.getUser()->getName();
  93   });
  94   unsigned I = 0;
  95   for (User *U : X.users()) {
  96     format("v%u", I++).snprint(vnbuf, sizeof(vnbuf));
  97     EXPECT_EQ(vnbuf, U->getName());
  98   }
  99   ASSERT_EQ(8u, I);
 100
 101   X.reverseUseList();
 102   I = 0;
 103   for (User *U : X.users()) {
 104     format("v%u", (7 - I++)).snprint(vnbuf, sizeof(vnbuf));
 105     EXPECT_EQ(vnbuf, U->getName());
 106   }
 107   ASSERT_EQ(8u, I);
 108 }
 109
 110 } // end anonymous namespace