unittests/IR/UseTest.cpp

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