| Aditya Nandakumar | c8ac029 | 2019-08-06 17:18:29 +0000 | [diff] [blame] | 1 | //===- KnownBitsTest.cpp -------------------------------------------===// |
| 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 "GISelMITest.h" |
| 10 | #include "llvm/CodeGen/GlobalISel/GISelKnownBits.h" |
| 11 | #include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h" |
| 12 | |
| 13 | TEST_F(GISelMITest, TestKnownBitsCst) { |
| 14 | StringRef MIRString = " %3:_(s8) = G_CONSTANT i8 1\n" |
| 15 | " %4:_(s8) = COPY %3\n"; |
| 16 | setUp(MIRString); |
| 17 | if (!TM) |
| 18 | return; |
| 19 | unsigned CopyReg = Copies[Copies.size() - 1]; |
| 20 | MachineInstr *FinalCopy = MRI->getVRegDef(CopyReg); |
| 21 | unsigned SrcReg = FinalCopy->getOperand(1).getReg(); |
| 22 | GISelKnownBits Info(*MF); |
| 23 | KnownBits Res = Info.getKnownBits(SrcReg); |
| 24 | EXPECT_EQ((uint64_t)1, Res.One.getZExtValue()); |
| 25 | EXPECT_EQ((uint64_t)0xfe, Res.Zero.getZExtValue()); |
| 26 | } |
| Aditya Nandakumar | 55371e6 | 2019-08-12 21:28:12 +0000 | [diff] [blame^] | 27 | TEST_F(GISelMITest, TestKnownBitsPtrToIntViceVersa) { |
| 28 | StringRef MIRString = " %3:_(s16) = G_CONSTANT i16 256\n" |
| 29 | " %4:_(p0) = G_INTTOPTR %3\n" |
| 30 | " %5:_(s32) = G_PTRTOINT %4\n" |
| 31 | " %6:_(s32) = COPY %5\n"; |
| 32 | setUp(MIRString); |
| 33 | if (!TM) |
| 34 | return; |
| 35 | unsigned CopyReg = Copies[Copies.size() - 1]; |
| 36 | MachineInstr *FinalCopy = MRI->getVRegDef(CopyReg); |
| 37 | unsigned SrcReg = FinalCopy->getOperand(1).getReg(); |
| 38 | GISelKnownBits Info(*MF); |
| 39 | KnownBits Res = Info.getKnownBits(SrcReg); |
| 40 | EXPECT_EQ(256u, Res.One.getZExtValue()); |
| 41 | EXPECT_EQ(0xfffffeffu, Res.Zero.getZExtValue()); |
| 42 | } |
| Aditya Nandakumar | c8ac029 | 2019-08-06 17:18:29 +0000 | [diff] [blame] | 43 | |
| 44 | TEST_F(GISelMITest, TestKnownBits) { |
| 45 | |
| 46 | StringRef MIR = " %3:_(s32) = G_TRUNC %0\n" |
| 47 | " %4:_(s32) = G_TRUNC %1\n" |
| 48 | " %5:_(s32) = G_CONSTANT i32 5\n" |
| 49 | " %6:_(s32) = G_CONSTANT i32 24\n" |
| 50 | " %7:_(s32) = G_CONSTANT i32 28\n" |
| 51 | " %14:_(p0) = G_INTTOPTR %7\n" |
| 52 | " %16:_(s32) = G_PTRTOINT %14\n" |
| 53 | " %8:_(s32) = G_SHL %3, %5\n" |
| 54 | " %9:_(s32) = G_SHL %4, %5\n" |
| 55 | " %10:_(s32) = G_OR %8, %6\n" |
| 56 | " %11:_(s32) = G_OR %9, %16\n" |
| 57 | " %12:_(s32) = G_MUL %10, %11\n" |
| 58 | " %13:_(s32) = COPY %12\n"; |
| 59 | setUp(MIR); |
| 60 | if (!TM) |
| 61 | return; |
| 62 | unsigned CopyReg = Copies[Copies.size() - 1]; |
| 63 | MachineInstr *FinalCopy = MRI->getVRegDef(CopyReg); |
| 64 | unsigned SrcReg = FinalCopy->getOperand(1).getReg(); |
| 65 | GISelKnownBits Info(*MF); |
| 66 | KnownBits Known = Info.getKnownBits(SrcReg); |
| 67 | EXPECT_FALSE(Known.hasConflict()); |
| 68 | EXPECT_EQ(0u, Known.One.getZExtValue()); |
| 69 | EXPECT_EQ(31u, Known.Zero.getZExtValue()); |
| 70 | APInt Zeroes = Info.getKnownZeroes(SrcReg); |
| 71 | EXPECT_EQ(Known.Zero, Zeroes); |
| 72 | } |