[Codegen] Set ARITH_FENCE as meta-instruction

ARITH_FENCE, which was added by https://reviews.llvm.org/D99675,
should be a meta-instruction b/c it only emits comments "ARITH_FENCE".

Reviewed By: pengfei, LuoYuanke

Differential Revision: https://reviews.llvm.org/D112127
This commit is contained in:
Shengchen Kan 2021-10-20 17:11:08 +08:00
parent c5931267db
commit edff0070a1
2 changed files with 59 additions and 0 deletions

View File

@ -1331,6 +1331,7 @@ public:
case TargetOpcode::LIFETIME_START:
case TargetOpcode::LIFETIME_END:
case TargetOpcode::PSEUDO_PROBE:
case TargetOpcode::ARITH_FENCE:
return true;
}
}

View File

@ -290,6 +290,64 @@ CHECK: %1:gpr32 = LDRWui %0, 0 :: (load (s32) from %ir.p, !alias.scope ![[MMSET0
EXPECT_TRUE(checkOutput(CheckString, Output));
}
TEST_F(MachineMetadataTest, isMetaInstruction) {
auto TM = createTargetMachine(Triple::normalize("x86_64--"), "", "");
if (!TM)
GTEST_SKIP();
StringRef MIRString = R"MIR(
--- |
define void @test0(i32 %b) {
ret void
}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "a.c", directory: "/tmp")
!2 = !{i32 7, !"Dwarf Version", i32 4}
!3 = !{i32 2, !"Debug Info Version", i32 3}
!4 = !{i32 1, !"wchar_size", i32 4}
!5 = !{i32 7, !"uwtable", i32 1}
!6 = !{i32 7, !"frame-pointer", i32 2}
!7 = !{!""}
!8 = distinct !DISubprogram(name: "test0", scope: !1, file: !1, line: 1, type: !9, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !12)
!9 = !DISubroutineType(types: !10)
!10 = !{null, !11}
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!12 = !{}
!13 = !DILocalVariable(name: "b", arg: 1, scope: !8, file: !1, line: 1, type: !11)
!14 = !DILocation(line: 1, column: 16, scope: !8)
...
---
name: test0
machineFunctionInfo
body: |
bb.0:
$rdi = IMPLICIT_DEF
KILL $rsi
CFI_INSTRUCTION undefined $rax
EH_LABEL 0
GC_LABEL 0
DBG_VALUE $rax, $noreg, !13, !DIExpression(), debug-location !14
DBG_LABEL 0
LIFETIME_START 0
LIFETIME_END 0
PSEUDO_PROBE 6699318081062747564, 1, 0, 0
$xmm0 = ARITH_FENCE $xmm0
...
)MIR";
MachineModuleInfo MMI(TM.get());
M = parseMIR(*TM, MIRString, "test0", MMI);
ASSERT_TRUE(M);
auto *MF = MMI.getMachineFunction(*M->getFunction("test0"));
auto *MBB = MF->getBlockNumbered(0);
for (auto It = MBB->begin(); It != MBB->end(); ++It) {
MachineInstr &MI = *It;
ASSERT_TRUE(MI.isMetaInstruction());
}
}
TEST_F(MachineMetadataTest, MMSlotTrackerX64) {
auto TM = createTargetMachine(Triple::normalize("x86_64--"), "", "");
if (!TM)