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[GISel: Add support for CSEing SrcOps which are immediates

Browse Source 
https://reviews.llvm.org/D84072

Add G_EXTRACT to CSEConfigFull and add unit test as well.
This commit is contained in:
Aditya Nandakumar 2020-07-17 16:03:20 -07:00
parent cf5df40c4c
commit 63c081e73d
3 changed files with 13 additions and 0 deletions
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1
llvm/lib/CodeGen/GlobalISel/CSEInfo.cpp
View File

@ -59,6 +59,7 @@ bool CSEConfigFull::shouldCSEOpc(unsigned Opc) {
case TargetOpcode::G_UNMERGE_VALUES:
case TargetOpcode::G_TRUNC:
case TargetOpcode::G_PTR_ADD:
case TargetOpcode::G_EXTRACT:
return true;
}
return false;

3
llvm/lib/CodeGen/GlobalISel/CSEMIRBuilder.cpp
View File

@ -70,6 +70,9 @@ void CSEMIRBuilder::profileDstOp(const DstOp &Op,
void CSEMIRBuilder::profileSrcOp(const SrcOp &Op,
GISelInstProfileBuilder &B) const {
switch (Op.getSrcOpKind()) {
case SrcOp::SrcType::Ty_Imm:
B.addNodeIDImmediate(static_cast<int64_t>(Op.getImm()));
break;
case SrcOp::SrcType::Ty_Predicate:
B.addNodeIDImmediate(static_cast<int64_t>(Op.getPredicate()));
break;

9
llvm/unittests/CodeGen/GlobalISel/CSETest.cpp
View File

@ -96,6 +96,15 @@ TEST_F(AArch64GISelMITest, TestCSE) {
auto CSEFMul =
CSEB.buildInstr(TargetOpcode::G_AND, {s32}, {Copies[0], Copies[1]});
EXPECT_EQ(&*CSEFMul, &*NonCSEFMul);
auto ExtractMIB = CSEB.buildInstr(TargetOpcode::G_EXTRACT, {s16},
{Copies[0], static_cast<uint64_t>(0)});
auto ExtractMIB1 = CSEB.buildInstr(TargetOpcode::G_EXTRACT, {s16},
{Copies[0], static_cast<uint64_t>(0)});
auto ExtractMIB2 = CSEB.buildInstr(TargetOpcode::G_EXTRACT, {s16},
{Copies[0], static_cast<uint64_t>(1)});
EXPECT_EQ(&*ExtractMIB, &*ExtractMIB1);
EXPECT_NE(&*ExtractMIB, &*ExtractMIB2);
}
TEST_F(AArch64GISelMITest, TestCSEConstantConfig) {