[llvm] 39662ab - [MIPatternMatch]: Add mi_match for MachineInstr
Petar Avramovic via llvm-commits
llvm-commits at lists.llvm.org
Tue Apr 27 02:28:41 PDT 2021
Author: Petar Avramovic
Date: 2021-04-27T11:08:16+02:00
New Revision: 39662abf720fc195b549246f32719d313f05a67f
URL: https://github.com/llvm/llvm-project/commit/39662abf720fc195b549246f32719d313f05a67f
DIFF: https://github.com/llvm/llvm-project/commit/39662abf720fc195b549246f32719d313f05a67f.diff
LOG: [MIPatternMatch]: Add mi_match for MachineInstr
This utility allows more efficient start of pattern match.
Often MachineInstr(MI) is available and instead of using
mi_match(MI.getOperand(0).getReg(), MRI, ...) followed by
MRI.getVRegDef(Reg) that gives back MI we now use
mi_match(MI, MRI, ...).
Differential Revision: https://reviews.llvm.org/D99735
Added:
Modified:
llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
llvm/unittests/CodeGen/GlobalISel/PatternMatchTest.cpp
Removed:
################################################################################
diff --git a/llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h b/llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
index e0e6eebb6859..2d08b22399fe 100644
--- a/llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
+++ b/llvm/include/llvm/CodeGen/GlobalISel/MIPatternMatch.h
@@ -25,6 +25,11 @@ bool mi_match(Reg R, const MachineRegisterInfo &MRI, Pattern &&P) {
return P.match(MRI, R);
}
+template <typename Pattern>
+bool mi_match(MachineInstr &MI, const MachineRegisterInfo &MRI, Pattern &&P) {
+ return P.match(MRI, &MI);
+}
+
// TODO: Extend for N use.
template <typename SubPatternT> struct OneUse_match {
SubPatternT SubPat;
@@ -182,6 +187,11 @@ template <> struct bind_helper<MachineInstr *> {
return true;
return false;
}
+ static bool bind(const MachineRegisterInfo &MRI, MachineInstr *&MI,
+ MachineInstr *Inst) {
+ MI = Inst;
+ return MI;
+ }
};
template <> struct bind_helper<LLT> {
diff --git a/llvm/unittests/CodeGen/GlobalISel/PatternMatchTest.cpp b/llvm/unittests/CodeGen/GlobalISel/PatternMatchTest.cpp
index 8801d37a2e14..c978b9e28344 100644
--- a/llvm/unittests/CodeGen/GlobalISel/PatternMatchTest.cpp
+++ b/llvm/unittests/CodeGen/GlobalISel/PatternMatchTest.cpp
@@ -51,6 +51,37 @@ TEST_F(AArch64GISelMITest, MatchIntConstantRegister) {
EXPECT_EQ(Src0, MIBCst.getReg(0));
}
+TEST_F(AArch64GISelMITest, MachineInstrPtrBind) {
+ setUp();
+ if (!TM)
+ return;
+ auto MIBAdd = B.buildAdd(LLT::scalar(64), Copies[0], Copies[1]);
+ // Test 'MachineInstr *' bind.
+ // Default mi_match.
+ MachineInstr *MIPtr = MIBAdd.getInstr();
+ bool match = mi_match(MIPtr, *MRI, m_GAdd(m_Reg(), m_Reg()));
+ EXPECT_TRUE(match);
+ // Specialized mi_match for MachineInstr &.
+ MachineInstr &MI = *MIBAdd.getInstr();
+ match = mi_match(MI, *MRI, m_GAdd(m_Reg(), m_Reg()));
+ EXPECT_TRUE(match);
+ // MachineInstrBuilder has automatic conversion to MachineInstr *.
+ match = mi_match(MIBAdd, *MRI, m_GAdd(m_Reg(), m_Reg()));
+ EXPECT_TRUE(match);
+ // Match instruction without def.
+ auto MIBBrcond = B.buildBrCond(Copies[0], B.getMBB());
+ MachineInstr *MatchedMI;
+ match = mi_match(MIBBrcond, *MRI, m_MInstr(MatchedMI));
+ EXPECT_TRUE(match);
+ EXPECT_TRUE(MIBBrcond.getInstr() == MatchedMI);
+ // Match instruction with two defs.
+ auto MIBUAddO =
+ B.buildUAddo(LLT::scalar(64), LLT::scalar(1), Copies[0], Copies[1]);
+ match = mi_match(MIBUAddO, *MRI, m_MInstr(MatchedMI));
+ EXPECT_TRUE(match);
+ EXPECT_TRUE(MIBUAddO.getInstr() == MatchedMI);
+}
+
TEST_F(AArch64GISelMITest, MatchBinaryOp) {
setUp();
if (!TM)
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