[PATCH] D56477: GlobalISel: Use appropriate extension for legalizing select conditions
Matt Arsenault via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Jan 8 23:51:37 PST 2019
arsenm created this revision.
arsenm added reviewers: aemerson, aditya_nandakumar, dsanders.
Herald added subscribers: kristof.beyls, rovka, wdng.
https://reviews.llvm.org/D56477
Files:
include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h
lib/CodeGen/GlobalISel/LegalizerHelper.cpp
lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
Index: lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
===================================================================
--- lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
+++ lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
@@ -17,6 +17,7 @@
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
+#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetOpcodes.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/IR/DebugInfo.h"
@@ -342,6 +343,25 @@
return buildInstr(TargetOpcode::G_ZEXT, Res, Op);
}
+unsigned MachineIRBuilder::getBoolExtOp(bool IsVec, bool IsFP) const {
+ const auto *TLI = getMF().getSubtarget().getTargetLowering();
+ switch (TLI->getBooleanContents(IsVec, IsFP)) {
+ case TargetLoweringBase::ZeroOrNegativeOneBooleanContent:
+ return TargetOpcode::G_SEXT;
+ case TargetLoweringBase::ZeroOrOneBooleanContent:
+ return TargetOpcode::G_ZEXT;
+ default:
+ return TargetOpcode::G_ANYEXT;
+ }
+}
+
+MachineInstrBuilder MachineIRBuilder::buildBoolExt(const DstOp &Res,
+ const SrcOp &Op,
+ bool IsFP) {
+ unsigned ExtOp = getBoolExtOp(getMRI()->getType(Op.getReg()).isVector(), IsFP);
+ return buildInstr(ExtOp, Res, Op);
+}
+
MachineInstrBuilder MachineIRBuilder::buildExtOrTrunc(unsigned ExtOpc,
const DstOp &Res,
const SrcOp &Op) {
Index: lib/CodeGen/GlobalISel/LegalizerHelper.cpp
===================================================================
--- lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -843,8 +843,9 @@
widenScalarSrc(MI, WideTy, 3, TargetOpcode::G_ANYEXT);
widenScalarDst(MI, WideTy);
} else {
+ bool IsVec = MRI.getType(MI.getOperand(1).getReg()).isVector();
// Explicit extension is required here since high bits affect the result.
- widenScalarSrc(MI, WideTy, 1, TargetOpcode::G_ZEXT);
+ widenScalarSrc(MI, WideTy, 1, MIRBuilder.getBoolExtOp(IsVec, false));
}
Observer.changedInstr(MI);
return Legalized;
Index: include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h
===================================================================
--- include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h
+++ include/llvm/CodeGen/GlobalISel/MachineIRBuilder.h
@@ -215,6 +215,11 @@
return *State.MF;
}
+ const MachineFunction &getMF() const {
+ assert(State.MF && "MachineFunction is not set");
+ return *State.MF;
+ }
+
/// Getter for DebugLoc
const DebugLoc &getDL() { return State.DL; }
@@ -432,6 +437,15 @@
/// \return The newly created instruction.
MachineInstrBuilder buildSExt(const DstOp &Res, const SrcOp &Op);
+ /// \return The opcode of the extension the target wants to use for boolean
+ /// values.
+ unsigned getBoolExtOp(bool IsVec, bool IsFP) const;
+
+ // Build and insert \p Res = G_ANYEXT \p Op, \p Res = G_SEXT \p Op, or \p Res
+ // = G_ZEXT \p Op depending on how the target wants to extend boolean values.
+ MachineInstrBuilder buildBoolExt(const DstOp &Res, const SrcOp &Op,
+ bool IsFP);
+
/// Build and insert \p Res = G_ZEXT \p Op
///
/// G_ZEXT produces a register of the specified width, with bits 0 to
-------------- next part --------------
A non-text attachment was scrubbed...
Name: D56477.180795.patch
Type: text/x-patch
Size: 3471 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20190109/2975f7b6/attachment.bin>
More information about the llvm-commits
mailing list