commit fc672b6a8b48195b7afaba6f0f9d64e579b1dc72
author Jessica Del <Jessica.Del@amd.com> Tue Feb 21 09:40:07 2023 +0100
committer Jessica Del <Jessica.Del@amd.com> Wed Feb 22 16:39:06 2023 +0100
tree a8a18597a16092aca7ec27b13a9fec53270516cf
parent 7d9d855a073a496540d4e40e67945b6f09d3aea7

[AMDGPU] Improved wide multiplies

These checks show optimized instructions if an operand is known to be
(partially) zero.

Change-Id: Ie2f6d0d3ee9d5b279d1f4c1dd0787492e39cc77a

Differential Revision: https://reviews.llvm.org/D140208

llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp

diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 6d579c5..7aa868ab 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -15,6 +15,7 @@
 #include "llvm/CodeGen/GlobalISel/LegalizerHelper.h"
 #include "llvm/CodeGen/GlobalISel/CallLowering.h"
 #include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
+#include "llvm/CodeGen/GlobalISel/GISelKnownBits.h"
 #include "llvm/CodeGen/GlobalISel/GenericMachineInstrs.h"
 #include "llvm/CodeGen/GlobalISel/LegalizerInfo.h"
 #include "llvm/CodeGen/GlobalISel/LostDebugLocObserver.h"
@@ -103,13 +104,13 @@
                                  MachineIRBuilder &Builder)
     : MIRBuilder(Builder), Observer(Observer), MRI(MF.getRegInfo()),
       LI(*MF.getSubtarget().getLegalizerInfo()),
-      TLI(*MF.getSubtarget().getTargetLowering()) { }
+      TLI(*MF.getSubtarget().getTargetLowering()), KB(nullptr) {}
 
 LegalizerHelper::LegalizerHelper(MachineFunction &MF, const LegalizerInfo &LI,
                                  GISelChangeObserver &Observer,
-                                 MachineIRBuilder &B)
-  : MIRBuilder(B), Observer(Observer), MRI(MF.getRegInfo()), LI(LI),
-    TLI(*MF.getSubtarget().getTargetLowering()) { }
+                                 MachineIRBuilder &B, GISelKnownBits *KB)
+    : MIRBuilder(B), Observer(Observer), MRI(MF.getRegInfo()), LI(LI),
+      TLI(*MF.getSubtarget().getTargetLowering()), KB(KB) {}
 
 LegalizerHelper::LegalizeResult
 LegalizerHelper::legalizeInstrStep(MachineInstr &MI,