[SelectionDAG] Use KnownBits struct in DAG's computeKnownBits and simplifyDemandedBits
This patch replaces the separate APInts for KnownZero/KnownOne with a single KnownBits struct. This is similar to what was done to ValueTracking's version recently.
This is largely a mechanical transformation from KnownZero to Known.Zero.
Differential Revision: https://reviews.llvm.org/D32569
llvm-svn: 301620
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index ce74a7c..41043804b 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -68,6 +68,7 @@
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/KnownBits.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Target/TargetCallingConv.h"
#include "llvm/Target/TargetOptions.h"
@@ -4706,12 +4707,12 @@
APInt Demanded = APInt::getBitsSet(32, 8 * Offset, 8 * Offset + 8);
- APInt KnownZero, KnownOne;
+ KnownBits Known;
TargetLowering::TargetLoweringOpt TLO(DAG, !DCI.isBeforeLegalize(),
!DCI.isBeforeLegalizeOps());
const TargetLowering &TLI = DAG.getTargetLoweringInfo();
if (TLI.ShrinkDemandedConstant(Src, Demanded, TLO) ||
- TLI.SimplifyDemandedBits(Src, Demanded, KnownZero, KnownOne, TLO)) {
+ TLI.SimplifyDemandedBits(Src, Demanded, Known, TLO)) {
DCI.CommitTargetLoweringOpt(TLO);
}