[llvm] 76cd11f - [DAG] Add llvm::isMinSignedConstant helper. NFC
Simon Pilgrim via llvm-commits
llvm-commits at lists.llvm.org
Fri Apr 1 09:47:45 PDT 2022
Author: Simon Pilgrim
Date: 2022-04-01T17:47:34+01:00
New Revision: 76cd11f303062bf2e8cdcbe0b4ffbe5ceab7e240
URL: https://github.com/llvm/llvm-project/commit/76cd11f303062bf2e8cdcbe0b4ffbe5ceab7e240
DIFF: https://github.com/llvm/llvm-project/commit/76cd11f303062bf2e8cdcbe0b4ffbe5ceab7e240.diff
LOG: [DAG] Add llvm::isMinSignedConstant helper. NFC
Pulled out of D122754
Added:
Modified:
llvm/include/llvm/CodeGen/SelectionDAGNodes.h
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
Removed:
################################################################################
diff --git a/llvm/include/llvm/CodeGen/SelectionDAGNodes.h b/llvm/include/llvm/CodeGen/SelectionDAGNodes.h
index f32d9eeaff6e4..6b2491358a3f0 100644
--- a/llvm/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/llvm/include/llvm/CodeGen/SelectionDAGNodes.h
@@ -1667,6 +1667,9 @@ bool isAllOnesConstant(SDValue V);
/// Returns true if \p V is a constant integer one.
bool isOneConstant(SDValue V);
+/// Returns true if \p V is a constant min signed integer value.
+bool isMinSignedConstant(SDValue V);
+
/// Return the non-bitcasted source operand of \p V if it exists.
/// If \p V is not a bitcasted value, it is returned as-is.
SDValue peekThroughBitcasts(SDValue V);
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index f8bcf0b0851c0..8f3d5fcd5b044 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -10399,6 +10399,11 @@ bool llvm::isOneConstant(SDValue V) {
return Const != nullptr && Const->isOne();
}
+bool llvm::isMinSignedConstant(SDValue V) {
+ ConstantSDNode *Const = dyn_cast<ConstantSDNode>(V);
+ return Const != nullptr && Const->isMinSignedValue();
+}
+
SDValue llvm::peekThroughBitcasts(SDValue V) {
while (V.getOpcode() == ISD::BITCAST)
V = V.getOperand(0);
diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
index f7c365cc7f46a..a9fa64e488ee9 100644
--- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -2435,9 +2435,8 @@ bool X86DAGToDAGISel::matchAddressRecursively(SDValue N, X86ISelAddressMode &AM,
// We want to look through a transform in InstCombine that
// turns 'add' with min_signed_val into 'xor', so we can treat this 'xor'
// exactly like an 'add'.
- if (auto *NC1 = dyn_cast<ConstantSDNode>(N.getOperand(1)))
- if (NC1->isMinSignedValue() && !matchAdd(N, AM, Depth))
- return false;
+ if (isMinSignedConstant(N.getOperand(1)) && !matchAdd(N, AM, Depth))
+ return false;
break;
case ISD::AND: {
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