From 4e7854407ced8e2160592675918312a20cfb7cde Mon Sep 17 00:00:00 2001 From: Alkis Evlogimenos Date: Tue, 3 Feb 2004 01:13:07 +0000 Subject: When an instruction like: A += B had both A and B virtual registers spilled, A was loaded from its stack location twice. This fixes the bug. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11093 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/MachineInstr.cpp | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'lib/CodeGen/MachineInstr.cpp') diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp index 9d7b1b2d99..869d963d53 100644 --- a/lib/CodeGen/MachineInstr.cpp +++ b/lib/CodeGen/MachineInstr.cpp @@ -27,6 +27,24 @@ namespace llvm { // extern const TargetInstrDescriptor *TargetInstrDescriptors; +bool MachineOperand::isEverUsed(const MachineInstr& mi) const +{ + for (int i = 0, e = mi.getNumOperands(); i != e; ++i) { + if (*this == mi.getOperand(i) && mi.getOperand(i).isUse()) + return true; + } + return false; +} + +bool MachineOperand::isEverDefined(const MachineInstr& mi) const +{ + for (int i = 0, e = mi.getNumOperands(); i != e; ++i) { + if (*this == mi.getOperand(i) && mi.getOperand(i).isDef()) + return true; + } + return false; +} + // Constructor for instructions with variable #operands MachineInstr::MachineInstr(MachineOpCode OpCode, unsigned numOperands) : opCode(OpCode), -- cgit v1.2.3-70-g09d2