[PATCH] D151848: [X86, Peephole] Enable FoldImmediate for X86

[Matthias Braun via Phabricator via llvm-commits]

MatzeB added inline comments.


================
Comment at: llvm/lib/Target/X86/X86InstrInfo.cpp:4800-4816
+/// Conservatively check if there is live EFLAGS reaching MI.
+static bool LiveEFLAGS(MachineInstr *MI, const TargetRegisterInfo *TRI) {
+  MachineBasicBlock *MBB = MI->getParent();
+  MachineBasicBlock::iterator I(MI);
+  while (true) {
+    if (I == MBB->begin())
+      break;
----------------
Does `MachineBasicBlock::computeRegisterLiveness` work instead?


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D151848/new/

https://reviews.llvm.org/D151848