allow insertion of a conditional branch with fall-through
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31095 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index b2b9d55..0cc4c39 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -374,15 +374,21 @@
const std::vector<MachineOperand> &Cond) const {
// Shouldn't be a fall through.
assert(TBB && "InsertBranch must not be told to insert a fallthrough");
-
- // Unconditional branch?
- if (FBB == 0) {
- BuildMI(&MBB, X86::JMP, 1).addMBB(TBB);
+ assert((Cond.size() == 1 || Cond.size() == 0) &&
+ "X86 branch conditions have one component!");
+
+ if (FBB == 0) { // One way branch.
+ if (Cond.empty()) {
+ // Unconditional branch?
+ BuildMI(&MBB, X86::JMP, 1).addMBB(TBB);
+ } else {
+ // Conditional branch.
+ unsigned Opc = GetCondBranchFromCond((X86::CondCode)Cond[0].getImm());
+ BuildMI(&MBB, Opc, 1).addMBB(TBB);
+ }
return;
}
- assert(Cond.size() == 1 && "X86 branch conditions have one component!");
-
// Conditional branch.
unsigned Opc = GetCondBranchFromCond((X86::CondCode)Cond[0].getImm());
BuildMI(&MBB, Opc, 1).addMBB(TBB);