diff options
Diffstat (limited to 'llvm/lib/CodeGen/IfConversion.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/IfConversion.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/llvm/lib/CodeGen/IfConversion.cpp b/llvm/lib/CodeGen/IfConversion.cpp index 109917ba2c0..22fe5288d8d 100644 --- a/llvm/lib/CodeGen/IfConversion.cpp +++ b/llvm/lib/CodeGen/IfConversion.cpp @@ -1689,10 +1689,15 @@ bool IfConverter::IfConvertDiamondCommon( // Remove the conditional branch from entry to the blocks. BBI.NonPredSize -= TII->RemoveBranch(*BBI.BB); - // Initialize liveins to the first BB. These are potentially redefined by - // predicated instructions. + // Initialize the Redefs: + // - BB2 live-in regs need implicit uses before being redefined by BB1 + // instructions. + // - BB1 live-out regs need implicit uses before being redefined by BB2 + // instructions. We start with BB1 live-ins so we have the live-out regs + // after tracking the BB1 instructions. Redefs.init(TRI); Redefs.addLiveIns(*BBI1->BB); + Redefs.addLiveIns(*BBI2->BB); // Remove the duplicated instructions at the beginnings of both paths. // Skip dbg_value instructions |
