diff options
Diffstat (limited to 'llvm/lib/Target/R600')
| -rw-r--r-- | llvm/lib/Target/R600/SIFoldOperands.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/llvm/lib/Target/R600/SIFoldOperands.cpp b/llvm/lib/Target/R600/SIFoldOperands.cpp index ddb285213d2..545905ba64e 100644 --- a/llvm/lib/Target/R600/SIFoldOperands.cpp +++ b/llvm/lib/Target/R600/SIFoldOperands.cpp @@ -138,6 +138,14 @@ bool SIFoldOperands::runOnMachineFunction(MachineFunction &MF) { continue; MachineOperand &OpToFold = MI.getOperand(1); + bool FoldingImm = OpToFold.isImm() || OpToFold.isFPImm(); + + // Folding immediates with more than one use will increase program side. + // FIXME: This will also reduce register usage, which may be better + // in some cases. A better heuristic is needed. + if (FoldingImm && !TII->isInlineConstant(OpToFold) && + !MRI.hasOneUse(MI.getOperand(0).getReg())) + continue; // FIXME: Fold operands with subregs. if (OpToFold.isReg() && @@ -158,7 +166,6 @@ bool SIFoldOperands::runOnMachineFunction(MachineFunction &MF) { continue; } - bool FoldingImm = OpToFold.isImm() || OpToFold.isFPImm(); APInt Imm; if (FoldingImm) { |
