diff options
Diffstat (limited to 'lib/Target/ARM/ARMLoadStoreOptimizer.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMLoadStoreOptimizer.cpp | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp index 87a5aea025..c6afbe9336 100644 --- a/lib/Target/ARM/ARMLoadStoreOptimizer.cpp +++ b/lib/Target/ARM/ARMLoadStoreOptimizer.cpp @@ -176,13 +176,19 @@ ARMLoadStoreOpt::MergeOps(MachineBasicBlock &MBB, ARM_AM::AMSubMode Mode = ARM_AM::ia; bool isAM4 = isi32Load(Opcode) || isi32Store(Opcode); - if (isAM4 && Offset == 4) + if (isAM4 && Offset == 4) { + if (isThumb2) + // Thumb2 does not support ldmib / stmib. + return false; Mode = ARM_AM::ib; - else if (isAM4 && Offset == -4 * (int)NumRegs + 4) + } else if (isAM4 && Offset == -4 * (int)NumRegs + 4) { + if (isThumb2) + // Thumb2 does not support ldmda / stmda. + return false; Mode = ARM_AM::da; - else if (isAM4 && Offset == -4 * (int)NumRegs) + } else if (isAM4 && Offset == -4 * (int)NumRegs) { Mode = ARM_AM::db; - else if (Offset != 0) { + } else if (Offset != 0) { // If starting offset isn't zero, insert a MI to materialize a new base. // But only do so if it is cost effective, i.e. merging more than two // loads / stores. |