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Diffstat (limited to 'llvm/lib/Target/ARM/Utils/ARMBaseInfo.cpp')
-rw-r--r--llvm/lib/Target/ARM/Utils/ARMBaseInfo.cpp31
1 files changed, 31 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/Utils/ARMBaseInfo.cpp b/llvm/lib/Target/ARM/Utils/ARMBaseInfo.cpp
index 4ace61cccd0f..3356d56481e5 100644
--- a/llvm/lib/Target/ARM/Utils/ARMBaseInfo.cpp
+++ b/llvm/lib/Target/ARM/Utils/ARMBaseInfo.cpp
@@ -15,6 +15,37 @@
using namespace llvm;
namespace llvm {
+ARM::PredBlockMask expandPredBlockMask(ARM::PredBlockMask BlockMask,
+ ARMVCC::VPTCodes Kind) {
+ using PredBlockMask = ARM::PredBlockMask;
+ assert(Kind != ARMVCC::None && "Cannot expand a mask with None!");
+ assert(countTrailingZeros((unsigned)BlockMask) != 0 &&
+ "Mask is already full");
+
+ auto ChooseMask = [&](PredBlockMask AddedThen, PredBlockMask AddedElse) {
+ return Kind == ARMVCC::Then ? AddedThen : AddedElse;
+ };
+
+ switch (BlockMask) {
+ case PredBlockMask::T:
+ return ChooseMask(PredBlockMask::TT, PredBlockMask::TE);
+ case PredBlockMask::TT:
+ return ChooseMask(PredBlockMask::TTT, PredBlockMask::TTE);
+ case PredBlockMask::TE:
+ return ChooseMask(PredBlockMask::TET, PredBlockMask::TEE);
+ case PredBlockMask::TTT:
+ return ChooseMask(PredBlockMask::TTTT, PredBlockMask::TTTE);
+ case PredBlockMask::TTE:
+ return ChooseMask(PredBlockMask::TTET, PredBlockMask::TTEE);
+ case PredBlockMask::TET:
+ return ChooseMask(PredBlockMask::TETT, PredBlockMask::TETE);
+ case PredBlockMask::TEE:
+ return ChooseMask(PredBlockMask::TEET, PredBlockMask::TEEE);
+ default:
+ llvm_unreachable("Unknown Mask");
+ }
+}
+
namespace ARMSysReg {
// lookup system register using 12-bit SYSm value.