- Teach TBB / TBH offset limits are 510 and 131070 respectively since the offset
is scaled by two.
- Teach GetInstSizeInBytes about TBB and TBH.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77701 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 89127ed..471da05 100644
--- a/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -446,9 +446,14 @@
case ARM::BR_JTr:
case ARM::BR_JTm:
case ARM::BR_JTadd:
- case ARM::t2BR_JT: {
+ case ARM::t2BR_JT:
+ case ARM::t2TBB:
+ case ARM::t2TBH: {
// These are jumptable branches, i.e. a branch followed by an inlined
- // jumptable. The size is 4 + 4 * number of entries.
+ // jumptable. The size is 4 + 4 * number of entries. For TBB, each
+ // entry is one byte; TBH two byte each.
+ unsigned EntrySize = (MI->getOpcode() == ARM::t2TBB)
+ ? 1 : ((MI->getOpcode() == ARM::t2TBH) ? 2 : 4);
unsigned NumOps = TID.getNumOperands();
MachineOperand JTOP =
MI->getOperand(NumOps - (TID.isPredicable() ? 3 : 2));
@@ -463,7 +468,7 @@
// FIXME: If we know the size of the function is less than (1 << 16) *2
// bytes, we can use 16-bit entries instead. Then there won't be an
// alignment issue.
- return getNumJTEntries(JT, JTI) * 4 + (IsThumb1JT ? 2 : 4);
+ return getNumJTEntries(JT, JTI) * EntrySize + (IsThumb1JT ? 2 : 4);
}
default:
// Otherwise, pseudo-instruction sizes are zero.