Second attempt at make Thumb2 LEAs pseudos. This time, perform the lowering much later, which makes the entire
process cleaner.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121735 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMAsmBackend.cpp b/lib/Target/ARM/ARMAsmBackend.cpp
index cb0c543..789bae0 100644
--- a/lib/Target/ARM/ARMAsmBackend.cpp
+++ b/lib/Target/ARM/ARMAsmBackend.cpp
@@ -136,6 +136,25 @@
// Encode the immediate and shift the opcode into place.
return ARM_AM::getSOImmVal(Value) | (opc << 21);
}
+
+ case ARM::fixup_t2_adr_pcrel_12: {
+ Value -= 4;
+ unsigned opc = 0;
+ if ((int64_t)Value < 0) {
+ Value = -Value;
+ opc = 5;
+ }
+
+ uint32_t out = (opc << 21);
+ out |= (Value & 0x800) << 14;
+ out |= (Value & 0x700) << 4;
+ out |= (Value & 0x0FF);
+
+ uint64_t swapped = (out & 0xFFFF0000) >> 16;
+ swapped |= (out & 0x0000FFFF) << 16;
+ return swapped;
+ }
+
case ARM::fixup_arm_branch:
// These values don't encode the low two bits since they're always zero.
// Offset by 8 just as above.
@@ -356,6 +375,7 @@
case ARM::fixup_t2_condbranch:
case ARM::fixup_t2_uncondbranch:
case ARM::fixup_t2_pcrel_10:
+ case ARM::fixup_t2_adr_pcrel_12:
case ARM::fixup_arm_thumb_bl:
case ARM::fixup_arm_thumb_blx:
return 4;