static unsigned getRelaxedOpcode(unsigned Op) {
switch (Op) {
default: return Op;
- case ARM::tBcc: return ARM::t2Bcc;
+ case ARM::tBcc: return ARM::t2Bcc;
+ case ARM::tLDRpciASM: return ARM::t2LDRpci;
}
}
uint64_t Value,
const MCInstFragment *DF,
const MCAsmLayout &Layout) const {
- // Relaxing tBcc to t2Bcc. tBcc has a signed 9-bit displacement with the
- // low bit being an implied zero. There's an implied +4 offset for the
- // branch, so we adjust the other way here to determine what's
- // encodable.
- //
- // Relax if the value is too big for a (signed) i8.
- int64_t Offset = int64_t(Value) - 4;
- return Offset > 254 || Offset < -256;
+ switch (Fixup.getKind()) {
+ default: assert(0 && "Unexpected fixup kind in fixupNeedsRelaxation()!");
+ case ARM::fixup_arm_thumb_bcc: {
+ // Relaxing tBcc to t2Bcc. tBcc has a signed 9-bit displacement with the
+ // low bit being an implied zero. There's an implied +4 offset for the
+ // branch, so we adjust the other way here to determine what's
+ // encodable.
+ //
+ // Relax if the value is too big for a (signed) i8.
+ int64_t Offset = int64_t(Value) - 4;
+ return Offset > 254 || Offset < -256;
+ }
+ case ARM::fixup_arm_thumb_cp: {
+ int64_t Offset = int64_t(Value) - 4;
+ return Offset > 4095 || Offset < 0;
+ }
+ }
+ llvm_unreachable("Invalid switch/cash!?");
}
void ARMAsmBackend::relaxInstruction(const MCInst &Inst, MCInst &Res) const {
--- /dev/null
+@ RUN: llvm-mc -n -triple thumbv7-apple-darwin10 %s -filetype=obj -o %t.obj
+@ RUN: macho-dump --dump-section-data < %t.obj > %t.dump
+@ RUN: FileCheck < %t.dump %s
+
+ .syntax unified
+ .text
+ .thumb
+ .thumb_func _foo
+_foo:
+ ldr r2, (_foo - 4)
+
+@ CHECK: ('num_reloc', 0)
+@ CHECK: ('_section_data', '5ff80820')