[AArch64] Optimise load(adr address) to ldr address

Providing that the load is known to be 4 byte aligned, we can optimise a
ldr(adr address) to just ldr address.

Differential Revision: https://reviews.llvm.org/D51030

llvm-svn: 341058

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64InstrFormats.td b/llvm/lib/Target/AArch64/AArch64InstrFormats.td
index 123cddd53ba..4e935bdc1ad 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrFormats.td
+++ b/llvm/lib/Target/AArch64/AArch64InstrFormats.td
@@ -2853,10 +2853,10 @@ def am_ldrlit : Operand<iPTR> {
   let OperandType = "OPERAND_PCREL";
 }
 
-let mayLoad = 1, mayStore = 0, hasSideEffects = 0 in
-class LoadLiteral<bits<2> opc, bit V, RegisterOperand regtype, string asm>
+let mayLoad = 1, mayStore = 0, hasSideEffects = 0, AddedComplexity = 20 in
+class LoadLiteral<bits<2> opc, bit V, RegisterOperand regtype, string asm, list<dag> pat>
     : I<(outs regtype:$Rt), (ins am_ldrlit:$label),
-        asm, "\t$Rt, $label", "", []>,
+        asm, "\t$Rt, $label", "", pat>,
       Sched<[WriteLD]> {
   bits<5> Rt;
   bits<19> label;