[PATCH] D38128: Handle COPYs of physregs better (regalloc hints)

[Jonas Paulsson via Phabricator via llvm-commits]

jonpa updated this revision to Diff 135790.
jonpa edited reviewers, added: robertlytton; removed: JDevlieghere, fedor.sergeev, jyknight.
jonpa added a comment.
This revision now requires review to proceed.

[XCore]  patch enabled - please review updated test and approve patch.


https://reviews.llvm.org/D38128

Files:
  lib/Target/XCore/XCoreRegisterInfo.h
  test/CodeGen/XCore/byVal.ll


Index: test/CodeGen/XCore/byVal.ll
===================================================================
--- test/CodeGen/XCore/byVal.ll
+++ test/CodeGen/XCore/byVal.ll
@@ -42,9 +42,8 @@
 ; CHECK: stw r3, sp[4]
 ; CHECK: ldw r0, r0[0]
 ; CHECK: stw r0, sp[2]
-; CHECK: ldaw r2, sp[2]
+; CHECK: ldaw r1, sp[2]
 ; CHECK: mov r0, r1
-; CHECK: mov r1, r2
 ; CHECK: bl f2
 ; CHECK: ldw lr, sp[1]
 ; CHECK: ldaw sp, sp[4]
Index: lib/Target/XCore/XCoreRegisterInfo.h
===================================================================
--- lib/Target/XCore/XCoreRegisterInfo.h
+++ lib/Target/XCore/XCoreRegisterInfo.h
@@ -33,6 +33,8 @@
 
   BitVector getReservedRegs(const MachineFunction &MF) const override;
   
+  bool enableMultipleCopyHints() const override { return true; }
+
   bool requiresRegisterScavenging(const MachineFunction &MF) const override;
 
   bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override;


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