From 5f72b2313dd067bba89e58207b6b90e43f3f5d65 Mon Sep 17 00:00:00 2001
From: Michael Munday <munday@ca.ibm.com>
Date: Wed, 18 Jan 2017 16:18:56 -0500
Subject: [PATCH] Remove unnecessary register moves.

---
 src/vm_s390x.dasc | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/vm_s390x.dasc b/src/vm_s390x.dasc
index 637a174b..41b11cca 100644
--- a/src/vm_s390x.dasc
+++ b/src/vm_s390x.dasc
@@ -272,12 +272,9 @@
 |.define PC_RD, -4(PC)
 |
 |.macro branchPC, reg
-|  // TODO: optimize this, was just lea PC, [PC+reg*4-BCBIAS_J*4].
-|  // Can't clobber TMPR1 or condition code.
-|  lgr TMPR0, TMPR1 // Workaround because TMPR0 == r0 and can't be used in lay.
+|  // Must not clobber condition code.
 |  sllg TMPR1, reg, 2
 |  lay PC, (-BCBIAS_J*4)(TMPR1, PC)
-|  lgr TMPR1, TMPR0
 |.endmacro
 |
 |// Set current VM state.