Enable generating PPC pre-increment (r+imm) instructions by default.
It seems that this no longer causes test suite failures on PPC64 (after r157159),
and often gives a performance benefit, so it can be enabled by default.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157911 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index ce70ade..46d656c 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -51,9 +51,8 @@
ISD::ArgFlagsTy &ArgFlags,
CCState &State);
-static cl::opt<bool> EnablePPCPreinc("enable-ppc-preinc",
-cl::desc("enable preincrement load/store generation on PPC (experimental)"),
- cl::Hidden);
+static cl::opt<bool> DisablePPCPreinc("disable-ppc-preinc",
+cl::desc("disable preincrement load/store generation on PPC"), cl::Hidden);
static TargetLoweringObjectFile *CreateTLOF(const PPCTargetMachine &TM) {
if (TM.getSubtargetImpl()->isDarwin())
@@ -1084,8 +1083,7 @@
SDValue &Offset,
ISD::MemIndexedMode &AM,
SelectionDAG &DAG) const {
- // Disabled by default for now.
- if (!EnablePPCPreinc) return false;
+ if (DisablePPCPreinc) return false;
SDValue Ptr;
EVT VT;
diff --git a/test/CodeGen/PowerPC/mem_update.ll b/test/CodeGen/PowerPC/mem_update.ll
index 17e7e28..39af11a 100644
--- a/test/CodeGen/PowerPC/mem_update.ll
+++ b/test/CodeGen/PowerPC/mem_update.ll
@@ -1,6 +1,6 @@
-; RUN: llc < %s -march=ppc32 -enable-ppc-preinc | \
+; RUN: llc < %s -march=ppc32 | \
; RUN: not grep addi
-; RUN: llc < %s -march=ppc64 -enable-ppc-preinc | \
+; RUN: llc < %s -march=ppc64 | \
; RUN: not grep addi
@Glob = global i64 4
diff --git a/test/CodeGen/PowerPC/stwu8.ll b/test/CodeGen/PowerPC/stwu8.ll
index fabf763..897bfc6 100644
--- a/test/CodeGen/PowerPC/stwu8.ll
+++ b/test/CodeGen/PowerPC/stwu8.ll
@@ -1,4 +1,4 @@
-; RUN: llc -enable-ppc-preinc < %s | FileCheck %s
+; RUN: llc < %s | FileCheck %s
target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64"
target triple = "powerpc64-unknown-linux-gnu"