STATISTIC(NumCoalesces, "Number of copies coalesced");
STATISTIC(NumCSEs, "Number of common subexpression eliminated");
+static cl::opt<bool> CSEPhysDef("machine-cse-phys-defs",
+ cl::init(false), cl::Hidden);
+
namespace {
class MachineCSE : public MachineFunctionPass {
const TargetInstrInfo *TII;
// ... Unless the CS is local and it also defines the physical register
// which is not clobbered in between.
- if (PhysDef) {
+ if (PhysDef && CSEPhysDef) {
unsigned CSVN = VNT.lookup(MI);
MachineInstr *CSMI = Exps[CSVN];
if (PhysRegDefReaches(CSMI, MI, PhysDef))
+++ /dev/null
-; RUN: llc < %s -march=arm | FileCheck %s
-;rdar://8003725
-
-@G1 = external global i32
-@G2 = external global i32
-
-define i32 @f1(i32 %cond1, i32 %x1, i32 %x2, i32 %x3) {
-entry:
-; CHECK: cmp
-; CHECK: moveq
-; CHECK-NOT: cmp
-; CHECK: moveq
- %tmp1 = icmp eq i32 %cond1, 0
- %tmp2 = select i1 %tmp1, i32 %x1, i32 %x2
- %tmp3 = select i1 %tmp1, i32 %x2, i32 %x3
- %tmp4 = add i32 %tmp2, %tmp3
- ret i32 %tmp4
-}