Subzero. ARM32. Fixes bugs uncovered by the llvm test suite.

src/IceTargetLoweringARM32.h

Index: src/IceTargetLoweringARM32.h
diff --git a/src/IceTargetLoweringARM32.h b/src/IceTargetLoweringARM32.h
index 5e1b9576ae7eb1d4cd33eacdfb6dc5163d690e6b..0be3971616f7d791cda31417f246fb13e5f30e7a 100644
--- a/src/IceTargetLoweringARM32.h
+++ b/src/IceTargetLoweringARM32.h
@@ -325,6 +325,7 @@ protected:
              CondARM32::Cond Pred = CondARM32::AL) {
     constexpr bool SetFlags = true;
     Context.insert<InstARM32Add>(Dest, Src0, Src1, Pred, SetFlags);
+    Context.insert<InstFakeUse>(Dest);

[Jim Stichnoth, 2016/03/02 22:58:30]

Optional.  This pattern might be more self-documenting like this:

  if (SetFlags)
    Context.insert<InstFakeUse>(Dest);

[John, 2016/03/02 23:02:44]

Done.

   }
   void _adc(Variable *Dest, Variable *Src0, Operand *Src1,
             CondARM32::Cond Pred = CondARM32::AL) {
@@ -395,6 +396,7 @@ protected:
              CondARM32::Cond Pred = CondARM32::AL) {
     constexpr bool SetFlags = true;
     Context.insert<InstARM32Lsl>(Dest, Src0, Src1, Pred, SetFlags);
+    Context.insert<InstFakeUse>(Dest);
   }
   void _lsr(Variable *Dest, Variable *Src0, Operand *Src1,
             CondARM32::Cond Pred = CondARM32::AL) {
@@ -711,6 +713,7 @@ protected:
              CondARM32::Cond Pred = CondARM32::AL) {
     constexpr bool SetFlags = true;
     Context.insert<InstARM32Orr>(Dest, Src0, Src1, Pred, SetFlags);
+    Context.insert<InstFakeUse>(Dest);
   }
   void _push(const VarList &Sources) { Context.insert<InstARM32Push>(Sources); }
   void _pop(const VarList &Dests) {
@@ -734,6 +737,7 @@ protected:
              CondARM32::Cond Pred = CondARM32::AL) {
     constexpr bool SetFlags = true;
     Context.insert<InstARM32Rsc>(Dest, Src0, Src1, Pred, SetFlags);
+    Context.insert<InstFakeUse>(Dest);
   }
   void _rsc(Variable *Dest, Variable *Src0, Operand *Src1,
             CondARM32::Cond Pred = CondARM32::AL) {
@@ -743,6 +747,7 @@ protected:
              CondARM32::Cond Pred = CondARM32::AL) {
     constexpr bool SetFlags = true;
     Context.insert<InstARM32Rsb>(Dest, Src0, Src1, Pred, SetFlags);
+    Context.insert<InstFakeUse>(Dest);
   }
   void _rsb(Variable *Dest, Variable *Src0, Operand *Src1,
             CondARM32::Cond Pred = CondARM32::AL) {
@@ -756,6 +761,7 @@ protected:
              CondARM32::Cond Pred = CondARM32::AL) {
     constexpr bool SetFlags = true;
     Context.insert<InstARM32Sbc>(Dest, Src0, Src1, Pred, SetFlags);
+    Context.insert<InstFakeUse>(Dest);
   }
   void _sdiv(Variable *Dest, Variable *Src0, Variable *Src1,
              CondARM32::Cond Pred = CondARM32::AL) {
@@ -788,6 +794,7 @@ protected:
              CondARM32::Cond Pred = CondARM32::AL) {
     constexpr bool SetFlags = true;
     Context.insert<InstARM32Sub>(Dest, Src0, Src1, Pred, SetFlags);
+    Context.insert<InstFakeUse>(Dest);
   }
   void _sxt(Variable *Dest, Variable *Src0,
             CondARM32::Cond Pred = CondARM32::AL) {