[llvm] r190299 - XCore target: change to Sched::Source

[Robert Lytton]

Author: rlytton
Date: Mon Sep  9 05:42:05 2013
New Revision: 190299

URL: http://llvm.org/viewvc/llvm-project?rev=190299&view=rev
Log:
XCore target: change to Sched::Source

This sidesteps a bug in PrescheduleNodesWithMultipleUses() which
does not check if callResources will be affected by the transformation.

Added:
    llvm/trunk/test/CodeGen/XCore/shedulingPreference.ll
Modified:
    llvm/trunk/lib/Target/XCore/XCoreISelLowering.cpp

Modified: llvm/trunk/lib/Target/XCore/XCoreISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/XCore/XCoreISelLowering.cpp?rev=190299&r1=190298&r2=190299&view=diff
==============================================================================
--- llvm/trunk/lib/Target/XCore/XCoreISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/XCore/XCoreISelLowering.cpp Mon Sep  9 05:42:05 2013
@@ -79,7 +79,7 @@ XCoreTargetLowering::XCoreTargetLowering
 
   setStackPointerRegisterToSaveRestore(XCore::SP);
 
-  setSchedulingPreference(Sched::RegPressure);
+  setSchedulingPreference(Sched::Source);
 
   // Use i32 for setcc operations results (slt, sgt, ...).
   setBooleanContents(ZeroOrOneBooleanContent);

Added: llvm/trunk/test/CodeGen/XCore/shedulingPreference.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/XCore/shedulingPreference.ll?rev=190299&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/XCore/shedulingPreference.ll (added)
+++ llvm/trunk/test/CodeGen/XCore/shedulingPreference.ll Mon Sep  9 05:42:05 2013
@@ -0,0 +1,25 @@
+; RUN: llc < %s -march=xcore
+
+define void @f( ) {
+entry:
+
+  switch i32 undef, label %default [
+    i32 0, label %start
+  ]
+
+start:
+  br label %end
+
+default:
+  %arg = fadd double undef, undef
+  %res = call double @f2(i32 undef, double %arg, double undef)
+  br label %end
+
+end:
+  %unused = phi double [ %res, %default ], [ undef, %start ]
+
+  unreachable
+}
+
+declare double @f2(i32, double, double)
+