On the XCore the scavenging slot should be closest to the SP.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127680 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/XCore/XCoreRegisterInfo.cpp b/lib/Target/XCore/XCoreRegisterInfo.cpp
index 56c0879cc8fcde6d690e3704b6e0b3b9433421c9..0287a5135837d7cbf4c84b436a00b3c925b46d38 100644 (file)
--- a/lib/Target/XCore/XCoreRegisterInfo.cpp
+++ b/lib/Target/XCore/XCoreRegisterInfo.cpp
@@ -104,6 +104,11 @@ XCoreRegisterInfo::requiresRegisterScavenging(const MachineFunction &MF) const {
   return TFI->hasFP(MF);
 }
 
+bool
+XCoreRegisterInfo::useFPForScavengingIndex(const MachineFunction &MF) const {
+  return false;
+}
+
 // This function eliminates ADJCALLSTACKDOWN,
 // ADJCALLSTACKUP pseudo instructions
 void XCoreRegisterInfo::

diff --git a/lib/Target/XCore/XCoreRegisterInfo.h b/lib/Target/XCore/XCoreRegisterInfo.h
index 218575581d4a3e8bcc34b80c8b3488a23a076704..770483b68615805d15698b95e7d39c82471ae8e4 100644 (file)
--- a/lib/Target/XCore/XCoreRegisterInfo.h
+++ b/lib/Target/XCore/XCoreRegisterInfo.h
@@ -48,6 +48,8 @@ public:
   
   bool requiresRegisterScavenging(const MachineFunction &MF) const;
 
+  bool useFPForScavengingIndex(const MachineFunction &MF) const;
+
   void eliminateCallFramePseudoInstr(MachineFunction &MF,
                                      MachineBasicBlock &MBB,
                                      MachineBasicBlock::iterator I) const;

diff --git a/test/CodeGen/XCore/scavenging.ll b/test/CodeGen/XCore/scavenging.ll
new file mode 100644 (file)
index 0000000..3181e96
--- /dev/null
+++ b/test/CodeGen/XCore/scavenging.ll
@@ -0,0 +1,52 @@
+; RUN: llc < %s -march=xcore
+@size = global i32 0           ; <i32*> [#uses=1]
+@g0 = external global i32              ; <i32*> [#uses=2]
+@g1 = external global i32              ; <i32*> [#uses=2]
+@g2 = external global i32              ; <i32*> [#uses=2]
+@g3 = external global i32              ; <i32*> [#uses=2]
+@g4 = external global i32              ; <i32*> [#uses=2]
+@g5 = external global i32              ; <i32*> [#uses=2]
+@g6 = external global i32              ; <i32*> [#uses=2]
+@g7 = external global i32              ; <i32*> [#uses=2]
+@g8 = external global i32              ; <i32*> [#uses=2]
+@g9 = external global i32              ; <i32*> [#uses=2]
+@g10 = external global i32             ; <i32*> [#uses=2]
+@g11 = external global i32             ; <i32*> [#uses=2]
+
+define void @f() nounwind {
+entry:
+       %x = alloca [100 x i32], align 4                ; <[100 x i32]*> [#uses=2]
+       %0 = load i32* @size, align 4           ; <i32> [#uses=1]
+       %1 = alloca i32, i32 %0, align 4                ; <i32*> [#uses=1]
+       %2 = volatile load i32* @g0, align 4            ; <i32> [#uses=1]
+       %3 = volatile load i32* @g1, align 4            ; <i32> [#uses=1]
+       %4 = volatile load i32* @g2, align 4            ; <i32> [#uses=1]
+       %5 = volatile load i32* @g3, align 4            ; <i32> [#uses=1]
+       %6 = volatile load i32* @g4, align 4            ; <i32> [#uses=1]
+       %7 = volatile load i32* @g5, align 4            ; <i32> [#uses=1]
+       %8 = volatile load i32* @g6, align 4            ; <i32> [#uses=1]
+       %9 = volatile load i32* @g7, align 4            ; <i32> [#uses=1]
+       %10 = volatile load i32* @g8, align 4           ; <i32> [#uses=1]
+       %11 = volatile load i32* @g9, align 4           ; <i32> [#uses=1]
+       %12 = volatile load i32* @g10, align 4          ; <i32> [#uses=1]
+       %13 = volatile load i32* @g11, align 4          ; <i32> [#uses=2]
+       %14 = getelementptr [100 x i32]* %x, i32 0, i32 50              ; <i32*> [#uses=1]
+       store i32 %13, i32* %14, align 4
+       volatile store i32 %13, i32* @g11, align 4
+       volatile store i32 %12, i32* @g10, align 4
+       volatile store i32 %11, i32* @g9, align 4
+       volatile store i32 %10, i32* @g8, align 4
+       volatile store i32 %9, i32* @g7, align 4
+       volatile store i32 %8, i32* @g6, align 4
+       volatile store i32 %7, i32* @g5, align 4
+       volatile store i32 %6, i32* @g4, align 4
+       volatile store i32 %5, i32* @g3, align 4
+       volatile store i32 %4, i32* @g2, align 4
+       volatile store i32 %3, i32* @g1, align 4
+       volatile store i32 %2, i32* @g0, align 4
+       %x1 = getelementptr [100 x i32]* %x, i32 0, i32 0               ; <i32*> [#uses=1]
+       call void @g(i32* %x1, i32* %1) nounwind
+       ret void
+}
+
+declare void @g(i32*, i32*)