From: Bob Wilson <bob.wilson@apple.com>
Date: Mon, 26 Apr 2010 23:20:08 +0000 (+0000)
Subject: Handle register-to-register copies within the tGPR class.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5dfa87ecc6a8b94096869ca0558c5437006d13b3;p=oota-llvm.git

Handle register-to-register copies within the tGPR class.
Radar 7896289


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102396 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/ARM/Thumb2InstrInfo.cpp b/lib/Target/ARM/Thumb2InstrInfo.cpp
index de460566931..b143bd978ba 100644
--- a/lib/Target/ARM/Thumb2InstrInfo.cpp
+++ b/lib/Target/ARM/Thumb2InstrInfo.cpp
@@ -44,18 +44,22 @@ Thumb2InstrInfo::copyRegToReg(MachineBasicBlock &MBB,
   DebugLoc DL;
   if (I != MBB.end()) DL = I->getDebugLoc();
 
-  if (DestRC == ARM::GPRRegisterClass &&
-      SrcRC == ARM::GPRRegisterClass) {
-    BuildMI(MBB, I, DL, get(ARM::tMOVgpr2gpr), DestReg).addReg(SrcReg);
-    return true;
-  } else if (DestRC == ARM::GPRRegisterClass &&
-             SrcRC == ARM::tGPRRegisterClass) {
-    BuildMI(MBB, I, DL, get(ARM::tMOVtgpr2gpr), DestReg).addReg(SrcReg);
-    return true;
-  } else if (DestRC == ARM::tGPRRegisterClass &&
-             SrcRC == ARM::GPRRegisterClass) {
-    BuildMI(MBB, I, DL, get(ARM::tMOVgpr2tgpr), DestReg).addReg(SrcReg);
-    return true;
+  if (DestRC == ARM::GPRRegisterClass) {
+    if (SrcRC == ARM::GPRRegisterClass) {
+      BuildMI(MBB, I, DL, get(ARM::tMOVgpr2gpr), DestReg).addReg(SrcReg);
+      return true;
+    } else if (SrcRC == ARM::tGPRRegisterClass) {
+      BuildMI(MBB, I, DL, get(ARM::tMOVtgpr2gpr), DestReg).addReg(SrcReg);
+      return true;
+    }
+  } else if (DestRC == ARM::tGPRRegisterClass) {
+    if (SrcRC == ARM::GPRRegisterClass) {
+      BuildMI(MBB, I, DL, get(ARM::tMOVgpr2tgpr), DestReg).addReg(SrcReg);
+      return true;
+    } else if (SrcRC == ARM::tGPRRegisterClass) {
+      BuildMI(MBB, I, DL, get(ARM::tMOVr), DestReg).addReg(SrcReg);
+      return true;
+    }
   }
 
   // Handle SPR, DPR, and QPR copies.
diff --git a/test/CodeGen/Thumb2/2010-04-26-CopyRegCrash.ll b/test/CodeGen/Thumb2/2010-04-26-CopyRegCrash.ll
new file mode 100644
index 00000000000..950b67e6a59
--- /dev/null
+++ b/test/CodeGen/Thumb2/2010-04-26-CopyRegCrash.ll
@@ -0,0 +1,73 @@
+; RUN: llc < %s -mtriple=thumbv7-apple-darwin
+; Radar 7896289
+
+target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32"
+target triple = "thumbv7-apple-darwin10"
+
+define arm_apcscc void @test(i32 %mode) nounwind optsize noinline {
+entry:
+  br i1 undef, label %return, label %bb3
+
+bb3:                                              ; preds = %entry
+  br i1 undef, label %bb15, label %bb18
+
+bb15:                                             ; preds = %bb3
+  unreachable
+
+bb18:                                             ; preds = %bb3
+  switch i32 %mode, label %return [
+    i32 0, label %bb26
+    i32 1, label %bb56
+    i32 2, label %bb107
+    i32 6, label %bb150.preheader
+    i32 9, label %bb310.preheader
+    i32 13, label %bb414.preheader
+    i32 15, label %bb468.preheader
+    i32 16, label %bb522.preheader
+  ]
+
+bb150.preheader:                                  ; preds = %bb18
+  br i1 undef, label %bb154, label %bb160
+
+bb310.preheader:                                  ; preds = %bb18
+  unreachable
+
+bb414.preheader:                                  ; preds = %bb18
+  unreachable
+
+bb468.preheader:                                  ; preds = %bb18
+  unreachable
+
+bb522.preheader:                                  ; preds = %bb18
+  unreachable
+
+bb26:                                             ; preds = %bb18
+  unreachable
+
+bb56:                                             ; preds = %bb18
+  unreachable
+
+bb107:                                            ; preds = %bb18
+  br label %bb110
+
+bb110:                                            ; preds = %bb122, %bb107
+  %asmtmp.i.i179 = tail call i16 asm "rev16 $0, $1\0A", "=l,l"(i16 undef) nounwind ; <i16> [#uses=1]
+  %asmtmp.i.i178 = tail call i16 asm "rev16 $0, $1\0A", "=l,l"(i16 %asmtmp.i.i179) nounwind ; <i16> [#uses=1]
+  store i16 %asmtmp.i.i178, i16* undef, align 2
+  br i1 undef, label %bb122, label %bb121
+
+bb121:                                            ; preds = %bb110
+  br label %bb122
+
+bb122:                                            ; preds = %bb121, %bb110
+  br label %bb110
+
+bb154:                                            ; preds = %bb150.preheader
+  unreachable
+
+bb160:                                            ; preds = %bb150.preheader
+  unreachable
+
+return:                                           ; preds = %bb18, %entry
+  ret void
+}