[llvm-commits] [llvm] r78594 - in /llvm/trunk: lib/Target/ARM/ARMISelDAGToDAG.cpp test/CodeGen/Thumb2/2009-08-10-ISelBug.ll

[Evan Cheng]

Author: evancheng
Date: Mon Aug 10 15:25:59 2009
New Revision: 78594

URL: http://llvm.org/viewvc/llvm-project?rev=78594&view=rev
Log:
Handle the constantfp created during post-legalization dag combiner phase.

Added:
    llvm/trunk/test/CodeGen/Thumb2/2009-08-10-ISelBug.ll
Modified:
    llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp

Modified: llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp?rev=78594&r1=78593&r2=78594&view=diff

==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp Mon Aug 10 15:25:59 2009
@@ -988,6 +988,24 @@
     // Other cases are autogenerated.
     break;
   }
+  case ISD::ConstantFP: {
+    ConstantFPSDNode *CFP = cast<ConstantFPSDNode>(N);
+    MVT VT = CFP->getValueType(0);
+    ConstantFP *LLVMC = const_cast<ConstantFP*>(CFP->getConstantFPValue());
+    SDValue CPIdx = CurDAG->getTargetConstantPool(LLVMC, TLI.getPointerTy());
+    SDNode *ResNode;
+    SDValue Ops[] = {
+      CPIdx, 
+      CurDAG->getTargetConstant(0, MVT::i32),
+      getAL(CurDAG),
+      CurDAG->getRegister(0, MVT::i32),
+      CurDAG->getEntryNode()
+    };
+    unsigned Opc = (VT == MVT::f32) ? ARM::FLDS : ARM::FLDD;
+    ResNode=CurDAG->getTargetNode(Opc, dl, VT, MVT::Other, Ops, 5);
+    ReplaceUses(Op, SDValue(ResNode, 0));
+    return NULL;
+  }
   case ISD::FrameIndex: {
     // Selects to ADDri FI, 0 which in turn will become ADDri SP, imm.
     int FI = cast<FrameIndexSDNode>(N)->getIndex();

Added: llvm/trunk/test/CodeGen/Thumb2/2009-08-10-ISelBug.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Thumb2/2009-08-10-ISelBug.ll?rev=78594&view=auto

==============================================================================
--- llvm/trunk/test/CodeGen/Thumb2/2009-08-10-ISelBug.ll (added)
+++ llvm/trunk/test/CodeGen/Thumb2/2009-08-10-ISelBug.ll Mon Aug 10 15:25:59 2009
@@ -0,0 +1,15 @@
+; RUN: llvm-as < %s | llc -mtriple=thumbv7-apple-darwin -mattr=+vfp2
+
+define arm_apcscc float @t1(i32 %v0) nounwind {
+entry:
+	store i32 undef, i32* undef, align 4
+	%0 = load [4 x i8]** undef, align 4		; <[4 x i8]*> [#uses=1]
+	%1 = load i8* undef, align 1		; <i8> [#uses=1]
+	%2 = zext i8 %1 to i32		; <i32> [#uses=1]
+	%3 = getelementptr [4 x i8]* %0, i32 %v0, i32 0		; <i8*> [#uses=1]
+	%4 = load i8* %3, align 1		; <i8> [#uses=1]
+	%5 = zext i8 %4 to i32		; <i32> [#uses=1]
+	%6 = sub i32 %5, %2		; <i32> [#uses=1]
+	%7 = sitofp i32 %6 to float		; <float> [#uses=1]
+	ret float %7
+}