[llvm-commits] [llvm] r74736 - in /llvm/trunk: lib/Target/ARM/ARMISelDAGToDAG.cpp lib/Target/ARM/ARMInstrThumb2.td test/CodeGen/Thumb2/thumb2-ldr_pre.ll

[Evan Cheng]

Author: evancheng
Date: Thu Jul  2 18:16:11 2009
New Revision: 74736

URL: http://llvm.org/viewvc/llvm-project?rev=74736&view=rev
Log:
Sign extending pre/post indexed loads.

Modified:
    llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp
    llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
    llvm/trunk/test/CodeGen/Thumb2/thumb2-ldr_pre.ll

Modified: llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp?rev=74736&r1=74735&r2=74736&view=diff

==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelDAGToDAG.cpp Thu Jul  2 18:16:11 2009
@@ -794,6 +794,7 @@
     return NULL;
 
   MVT LoadedVT = LD->getMemoryVT();
+  bool isSExtLd = LD->getExtensionType() == ISD::SEXTLOAD;
   SDValue Offset;
   bool isPre = (AM == ISD::PRE_INC) || (AM == ISD::PRE_DEC);
   unsigned Opcode = 0;
@@ -804,10 +805,17 @@
       Opcode = isPre ? ARM::t2LDR_PRE : ARM::t2LDR_POST;
       break;
     case MVT::i16:
-      Opcode = isPre ? ARM::t2LDRH_PRE : ARM::t2LDRH_POST;
+      if (isSExtLd)
+        Opcode = isPre ? ARM::t2LDRSH_PRE : ARM::t2LDRSH_POST;
+      else
+        Opcode = isPre ? ARM::t2LDRH_PRE : ARM::t2LDRH_POST;
       break;
     case MVT::i8:
-      Opcode = isPre ? ARM::t2LDRB_PRE : ARM::t2LDRB_POST;
+    case MVT::i1:
+      if (isSExtLd)
+        Opcode = isPre ? ARM::t2LDRSB_PRE : ARM::t2LDRSB_POST;
+      else
+        Opcode = isPre ? ARM::t2LDRB_PRE : ARM::t2LDRB_POST;
       break;
     default:
       return NULL;

Modified: llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td?rev=74736&r1=74735&r2=74736&view=diff

==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td Thu Jul  2 18:16:11 2009
@@ -579,6 +579,28 @@
                           "ldrh", " $dst, [$base], $offset", "$base = $base_wb",
                             []>;
 
+def t2LDRSB_PRE : T2Iidxldst<(outs GPR:$dst, GPR:$base_wb),
+                            (ins t2addrmode_imm8:$addr),
+                            AddrModeT2_i8, IndexModePre,
+                            "ldrsb", " $dst, $addr!", "$addr.base = $base_wb",
+                            []>;
+def t2LDRSB_POST : T2Iidxldst<(outs GPR:$dst, GPR:$base_wb),
+                            (ins GPR:$base, t2am_imm8_offset:$offset),
+                            AddrModeT2_i8, IndexModePost,
+                         "ldrsb", " $dst, [$base], $offset", "$base = $base_wb",
+                            []>;
+
+def t2LDRSH_PRE : T2Iidxldst<(outs GPR:$dst, GPR:$base_wb),
+                            (ins t2addrmode_imm8:$addr),
+                            AddrModeT2_i8, IndexModePre,
+                            "ldrsh", " $dst, $addr!", "$addr.base = $base_wb",
+                            []>;
+def t2LDRSH_POST : T2Iidxldst<(outs GPR:$dst, GPR:$base_wb),
+                            (ins GPR:$base, t2am_imm8_offset:$offset),
+                            AddrModeT2_i8, IndexModePost,
+                         "ldrsh", " $dst, [$base], $offset", "$base = $base_wb",
+                            []>;
+
 // Store
 defm t2STR   : T2I_st<"str",  BinOpFrag<(store node:$LHS, node:$RHS)>>;
 defm t2STRB  : T2I_st<"strb", BinOpFrag<(truncstorei8 node:$LHS, node:$RHS)>>;

Modified: llvm/trunk/test/CodeGen/Thumb2/thumb2-ldr_pre.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Thumb2/thumb2-ldr_pre.ll?rev=74736&r1=74735&r2=74736&view=diff

==============================================================================
--- llvm/trunk/test/CodeGen/Thumb2/thumb2-ldr_pre.ll (original)
+++ llvm/trunk/test/CodeGen/Thumb2/thumb2-ldr_pre.ll Thu Jul  2 18:16:11 2009
@@ -1,5 +1,7 @@
 ; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | \
-; RUN:   grep {ldr.*\\!} | count 2
+; RUN:   grep {ldr.*\\!} | count 3
+; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | \
+; RUN:   grep {ldrsb.*\\!} | count 1
 
 define i32* @test1(i32* %X, i32* %dest) {
         %Y = getelementptr i32* %X, i32 4               ; <i32*> [#uses=2]
@@ -17,3 +19,10 @@
         ret i32 %tmp5
 }
 
+define i8* @test3(i8* %X, i32* %dest) {
+        %tmp1 = getelementptr i8* %X, i32 4
+        %tmp2 = load i8* %tmp1
+        %tmp3 = sext i8 %tmp2 to i32
+        store i32 %tmp3, i32* %dest
+        ret i8* %tmp1
+}