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- Remove SelectSEXTi128 from SPUISelDAGToDAG.cpp, evidently, this is redundant

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code, according to Anton (I'm not totally convinced, but we can always
  resurrect patches if we need to do so.)
- Start moving CellSPU's tests to prefer FileCheck.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79958 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Scott Michel 2009-08-24 23:57:35 +00:00
parent 9ea9fcdf65
commit f6045fe8c4
2 changed files with 5 additions and 64 deletions
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59
lib/Target/CellSPU/SPUISelDAGToDAG.cpp
View File

@ -322,9 +322,6 @@ namespace {
/// target-specific node if it hasn't already been changed.
SDNode *Select(SDValue Op);
//! Emit the instruction sequence for i128 sext
SDNode *SelectSEXTi128(SDValue &Op, EVT OpVT);
//! Emit the instruction sequence for i64 shl
SDNode *SelectSHLi64(SDValue &Op, EVT OpVT);
@ -836,10 +833,6 @@ SPUDAGToDAGISel::Select(SDValue Op) {
}
}
}
} else if (Opc == ISD::SIGN_EXTEND) {
if (OpVT == MVT::i128) {
return SelectSEXTi128(Op, OpVT);
}
} else if (Opc == ISD::SHL) {
if (OpVT == MVT::i64) {
return SelectSHLi64(Op, OpVT);
@ -963,58 +956,6 @@ SPUDAGToDAGISel::Select(SDValue Op) {
return SelectCode(Op);
}
/*!
* Emit the instruction sequence for i64 -> i128 sign extend. The basic
* algorithm is to duplicate the sign bit using rotmai to generate at
* least one byte full of sign bits. Then propagate the "sign-byte" into
* theleftmost words and the i64 into the rightmost words using shufb.
*
* @param Op The sext operand
* @param OpVT The type to extend to
* @return The SDNode with the entire instruction sequence
*/
SDNode *
SPUDAGToDAGISel::SelectSEXTi128(SDValue &Op, EVT OpVT)
{
DebugLoc dl = Op.getDebugLoc();
// Type to extend from
SDValue Op0 = Op.getOperand(0);
EVT Op0VT = Op0.getValueType();
assert((OpVT == MVT::i128 && Op0VT == MVT::i64) &&
"LowerSIGN_EXTEND: input and/or output operand have wrong size");
// Create shuffle mask
unsigned mask1 = 0x10101010; // byte 0 - 3 and 4 - 7
unsigned mask2 = 0x01020304; // byte 8 - 11
unsigned mask3 = 0x05060708; // byte 12 - 15
SDValue shufMask = CurDAG->getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
CurDAG->getConstant(mask1, MVT::i32),
CurDAG->getConstant(mask1, MVT::i32),
CurDAG->getConstant(mask2, MVT::i32),
CurDAG->getConstant(mask3, MVT::i32));
SDNode *shufMaskLoad = emitBuildVector(shufMask);
// Word wise arithmetic right shift to generate at least one byte
// that contains sign bits.
SDNode *PromoteScalar = SelectCode(CurDAG->getNode(SPUISD::PREFSLOT2VEC, dl,
MVT::v2i64, Op0, Op0));
SDNode *sraVal = SelectCode(CurDAG->getNode(ISD::SRA, dl, MVT::v2i64,
SDValue(PromoteScalar, 0),
CurDAG->getConstant(31, MVT::i32)));
// Shuffle bytes - Copy the sign bits into the upper 64 bits
// and the input value into the lower 64 bits.
SDNode *extShuffle = SelectCode(CurDAG->getNode(SPUISD::SHUFB, dl,
MVT::v2i64, Op0,
SDValue(sraVal, 0),
SDValue(shufMaskLoad, 0)));
return SelectCode(CurDAG->getNode(ISD::BIT_CONVERT, dl, MVT::i128,
SDValue(extShuffle, 0)));
}
/*!
* Emit the instruction sequence for i64 left shifts. The basic algorithm
* is to fill the bottom two word slots with zeros so that zeros are shifted

10
test/CodeGen/CellSPU/loads.ll
View File

@ -1,6 +1,4 @@
; RUN: llvm-as -o - %s | llc -march=cellspu > %t1.s
; RUN: grep {lqd.*0(\$3)} %t1.s | count 1
; RUN: grep {lqd.*16(\$3)} %t1.s | count 1
; RUN: llvm-as -o - %s | llc -march=cellspu | FileCheck %s
; ModuleID = 'loads.bc'
target datalayout = "E-p:32:32:128-f64:64:128-f32:32:128-i64:32:128-i32:32:128-i16:16:128-i8:8:128-i1:8:128-a0:0:128-v128:128:128-s0:128:128"
@ -10,11 +8,13 @@ define <4 x float> @load_v4f32_1(<4 x float>* %a) nounwind readonly {
entry:
%tmp1 = load <4 x float>* %a
ret <4 x float> %tmp1
; CHECK: lqd $3, 0($3)
}
define <4 x float> @load_v4f32_2(<4 x float>* %a) nounwind readonly {
entry:
%arrayidx = getelementptr <4 x float>* %a, i32 1 ; <<4 x float>*> [#uses=1]
%tmp1 = load <4 x float>* %arrayidx ; <<4 x float>> [#uses=1]
%arrayidx = getelementptr <4 x float>* %a, i32 1
%tmp1 = load <4 x float>* %arrayidx
ret <4 x float> %tmp1
; CHECK: lqd $3, 16($3)
}