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Add a missing bitcast. This code used to only handle conversions between

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i64 and f64 types, but now it also handle Neon vector types, so the f64 result
of VMOVDRR may need to be converted to a Neon type.  Radar 8084742.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105845 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson 2010-06-11 22:45:25 +00:00
parent 9a56c328b1
commit 1114f568bc
2 changed files with 21 additions and 1 deletions
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3
lib/Target/ARM/ARMISelLowering.cpp
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@ -2447,7 +2447,8 @@ static SDValue ExpandBIT_CONVERT(SDNode *N, SelectionDAG &DAG) {
DAG.getConstant(0, MVT::i32));
SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
DAG.getConstant(1, MVT::i32));
return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
return DAG.getNode(ISD::BIT_CONVERT, dl, DstVT,
DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi));
}
// Turn f64->i64 into VMOVRRD.

19
test/CodeGen/ARM/2010-06-11-vmovdrr-bitcast.ll Normal file
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@ -0,0 +1,19 @@
; RUN: llc < %s -march=arm -mattr=+neon
; Radar 8084742
%struct.__int8x8x2_t = type { [2 x <8 x i8>] }
define arm_apcscc void @foo(%struct.__int8x8x2_t* nocapture %a, i8* %b) nounwind {
entry:
%0 = bitcast %struct.__int8x8x2_t* %a to i128* ; <i128*> [#uses=1]
%srcval = load i128* %0, align 8 ; <i128> [#uses=2]
%tmp6 = trunc i128 %srcval to i64 ; <i64> [#uses=1]
%tmp8 = lshr i128 %srcval, 64 ; <i128> [#uses=1]
%tmp9 = trunc i128 %tmp8 to i64 ; <i64> [#uses=1]
%tmp16.i = bitcast i64 %tmp6 to <8 x i8> ; <<8 x i8>> [#uses=1]
%tmp20.i = bitcast i64 %tmp9 to <8 x i8> ; <<8 x i8>> [#uses=1]
tail call void @llvm.arm.neon.vst2.v8i8(i8* %b, <8 x i8> %tmp16.i, <8 x i8> %tmp20.i) nounwind
ret void
}
declare void @llvm.arm.neon.vst2.v8i8(i8*, <8 x i8>, <8 x i8>) nounwind