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Emit correct code when making a ConstantPool entry for a vector

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constant whose component type is not a legal type for the target.
(If the target ConstantPool cannot handle this type either, it has
an opportunity to merge elements.  In practice any target with
8-bit bytes must support i8 *as data*).  7320806 (partial).



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86751 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2009-11-10 23:16:41 +00:00
parent 53bb5c95af
commit 9a645cd9d4
2 changed files with 47 additions and 2 deletions
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13
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -1813,10 +1813,19 @@ SDValue SelectionDAGLegalize::ExpandBUILD_VECTOR(SDNode *Node) {
CV.push_back(const_cast<ConstantFP *>(V->getConstantFPValue()));
} else if (ConstantSDNode *V =
dyn_cast<ConstantSDNode>(Node->getOperand(i))) {
CV.push_back(const_cast<ConstantInt *>(V->getConstantIntValue()));
if (OpVT==EltVT)
CV.push_back(const_cast<ConstantInt *>(V->getConstantIntValue()));
else {
// If OpVT and EltVT don't match, EltVT is not legal and the
// element values have been promoted/truncated earlier. Undo this;
// we don't want a v16i8 to become a v16i32 for example.
const ConstantInt *CI = V->getConstantIntValue();
CV.push_back(ConstantInt::get(EltVT.getTypeForEVT(*DAG.getContext()),
CI->getZExtValue()));
}
} else {
assert(Node->getOperand(i).getOpcode() == ISD::UNDEF);
const Type *OpNTy = OpVT.getTypeForEVT(*DAG.getContext());
const Type *OpNTy = EltVT.getTypeForEVT(*DAG.getContext());
CV.push_back(UndefValue::get(OpNTy));
}
}

36
test/CodeGen/PowerPC/vec_auto_constant.ll Normal file
View File

@ -0,0 +1,36 @@
; RUN: llc < %s -march=ppc32 -mtriple=powerpc-apple-darwin -mcpu=g5 | FileCheck %s
; Formerly produced .long, 7320806 (partial)
; CHECK: .byte 22
; CHECK: .byte 21
; CHECK: .byte 20
; CHECK: .byte 3
; CHECK: .byte 25
; CHECK: .byte 24
; CHECK: .byte 23
; CHECK: .byte 3
; CHECK: .byte 28
; CHECK: .byte 27
; CHECK: .byte 26
; CHECK: .byte 3
; CHECK: .byte 31
; CHECK: .byte 30
; CHECK: .byte 29
; CHECK: .byte 3
@baz = common global <16 x i8> zeroinitializer ; <<16 x i8>*> [#uses=1]
define void @foo(<16 x i8> %x) nounwind ssp {
entry:
%x_addr = alloca <16 x i8> ; <<16 x i8>*> [#uses=2]
%temp = alloca <16 x i8> ; <<16 x i8>*> [#uses=2]
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
store <16 x i8> %x, <16 x i8>* %x_addr
store <16 x i8> <i8 22, i8 21, i8 20, i8 3, i8 25, i8 24, i8 23, i8 3, i8 28, i8 27, i8 26, i8 3, i8 31, i8 30, i8 29, i8 3>, <16 x i8>* %temp, align 16
%0 = load <16 x i8>* %x_addr, align 16 ; <<16 x i8>> [#uses=1]
%1 = load <16 x i8>* %temp, align 16 ; <<16 x i8>> [#uses=1]
%tmp = add <16 x i8> %0, %1 ; <<16 x i8>> [#uses=1]
store <16 x i8> %tmp, <16 x i8>* @baz, align 16
br label %return
return: ; preds = %entry
ret void
}