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Use the proper type for shift counts. This fixes a bootstrap error.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109265 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-07-23 21:08:12 +00:00
parent f83f42599d
commit cd20c6fb18
2 changed files with 26 additions and 1 deletions
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5
lib/CodeGen/SelectionDAG/TargetLowering.cpp
View File

@ -1380,9 +1380,12 @@ bool TargetLowering::SimplifyDemandedBits(SDValue Op,
BitWidth - InnerVT.getSizeInBits()) &
DemandedMask) == 0 &&
isTypeDesirableForOp(ISD::SHL, InnerVT)) {
EVT ShTy = getShiftAmountTy();
if (!APInt(BitWidth, ShAmt).isIntN(ShTy.getSizeInBits()))
ShTy = InnerVT;
SDValue NarrowShl =
TLO.DAG.getNode(ISD::SHL, dl, InnerVT, InnerOp,
TLO.DAG.getConstant(ShAmt, InnerVT));
TLO.DAG.getConstant(ShAmt, ShTy));
return
TLO.CombineTo(Op,
TLO.DAG.getNode(ISD::ANY_EXTEND, dl, Op.getValueType(),

22
test/CodeGen/X86/shl-anyext.ll
View File

@ -16,3 +16,25 @@ if.end523: ; preds = %if.end453
store i32 %conv820, i32* %p
ret void
}
; CHECK: foo:
declare void @bar(i64)
define fastcc void @foo(i32 %t) {
bb:
%tmp = add i32 %t, -1 ; <i32> [#uses=1]
br label %bb1
bb1: ; preds = %bb
%tmp2 = zext i32 %tmp to i64 ; <i64> [#uses=2]
%tmp3 = add i64 %tmp2, 1 ; <i64> [#uses=1]
%tmp4 = xor i64 %tmp2, 536870911 ; <i64> [#uses=1]
%tmp5 = and i64 %tmp3, %tmp4 ; <i64> [#uses=1]
%tmp6 = shl i64 %tmp5, 3 ; <i64> [#uses=1]
%tmp7 = sub i64 64, %tmp6 ; <i64> [#uses=1]
%tmp8 = and i64 %tmp7, 4294967288 ; <i64> [#uses=1]
%tmp9 = lshr i64 -1, %tmp8 ; <i64> [#uses=1]
call void @bar(i64 %tmp9)
ret void
}