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The ANDMask node folds to a constant, and isn't the node that needs to

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have its node id set. The new and and shift nodes are the nodes that need
the IDs. This fixes PR2982.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58655 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-11-03 23:43:55 +00:00
parent b6dc9352b0
commit f6503a031e
2 changed files with 28 additions and 2 deletions
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4
lib/Target/X86/X86ISelDAGToDAG.cpp
View File

@ -993,8 +993,8 @@ bool X86DAGToDAGISel::MatchAddress(SDValue N, X86ISelAddressMode &AM,
Shift.getOperand(0), NewANDMask);
SDValue NewSHIFT = CurDAG->getNode(ISD::SHL, N.getValueType(),
NewAND, SDValue(C1, 0));
NewANDMask.getNode()->setNodeId(Shift.getNode()->getNodeId());
NewAND.getNode()->setNodeId(N.getNode()->getNodeId());
NewAND.getNode()->setNodeId(Shift.getNode()->getNodeId());
NewSHIFT.getNode()->setNodeId(N.getNode()->getNodeId());
CurDAG->ReplaceAllUsesWith(N, NewSHIFT);
AM.Scale = 1 << ShiftCst;

26
test/CodeGen/X86/pr2982.ll Normal file
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@ -0,0 +1,26 @@
; RUN: llvm-as < %s | llc -march=x86
; PR2982
target datalayout =
"e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin9.5"
@g_279 = external global i32 ; <i32*> [#uses=1]
@g_265 = external global i32 ; <i32*> [#uses=1]
@g_3 = external global i8 ; <i8*> [#uses=1]
declare i32 @rshift_u_u(...)
define void @bar() nounwind {
entry:
%0 = load i32* @g_279, align 4 ; <i32> [#uses=1]
%1 = shl i32 %0, 1 ; <i32> [#uses=1]
%2 = and i32 %1, 2 ; <i32> [#uses=1]
%3 = load i32* @g_265, align 4 ; <i32> [#uses=1]
%4 = load i8* @g_3, align 1 ; <i8> [#uses=1]
%5 = sext i8 %4 to i32 ; <i32> [#uses=1]
%6 = add i32 %2, %3 ; <i32> [#uses=1]
%7 = add i32 %6, %5 ; <i32> [#uses=1]
%8 = tail call i32 (...)* @rshift_u_u(i32 %7, i32 0) nounwind
; <i32> [#uses=0]
ret void
}