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Remove a (what appears to be) overly strict assertion. Here is what happened:

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1. ppcf128 select is expanded to f64 select's.
2. f64 select operand 0 is an i1 truncate, it's promoted to i32 zero_extend.
3. f64 select is updated. It's changed back to a "NewNode" and being re-analyzed.
4. f64 select operands are being processed. Operand 0 is a "NewNode". It's being expunged out of ReplacedValues map.
5. ExpungeNode tries to remap f64 select and notice it's a "NewNode" and assert.
Duncan, please take a look. Thanks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60443 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-12-02 21:57:09 +00:00
parent fb10cd4901
commit 96da041949
2 changed files with 18 additions and 1 deletions
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1
lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
View File

@ -386,7 +386,6 @@ void DAGTypeLegalizer::RemapValue(SDValue &N) {
RemapValue(I->second);
N = I->second;
}
assert(N.getNode()->getNodeId() != NewNode && "Mapped to unanalyzed node!");
}
/// ExpungeNode - If N has a bogus mapping in ReplacedValues, eliminate it.

18
test/CodeGen/PowerPC/2008-12-02-LegalizeTypeAssert.ll Normal file
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@ -0,0 +1,18 @@
; RUN: llvm-as < %s | llc -mtriple=powerpc64-apple-darwin9.5
define void @__multc3({ ppc_fp128, ppc_fp128 }* noalias sret %agg.result, ppc_fp128 %a, ppc_fp128 %b, ppc_fp128 %c, ppc_fp128 %d) nounwind {
entry:
%.pre139 = and i1 false, false ; <i1> [#uses=1]
br i1 false, label %bb6, label %bb21
bb6: ; preds = %entry
%0 = tail call ppc_fp128 @copysignl(ppc_fp128 0xM00000000000000000000000000000000, ppc_fp128 %a) nounwind readnone ; <ppc_fp128> [#uses=0]
%iftmp.1.0 = select i1 %.pre139, ppc_fp128 0xM3FF00000000000000000000000000000, ppc_fp128 0xM00000000000000000000000000000000 ; <ppc_fp128> [#uses=1]
%1 = tail call ppc_fp128 @copysignl(ppc_fp128 %iftmp.1.0, ppc_fp128 %b) nounwind readnone ; <ppc_fp128> [#uses=0]
unreachable
bb21: ; preds = %entry
unreachable
}
declare ppc_fp128 @copysignl(ppc_fp128, ppc_fp128) nounwind readnone