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Mark negative-zero-to-int conversion as Inexact,

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since -0.0 can't be represented as an int.
This prevents llvm from reducing -0.0 to a
load-and-convert of int 0.  Fixes
ieee.exp/mzero[2356].c in gcc testsuite.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57224 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2008-10-07 00:40:01 +00:00
parent b5cc34d098
commit e4a4245906
1 changed files with 2 additions and 1 deletions
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3
lib/Support/APFloat.cpp
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@ -1784,7 +1784,8 @@ APFloat::convertToSignExtendedInteger(integerPart *parts, unsigned int width,
if(category == fcZero) { if(category == fcZero) {
APInt::tcSet(parts, 0, dstPartsCount); APInt::tcSet(parts, 0, dstPartsCount);
return opOK; // Negative zero can't be represented as an int.
return sign ? opInexact : opOK;
} }
src = significandParts(); src = significandParts();