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enhance vmcore to know that udiv's can be exact, and add a trivial

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instcombine xform to exercise this.

Nothing forms exact udivs yet though.  This is progress on PR8862



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124992 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2011-02-06 21:44:57 +00:00
parent bd75021465
commit 35bda8914c
14 changed files with 110 additions and 32 deletions
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8
include/llvm/Bitcode/LLVMBitCodes.h
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@ -199,10 +199,10 @@ namespace bitc {
OBO_NO_SIGNED_WRAP = 1
};
/// SDivOperatorOptionalFlags - Flags for serializing SDivOperator's
/// SubclassOptionalData contents.
enum SDivOperatorOptionalFlags {
SDIV_EXACT = 0
/// PossiblyExactOperatorOptionalFlags - Flags for serializing
/// PossiblyExactOperator's SubclassOptionalData contents.
enum PossiblyExactOperatorOptionalFlags {
PEO_EXACT = 0
};
// The function body block (FUNCTION_BLOCK_ID) describes function bodies. It