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llvm-mirror/test/Transforms/InstSimplify/2011-10-27-BinOpCrash.ll
Duncan Sands ca325638c8 Reapply commit 143028 with a fix: the problem was casting a ConstantExpr Mul
using BinaryOperator (which only works for instructions) when it should have
been a cast to OverflowingBinaryOperator (which also works for constants).
While there, correct a few other dubious looking uses of BinaryOperator.
Thanks to Chad Rosier for the testcase.  Original commit message:
My super-optimizer noticed that we weren't folding this expression to
true: (x *nsw x) sgt 0, where x = (y | 1).  This occurs in 464.h264ref.

llvm-svn: 143125
2011-10-27 19:16:21 +00:00

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945 B
LLVM

; RUN: opt < %s -instcombine
@_ZN11xercesc_2_5L11gDigitCharsE = external constant [32 x i16], align 2
@_ZN11xercesc_2_5L10gBaseCharsE = external constant [354 x i16], align 2
@_ZN11xercesc_2_5L17gIdeographicCharsE = external constant [7 x i16], align 2
@_ZN11xercesc_2_5L15gCombiningCharsE = external constant [163 x i16], align 2
define i32 @_ZN11xercesc_2_515XMLRangeFactory11buildRangesEv(i32 %x) {
%a = add i32 %x, add (i32 add (i32 ashr (i32 add (i32 mul (i32 ptrtoint ([32 x i16]* @_ZN11xercesc_2_5L11gDigitCharsE to i32), i32 -1), i32 ptrtoint (i16* getelementptr inbounds ([32 x i16]* @_ZN11xercesc_2_5L11gDigitCharsE, i32 0, i32 30) to i32)), i32 1), i32 ashr (i32 add (i32 mul (i32 ptrtoint ([7 x i16]* @_ZN11xercesc_2_5L17gIdeographicCharsE to i32), i32 -1), i32 ptrtoint (i16* getelementptr inbounds ([7 x i16]* @_ZN11xercesc_2_5L17gIdeographicCharsE, i32 0, i32 4) to i32)), i32 1)), i32 8)
%b = add i32 %a, %x
ret i32 %b
}