Displaying 6 results from an estimated 6 matches for "nowrapflag".
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nowrapflags
2020 Jul 26
2
[LAA] RtCheck on pointers of different address spaces.
...-----------------------------------------------------------------------------------------------------------------------------
opt: $SRC/llvm-project/llvm/lib/Analysis/ScalarEvolution.cpp:2165: const llvm::SCEV *llvm::ScalarEvolution::getAddExpr(SmallVectorImpl<const llvm::SCEV *> &, SCEV::NoWrapFlags, unsigned int): Assertion `getEffectiveSCEVType(Ops[i]->getType()) == ETy && "SCEVAddExpr operand types don't match!"' failed.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace.
Stack dump:
0. Program arguments: $Tools/bin/opt -O...
2020 Jul 26
2
[LAA] RtCheck on pointers of different address spaces.
...-----------------------------------------------------------------------------------------------------------------------------
opt: $SRC/llvm-project/llvm/lib/Analysis/ScalarEvolution.cpp:2165: const llvm::SCEV *llvm::ScalarEvolution::getAddExpr(SmallVectorImpl<const llvm::SCEV *> &, SCEV::NoWrapFlags, unsigned int): Assertion `getEffectiveSCEVType(Ops[i]->getType()) == ETy && "SCEVAddExpr operand types don't match!"' failed.
PLEASE submit a bug report to https://bugs.llvm.org/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fbugs.llvm.org%2F&...
2013 Nov 16
0
[LLVMdev] SCEV getMulExpr() not propagating Wrap flags
...UW and NSW flags if both the
> // outer mul and the inner addrec are guaranteed to have no overflow.
> //
> // No self-wrap cannot be guaranteed after changing the step size, but
> // will be inferred if either NUW or NSW is true.
> Flags = AddRec->getNoWrapFlags(clearFlags(Flags, SCEV::FlagNW));
> const SCEV *NewRec = getAddRecExpr(NewOps, AddRecLoop, Flags);
>
> // If all of the other operands were loop invariant, we are done.
> if (Ops.size() == 1) return NewRec;
>
> I understand that you can't assume it won'...
2013 Nov 13
2
[LLVMdev] SCEV getMulExpr() not propagating Wrap flags
...w addrec. Propagate the NUW and NSW flags if both the
// outer mul and the inner addrec are guaranteed to have no overflow.
//
// No self-wrap cannot be guaranteed after changing the step size, but
// will be inferred if either NUW or NSW is true.
Flags = AddRec->getNoWrapFlags(clearFlags(Flags, SCEV::FlagNW));
const SCEV *NewRec = getAddRecExpr(NewOps, AddRecLoop, Flags);
// If all of the other operands were loop invariant, we are done.
if (Ops.size() == 1) return NewRec;
I understand that you can't assume it won't wrap around with the new
st...
2012 Dec 10
3
[LLVMdev] [PATCH] Teaching ScalarEvolution to handle IV=add(zext(trunc(IV)), Step)
...include/llvm/Analysis/ScalarEvolution.h
index 235adca..79e545d 100644
--- a/include/llvm/Analysis/ScalarEvolution.h
+++ b/include/llvm/Analysis/ScalarEvolution.h
@@ -654,6 +654,10 @@ namespace llvm {
const SCEV *getMinusSCEV(const SCEV *LHS, const SCEV *RHS,
SCEV::NoWrapFlags Flags = SCEV::FlagAnyWrap);
+ /// Return a SCEV that truncates 'V' to 'Ty' *and* then zero extends that
+ /// value back to 'V's original type.
+ const SCEV *getTruncateAndZeroExtend(const SCEV *V, Type *Ty);
+
/// getTruncateOrZeroExtend - Return a SCEV cor...
2015 Jun 10
3
[LLVMdev] Question about NoWrap flag for SCEVAddRecExpr
...e following test case:
float x[1024], y[1024];
void myloop1() {
for (long int k = 0; k < 512; k++) {
x[2*k] = x[2*k]+y[k];
}
}
Vectorization failed due to "unsafe dependent memory operation". I traced
the LoopAccessAnalysis.cpp and found the reason is the NoWrapFlag for
SCEVAddRecExpr is not set and consequently the dependence distant became
unknown.
Can anyone familiar with ScalarRevolution tell me whether this is an
expected behavior or a bug?
Tong
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