diff options
| -rw-r--r-- | llvm/lib/Transforms/Scalar/IndVarSimplify.cpp | 3 | ||||
| -rw-r--r-- | llvm/test/Transforms/IndVarSimplify/pr24783.ll | 30 |
2 files changed, 32 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp b/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp index c9fcf8ddf56..73b8052961c 100644 --- a/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp +++ b/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp @@ -509,7 +509,8 @@ Value *IndVarSimplify::ExpandSCEVIfNeeded(SCEVExpander &Rewriter, const SCEV *S, // Before expanding S into an expensive LLVM expression, see if we can use an // already existing value as the expansion for S. if (Value *ExistingValue = Rewriter.findExistingExpansion(S, InsertPt, L)) - return ExistingValue; + if (ExistingValue->getType() == ResultTy) + return ExistingValue; // We didn't find anything, fall back to using SCEVExpander. return Rewriter.expandCodeFor(S, ResultTy, InsertPt); diff --git a/llvm/test/Transforms/IndVarSimplify/pr24783.ll b/llvm/test/Transforms/IndVarSimplify/pr24783.ll new file mode 100644 index 00000000000..637cb1e196c --- /dev/null +++ b/llvm/test/Transforms/IndVarSimplify/pr24783.ll @@ -0,0 +1,30 @@ +; RUN: opt -S -indvars < %s | FileCheck %s + +target datalayout = "E-m:e-i64:64-n32:64" +target triple = "powerpc64-unknown-linux-gnu" + +define void @f(i32* %end.s, i8** %loc, i32 %p) { +; CHECK-LABEL: @f( +entry: +; CHECK: [[P_SEXT:%[0-9a-z]+]] = sext i32 %p to i64 +; CHECK: [[END:%[0-9a-z]+]] = getelementptr i32, i32* %end.s, i64 [[P_SEXT]] + + %end = getelementptr inbounds i32, i32* %end.s, i32 %p + %init = bitcast i32* %end.s to i8* + br label %while.body.i + +while.body.i: + %ptr = phi i8* [ %ptr.inc, %while.body.i ], [ %init, %entry ] + %ptr.inc = getelementptr inbounds i8, i8* %ptr, i8 1 + %ptr.inc.cast = bitcast i8* %ptr.inc to i32* + %cmp.i = icmp eq i32* %ptr.inc.cast, %end + br i1 %cmp.i, label %loop.exit, label %while.body.i + +loop.exit: +; CHECK: loop.exit: +; CHECK: [[END_BCASTED:%[a-z0-9]+]] = bitcast i32* %scevgep to i8* +; CHECK: store i8* [[END_BCASTED]], i8** %loc + %ptr.inc.lcssa = phi i8* [ %ptr.inc, %while.body.i ] + store i8* %ptr.inc.lcssa, i8** %loc + ret void +} |
