diff options
| -rw-r--r-- | lib/Analysis/ScalarEvolution.cpp | 2 | ||||
| -rw-r--r-- | test/Analysis/ScalarEvolution/sext-inreg.ll | 29 |
2 files changed, 30 insertions, 1 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index ace063a399..0aa673f355 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/lib/Analysis/ScalarEvolution.cpp @@ -2015,7 +2015,7 @@ SCEVHandle ScalarEvolutionsImpl::createSCEV(Value *V) { if (Instruction *L = dyn_cast<Instruction>(U->getOperand(0))) if (L->getOpcode() == Instruction::Shl && L->getOperand(1) == U->getOperand(1)) { - uint64_t Amt = CI->getZExtValue(); + uint64_t Amt = getTypeSizeInBits(U->getType()) - CI->getZExtValue(); return SE.getSignExtendExpr(SE.getTruncateExpr(getSCEV(L->getOperand(0)), IntegerType::get(Amt)), diff --git a/test/Analysis/ScalarEvolution/sext-inreg.ll b/test/Analysis/ScalarEvolution/sext-inreg.ll new file mode 100644 index 0000000000..c482fe6cf5 --- /dev/null +++ b/test/Analysis/ScalarEvolution/sext-inreg.ll @@ -0,0 +1,29 @@ +; RUN: llvm-as < %s | opt -analyze -scalar-evolution -disable-output \ +; RUN: | grep {signextend \{0,+,199\}<bb> to i64} | count 2 + +target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" +target triple = "i386-apple-darwin9.6" + +define i64 @foo(i64* nocapture %x, i64 %n) nounwind { +entry: + %t0 = icmp sgt i64 %n, 0 ; <i1> [#uses=1] + br i1 %t0, label %bb, label %return + +bb: ; preds = %bb, %entry + %i.01 = phi i64 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=2] + %t1 = shl i64 %i.01, 7 ; <i32> [#uses=1] + %t2 = ashr i64 %t1, 7 ; <i32> [#uses=1] + %s1 = shl i64 %i.01, 5 ; <i32> [#uses=1] + %s2 = ashr i64 %s1, 5 ; <i32> [#uses=1] + %t3 = getelementptr i64* %x, i64 %i.01 ; <i64*> [#uses=1] + store i64 0, i64* %t3, align 1 + %indvar.next = add i64 %i.01, 199 ; <i32> [#uses=2] + %exitcond = icmp eq i64 %indvar.next, %n ; <i1> [#uses=1] + br i1 %exitcond, label %return, label %bb + +return: ; preds = %bb, %entry + %p = phi i64 [ 0, %entry ], [ %t2, %bb ] + %q = phi i64 [ 0, %entry ], [ %s2, %bb ] + %v = xor i64 %p, %q + ret i64 %v +} |