diff options
| -rw-r--r-- | lib/Analysis/ScalarEvolution.cpp | 2 | ||||
| -rw-r--r-- | test/Analysis/ScalarEvolution/zext-signed-addrec.ll | 81 |
2 files changed, 82 insertions, 1 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index 0a02f4e9d7..d9b696e079 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/lib/Analysis/ScalarEvolution.cpp @@ -6218,7 +6218,7 @@ bool ScalarEvolution::isImpliedCond(ICmpInst::Predicate Pred, // LHS' type is checked for above. if (getTypeSizeInBits(LHS->getType()) > getTypeSizeInBits(FoundLHS->getType())) { - if (CmpInst::isSigned(Pred)) { + if (CmpInst::isSigned(FoundPred)) { FoundLHS = getSignExtendExpr(FoundLHS, LHS->getType()); FoundRHS = getSignExtendExpr(FoundRHS, LHS->getType()); } else { diff --git a/test/Analysis/ScalarEvolution/zext-signed-addrec.ll b/test/Analysis/ScalarEvolution/zext-signed-addrec.ll new file mode 100644 index 0000000000..27aed3b0da --- /dev/null +++ b/test/Analysis/ScalarEvolution/zext-signed-addrec.ll @@ -0,0 +1,81 @@ +; RUN: opt -loop-reduce -S < %s | FileCheck %s +; PR18000 + +target datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128" +target triple = "x86_64-unknown-linux-gnu" + +@a = global i32 0, align 4 +@b = common global i32 0, align 4 +@e = common global i8 0, align 1 +@d = common global i32 0, align 4 +@c = common global i32 0, align 4 +@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1 + +; Function Attrs: nounwind optsize uwtable +; CHECK-LABEL: foo +define i32 @foo() { +entry: + %.pr = load i32* @b, align 4 + %cmp10 = icmp slt i32 %.pr, 1 + br i1 %cmp10, label %for.cond1.preheader.lr.ph, label %entry.for.end9_crit_edge + +entry.for.end9_crit_edge: ; preds = %entry + %.pre = load i32* @c, align 4 + br label %for.end9 + +for.cond1.preheader.lr.ph: ; preds = %entry + %0 = load i32* @a, align 4 + %tobool = icmp eq i32 %0, 0 + br i1 %tobool, label %for.cond1.preheader.for.cond1.preheader.split_crit_edge, label %return.loopexit.split + +for.cond1.preheader.for.cond1.preheader.split_crit_edge: ; preds = %for.cond1.preheader.lr.ph, %for.inc8 + %1 = phi i32 [ %inc, %for.inc8 ], [ %.pr, %for.cond1.preheader.lr.ph ] + br label %if.end + +; CHECK-LABEL: if.end +if.end: ; preds = %if.end, %for.cond1.preheader.for.cond1.preheader.split_crit_edge + +; CHECK: %lsr.iv = phi i32 [ %lsr.iv.next, %if.end ], [ 258, %for.cond1.preheader.for.cond1.preheader.split_crit_edge ] + %indvars.iv = phi i32 [ 1, %for.cond1.preheader.for.cond1.preheader.split_crit_edge ], [ %indvars.iv.next, %if.end ] + + %2 = phi i8 [ 1, %for.cond1.preheader.for.cond1.preheader.split_crit_edge ], [ %dec, %if.end ] + %conv7 = mul i32 %indvars.iv, 258 + %shl = and i32 %conv7, 510 + store i32 %shl, i32* @c, align 4 + +; CHECK: %lsr.iv.next = add i32 %lsr.iv, -258 + %dec = add i8 %2, -1 + + %cmp2 = icmp sgt i8 %dec, -1 + %indvars.iv.next = add i32 %indvars.iv, -1 + br i1 %cmp2, label %if.end, label %for.inc8 + +for.inc8: ; preds = %if.end + store i32 0, i32* @d, align 4 + %inc = add nsw i32 %1, 1 + store i32 %inc, i32* @b, align 4 + %cmp = icmp slt i32 %1, 0 + br i1 %cmp, label %for.cond1.preheader.for.cond1.preheader.split_crit_edge, label %for.cond.for.end9_crit_edge + +for.cond.for.end9_crit_edge: ; preds = %for.inc8 + store i8 %dec, i8* @e, align 1 + br label %for.end9 + +for.end9: ; preds = %entry.for.end9_crit_edge, %for.cond.for.end9_crit_edge + %3 = phi i32 [ %.pre, %entry.for.end9_crit_edge ], [ %shl, %for.cond.for.end9_crit_edge ] + %call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i64 0, i64 0), i32 %3) #2 + br label %return + +return.loopexit.split: ; preds = %for.cond1.preheader.lr.ph + store i8 1, i8* @e, align 1 + store i32 0, i32* @d, align 4 + br label %return + +return: ; preds = %return.loopexit.split, %for.end9 + %retval.0 = phi i32 [ 0, %for.end9 ], [ 1, %return.loopexit.split ] + ret i32 %retval.0 +} + +; Function Attrs: nounwind optsize +declare i32 @printf(i8* nocapture readonly, ...) + |