diff options
| -rw-r--r-- | llvm/lib/Analysis/DependenceAnalysis.cpp | 11 | ||||
| -rw-r--r-- | llvm/test/Analysis/DependenceAnalysis/same-sd-for-diff-becount-type-loops.ll | 68 |
2 files changed, 76 insertions, 3 deletions
diff --git a/llvm/lib/Analysis/DependenceAnalysis.cpp b/llvm/lib/Analysis/DependenceAnalysis.cpp index a572eef..84ee8c0 100644 --- a/llvm/lib/Analysis/DependenceAnalysis.cpp +++ b/llvm/lib/Analysis/DependenceAnalysis.cpp @@ -1131,9 +1131,14 @@ bool DependenceInfo::haveSameSD(const Loop *SrcLoop, if (SE->hasLoopInvariantBackedgeTakenCount(DstLoop)) DstUP = SE->getBackedgeTakenCount(DstLoop); - if (SrcUB != nullptr && DstUP != nullptr && - SE->isKnownPredicate(ICmpInst::ICMP_EQ, SrcUB, DstUP)) - return true; + if (SrcUB != nullptr && DstUP != nullptr) { + Type *WiderType = SE->getWiderType(SrcUB->getType(), DstUP->getType()); + SrcUB = SE->getNoopOrZeroExtend(SrcUB, WiderType); + DstUP = SE->getNoopOrZeroExtend(DstUP, WiderType); + + if (SE->isKnownPredicate(ICmpInst::ICMP_EQ, SrcUB, DstUP)) + return true; + } return false; } diff --git a/llvm/test/Analysis/DependenceAnalysis/same-sd-for-diff-becount-type-loops.ll b/llvm/test/Analysis/DependenceAnalysis/same-sd-for-diff-becount-type-loops.ll new file mode 100644 index 0000000..66880b5 --- /dev/null +++ b/llvm/test/Analysis/DependenceAnalysis/same-sd-for-diff-becount-type-loops.ll @@ -0,0 +1,68 @@ +; RUN: opt < %s -disable-output "-passes=print<da>" -aa-pipeline=basic-aa 2>&1 | FileCheck %s + +define void @f1() { +; CHECK-LABEL: 'f1' +; CHECK-NEXT: Src: store i32 0, ptr null, align 4 --> Dst: store i32 0, ptr null, align 4 +; CHECK-NEXT: da analyze - consistent output [S]! +; CHECK-NEXT: Src: store i32 0, ptr null, align 4 --> Dst: %2 = load i32, ptr null, align 4 +; CHECK-NEXT: da analyze - consistent flow [|<]! +; CHECK-NEXT: Src: %2 = load i32, ptr null, align 4 --> Dst: %2 = load i32, ptr null, align 4 +; CHECK-NEXT: da analyze - consistent input [S]! +; +entry: + br label %for.1.header + +for.1.header: ; preds = %for.2.end, %entry + br label %for.1.body + +for.1.body: ; preds = %for.1.body, %whiledo + %0 = phi i32 [ 0, %for.1.header ], [ 1, %for.1.body ] + store i32 0, ptr null, align 4 + %1 = icmp ult i32 %0, 1 + br i1 %1, label %for.1.body, label %for.1.end + +for.1.end: ; preds = %for.1.body + br label %for.2.body + +for.2.body: ; preds = %for.2.body, %for.1.end + %2 = load i32, ptr null, align 4 + br i1 false, label %for.2.body, label %exit + +exit: ; preds = %for.2.body + ret void +} + +define void @f2() { +; CHECK-LABEL: 'f2' +; CHECK-NEXT: Src: store i32 0, ptr null, align 4 --> Dst: store i32 0, ptr null, align 4 +; CHECK-NEXT: da analyze - consistent output [S]! +; CHECK-NEXT: Src: store i32 0, ptr null, align 4 --> Dst: %3 = load i32, ptr null, align 4 +; CHECK-NEXT: da analyze - flow [|<] / assuming 1 loop level(s) fused: [S|<]! +; CHECK-NEXT: Src: %3 = load i32, ptr null, align 4 --> Dst: %3 = load i32, ptr null, align 4 +; CHECK-NEXT: da analyze - consistent input [S]! +; +entry: + br label %for.1.header + +for.1.header: ; preds = %for.2.end, %entry + br label %for.1.body + +for.1.body: ; preds = %for.1.body, %whiledo + %0 = phi i32 [ 0, %for.1.header ], [ 1, %for.1.body ] + store i32 0, ptr null, align 4 + %1 = icmp ult i32 %0, 1 + br i1 %1, label %for.1.body, label %for.1.end + +for.1.end: ; preds = %for.1.body + br label %for.2.body + +for.2.body: ; preds = %for.2.body, %for.1.end + %2 = phi i64 [ 0, %for.1.end ], [ %4, %for.2.body ] + %3 = load i32, ptr null, align 4 + %4 = add nuw nsw i64 %2, 1 + %5 = icmp ult i64 %4, 2 + br i1 %5, label %for.2.body, label %exit + +exit: ; preds = %for.2.body + ret void +} |