e240e6b8b7
When we check for similarity, right now there is no order to how it is checked, except for via the suffix tree ordering. We can reduce how much structural analysis we perform by checking the the regions in decreasing size. In doing so, we know that if two large sections match, each of their contained regions also match. This allows us to skip the structural checking for each smaller section. IT does require that we use the large regions as a "bridge" to create the canonical mapping between the two regions. This reduces compile time significantly for some benchmarks. It will not perform as well for programs with many small items. Recommit fixes the IRSimilarity tests. Recommit of:805ec19d7dRecommit fixes llvm-sim tests Recommit of:082ec26758Reviewer: paquette Differential Revision: https://reviews.llvm.org/D139338
49 lines
1.9 KiB
LLVM
49 lines
1.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -disable-output -S -passes=print-ir-similarity < %s 2>&1 | FileCheck --allow-empty %s
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; Check to make sure that the IRSimilarityIdentifier and IRSimilarityPrinterPass
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; return items only within the same function when there are different sets of
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; instructions in functions.
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; CHECK: 2 candidates of length 5. Found in:
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; CHECK-NEXT: Function: fish, Basic Block: entry
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; CHECK-NEXT: Start Instruction: store i32 6, ptr %0, align 4
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; CHECK-NEXT: End Instruction: store i32 4, ptr %4, align 4
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; CHECK-NEXT: Function: fish, Basic Block: entry
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; CHECK-NEXT: Start Instruction: store i32 1, ptr %1, align 4
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; CHECK-NEXT: End Instruction: store i32 5, ptr %5, align 4
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; CHECK-NEXT: 2 candidates of length 3. Found in:
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; CHECK-NEXT: Function: turtle, Basic Block: (unnamed)
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; CHECK-NEXT: Start Instruction: %b = load i32, ptr %1, align 4
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; CHECK-NEXT: End Instruction: %d = load i32, ptr %3, align 4
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; CHECK-NEXT: Function: turtle, Basic Block: (unnamed)
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; CHECK-NEXT: Start Instruction: %a = load i32, ptr %0, align 4
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; CHECK-NEXT: End Instruction: %c = load i32, ptr %2, align 4
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define linkonce_odr void @fish() {
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entry:
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%0 = alloca i32, align 4
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%1 = alloca i32, align 4
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%2 = alloca i32, align 4
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%3 = alloca i32, align 4
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%4 = alloca i32, align 4
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%5 = alloca i32, align 4
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store i32 6, ptr %0, align 4
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store i32 1, ptr %1, align 4
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store i32 2, ptr %2, align 4
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store i32 3, ptr %3, align 4
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store i32 4, ptr %4, align 4
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store i32 5, ptr %5, align 4
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ret void
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}
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define void @turtle(ptr %0, ptr %1, ptr %2, ptr %3) {
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%a = load i32, ptr %0
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%b = load i32, ptr %1
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%c = load i32, ptr %2
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%d = load i32, ptr %3
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ret void
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}
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;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
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; CHECK: {{.*}}
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