2c6b239cc6
This patch corrects the behavior of the Dependence Analysis for memory accesses that do not start at the same offset or do not have similar strides. When offsets or strides cannot be disambiguated at compile time, DA collects a set of runtime assumptions under which the dependence test becomes valid. The default remains the same as before the patch: DA rejects the dependence test as undecidable instead of collecting runtime assumptions. --------- Co-authored-by: Michael Kruse <github@meinersbur.de> Co-authored-by: Ryotaro Kasuga <kasuga.ryotaro@fujitsu.com>
93 lines
5.2 KiB
LLVM
93 lines
5.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 5
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; RUN: opt < %s -disable-output -passes="print<da>" 2>&1 | FileCheck %s
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; Test that the dependence analysis pass does seg-fault due to a null pointer
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; dereference. The code in gcdMIVTest requires a null check for the result of
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; getConstantPart.
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target datalayout = "e-m:e-p:32:32-i1:32-i64:64-a:0-v32:32-n16:32"
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%0 = type { i32 }
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%1 = type { [2 x [512 x %0]], [512 x %0], %2, [144 x i8], %9, %10, %11, %12, %17, [12 x i8], %18, %19, %21, [128 x i8] }
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%2 = type { [64 x i16], [64 x i16], [64 x %0], [64 x %0], [128 x %0], [128 x %0], [256 x %0], [256 x %0], [32 x %0], [32 x %0], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], %3, %4, %5, [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], %6, %7, [32 x i32], [32 x i32], [32 x i32], [64 x i16], %8, [8 x i64], [4 x i64], [2 x i64], [256 x i8], [256 x i32], [64 x i16], [64 x i16] }
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%3 = type { [64 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [64 x i32], [64 x i32], [64 x i32], [64 x i32], [64 x i32], [64 x i32], [64 x i32], [64 x i32], [64 x i32], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [32 x %0], [32 x %0], [128 x i8] }
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%4 = type { [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16] }
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%5 = type { [128 x i8], [256 x i8], [256 x i8] }
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%6 = type { [64 x i32], [128 x i16], [64 x i16], [64 x i16], [64 x i16] }
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%7 = type { [192 x %0], [192 x %0], [384 x %0], [1984 x %0] }
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%8 = type { [128 x i8], [128 x i8], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16], [64 x i16] }
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%9 = type { [32 x %0], [32 x %0], [64 x i32], [64 x i32], [64 x i32], [64 x i32] }
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%10 = type { [1536 x %0], [2048 x %0], [512 x i32], [256 x i32], [32 x %0], [64 x i32], [128 x i8], [512 x i32], [1024 x %0] }
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%11 = type { [512 x i32], [512 x i32], [1024 x %0], [512 x i32], [512 x %0] }
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%12 = type { %13, [2048 x %0], [2048 x %0], [256 x i32], [1024 x i32], %14, [512 x %0], [256 x i32], %15, [4 x [256 x %0]], [4 x [256 x %0]], [256 x i32], [8 x [32 x i32]], [8 x [32 x %0]], [384 x %0], [256 x i32], %16 }
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%13 = type { [2048 x %0] }
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%14 = type { [1024 x %0], [1024 x %0] }
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%15 = type { [256 x %0], [256 x %0] }
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%16 = type { [128 x %0], [128 x %0] }
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%17 = type { [32 x %0], [32 x i32], [32 x i32], [32 x i32], [32 x i32], [2 x [8 x [32 x %0]]], [512 x %0], [512 x %0], [58 x i16] }
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%18 = type { [512 x i8] }
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%19 = type { [2048 x %0], [2560 x i16], %20, [512 x i32], [256 x i32], [512 x i8] }
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%20 = type { [768 x i32] }
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%21 = type { [416 x i32] }
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define void @test(ptr %A, ptr %B, i1 %arg, i32 %n, i32 %m) #0 align 2 {
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; CHECK-LABEL: 'test'
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; CHECK-NEXT: Src: %v1 = load i32, ptr %B, align 4 --> Dst: %v1 = load i32, ptr %B, align 4
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; CHECK-NEXT: da analyze - none!
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; CHECK-NEXT: Src: %v1 = load i32, ptr %B, align 4 --> Dst: %v27 = load <32 x i32>, ptr %v25, align 256
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; CHECK-NEXT: da analyze - confused!
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; CHECK-NEXT: Src: %v1 = load i32, ptr %B, align 4 --> Dst: %v32 = load <32 x i32>, ptr %v30, align 128
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; CHECK-NEXT: da analyze - confused!
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; CHECK-NEXT: Src: %v27 = load <32 x i32>, ptr %v25, align 256 --> Dst: %v27 = load <32 x i32>, ptr %v25, align 256
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; CHECK-NEXT: da analyze - consistent input [0 S S]!
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; CHECK-NEXT: Src: %v27 = load <32 x i32>, ptr %v25, align 256 --> Dst: %v32 = load <32 x i32>, ptr %v30, align 128
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; CHECK-NEXT: da analyze - input [* S S|<]!
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; CHECK-NEXT: Runtime Assumptions:
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; CHECK-NEXT: Equal predicate: (zext i7 (4 * (trunc i32 %v1 to i7) * (1 + (trunc i32 %n to i7))) to i32) == 0
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; CHECK-NEXT: Equal predicate: (8 * (zext i4 (trunc i32 %v1 to i4) to i32))<nuw><nsw> == 0
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; CHECK-NEXT: Src: %v32 = load <32 x i32>, ptr %v30, align 128 --> Dst: %v32 = load <32 x i32>, ptr %v30, align 128
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; CHECK-NEXT: da analyze - consistent input [0 S S]!
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; CHECK-NEXT: Runtime Assumptions:
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; CHECK-NEXT: Equal predicate: (zext i7 (4 * (trunc i32 %v1 to i7) * (1 + (trunc i32 %n to i7))) to i32) == 0
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; CHECK-NEXT: Equal predicate: (8 * (zext i4 (trunc i32 %v1 to i4) to i32))<nuw><nsw> == 0
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;
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entry:
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%v1 = load i32, ptr %B, align 4
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br label %bb13
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bb13:
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%v2 = phi i32 [ 0, %entry ], [ %v39, %bb38 ]
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br i1 %arg, label %bb15, label %bb38
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bb15:
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%v3 = mul nsw i32 %v2, 2
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br label %bb17
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bb17:
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br i1 %arg, label %bb21, label %bb37
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bb21:
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%v22 = add nsw i32 %n, 1
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%v23 = add i32 %v22, %v3
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%v24 = mul nsw i32 %v23, %v1
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%v25 = getelementptr inbounds %1, ptr %A, i32 0, i32 7, i32 1, i32 %v24
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%v27 = load <32 x i32>, ptr %v25, align 256
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%v28 = add i32 %m, %v3
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%v29 = mul nsw i32 %v28, 32
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%v30 = getelementptr inbounds %1, ptr %A, i32 0, i32 7, i32 14, i32 %v29
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%v32 = load <32 x i32>, ptr %v30, align 128
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br i1 %arg, label %bb21, label %bb37
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bb37:
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br i1 %arg, label %bb17, label %bb38
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bb38:
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%v39 = add nsw i32 %v2, 1
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br label %bb13
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bb40:
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ret void
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}
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attributes #0 = { "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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