derek.holloway
7502bf64a4
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114 lines
4.2 KiB
LLVM
114 lines
4.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 6
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; RUN: opt < %s -disable-output "-passes=print<da>" 2>&1 \
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; RUN: | FileCheck %s --check-prefixes=CHECK,CHECK-ALL
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; RUN: opt < %s -disable-output "-passes=print<da>" -da-enable-dependence-test=exact-siv 2>&1 \
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; RUN: | FileCheck %s --check-prefixes=CHECK,CHECK-EXACT-SIV
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; max_i = INT64_MAX/6 // 1537228672809129301
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; for (i = 0; i <= max_i; i++) {
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; A[-6*i + INT64_MAX] = 0;
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; if (i)
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; A[3*i - 2] = 1;
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; }
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;
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; There is a bidirectional dependency between `A[-6*i + INT64_MAX]`
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; and `A[3*i - 2]`, for example,
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;
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; memory access | i = 1 | i = 768614336404564651 | i = max_i
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; -------------------------|-------|------------------------|----------------
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; A[-6*i + INT64_MAX] | | A[3*max_i - 2] | A[1]
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; A[3*i - 2] | A[1] | | A[3*max_i - 2]
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;
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define void @exactsiv_const_ovfl(ptr %A) {
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; CHECK-LABEL: 'exactsiv_const_ovfl'
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; CHECK-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 0, ptr %idx.0, align 1
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; CHECK-NEXT: da analyze - none!
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; CHECK-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 1, ptr %idx.1, align 1
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; CHECK-NEXT: da analyze - output [*|<]!
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; CHECK-NEXT: Src: store i8 1, ptr %idx.1, align 1 --> Dst: store i8 1, ptr %idx.1, align 1
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; CHECK-NEXT: da analyze - none!
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;
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entry:
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br label %loop.header
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loop.header:
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%i = phi i64 [ 0, %entry ], [ %i.inc, %loop.latch ]
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%subscript.0 = phi i64 [ 9223372036854775807, %entry ], [ %subscript.0.next, %loop.latch ]
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%subscript.1 = phi i64 [ -2, %entry ], [ %subscript.1.next, %loop.latch ]
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%idx.0 = getelementptr inbounds i8, ptr %A, i64 %subscript.0
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store i8 0, ptr %idx.0
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%cond.store = icmp ne i64 %i, 0
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br i1 %cond.store, label %if.store, label %loop.latch
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if.store:
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%idx.1 = getelementptr inbounds i8, ptr %A, i64 %subscript.1
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store i8 1, ptr %idx.1
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br label %loop.latch
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loop.latch:
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%i.inc = add nuw nsw i64 %i, 1
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%subscript.0.next = add nsw i64 %subscript.0, -6
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%subscript.1.next = add nsw i64 %subscript.1, 3
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%exitcond = icmp sgt i64 %i.inc, 1537228672809129301
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br i1 %exitcond, label %exit, label %loop.header
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exit:
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ret void
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}
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; A generalized version of the above case.
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;
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; for (long long i = 0; i <= n / 6; i++) {
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; A[-6*i + n] = 0;
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; if (i)
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; A[3*i - 2] = 1;
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; }
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define void @exactsiv_param_ovfl(ptr %A, i64 %n) {
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; CHECK-ALL-LABEL: 'exactsiv_param_ovfl'
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; CHECK-ALL-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 0, ptr %idx.0, align 1
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; CHECK-ALL-NEXT: da analyze - none!
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; CHECK-ALL-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 1, ptr %idx.1, align 1
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; CHECK-ALL-NEXT: da analyze - output [*|<]!
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; CHECK-ALL-NEXT: Src: store i8 1, ptr %idx.1, align 1 --> Dst: store i8 1, ptr %idx.1, align 1
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; CHECK-ALL-NEXT: da analyze - none!
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;
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; CHECK-EXACT-SIV-LABEL: 'exactsiv_param_ovfl'
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; CHECK-EXACT-SIV-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 0, ptr %idx.0, align 1
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; CHECK-EXACT-SIV-NEXT: da analyze - output [*]!
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; CHECK-EXACT-SIV-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 1, ptr %idx.1, align 1
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; CHECK-EXACT-SIV-NEXT: da analyze - output [*|<]!
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; CHECK-EXACT-SIV-NEXT: Src: store i8 1, ptr %idx.1, align 1 --> Dst: store i8 1, ptr %idx.1, align 1
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; CHECK-EXACT-SIV-NEXT: da analyze - output [*]!
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;
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entry:
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%bound = sdiv i64 %n, 6
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%guard = icmp sgt i64 %n, 0
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br i1 %guard, label %loop.header, label %exit
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loop.header:
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%i = phi i64 [ 0, %entry ], [ %i.inc, %loop.latch ]
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%subscript.0 = phi i64 [ %n, %entry ], [ %subscript.0.next, %loop.latch ]
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%subscript.1 = phi i64 [ -2, %entry ], [ %subscript.1.next, %loop.latch ]
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%idx.0 = getelementptr inbounds i8, ptr %A, i64 %subscript.0
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store i8 0, ptr %idx.0
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%cond.store = icmp ne i64 %i, 0
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br i1 %cond.store, label %if.store, label %loop.latch
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if.store:
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%idx.1 = getelementptr inbounds i8, ptr %A, i64 %subscript.1
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store i8 1, ptr %idx.1
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br label %loop.latch
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loop.latch:
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%i.inc = add nuw nsw i64 %i, 1
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%subscript.0.next = add nsw i64 %subscript.0, -6
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%subscript.1.next = add nsw i64 %subscript.1, 3
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%exitcond = icmp sgt i64 %i.inc, %bound
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br i1 %exitcond, label %exit, label %loop.header
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exit:
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ret void
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}
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