derek.holloway
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109 lines
3.5 KiB
LLVM
109 lines
3.5 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=weak-zero-siv 2>&1 \
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; RUN: | FileCheck %s --check-prefixes=CHECK,CHECK-WEAK-ZERO-SIV
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;
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; coeff = (1 << 62) - 1;
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; // Use `i*i <u n` to make the BTC unpredictable.
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; for (i = 0; i*i <u n; i++) {
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; A[-4] = 0;
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; if (i == 4)
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; A[coeff*i] = 1;
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; }
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;
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; When `n` is large enough, there exists a dependency with all directions between the two stores.
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;
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; memory access | i == 0 | i == 4 | i == 5
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; ---------------|--------|--------|--------
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; A[-4] | A[-4] | A[-4] | A[-4]
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; A[(2^62-1)*i] | | A[-4] |
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;
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define void @weak_zero_src_siv_addrec_wrap(ptr %A, i64 %n) {
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; CHECK-LABEL: 'weak_zero_src_siv_addrec_wrap'
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; CHECK-NEXT: Src: store i8 0, ptr %gep.0, align 1 --> Dst: store i8 0, ptr %gep.0, align 1
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; CHECK-NEXT: da analyze - output [S]!
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; CHECK-NEXT: Src: store i8 0, ptr %gep.0, align 1 --> Dst: store i8 1, ptr %gep.1, align 1
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; CHECK-NEXT: da analyze - output [*|<]!
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; CHECK-NEXT: Src: store i8 1, ptr %gep.1, align 1 --> Dst: store i8 1, ptr %gep.1, align 1
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; CHECK-NEXT: da analyze - output [*]!
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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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%gep.0 = getelementptr i8, ptr %A, i64 -4
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store i8 0, ptr %gep.0
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%cond = icmp eq i64 %i, 4
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br i1 %cond, label %if.then, label %loop.latch
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if.then:
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%offset = mul i64 4611686018427387903, %i
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%gep.1 = getelementptr i8, ptr %A, i64 %offset
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store i8 1, ptr %gep.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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%sq = mul nuw nsw i64 %i.inc, %i.inc
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%ec = icmp uge i64 %sq, %n
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br i1 %ec, label %exit, label %loop.header
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exit:
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ret void
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}
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; coeff = (1 << 62) - 1;
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; // Use `i*i <u n` to make the BTC unpredictable.
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; for (i = 0; i*i <u n; i++) {
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; if (i == 4)
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; A[coeff*i] = 0;
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; A[-4] = 1;
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; }
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;
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; When `n` is large enough, there exists a dependency with all directions between the two stores.
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;
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; memory access | i == 0 | i == 4 | i == 5
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; ---------------|--------|--------|--------
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; A[(2^62-1)*i] | | A[-4] |
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; A[-4] | A[-4] | A[-4] | A[-4]
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;
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define void @weak_zero_dst_siv_addrec_wrap(ptr %A, i64 %n) {
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; CHECK-LABEL: 'weak_zero_dst_siv_addrec_wrap'
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; CHECK-NEXT: Src: store i8 0, ptr %gep.0, align 1 --> Dst: store i8 0, ptr %gep.0, align 1
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; CHECK-NEXT: da analyze - output [*]!
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; CHECK-NEXT: Src: store i8 0, ptr %gep.0, align 1 --> Dst: store i8 1, ptr %gep.1, align 1
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; CHECK-NEXT: da analyze - output [*|<]!
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; CHECK-NEXT: Src: store i8 1, ptr %gep.1, align 1 --> Dst: store i8 1, ptr %gep.1, align 1
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; CHECK-NEXT: da analyze - output [S]!
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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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%cond = icmp eq i64 %i, 4
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br i1 %cond, label %if.then, label %loop.latch
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if.then:
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%offset = mul i64 4611686018427387903, %i
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%gep.0 = getelementptr i8, ptr %A, i64 %offset
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store i8 0, ptr %gep.0
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br label %loop.latch
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loop.latch:
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%gep.1 = getelementptr i8, ptr %A, i64 -4
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store i8 1, ptr %gep.1
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%i.inc = add nuw nsw i64 %i, 1
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%sq = mul nuw nsw i64 %i.inc, %i.inc
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%ec = icmp uge i64 %sq, %n
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br i1 %ec, label %exit, label %loop.header
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exit:
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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-ALL: {{.*}}
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; CHECK-WEAK-ZERO-SIV: {{.*}}
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