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[DA] Add tests where dependencies are missed due to overflow (NFC) #164246
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 6 | ||
| ; RUN: opt < %s -disable-output "-passes=print<da>" 2>&1 | FileCheck %s | ||
| ; RUN: opt < %s -disable-output "-passes=print<da>" -da-enable-dependence-test=gcd-miv 2>&1 \ | ||
| ; RUN: | FileCheck %s --check-prefix=CHECK-GCD-MIV | ||
|
|
||
| ; offset0 = 4; | ||
| ; offset1 = 0; | ||
| ; for (i = 0; i < 100; i++) { | ||
| ; A[offset0] = 1; | ||
| ; A[offset1] = 2; | ||
| ; offset0 += 3*m; | ||
| ; offset1 += 3; | ||
| ; } | ||
| ; | ||
| ; FIXME: DependenceAnalysis currently detects no dependency between the two | ||
| ; stores, but it does exist. E.g., consider `m` is 12297829382473034411, which | ||
| ; is a modular multiplicative inverse of 3 under modulo 2^64. Then `offset0` is | ||
| ; effectively `i + 4`, so accesses will be as follows: | ||
| ; | ||
| ; - A[offset0] : A[4], A[5], A[6], ... | ||
| ; - A[offset1] : A[0], A[3], A[6], ... | ||
| ; | ||
| ; The root cause is that DA assumes `3*m` begin a multiple of 3 in mathematical | ||
| ; sense, which isn't necessarily true due to overflow. | ||
| ; | ||
| define void @gcdmiv_coef_ovfl(ptr %A, i64 %m) { | ||
| ; CHECK-LABEL: 'gcdmiv_coef_ovfl' | ||
| ; CHECK-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 1, ptr %gep.0, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 2, ptr %gep.1, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; | ||
| ; CHECK-GCD-MIV-LABEL: 'gcdmiv_coef_ovfl' | ||
| ; CHECK-GCD-MIV-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 1, ptr %gep.0, align 1 | ||
| ; CHECK-GCD-MIV-NEXT: da analyze - consistent output [*]! | ||
| ; CHECK-GCD-MIV-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-GCD-MIV-NEXT: da analyze - none! | ||
| ; CHECK-GCD-MIV-NEXT: Src: store i8 2, ptr %gep.1, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-GCD-MIV-NEXT: da analyze - consistent output [*]! | ||
| ; | ||
| entry: | ||
| %step = mul i64 3, %m | ||
| br label %loop | ||
|
|
||
| loop: | ||
| %i = phi i64 [ 0, %entry ], [ %i.inc, %loop ] | ||
| %offset.0 = phi i64 [ 4, %entry ] , [ %offset.0.next, %loop ] | ||
| %offset.1 = phi i64 [ 0, %entry ] , [ %offset.1.next, %loop ] | ||
| %gep.0 = getelementptr inbounds i8, ptr %A, i64 %offset.0 | ||
| %gep.1 = getelementptr inbounds i8, ptr %A, i64 %offset.1 | ||
| store i8 1, ptr %gep.0 | ||
| store i8 2, ptr %gep.1 | ||
| %i.inc = add nuw nsw i64 %i, 1 | ||
| %offset.0.next = add nsw i64 %offset.0, %step | ||
| %offset.1.next = add nsw i64 %offset.1, 3 | ||
| %ec = icmp eq i64 %i.inc, 100 | ||
| br i1 %ec, label %exit, label %loop | ||
|
|
||
| exit: | ||
| ret void | ||
| } | ||
72 changes: 72 additions & 0 deletions
72
llvm/test/Analysis/DependenceAnalysis/strong-siv-overflow.ll
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 6 | ||
| ; RUN: opt < %s -disable-output "-passes=print<da>" 2>&1 | FileCheck %s | ||
| ; RUN: opt < %s -disable-output "-passes=print<da>" -da-enable-dependence-test=strong-siv 2>&1 \ | ||
| ; RUN: | FileCheck %s --check-prefix=CHECK-STRONG-SIV | ||
|
|
||
| ; offset0 = -2; | ||
| ; offset1 = -4; | ||
| ; for (i = 0; i < (1LL << 62); i++, offset0 += 2, offset1 += 2) { | ||
| ; if (0 <= offset0) | ||
| ; A[offset0] = 1; | ||
| ; if (0 <= offset1) | ||
| ; A[offset1] = 2; | ||
| ; } | ||
| ; | ||
| ; FIXME: DependenceAnalysis currently detects no dependency between the two | ||
| ; stores, but it does exist. | ||
| ; The root cause is that the product of the BTC and the coefficient triggers an | ||
| ; overflow. | ||
| define void @strongsiv_const_ovfl(ptr %A) { | ||
| ; CHECK-LABEL: 'strongsiv_const_ovfl' | ||
| ; CHECK-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 1, ptr %gep.0, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 2, ptr %gep.1, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; | ||
| ; CHECK-STRONG-SIV-LABEL: 'strongsiv_const_ovfl' | ||
| ; CHECK-STRONG-SIV-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 1, ptr %gep.0, align 1 | ||
| ; CHECK-STRONG-SIV-NEXT: da analyze - none! | ||
| ; CHECK-STRONG-SIV-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-STRONG-SIV-NEXT: da analyze - none! | ||
| ; CHECK-STRONG-SIV-NEXT: Src: store i8 2, ptr %gep.1, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-STRONG-SIV-NEXT: da analyze - none! | ||
| ; | ||
| entry: | ||
| br label %loop.header | ||
|
|
||
| loop.header: | ||
| %i = phi i64 [ 0, %entry ], [ %i.inc, %loop.latch ] | ||
| %offset.0 = phi i64 [ -2, %entry ], [ %offset.0.next, %loop.latch ] | ||
| %offset.1 = phi i64 [ -4, %entry ], [ %offset.1.next, %loop.latch ] | ||
| %ec = icmp eq i64 %i, 4611686018427387904 | ||
| br i1 %ec, label %exit, label %loop.body | ||
|
|
||
| loop.body: | ||
| %cond.0 = icmp sge i64 %offset.0, 0 | ||
| %cond.1 = icmp sge i64 %offset.1, 0 | ||
| br i1 %cond.0, label %if.then.0, label %loop.middle | ||
|
|
||
| if.then.0: | ||
| %gep.0 = getelementptr inbounds i8, ptr %A, i64 %offset.0 | ||
| store i8 1, ptr %gep.0 | ||
| br label %loop.middle | ||
|
|
||
| loop.middle: | ||
| br i1 %cond.1, label %if.then.1, label %loop.latch | ||
|
|
||
| if.then.1: | ||
| %gep.1 = getelementptr inbounds i8, ptr %A, i64 %offset.1 | ||
| store i8 2, ptr %gep.1 | ||
| br label %loop.latch | ||
|
|
||
| loop.latch: | ||
| %i.inc = add nuw nsw i64 %i, 1 | ||
| %offset.0.next = add nsw i64 %offset.0, 2 | ||
| %offset.1.next = add nsw i64 %offset.1, 2 | ||
| br label %loop.header | ||
|
|
||
| exit: | ||
| ret void | ||
| } |
128 changes: 128 additions & 0 deletions
128
llvm/test/Analysis/DependenceAnalysis/symbolic-rdiv-overflow.ll
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 6 | ||
| ; RUN: opt < %s -disable-output "-passes=print<da>" 2>&1 | FileCheck %s | ||
| ; RUN: opt < %s -disable-output "-passes=print<da>" -da-enable-dependence-test=symbolic-rdiv 2>&1 \ | ||
| ; RUN: | FileCheck %s --check-prefix=CHECK-SYMBOLIC-RDIV | ||
|
|
||
| ; offset = -2; | ||
| ; for (i = 0; i < (1LL << 62); i++, offset += 2) { | ||
| ; if (0 <= offset0) | ||
| ; A[offset0] = 1; | ||
| ; A[i] = 2; | ||
| ; } | ||
| ; | ||
| ; FIXME: DependenceAnalysis currently detects no dependency between the two | ||
| ; stores, but it does exist. | ||
| ; The root cause is that the product of the BTC and the coefficient triggers an | ||
| ; overflow. | ||
| define void @symbolicrdiv_prod_ovfl(ptr %A) { | ||
| ; CHECK-LABEL: 'symbolicrdiv_prod_ovfl' | ||
| ; CHECK-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 1, ptr %gep.0, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 2, ptr %gep.1, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; | ||
| ; CHECK-SYMBOLIC-RDIV-LABEL: 'symbolicrdiv_prod_ovfl' | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 1, ptr %gep.0, align 1 | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: da analyze - none! | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: da analyze - none! | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: Src: store i8 2, ptr %gep.1, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: da analyze - consistent output [*]! | ||
| ; | ||
| entry: | ||
| br label %loop.header | ||
|
|
||
| loop.header: | ||
| %i = phi i64 [ 0, %entry ], [ %i.inc, %loop.latch ] | ||
| %offset = phi i64 [ -2, %entry ], [ %offset.next, %loop.latch ] | ||
| %ec = icmp eq i64 %i, 4611686018427387904 | ||
| br i1 %ec, label %exit, label %loop.body | ||
|
|
||
| loop.body: | ||
| %cond = icmp sge i64 %offset, 0 | ||
| br i1 %cond, label %if.then, label %loop.latch | ||
|
|
||
| if.then: | ||
| %gep.0 = getelementptr inbounds i8, ptr %A, i64 %offset | ||
| store i8 1, ptr %gep.0 | ||
| br label %loop.latch | ||
|
|
||
| loop.latch: | ||
| %gep.1 = getelementptr inbounds i8, ptr %A, i64 %i | ||
| store i8 2, ptr %gep.1 | ||
| %i.inc = add nuw nsw i64 %i, 1 | ||
| %offset.next = add nsw i64 %offset, 2 | ||
| br label %loop.header | ||
|
|
||
| exit: | ||
| ret void | ||
| } | ||
|
|
||
| ; offset0 = -4611686018427387904 // -2^62 | ||
| ; offset1 = 4611686018427387904 // 2^62 | ||
| ; for (i = 0; i < (1LL << 62) - 100; i++) { | ||
| ; if (0 <= offset0) | ||
| ; A[offset0] = 1; | ||
| ; if (0 <= offset1) | ||
| ; A[offset1] = 2; | ||
| ; offset0 += 2; | ||
| ; offset1 -= 1; | ||
| ; } | ||
| ; | ||
| ; FIXME: DependenceAnalysis currently detects no dependency between the two | ||
| ; stores, but it does exist. | ||
| ; The root cause is that the calculation of the differenct between the two | ||
| ; constants (-2^62 and 2^62) triggers an overflow. | ||
| define void @symbolicrdiv_delta_ovfl(ptr %A) { | ||
| ; CHECK-LABEL: 'symbolicrdiv_delta_ovfl' | ||
| ; CHECK-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 1, ptr %gep.0, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 2, ptr %gep.1, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; | ||
| ; CHECK-SYMBOLIC-RDIV-LABEL: 'symbolicrdiv_delta_ovfl' | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 1, ptr %gep.0, align 1 | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: da analyze - consistent output [*]! | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: Src: store i8 1, ptr %gep.0, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: da analyze - none! | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: Src: store i8 2, ptr %gep.1, align 1 --> Dst: store i8 2, ptr %gep.1, align 1 | ||
| ; CHECK-SYMBOLIC-RDIV-NEXT: da analyze - consistent output [*]! | ||
| ; | ||
| entry: | ||
| br label %loop.header | ||
|
|
||
| loop.header: | ||
| %i = phi i64 [ 0, %entry ], [ %i.inc, %loop.latch ] | ||
| %offset.0 = phi i64 [ -4611686018427387904, %entry ], [ %offset.0.next, %loop.latch ] | ||
| %offset.1 = phi i64 [ 4611686018427387904, %entry ], [ %offset.1.next, %loop.latch ] | ||
| %cond.0 = icmp sge i64 %offset.0, 0 | ||
| %cond.1 = icmp sge i64 %offset.1, 0 | ||
| br i1 %cond.0, label %if.then.0, label %loop.middle | ||
|
|
||
| if.then.0: | ||
| %gep.0 = getelementptr inbounds i8, ptr %A, i64 %offset.0 | ||
| store i8 1, ptr %gep.0 | ||
| br label %loop.middle | ||
|
|
||
| loop.middle: | ||
| br i1 %cond.1, label %if.then.1, label %loop.latch | ||
|
|
||
| if.then.1: | ||
| %gep.1 = getelementptr inbounds i8, ptr %A, i64 %offset.1 | ||
| store i8 2, ptr %gep.1 | ||
| br label %loop.latch | ||
|
|
||
| loop.latch: | ||
| %i.inc = add nuw nsw i64 %i, 1 | ||
| %offset.0.next = add nsw i64 %offset.0, 2 | ||
| %offset.1.next = sub nsw i64 %offset.1, 1 | ||
| %ec = icmp eq i64 %i.inc, 4611686018427387804 ; 2^62 - 100 | ||
| br i1 %ec, label %exit, label %loop.header | ||
|
|
||
| exit: | ||
| ret void | ||
| } |
122 changes: 122 additions & 0 deletions
122
llvm/test/Analysis/DependenceAnalysis/weak-crossing-siv-overflow.ll
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| ; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 6 | ||
| ; RUN: opt < %s -disable-output "-passes=print<da>" 2>&1 | FileCheck %s | ||
| ; RUN: opt < %s -disable-output "-passes=print<da>" -da-enable-dependence-test=weak-crossing-siv 2>&1 \ | ||
| ; RUN: | FileCheck %s --check-prefix=CHECK-WEAK-CROSSING-SIV | ||
|
|
||
| ; max_i = INT64_MAX/3 // 3074457345618258602 | ||
| ; for (long long i = 0; i <= max_i; i++) { | ||
| ; A[-3*i + INT64_MAX] = 0; | ||
| ; if (i) | ||
| ; A[3*i - 2] = 1; | ||
| ; } | ||
| ; | ||
| ; FIXME: DependencyAnalsysis currently detects no dependency between | ||
| ; `A[-3*i + INT64_MAX]` and `A[3*i - 2]`, but it does exist. For example, | ||
| ; | ||
| ; memory location | -3*i + INT64_MAX | 3*i - 2 | ||
| ; ------------------|------------------|----------- | ||
| ; A[1] | i = max_i | i = 1 | ||
| ; A[INT64_MAX - 3] | i = 1 | i = max_i | ||
| ; | ||
| ; The root cause is that the calculation of the differenct between the two | ||
| ; constants (INT64_MAX and -2) triggers an overflow. | ||
|
|
||
| define void @weakcorssing_delta_ovfl(ptr %A) { | ||
| ; CHECK-LABEL: 'weakcorssing_delta_ovfl' | ||
| ; CHECK-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 0, ptr %idx.0, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 1, ptr %idx.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 1, ptr %idx.1, align 1 --> Dst: store i8 1, ptr %idx.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; | ||
| ; CHECK-WEAK-CROSSING-SIV-LABEL: 'weakcorssing_delta_ovfl' | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 0, ptr %idx.0, align 1 | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: da analyze - consistent output [*]! | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 1, ptr %idx.1, align 1 | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: da analyze - none! | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: Src: store i8 1, ptr %idx.1, align 1 --> Dst: store i8 1, ptr %idx.1, align 1 | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: da analyze - consistent output [*]! | ||
| ; | ||
| entry: | ||
| br label %loop.header | ||
|
|
||
| loop.header: | ||
| %i = phi i64 [ 0, %entry ], [ %i.inc, %loop.latch ] | ||
| %subscript.0 = phi i64 [ 9223372036854775807, %entry ], [ %subscript.0.next, %loop.latch ] | ||
| %subscript.1 = phi i64 [ -2, %entry ], [ %subscript.1.next, %loop.latch ] | ||
| %idx.0 = getelementptr inbounds i8, ptr %A, i64 %subscript.0 | ||
| store i8 0, ptr %idx.0 | ||
| %cond.store = icmp ne i64 %i, 0 | ||
| br i1 %cond.store, label %if.store, label %loop.latch | ||
|
|
||
| if.store: | ||
| %idx.1 = getelementptr inbounds i8, ptr %A, i64 %subscript.1 | ||
| store i8 1, ptr %idx.1 | ||
| br label %loop.latch | ||
|
|
||
| loop.latch: | ||
| %i.inc = add nuw nsw i64 %i, 1 | ||
| %subscript.0.next = add nsw i64 %subscript.0, -3 | ||
| %subscript.1.next = add nsw i64 %subscript.1, 3 | ||
| %ec = icmp sgt i64 %i.inc, 3074457345618258602 | ||
| br i1 %ec, label %exit, label %loop.header | ||
|
|
||
| exit: | ||
| ret void | ||
| } | ||
|
|
||
| ; max_i = INT64_MAX/3 // 3074457345618258602 | ||
| ; for (long long i = 0; i <= max_i; i++) { | ||
| ; A[-3*i + INT64_MAX] = 0; | ||
| ; A[3*i + 1] = 1; | ||
| ; } | ||
| ; | ||
| ; FIXME: DependencyAnalsysis currently detects no dependency between | ||
| ; `A[-3*i + INT64_MAX]` and `A[3*i - 2]`, but it does exist. For example, | ||
| ; | ||
| ; memory location | -3*i + INT64_MAX | 3*i + 1 | ||
| ; ------------------|------------------|-------------- | ||
| ; A[1] | i = max_i | i = 0 | ||
| ; A[INT64_MAX - 3] | i = 1 | i = max_i - 1 | ||
| ; | ||
| ; The root cause is that the product of the BTC, the coefficient, and 2 | ||
| ; triggers an overflow. | ||
| ; | ||
| define void @weakcorssing_prod_ovfl(ptr %A) { | ||
| ; CHECK-LABEL: 'weakcorssing_prod_ovfl' | ||
| ; CHECK-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 0, ptr %idx.0, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 1, ptr %idx.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; CHECK-NEXT: Src: store i8 1, ptr %idx.1, align 1 --> Dst: store i8 1, ptr %idx.1, align 1 | ||
| ; CHECK-NEXT: da analyze - none! | ||
| ; | ||
| ; CHECK-WEAK-CROSSING-SIV-LABEL: 'weakcorssing_prod_ovfl' | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 0, ptr %idx.0, align 1 | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: da analyze - consistent output [*]! | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: Src: store i8 0, ptr %idx.0, align 1 --> Dst: store i8 1, ptr %idx.1, align 1 | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: da analyze - none! | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: Src: store i8 1, ptr %idx.1, align 1 --> Dst: store i8 1, ptr %idx.1, align 1 | ||
| ; CHECK-WEAK-CROSSING-SIV-NEXT: da analyze - consistent output [*]! | ||
| ; | ||
| entry: | ||
| br label %loop | ||
|
|
||
| loop: | ||
| %i = phi i64 [ 0, %entry ], [ %i.inc, %loop ] | ||
| %subscript.0 = phi i64 [ 9223372036854775807, %entry ], [ %subscript.0.next, %loop ] | ||
| %subscript.1 = phi i64 [ 1, %entry ], [ %subscript.1.next, %loop ] | ||
| %idx.0 = getelementptr inbounds i8, ptr %A, i64 %subscript.0 | ||
| %idx.1 = getelementptr inbounds i8, ptr %A, i64 %subscript.1 | ||
| store i8 0, ptr %idx.0 | ||
| store i8 1, ptr %idx.1 | ||
| %i.inc = add nuw nsw i64 %i, 1 | ||
| %subscript.0.next = add nsw i64 %subscript.0, -3 | ||
| %subscript.1.next = add nsw i64 %subscript.1, 3 | ||
| %ec = icmp sgt i64 %i.inc, 3074457345618258602 | ||
| br i1 %ec, label %exit, label %loop | ||
|
|
||
| exit: | ||
| ret void | ||
| } |
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This is a bit special; the coefficient have already wrapped. This should be fixed by #164408 .