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| ; RUN: opt %loadPolly -basicaa -polly-dependences -analyze < %s | FileCheck %s
;
;
; These are the important RAW dependences, as they need to originate/end in only one iteration:
; Stmt_S1[i0, 1023] -> Stmt_S2[i0, o1]
; Stmt_S1[i0, i1] -> Stmt_S2[i0, 0]
;
; These are the important WAW dependences, as they need to originate/end in only one iteration:
; Stmt_S1[i0, 1023] -> Stmt_S2[i0, o1]
; Stmt_S1[i0, i1] -> Stmt_S2[i0, 0]
;
; CHECK: RAW dependences:
; CHECK-NEXT: { Stmt_S0[i0] -> Stmt_S1[i0, o1] : 0 <= i0 <= 1023 and 0 <= o1 <= 1023; Stmt_S2[i0, i1] -> Stmt_S3[i0] : 0 <= i0 <= 1023 and 0 <= i1 <= 1023; Stmt_S3[i0] -> Stmt_S0[1 + i0] : 0 <= i0 <= 1022; Stmt_S1[i0, 1023] -> Stmt_S2[i0, o1] : 0 <= i0 <= 1023 and 0 <= o1 <= 1023; Stmt_S1[i0, i1] -> Stmt_S2[i0, 0] : 0 <= i0 <= 1023 and 0 <= i1 <= 1022 }
; CHECK-NEXT: WAR dependences:
; CHECK-NEXT: { Stmt_S0[i0] -> Stmt_S1[i0, o1] : 0 <= i0 <= 1023 and 0 <= o1 <= 1023; Stmt_S2[i0, i1] -> Stmt_S3[i0] : 0 <= i0 <= 1023 and 0 <= i1 <= 1023; Stmt_S3[i0] -> Stmt_S0[1 + i0] : 0 <= i0 <= 1022; Stmt_S1[i0, 1023] -> Stmt_S2[i0, o1] : 0 <= i0 <= 1023 and 0 <= o1 <= 1023; Stmt_S1[i0, i1] -> Stmt_S2[i0, 0] : 0 <= i0 <= 1023 and 0 <= i1 <= 1022 }
; CHECK-NEXT: WAW dependences:
; CHECK-NEXT: { Stmt_S0[i0] -> Stmt_S1[i0, o1] : 0 <= i0 <= 1023 and 0 <= o1 <= 1023; Stmt_S2[i0, i1] -> Stmt_S3[i0] : 0 <= i0 <= 1023 and 0 <= i1 <= 1023; Stmt_S3[i0] -> Stmt_S0[1 + i0] : 0 <= i0 <= 1022; Stmt_S1[i0, 1023] -> Stmt_S2[i0, o1] : 0 <= i0 <= 1023 and 0 <= o1 <= 1023; Stmt_S1[i0, i1] -> Stmt_S2[i0, 0] : 0 <= i0 <= 1023 and 0 <= i1 <= 1022 }
; CHECK-NEXT: Reduction dependences:
; CHECK-NEXT: { Stmt_S1[i0, i1] -> Stmt_S1[i0, 1 + i1] : 0 <= i0 <= 1023 and 0 <= i1 <= 1022; Stmt_S2[i0, i1] -> Stmt_S2[i0, 1 + i1] : 0 <= i0 <= 1023 and 0 <= i1 <= 1022 }
;
; void f(int *restrict red) {
; for (int j = 0; j < 1024; j++) {
; S0: *red = 42 + *red * 5;
; for (int i = 0; i < 1024; i++)
; S1: *red *= i;
; for (int i = 0; i < 1024; i++)
; S2: *red += i;
; S3: *red = 42 + *red * 7;
; }
; }
;
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
define void @f(i32* noalias %red) {
entry:
br label %for.cond
for.cond: ; preds = %for.inc15, %entry
%j.0 = phi i32 [ 0, %entry ], [ %inc16, %for.inc15 ]
%exitcond2 = icmp ne i32 %j.0, 1024
br i1 %exitcond2, label %for.body, label %for.end17
for.body: ; preds = %for.cond
br label %S0
S0: ; preds = %for.body
%tmp = load i32, i32* %red, align 4
%mul = mul nsw i32 %tmp, 5
%add = add nsw i32 %mul, 42
store i32 %add, i32* %red, align 4
br label %for.cond1
for.cond1: ; preds = %for.inc, %S0
%i.0 = phi i32 [ 0, %S0 ], [ %inc, %for.inc ]
%exitcond = icmp ne i32 %i.0, 1024
br i1 %exitcond, label %for.body3, label %for.end
for.body3: ; preds = %for.cond1
br label %S1
S1: ; preds = %for.body3
%tmp3 = load i32, i32* %red, align 4
%mul4 = mul nsw i32 %tmp3, %i.0
store i32 %mul4, i32* %red, align 4
br label %for.inc
for.inc: ; preds = %S1
%inc = add nsw i32 %i.0, 1
br label %for.cond1
for.end: ; preds = %for.cond1
br label %for.cond6
for.cond6: ; preds = %for.inc10, %for.end
%i5.0 = phi i32 [ 0, %for.end ], [ %inc11, %for.inc10 ]
%exitcond1 = icmp ne i32 %i5.0, 1024
br i1 %exitcond1, label %for.body8, label %for.end12
for.body8: ; preds = %for.cond6
br label %S2
S2: ; preds = %for.body8
%tmp4 = load i32, i32* %red, align 4
%add9 = add nsw i32 %tmp4, %i5.0
store i32 %add9, i32* %red, align 4
br label %for.inc10
for.inc10: ; preds = %S2
%inc11 = add nsw i32 %i5.0, 1
br label %for.cond6
for.end12: ; preds = %for.cond6
br label %S3
S3: ; preds = %for.end12
%tmp5 = load i32, i32* %red, align 4
%mul13 = mul nsw i32 %tmp5, 7
%add14 = add nsw i32 %mul13, 42
store i32 %add14, i32* %red, align 4
br label %for.inc15
for.inc15: ; preds = %S3
%inc16 = add nsw i32 %j.0, 1
br label %for.cond
for.end17: ; preds = %for.cond
ret void
}
|