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| ; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
target triple = "x86_64-unknown-linux-gnu"
; CHECK-LABEL: Printing analysis 'Scalar Evolution Analysis' for function 'f0':
; CHECK-NEXT: Classifying expressions for: @f0
; CHECK-NEXT: %v0 = phi i16 [ 2, %b0 ], [ %v2, %b1 ]
; CHECK-NEXT: --> {2,+,1}<nuw><nsw><%b1> U: [2,4) S: [2,4) Exits: 3 LoopDispositions: { %b1: Computable }
; CHECK-NEXT: %v1 = phi i16 [ 1, %b0 ], [ %v3, %b1 ]
; CHECK-NEXT: --> {1,+,2,+,1}<%b1> U: full-set S: full-set Exits: 3 LoopDispositions: { %b1: Computable }
; CHECK-NEXT: %v2 = add nsw i16 %v0, 1
; CHECK-NEXT: --> {3,+,1}<nuw><nsw><%b1> U: [3,5) S: [3,5) Exits: 4 LoopDispositions: { %b1: Computable }
; CHECK-NEXT: %v3 = add nsw i16 %v1, %v0
; CHECK-NEXT: --> {3,+,3,+,1}<%b1> U: full-set S: full-set Exits: 6 LoopDispositions: { %b1: Computable }
; CHECK-NEXT: %v4 = and i16 %v3, 1
; CHECK-NEXT: --> (zext i1 {true,+,true,+,true}<%b1> to i16) U: [0,2) S: [0,2) Exits: 0 LoopDispositions: { %b1: Computable }
; CHECK-NEXT: Determining loop execution counts for: @f0
; CHECK-NEXT: Loop %b1: backedge-taken count is 1
; CHECK-NEXT: Loop %b1: max backedge-taken count is 1
; CHECK-NEXT: Loop %b1: Predicated backedge-taken count is 1
; CHECK-NEXT: Predicates:
; CHECK-EMPTY:
; CHECK-NEXT: Loop %b1: Trip multiple is 2
define void @f0() {
b0:
br label %b1
b1: ; preds = %b1, %b0
%v0 = phi i16 [ 2, %b0 ], [ %v2, %b1 ]
%v1 = phi i16 [ 1, %b0 ], [ %v3, %b1 ]
%v2 = add nsw i16 %v0, 1
%v3 = add nsw i16 %v1, %v0
%v4 = and i16 %v3, 1
%v5 = icmp ne i16 %v4, 0
br i1 %v5, label %b1, label %b2
b2: ; preds = %b1
ret void
}
@g0 = common dso_local global i16 0, align 2
@g1 = common dso_local global i32 0, align 4
@g2 = common dso_local global i32* null, align 8
; CHECK-LABEL: Printing analysis 'Scalar Evolution Analysis' for function 'f1':
; CHECK-NEXT: Classifying expressions for: @f1
; CHECK-NEXT: %v0 = phi i16 [ 0, %b0 ], [ %v3, %b1 ]
; CHECK-NEXT: --> {0,+,3,+,1}<%b1> U: full-set S: full-set Exits: 7 LoopDispositions: { %b1: Computable }
; CHECK-NEXT: %v1 = phi i32 [ 3, %b0 ], [ %v6, %b1 ]
; CHECK-NEXT: --> {3,+,1}<nuw><nsw><%b1> U: [3,6) S: [3,6) Exits: 5 LoopDispositions: { %b1: Computable }
; CHECK-NEXT: %v2 = trunc i32 %v1 to i16
; CHECK-NEXT: --> {3,+,1}<%b1> U: [3,6) S: [3,6) Exits: 5 LoopDispositions: { %b1: Computable }
; CHECK-NEXT: %v3 = add i16 %v0, %v2
; CHECK-NEXT: --> {3,+,4,+,1}<%b1> U: full-set S: full-set Exits: 12 LoopDispositions: { %b1: Computable }
; CHECK-NEXT: %v4 = and i16 %v3, 1
; CHECK-NEXT: --> (zext i1 {true,+,false,+,true}<%b1> to i16) U: [0,2) S: [0,2) Exits: 0 LoopDispositions: { %b1: Computable }
; CHECK-NEXT: %v6 = add nuw nsw i32 %v1, 1
; CHECK-NEXT: --> {4,+,1}<nuw><nsw><%b1> U: [4,7) S: [4,7) Exits: 6 LoopDispositions: { %b1: Computable }
; CHECK-NEXT: %v7 = phi i32 [ %v1, %b1 ]
; CHECK-NEXT: --> %v7 U: [3,6) S: [3,6)
; CHECK-NEXT: %v8 = phi i16 [ %v3, %b1 ]
; CHECK-NEXT: --> %v8 U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @f1
; CHECK-NEXT: Loop %b3: <multiple exits> Unpredictable backedge-taken count.
; CHECK-NEXT: Loop %b3: Unpredictable max backedge-taken count.
; CHECK-NEXT: Loop %b3: Unpredictable predicated backedge-taken count.
; CHECK-NEXT: Loop %b1: backedge-taken count is 2
; CHECK-NEXT: Loop %b1: max backedge-taken count is 2
; CHECK-NEXT: Loop %b1: Predicated backedge-taken count is 2
; CHECK-NEXT: Predicates:
; CHECK-EMPTY:
; CHECK-NEXT: Loop %b1: Trip multiple is 3
define void @f1() #0 {
b0:
store i16 0, i16* @g0, align 2
store i32* @g1, i32** @g2, align 8
br label %b1
b1: ; preds = %b1, %b0
%v0 = phi i16 [ 0, %b0 ], [ %v3, %b1 ]
%v1 = phi i32 [ 3, %b0 ], [ %v6, %b1 ]
%v2 = trunc i32 %v1 to i16
%v3 = add i16 %v0, %v2
%v4 = and i16 %v3, 1
%v5 = icmp eq i16 %v4, 0
%v6 = add nuw nsw i32 %v1, 1
br i1 %v5, label %b2, label %b1
b2: ; preds = %b1
%v7 = phi i32 [ %v1, %b1 ]
%v8 = phi i16 [ %v3, %b1 ]
store i32 %v7, i32* @g1, align 4
store i16 %v8, i16* @g0, align 2
br label %b3
b3: ; preds = %b3, %b2
br label %b3
}
attributes #0 = { nounwind uwtable "target-cpu"="x86-64" }
|