scev-dispositions.ll
2.54 KB
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; RUN: opt -analyze -enable-new-pm=0 -scalar-evolution < %s | FileCheck %s
; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
define void @single_loop(i32* %buf, i32 %start) {
; CHECK-LABEL: Classifying expressions for: @single_loop
entry:
%val = add i32 %start, 400
br label %loop
loop:
%counter = phi i32 [ 0, %entry ], [ %counter.inc, %loop ]
%idx = phi i32 [ %start, %entry ], [ %idx.inc, %loop ]
; CHECK: %counter = phi i32 [ 0, %entry ], [ %counter.inc, %loop ]
; CHECK-NEXT: --> {{.*}} LoopDispositions: { %loop: Computable }
; CHECK: %idx = phi i32 [ %start, %entry ], [ %idx.inc, %loop ]
; CHECK-NEXT: --> {{.*}} LoopDispositions: { %loop: Computable }
; CHECK: %val2 = add i32 %start, 400
; CHECK-NEXT: --> {{.*}} LoopDispositions: { %loop: Invariant }
; CHECK: %idx.inc = add nsw i32 %idx, 1
; CHECK-NEXT: --> {{.*}} LoopDispositions: { %loop: Computable }
; CHECK: %val3 = load volatile i32, i32* %buf
; CHECK-NEXT: --> {{.*}} LoopDispositions: { %loop: Variant }
%val2 = add i32 %start, 400
%idx.inc = add nsw i32 %idx, 1
%idx.inc.sext = sext i32 %idx.inc to i64
%condition = icmp eq i32 %counter, 1
%counter.inc = add i32 %counter, 1
%val3 = load volatile i32, i32* %buf
br i1 %condition, label %exit, label %loop
exit:
ret void
}
define void @nested_loop(double* %p, i64 %m) {
; CHECK-LABEL: Classifying expressions for: @nested_loop
; CHECK: %j = phi i64 [ 0, %entry ], [ %j.next, %outer.latch ]
; CHECK-NEXT: --> {{.*}} LoopDispositions: { %outer.loop: Computable, %bb: Invariant }
; CHECK: %i = phi i64 [ 0, %outer.loop ], [ %i.next, %bb ]
; CHECK-NEXT: --> {{.*}} LoopDispositions: { %bb: Computable, %outer.loop: Variant }
; CHECK: %j.add = add i64 %j, 100
; CHECK-NEXT: --> {{.*}} LoopDispositions: { %bb: Invariant, %outer.loop: Computable }
; CHECK: %i.next = add i64 %i, 1
; CHECK-NEXT: --> {{.*}} LoopDispositions: { %bb: Computable, %outer.loop: Variant }
; CHECK: %j.next = add i64 %j, 91
; CHECK-NEXT: --> {{.*}} LoopDispositions: { %outer.loop: Computable, %bb: Invariant }
entry:
%k = icmp sgt i64 %m, 0
br i1 %k, label %outer.loop, label %return
outer.loop:
%j = phi i64 [ 0, %entry ], [ %j.next, %outer.latch ]
br label %bb
bb:
%i = phi i64 [ 0, %outer.loop ], [ %i.next, %bb ]
%j.add = add i64 %j, 100
%i.next = add i64 %i, 1
%exitcond = icmp eq i64 %i.next, 91
br i1 %exitcond, label %outer.latch, label %bb
outer.latch:
%j.next = add i64 %j, 91
%h = icmp eq i64 %j.next, %m
br i1 %h, label %return, label %outer.loop
return:
ret void
}