28 lines
816 B
LLVM
28 lines
816 B
LLVM
; RUN: opt -analyze -enable-new-pm=0 -scalar-evolution -scalar-evolution < %s | FileCheck %s
|
|
; RUN: opt -disable-output "-passes=print<scalar-evolution>,print<scalar-evolution>" < %s 2>&1 | FileCheck %s
|
|
|
|
define void @bad.nsw() {
|
|
; CHECK-LABEL: Classifying expressions for: @bad.nsw
|
|
; CHECK-LABEL: Classifying expressions for: @bad.nsw
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%i = phi i8 [ -1, %entry ], [ %i.inc, %loop ]
|
|
; CHECK: %i = phi i8 [ -1, %entry ], [ %i.inc, %loop ]
|
|
; CHECK-NEXT: --> {-1,+,-128}<nw><%loop>
|
|
; CHECK-NOT: --> {-1,+,-128}<nsw><%loop>
|
|
|
|
%counter = phi i8 [ 0, %entry ], [ %counter.inc, %loop ]
|
|
|
|
%i.inc = add i8 %i, -128
|
|
%i.sext = sext i8 %i to i16
|
|
|
|
%counter.inc = add i8 %counter, 1
|
|
%continue = icmp eq i8 %counter, 1
|
|
br i1 %continue, label %exit, label %loop
|
|
|
|
exit:
|
|
ret void
|
|
}
|