40 lines
882 B
LLVM
40 lines
882 B
LLVM
; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
|
|
|
|
define void @x(i1* %cond) {
|
|
; CHECK-LABEL: Classifying expressions for: @x
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%idx = phi i8 [ 0, %entry ], [ %idx.inc, %loop ]
|
|
; CHECK: %idx = phi i8 [ 0, %entry ], [ %idx.inc, %loop ]
|
|
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-128) S: [0,-128)
|
|
|
|
%idx.inc = add nsw i8 %idx, 1
|
|
|
|
%c = load volatile i1, i1* %cond
|
|
br i1 %c, label %loop, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
define void @y(i8* %addr) {
|
|
; CHECK-LABEL: Classifying expressions for: @y
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%idx = phi i8 [-5, %entry ], [ %idx.inc, %loop ]
|
|
; CHECK: %idx = phi i8 [ -5, %entry ], [ %idx.inc, %loop ]
|
|
; CHECK-NEXT: --> {-5,+,1}<%loop> U: [-5,6) S: [-5,6)
|
|
|
|
%idx.inc = add i8 %idx, 1
|
|
|
|
%continue = icmp slt i8 %idx.inc, 6
|
|
br i1 %continue, label %loop, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|