ext-antecedent.ll
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; RUN: opt -S -indvars < %s | FileCheck %s
declare void @use(i1)
define void @sext_condition(i8 %t) {
; CHECK-LABEL: sext_condition
entry:
%st = sext i8 %t to i16
%ecmp = icmp slt i16 %st, 42
br i1 %ecmp, label %loop, label %exit
loop:
; CHECK-LABEL: loop
%idx = phi i8 [ %t, %entry ], [ %idx.inc, %loop ]
%idx.inc = add i8 %idx, 1
%c = icmp slt i8 %idx, 42
; CHECK: call void @use(i1 true)
call void @use(i1 %c)
%be = icmp slt i8 %idx.inc, 42
br i1 %be, label %loop, label %exit
exit:
ret void
}
define void @zext_condition(i8 %t) {
; CHECK-LABEL: zext_condition
entry:
%st = zext i8 %t to i16
%ecmp = icmp ult i16 %st, 42
br i1 %ecmp, label %loop, label %exit
loop:
; CHECK-LABEL: loop
%idx = phi i8 [ %t, %entry ], [ %idx.inc, %loop ]
%idx.inc = add i8 %idx, 1
%c = icmp ult i8 %idx, 42
; CHECK: call void @use(i1 true)
call void @use(i1 %c)
%be = icmp ult i8 %idx.inc, 42
br i1 %be, label %loop, label %exit
exit:
ret void
}