freeze.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -licm -S < %s | FileCheck %s
define void @hoist(i1 %a) {
; CHECK-LABEL: @hoist(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[B:%.*]] = freeze i1 [[A:%.*]]
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: call void @use(i1 [[B]])
; CHECK-NEXT: br label [[LOOP]]
;
entry:
br label %loop
loop:
%b = freeze i1 %a
call void @use(i1 %b)
br label %loop
}
define i1 @sink(i1 %a) {
; CHECK-LABEL: @sink(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[C:%.*]] = call i1 @cond()
; CHECK-NEXT: br i1 [[C]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: [[FR_LE:%.*]] = freeze i1 [[A:%.*]]
; CHECK-NEXT: ret i1 [[FR_LE]]
;
entry:
br label %loop
loop:
%fr = freeze i1 %a
%c = call i1 @cond()
br i1 %c, label %loop, label %exit
exit:
ret i1 %fr
}
declare i1 @cond()
declare void @use(i1)