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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -gvn -S | FileCheck %s
; RUN: opt < %s -passes=gvn -S | FileCheck %s
define i1 @f(i1 %a) {
; CHECK-LABEL: @f(
; CHECK-NEXT: [[B:%.*]] = freeze i1 [[A:%.*]]
; CHECK-NEXT: ret i1 [[B]]
;
%b = freeze i1 %a
%c = freeze i1 %a
%d = and i1 %b, %b
ret i1 %d
}
define void @f_multipleuses(i1 %a) {
; CHECK-LABEL: @f_multipleuses(
; CHECK-NEXT: [[B:%.*]] = freeze i1 [[A:%.*]]
; CHECK-NEXT: call void @use1(i1 [[B]])
; CHECK-NEXT: call void @use1(i1 [[B]])
; CHECK-NEXT: call void @use1(i1 [[B]])
; CHECK-NEXT: ret void
;
%b = freeze i1 %a
%c = freeze i1 %a
call void @use1(i1 %b)
call void @use1(i1 %c)
call void @use1(i1 %c)
ret void
}
define void @f_dom(i1 %cond, i1 %a) {
; CHECK-LABEL: @f_dom(
; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: BB1:
; CHECK-NEXT: [[X:%.*]] = freeze i1 [[A:%.*]]
; CHECK-NEXT: call void @use1(i1 [[X]])
; CHECK-NEXT: ret void
; CHECK: BB2:
; CHECK-NEXT: [[Y:%.*]] = freeze i1 [[A]]
; CHECK-NEXT: call void @use2(i1 [[Y]])
; CHECK-NEXT: ret void
;
br i1 %cond, label %BB1, label %BB2
BB1:
%x = freeze i1 %a
call void @use1(i1 %x)
ret void
BB2:
%y = freeze i1 %a
call void @use2(i1 %y) ; cannot use %x
ret void
}
declare void @use1(i1)
declare void @use2(i1)
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