33 lines
850 B
LLVM
33 lines
850 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -instsimplify -S | FileCheck %s
|
|
|
|
; %result = x & (1 ^ sel) = (x & 1) ^ (x & sel)
|
|
; = x ^ (select cond, false, false)
|
|
; = x ^ false = x
|
|
;
|
|
define i1 @f(i1 %cond, i1 noundef %x, i1 %y, i1 %z) {
|
|
; CHECK-LABEL: @f(
|
|
; CHECK-NEXT: ret i1 [[X:%.*]]
|
|
;
|
|
%notx = xor i1 %x, 1
|
|
%lhs = and i1 %notx, %y
|
|
%rhs = and i1 %notx, %z
|
|
%sel = select i1 %cond, i1 %lhs, i1 %rhs
|
|
%op1 = xor i1 1, %sel
|
|
%result = and i1 %x, %op1
|
|
ret i1 %result
|
|
}
|
|
|
|
define i1 @f_dontfold(i1 %cond, i1 %x, i1 %y, i1 %z) {
|
|
; CHECK-LABEL: @f_dontfold(
|
|
; CHECK-NEXT: ret i1 [[X:%.*]]
|
|
;
|
|
%notx = xor i1 %x, 1
|
|
%lhs = and i1 %notx, %y
|
|
%rhs = and i1 %notx, %z
|
|
%sel = select i1 %cond, i1 %lhs, i1 %rhs
|
|
%op1 = xor i1 1, %sel
|
|
%result = and i1 %x, %op1
|
|
ret i1 %result
|
|
}
|