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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
define i1 @test_imply_not1(i32 %depth) {
; CHECK-LABEL: define i1 @test_imply_not1(
; CHECK-SAME: i32 [[DEPTH:%.*]]) {
; CHECK-NEXT: [[CMP1_NOT1:%.*]] = icmp eq i32 [[DEPTH]], 16
; CHECK-NEXT: call void @use(i1 [[CMP1_NOT1]])
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[DEPTH]], 8
; CHECK-NEXT: call void @use(i1 [[CMP2]])
; CHECK-NEXT: br i1 [[CMP1_NOT1]], label [[IF_ELSE:%.*]], label [[IF_THEN:%.*]]
; CHECK: if.then:
; CHECK-NEXT: call void @func1()
; CHECK-NEXT: unreachable
; CHECK: if.else:
; CHECK-NEXT: call void @func2()
; CHECK-NEXT: unreachable
;
%cmp1 = icmp eq i32 %depth, 16
call void @use(i1 %cmp1)
%cmp2 = icmp slt i32 %depth, 8
call void @use(i1 %cmp2)
%cmp.not = xor i1 %cmp1, true
%brmerge = or i1 %cmp2, %cmp.not
br i1 %brmerge, label %if.then, label %if.else
if.then:
call void @func1()
unreachable
if.else:
call void @func2()
unreachable
}
define i1 @test_imply_not2(i32 %a, i1 %cmp2) {
; CHECK-LABEL: define i1 @test_imply_not2(
; CHECK-SAME: i32 [[A:%.*]], i1 [[CMP2:%.*]]) {
; CHECK-NEXT: [[CMP1:%.*]] = icmp ne i32 [[A]], 0
; CHECK-NEXT: [[BRMERGE:%.*]] = select i1 [[CMP1]], i1 true, i1 [[CMP2]]
; CHECK-NEXT: ret i1 [[BRMERGE]]
;
%cmp1 = icmp eq i32 %a, 0
%or.cond = select i1 %cmp1, i1 %cmp2, i1 false
%cmp.not = xor i1 %cmp1, true
%brmerge = or i1 %or.cond, %cmp.not
ret i1 %brmerge
}
define i1 @test_imply_not3(i32 %a, i32 %b, i1 %cond) {
; CHECK-LABEL: define i1 @test_imply_not3(
; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]], i1 [[COND:%.*]]) {
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A]], [[B]]
; CHECK-NEXT: call void @use(i1 [[CMP1]])
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[A]], [[B]]
; CHECK-NEXT: [[AND:%.*]] = select i1 [[CMP2]], i1 [[COND]], i1 false
; CHECK-NEXT: ret i1 [[AND]]
;
%cmp1 = icmp eq i32 %a, %b
call void @use(i1 %cmp1)
%cmp2 = icmp slt i32 %a, %b
%cmp.not = xor i1 %cmp1, true
%sel = select i1 %cmp.not, i1 %cond, i1 false
%and = and i1 %cmp2, %sel
ret i1 %and
}
declare void @func1()
declare void @func2()
declare void @use(i1)
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