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[InstCombine] Add cttz/ctlz + select non-bitwidth tests; NFC

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llvm-svn: 349322
This commit is contained in:
Nikita Popov 2018-12-16 23:48:18 +00:00
parent b018fd8e94
commit 38e5dd7e13
1 changed files with 56 additions and 0 deletions
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56
test/Transforms/InstCombine/select-cmp-cttz-ctlz.ll
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@ -343,6 +343,62 @@ define i128 @test8(i128 %x) {
ret i128 %cond
}
define i32 @test_ctlz_not_bw(i32 %x) {
; CHECK-LABEL: @test_ctlz_not_bw(
; CHECK-NEXT: [[CT:%.*]] = tail call i32 @llvm.ctlz.i32(i32 [[X:%.*]], i1 false), !range !1
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X]], 0
; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 123, i32 [[CT]]
; CHECK-NEXT: ret i32 [[RES]]
;
%ct = tail call i32 @llvm.ctlz.i32(i32 %x, i1 false)
%cmp = icmp ne i32 %x, 0
%res = select i1 %cmp, i32 %ct, i32 123
ret i32 %res
}
define i32 @test_ctlz_not_bw_multiuse(i32 %x) {
; CHECK-LABEL: @test_ctlz_not_bw_multiuse(
; CHECK-NEXT: [[CT:%.*]] = tail call i32 @llvm.ctlz.i32(i32 [[X:%.*]], i1 false), !range !1
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X]], 0
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 123, i32 [[CT]]
; CHECK-NEXT: [[RES:%.*]] = or i32 [[SEL]], [[CT]]
; CHECK-NEXT: ret i32 [[RES]]
;
%ct = tail call i32 @llvm.ctlz.i32(i32 %x, i1 false)
%cmp = icmp ne i32 %x, 0
%sel = select i1 %cmp, i32 %ct, i32 123
%res = or i32 %sel, %ct
ret i32 %res
}
define i32 @test_cttz_not_bw(i32 %x) {
; CHECK-LABEL: @test_cttz_not_bw(
; CHECK-NEXT: [[CT:%.*]] = tail call i32 @llvm.cttz.i32(i32 [[X:%.*]], i1 false), !range !1
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X]], 0
; CHECK-NEXT: [[RES:%.*]] = select i1 [[CMP]], i32 123, i32 [[CT]]
; CHECK-NEXT: ret i32 [[RES]]
;
%ct = tail call i32 @llvm.cttz.i32(i32 %x, i1 false)
%cmp = icmp ne i32 %x, 0
%res = select i1 %cmp, i32 %ct, i32 123
ret i32 %res
}
define i32 @test_cttz_not_bw_multiuse(i32 %x) {
; CHECK-LABEL: @test_cttz_not_bw_multiuse(
; CHECK-NEXT: [[CT:%.*]] = tail call i32 @llvm.cttz.i32(i32 [[X:%.*]], i1 false), !range !1
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X]], 0
; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 123, i32 [[CT]]
; CHECK-NEXT: [[RES:%.*]] = or i32 [[SEL]], [[CT]]
; CHECK-NEXT: ret i32 [[RES]]
;
%ct = tail call i32 @llvm.cttz.i32(i32 %x, i1 false)
%cmp = icmp ne i32 %x, 0
%sel = select i1 %cmp, i32 %ct, i32 123
%res = or i32 %sel, %ct
ret i32 %res
}
declare i16 @llvm.ctlz.i16(i16, i1)
declare i32 @llvm.ctlz.i32(i32, i1)
declare i64 @llvm.ctlz.i64(i64, i1)