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[InstCombine] auto-generate test checks; NFC

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llvm-svn: 310101
This commit is contained in:
Sanjay Patel 2017-08-04 19:29:32 +00:00
parent fc2861a8a6
commit 5db0c30b42
1 changed files with 19 additions and 22 deletions
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41
test/Transforms/InstCombine/fls.ll
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@ -2,52 +2,49 @@
target triple = "x86_64-unknown-freebsd11.0"
; CHECK-LABEL: define i32 @myfls(
; CHECK: ret i32 6
; CHECK: }
define i32 @myfls() {
entry:
; CHECK-LABEL: @myfls(
; CHECK-NEXT: ret i32 6
;
%call = call i32 @fls(i32 42)
ret i32 %call
}
; CHECK-LABEL: define i32 @myflsl(
; CHECK: ret i32 6
; CHECK: }
define i32 @myflsl() {
; CHECK-LABEL: @myflsl(
; CHECK-NEXT: ret i32 6
;
%patatino = call i32 @flsl(i64 42)
ret i32 %patatino
}
; CHECK-LABEL: define i32 @myflsll(
; CHECK: ret i32 6
; CHECK: }
define i32 @myflsll() {
; CHECK-LABEL: @myflsll(
; CHECK-NEXT: ret i32 6
;
%whatever = call i32 @flsll(i64 42)
ret i32 %whatever
}
; Lower to llvm.ctlz() if the argument is not a constant
; CHECK-LABEL: define i32 @flsnotconst(
; CHECK-NEXT: %ctlz = call i64 @llvm.ctlz.i64(i64 %z, i1 false)
; CHECK-NEXT: %1 = sub nsw i64 64, %ctlz
; CHECK-NEXT: %2 = trunc i64 %1 to i32
; CHECK-NEXT: ret i32 %2
define i32 @flsnotconst(i64 %z) {
; CHECK-LABEL: @flsnotconst(
; CHECK-NEXT: [[CTLZ:%.*]] = call i64 @llvm.ctlz.i64(i64 %z, i1 false), !range !0
; CHECK-NEXT: [[TMP1:%.*]] = sub nsw i64 64, [[CTLZ]]
; CHECK-NEXT: [[TMP2:%.*]] = trunc i64 [[TMP1]] to i32
; CHECK-NEXT: ret i32 [[TMP2]]
;
%goo = call i32 @flsl(i64 %z)
ret i32 %goo
}
; Make sure we lower fls(0) to 0 and not to `undef`.
; CHECK-LABEL: define i32 @flszero(
; CHECK: ret i32 0
; CHECK: }
define i32 @flszero() {
; CHECK-LABEL: @flszero(
; CHECK-NEXT: ret i32 0
;
%zero = call i32 @fls(i32 0)
ret i32 %zero
}