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54552bfee6
This patch corresponds to review: https://reviews.llvm.org/D25896 It just eliminates the redundant ZExt after a count trailing zeros instruction. llvm-svn: 285267
55 lines
1.2 KiB
LLVM
55 lines
1.2 KiB
LLVM
; Function Attrs: nounwind readnone
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; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-unknown \
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; RUN: -mcpu=pwr9 < %s | FileCheck %s
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define signext i32 @ctw(i32 signext %a) {
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entry:
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%0 = tail call i32 @llvm.cttz.i32(i32 %a, i1 false)
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ret i32 %0
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; CHECK-LABEL: ctw
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; CHECK: cnttzw 3, 3
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; CHECK-NEXT: blr
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}
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; Function Attrs: nounwind readnone
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declare i32 @llvm.cttz.i32(i32, i1)
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; Function Attrs: nounwind readnone
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define signext i32 @clw(i32 signext %a) {
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entry:
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%0 = tail call i32 @llvm.ctlz.i32(i32 %a, i1 false)
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ret i32 %0
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; CHECK-LABEL: clw
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; CHECK: cntlzw 3, 3
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; CHECK-NEXT: blr
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}
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; Function Attrs: nounwind readnone
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declare i32 @llvm.ctlz.i32(i32, i1)
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; Function Attrs: nounwind readnone
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define i64 @ctd(i64 %a) {
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entry:
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%0 = tail call i64 @llvm.cttz.i64(i64 %a, i1 false)
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ret i64 %0
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; CHECK-LABEL: ctd
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; CHECK: cnttzd 3, 3
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; CHECK-NEXT: blr
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}
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; Function Attrs: nounwind readnone
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declare i64 @llvm.cttz.i64(i64, i1)
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; Function Attrs: nounwind readnone
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define i64 @cld(i64 %a) {
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entry:
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%0 = tail call i64 @llvm.ctlz.i64(i64 %a, i1 false)
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ret i64 %0
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; CHECK-LABEL: cld
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; CHECK: cntlzd 3, 3
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; CHECK-NEXT: blr
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}
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; Function Attrs: nounwind readnone
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declare i64 @llvm.ctlz.i64(i64, i1)
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