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46 lines
1.2 KiB
46 lines
1.2 KiB
4 months ago
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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;; fold (sext (not x)) -> (add (zext x) -1)
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define i32 @sext_of_not(i1 %x) {
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; CHECK-LABEL: sext_of_not:
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; CHECK: # %bb.0:
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; CHECK-NEXT: nilf %r2, 1
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; CHECK-NEXT: ahi %r2, -1
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; CHECK-NEXT: br %r14
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%xor = xor i1 %x, 1
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%sext = sext i1 %xor to i32
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ret i32 %sext
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}
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;; fold (sext (not (setcc a, b, cc))) -> (sext (setcc a, b, !cc))
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define i32 @sext_of_not_cmp(i32 %x) {
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; CHECK-LABEL: sext_of_not_cmp:
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; CHECK: # %bb.0:
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; CHECK-NEXT: chi %r2, 7
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; CHECK-NEXT: ipm %r2
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; CHECK-NEXT: afi %r2, 1879048192
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; CHECK-NEXT: sra %r2, 31
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; CHECK-NEXT: br %r14
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%cmp = icmp eq i32 %x, 7
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%xor = xor i1 %cmp, 1
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%sext = sext i1 %xor to i32
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ret i32 %sext
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}
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;; TODO: fold (add (zext (setcc a, b, cc)), -1) -> (sext (setcc a, b, !cc))
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define i32 @dec_of_zexted_cmp(i32 %x) {
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; CHECK-LABEL: dec_of_zexted_cmp:
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; CHECK: # %bb.0:
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; CHECK-NEXT: chi %r2, 7
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; CHECK-NEXT: ipm %r2
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; CHECK-NEXT: afi %r2, -268435456
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; CHECK-NEXT: srl %r2, 31
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; CHECK-NEXT: ahi %r2, -1
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; CHECK-NEXT: br %r14
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%cmp = icmp eq i32 %x, 7
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%zext = zext i1 %cmp to i32
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%dec = sub i32 %zext, 1
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ret i32 %dec
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}
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