| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| ;; fold (sext (not x)) -> (add (zext x) -1) |
| define i32 @sext_of_not(i1 %x) { |
| ; CHECK-LABEL: sext_of_not: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: nilf %r2, 1 |
| ; CHECK-NEXT: ahi %r2, -1 |
| ; CHECK-NEXT: br %r14 |
| %xor = xor i1 %x, 1 |
| %sext = sext i1 %xor to i32 |
| ret i32 %sext |
| } |
| |
| ;; fold (sext (not (setcc a, b, cc))) -> (sext (setcc a, b, !cc)) |
| define i32 @sext_of_not_cmp(i32 %x) { |
| ; CHECK-LABEL: sext_of_not_cmp: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: chi %r2, 7 |
| ; CHECK-NEXT: ipm %r2 |
| ; CHECK-NEXT: afi %r2, 1879048192 |
| ; CHECK-NEXT: sra %r2, 31 |
| ; CHECK-NEXT: br %r14 |
| %cmp = icmp eq i32 %x, 7 |
| %xor = xor i1 %cmp, 1 |
| %sext = sext i1 %xor to i32 |
| ret i32 %sext |
| } |
| |
| ;; fold (sext (not (setcc a, b, cc))) -> (sext (setcc a, b, !cc)) |
| ;; make sure we don't crash if the not gets replaced in-visit |
| define i32 @sext_of_not_fsetccs(double %x) { |
| ; CHECK-LABEL: sext_of_not_fsetccs: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: ltdbr %f0, %f0 |
| ; CHECK-NEXT: ipm %r0 |
| ; CHECK-NEXT: afi %r0, 1879048192 |
| ; CHECK-NEXT: srl %r0, 31 |
| ; CHECK-NEXT: lcr %r2, %r0 |
| ; CHECK-NEXT: br %r14 |
| %cmp = call i1 @llvm.experimental.constrained.fcmp.f64(double %x, double 0.000000e+00, metadata !"oeq", metadata !"fpexcept.ignore") |
| %xor = xor i1 %cmp, 1 |
| %sext = sext i1 %xor to i32 |
| ret i32 %sext |
| } |
| |
| declare i1 @llvm.experimental.constrained.fcmp.f64(double, double, metadata, metadata) |
| |
| ;; TODO: fold (add (zext (setcc a, b, cc)), -1) -> (sext (setcc a, b, !cc)) |
| define i32 @dec_of_zexted_cmp(i32 %x) { |
| ; CHECK-LABEL: dec_of_zexted_cmp: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: chi %r2, 7 |
| ; CHECK-NEXT: ipm %r2 |
| ; CHECK-NEXT: afi %r2, -268435456 |
| ; CHECK-NEXT: srl %r2, 31 |
| ; CHECK-NEXT: ahi %r2, -1 |
| ; CHECK-NEXT: br %r14 |
| %cmp = icmp eq i32 %x, 7 |
| %zext = zext i1 %cmp to i32 |
| %dec = sub i32 %zext, 1 |
| ret i32 %dec |
| } |