derek.holloway
7502bf64a4
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101 lines
2.9 KiB
LLVM
101 lines
2.9 KiB
LLVM
; Test memset in cases where a loop is used.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare void @llvm.memset.p0.i32(ptr nocapture, i8, i32, i1) nounwind
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declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) nounwind
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; Constant length: 6 iterations and 2 bytes remainder.
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define void @f1(ptr %dest, i8 %val) {
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; CHECK-LABEL: f1:
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; CHECK: lghi [[COUNT:%r[0-5]]], 6
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; CHECK: [[LABEL:\.L[^:]*]]:
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; CHECK: pfd 2, 768(%r2)
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; CHECK: stc %r3, 0(%r2)
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; CHECK: mvc 1(255,%r2), 0(%r2)
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; CHECK: la %r2, 256(%r2)
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; CHECK: brctg [[COUNT]], [[LABEL]]
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; CHECK: stc %r3, 0(%r2)
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; CHECK-NEXT: mvc 1(1,%r2), 0(%r2)
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; CHECK-NEXT: br %r14
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call void @llvm.memset.p0.i64(ptr %dest, i8 %val, i64 1538, i1 false)
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ret void
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}
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; Constant length: 6 iterations and 255 bytes remainder.
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define void @f2(ptr %dest) {
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; CHECK-LABEL: f2:
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; CHECK: lghi [[COUNT:%r[0-5]]], 6
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; CHECK: [[LABEL:\.L[^:]*]]:
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; CHECK: pfd 2, 768(%r2)
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; CHECK: mvi 0(%r2), 1
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; CHECK: mvc 1(255,%r2), 0(%r2)
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; CHECK: la %r2, 256(%r2)
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; CHECK: brctg [[COUNT]], [[LABEL]]
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; CHECK: mvi 0(%r2), 1
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; CHECK-NEXT: mvc 1(254,%r2), 0(%r2)
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; CHECK-NEXT: br %r14
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call void @llvm.memset.p0.i32(ptr %dest, i8 1, i32 1791, i1 false)
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ret void
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}
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; Variable length, byte in register.
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define void @f3(ptr %dest, i8 %val, i64 %Len) {
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; CHECK-LABEL: f3:
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; CHECK: # %bb.0:
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; CHECK-NEXT: aghi %r4, -2
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; CHECK-NEXT: cgibe %r4, -2, 0(%r14)
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; CHECK-NEXT: .LBB2_1:
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; CHECK-NEXT: cgije %r4, -1, .LBB2_5
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; CHECK-NEXT:# %bb.2:
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; CHECK-NEXT: srlg %r0, %r4, 8
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; CHECK-NEXT: cgije %r0, 0, .LBB2_4
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; CHECK-NEXT:.LBB2_3: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: pfd 2, 768(%r2)
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; CHECK-NEXT: stc %r3, 0(%r2)
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; CHECK-NEXT: mvc 1(255,%r2), 0(%r2)
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; CHECK-NEXT: la %r2, 256(%r2)
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; CHECK-NEXT: brctg %r0, .LBB2_3
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; CHECK-NEXT:.LBB2_4:
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; CHECK-NEXT: stc %r3, 0(%r2)
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; CHECK-NEXT: exrl %r4, .Ltmp0
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; CHECK-NEXT: br %r14
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; CHECK-NEXT:.LBB2_5:
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; CHECK-NEXT: stc %r3, 0(%r2)
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; CHECK-NEXT: br %r14
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call void @llvm.memset.p0.i64(ptr %dest, i8 %val, i64 %Len, i1 false)
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ret void
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}
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; Variable length, immediate byte.
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define void @f4(ptr %dest, i32 %Len) {
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; CHECK-LABEL: f4:
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; CHECK: # %bb.0:
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; CHECK-NEXT: llgfr %r1, %r3
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; CHECK-NEXT: aghi %r1, -2
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; CHECK-NEXT: cgibe %r1, -2, 0(%r14)
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; CHECK-NEXT:.LBB3_1:
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; CHECK-NEXT: cgije %r1, -1, .LBB3_5
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; CHECK-NEXT:# %bb.2:
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; CHECK-NEXT: srlg %r0, %r1, 8
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; CHECK-NEXT: cgije %r0, 0, .LBB3_4
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; CHECK-NEXT:.LBB3_3: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: pfd 2, 768(%r2)
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; CHECK-NEXT: mvi 0(%r2), 1
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; CHECK-NEXT: mvc 1(255,%r2), 0(%r2)
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; CHECK-NEXT: la %r2, 256(%r2)
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; CHECK-NEXT: brctg %r0, .LBB3_3
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; CHECK-NEXT:.LBB3_4:
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; CHECK-NEXT: mvi 0(%r2), 1
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; CHECK-NEXT: exrl %r1, .Ltmp0
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; CHECK-NEXT: br %r14
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; CHECK-NEXT:.LBB3_5:
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; CHECK-NEXT: mvi 0(%r2), 1
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; CHECK-NEXT: br %r14
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call void @llvm.memset.p0.i32(ptr %dest, i8 1, i32 %Len, i1 false)
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ret void
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}
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; CHECK: .Ltmp0:
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; CHECK-NEXT: mvc 1(1,%r2), 0(%r2)
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