derek.holloway
7502bf64a4
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221 lines
5.9 KiB
LLVM
221 lines
5.9 KiB
LLVM
; Test memset in cases where the set value is variable.
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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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; No bytes, i32 version.
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define void @f1(ptr %dest, i8 %val) {
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; CHECK-LABEL: f1:
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; CHECK-NOT: %r2
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; CHECK-NOT: %r3
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; CHECK: br %r14
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call void @llvm.memset.p0.i32(ptr %dest, i8 %val, i32 0, i1 false)
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ret void
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}
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; No bytes, i64 version.
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define void @f2(ptr %dest, i8 %val) {
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; CHECK-LABEL: f2:
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; CHECK-NOT: %r2
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; CHECK-NOT: %r3
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; CHECK: br %r14
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call void @llvm.memset.p0.i64(ptr %dest, i8 %val, i64 0, i1 false)
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ret void
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}
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; 1 byte, i32 version.
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define void @f3(ptr %dest, i8 %val) {
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; CHECK-LABEL: f3:
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; CHECK: stc %r3, 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0.i32(ptr %dest, i8 %val, i32 1, i1 false)
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ret void
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}
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; 1 byte, i64 version.
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define void @f4(ptr %dest, i8 %val) {
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; CHECK-LABEL: f4:
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; CHECK: stc %r3, 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0.i64(ptr %dest, i8 %val, i64 1, i1 false)
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ret void
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}
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; 2 bytes, i32 version.
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define void @f5(ptr %dest, i8 %val) {
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; CHECK-LABEL: f5:
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; CHECK-DAG: stc %r3, 0(%r2)
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; CHECK-DAG: stc %r3, 1(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0.i32(ptr %dest, i8 %val, i32 2, i1 false)
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ret void
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}
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; 2 bytes, i64 version.
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define void @f6(ptr %dest, i8 %val) {
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; CHECK-LABEL: f6:
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; CHECK-DAG: stc %r3, 0(%r2)
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; CHECK-DAG: stc %r3, 1(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0.i64(ptr %dest, i8 %val, i64 2, i1 false)
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ret void
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}
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; 3 bytes, i32 version.
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define void @f7(ptr %dest, i8 %val) {
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; CHECK-LABEL: f7:
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; CHECK: stc %r3, 0(%r2)
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; CHECK: mvc 1(2,%r2), 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0.i32(ptr %dest, i8 %val, i32 3, i1 false)
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ret void
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}
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; 3 bytes, i64 version.
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define void @f8(ptr %dest, i8 %val) {
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; CHECK-LABEL: f8:
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; CHECK: stc %r3, 0(%r2)
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; CHECK: mvc 1(2,%r2), 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0.i64(ptr %dest, i8 %val, i64 3, i1 false)
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ret void
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}
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; 257 bytes, i32 version.
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define void @f9(ptr %dest, i8 %val) {
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; CHECK-LABEL: f9:
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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: stc %r3, 256(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0.i32(ptr %dest, i8 %val, i32 257, i1 false)
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ret void
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}
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; 257 bytes, i64 version.
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define void @f10(ptr %dest, i8 %val) {
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; CHECK-LABEL: f10:
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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: stc %r3, 256(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0.i64(ptr %dest, i8 %val, i64 257, i1 false)
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ret void
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}
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; 258 bytes, i32 version. We need two MVCs.
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define void @f11(ptr %dest, i8 %val) {
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; CHECK-LABEL: f11:
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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: stc %r3, 256(%r2)
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; CHECK: mvc 257(1,%r2), 256(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0.i32(ptr %dest, i8 %val, i32 258, i1 false)
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ret void
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}
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; 258 bytes, i64 version.
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define void @f12(ptr %dest, i8 %val) {
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; CHECK-LABEL: f12:
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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: stc %r3, 256(%r2)
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; CHECK: mvc 257(1,%r2), 256(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0.i64(ptr %dest, i8 %val, i64 258, i1 false)
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ret void
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}
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; Test the largest case for which straight-line code is used.
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define void @f13(ptr %dest, i8 %val) {
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; CHECK-LABEL: f13:
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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: stc %r3, 256(%r2)
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; CHECK: mvc 257(255,%r2), 256(%r2)
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; CHECK: stc %r3, 512(%r2)
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; CHECK: mvc 513(255,%r2), 512(%r2)
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; CHECK: stc %r3, 768(%r2)
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; CHECK: mvc 769(255,%r2), 768(%r2)
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; CHECK: stc %r3, 1024(%r2)
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; CHECK: mvc 1025(255,%r2), 1024(%r2)
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; CHECK: stc %r3, 1280(%r2)
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; CHECK: mvc 1281(255,%r2), 1280(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0.i64(ptr %dest, i8 %val, i64 1536, i1 false)
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ret void
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}
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; Test the next size up, which uses a loop. We leave the other corner
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; cases to memcpy-01.ll and memset-07.ll.
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define void @f14(ptr %dest, i8 %val) {
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; CHECK-LABEL: f14:
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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: br %r14
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call void @llvm.memset.p0.i64(ptr %dest, i8 %val, i64 1537, i1 false)
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ret void
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}
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; Test (no) folding of displacement: Begins with max(uint12) - 1.
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define void @f15(ptr %dest, i8 %val) {
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; CHECK-LABEL: f15:
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; CHECK-NOT: la {{.*}}%r2
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%addr = getelementptr i8, ptr %dest, i64 4094
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call void @llvm.memset.p0.i64(ptr %addr, i8 %val, i64 256, i1 false)
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ret void
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}
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; Test folding of displacement: Begins with max(uint12).
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define void @f16(ptr %dest, i8 %val) {
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; CHECK-LABEL: f16:
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; CHECK-DAG: lay %r1, 4096(%r2)
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; CHECK-DAG: stc %r3, 4095(%r2)
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%addr = getelementptr i8, ptr %dest, i64 4095
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call void @llvm.memset.p0.i64(ptr %addr, i8 %val, i64 256, i1 false)
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ret void
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}
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; Test folding of displacement with LA: First two ops are in range.
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define void @f17(ptr %dest, i8 %val) {
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; CHECK-LABEL: f17:
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; CHECK: stc %r3, 3583(%r2)
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; CHECK-NEXT: mvc 3584(255,%r2), 3583(%r2)
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; CHECK-NEXT: stc %r3, 3839(%r2)
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; CHECK-NEXT: mvc 3840(255,%r2), 3839(%r2)
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; CHECK-DAG: lay %r1, 4096(%r2)
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; CHECK-DAG: stc %r3, 4095(%r2)
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; CHECK-NEXT: mvc 0(1,%r1), 4095(%r2)
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; CHECK-NEXT: br %r14
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%addr = getelementptr i8, ptr %dest, i64 3583
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call void @llvm.memset.p0.i64(ptr %addr, i8 %val, i64 514, i1 false)
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ret void
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}
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; Test folding of displacement with LAY: First two ops are in range.
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define void @f18(ptr %dest, i8 %val) {
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; CHECK-LABEL: f18:
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; CHECK: stc %r3, 3584(%r2)
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; CHECK-NEXT: mvc 3585(255,%r2), 3584(%r2)
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; CHECK-NEXT: stc %r3, 3840(%r2)
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; CHECK-NEXT: mvc 3841(255,%r2), 3840(%r2)
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; CHECK-NEXT: lay %r1, 4097(%r2)
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; CHECK-NEXT: lay %r2, 4096(%r2)
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; CHECK-NEXT: stc %r3, 0(%r2)
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; CHECK-NEXT: mvc 0(1,%r1), 0(%r2)
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; CHECK-NEXT: br %r14
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%addr = getelementptr i8, ptr %dest, i64 3584
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call void @llvm.memset.p0.i64(ptr %addr, i8 %val, i64 514, i1 false)
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ret void
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}
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