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llvm-project/llvm/test/CodeGen/SystemZ/memset-05.ll
Kai Nacke a1710eb3cd [SystemZ][NFC] Opaque pointer migration. 
The LIT test cases were migrated with the script provided by
Nikita Popov.

No manual changes were made. Committed without review since
no functional changes, after consultation with uweigand.
2022-10-11 21:09:43 +00:00

251 lines
9.6 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; Test memset 0 with variable length
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
define void @fun0(ptr %Addr, i64 %Len) {
; CHECK-LABEL: fun0:
; CHECK: # %bb.0:
; CHECK-NEXT: aghi %r3, -1
; CHECK-NEXT: cgibe %r3, -1, 0(%r14)
; CHECK-NEXT: .LBB0_1:
; CHECK-NEXT: srlg %r0, %r3, 8
; CHECK-NEXT: cgije %r0, 0, .LBB0_3
; CHECK-NEXT: .LBB0_2: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: xc 0(256,%r2), 0(%r2)
; CHECK-NEXT: la %r2, 256(%r2)
; CHECK-NEXT: brctg %r0, .LBB0_2
; CHECK-NEXT: .LBB0_3:
; CHECK-NEXT: exrl %r3, .Ltmp0
; CHECK-NEXT: br %r14
tail call void @llvm.memset.p0.i64(ptr %Addr, i8 0, i64 %Len, i1 false)
ret void
}
define void @fun1(ptr %Addr, i32 %Len) {
; CHECK-LABEL: fun1:
; CHECK: # %bb.0:
; CHECK-NEXT: llgfr %r1, %r3
; CHECK-NEXT: aghi %r1, -1
; CHECK-NEXT: cgibe %r1, -1, 0(%r14)
; CHECK-NEXT: .LBB1_1:
; CHECK-NEXT: srlg %r0, %r1, 8
; CHECK-NEXT: cgije %r0, 0, .LBB1_3
; CHECK-NEXT: .LBB1_2: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: xc 0(256,%r2), 0(%r2)
; CHECK-NEXT: la %r2, 256(%r2)
; CHECK-NEXT: brctg %r0, .LBB1_2
; CHECK-NEXT: .LBB1_3:
; CHECK-NEXT: exrl %r1, .Ltmp0
; CHECK-NEXT: br %r14
tail call void @llvm.memset.p0.i32(ptr %Addr, i8 0, i32 %Len, i1 false)
ret void
}
; Test that identical target instructions get reused.
define void @fun2(ptr %Addr, i32 %Len) {
; CHECK-LABEL: fun2:
; CHECK: # %bb.0:
; CHECK-NEXT: llgfr %r1, %r3
; CHECK-NEXT: aghi %r1, -1
; CHECK-NEXT: cgije %r1, -1, .LBB2_4
; CHECK-NEXT: # %bb.1:
; CHECK-NEXT: srlg %r0, %r1, 8
; CHECK-NEXT: lgr %r3, %r2
; CHECK-NEXT: cgije %r0, 0, .LBB2_3
; CHECK-NEXT: .LBB2_2: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: xc 0(256,%r3), 0(%r3)
; CHECK-NEXT: la %r3, 256(%r3)
; CHECK-NEXT: brctg %r0, .LBB2_2
; CHECK-NEXT: .LBB2_3:
; CHECK-NEXT: exrl %r1, .Ltmp1
; CHECK-NEXT: .LBB2_4:
; CHECK-NEXT: cgije %r1, -1, .LBB2_8
; CHECK-NEXT: # %bb.5:
; CHECK-NEXT: srlg %r0, %r1, 8
; CHECK-NEXT: lgr %r3, %r2
; CHECK-NEXT: cgije %r0, 0, .LBB2_7
; CHECK-NEXT: .LBB2_6: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: xc 0(256,%r3), 0(%r3)
; CHECK-NEXT: la %r3, 256(%r3)
; CHECK-NEXT: brctg %r0, .LBB2_6
; CHECK-NEXT: .LBB2_7:
; CHECK-NEXT: exrl %r1, .Ltmp1
; CHECK-NEXT: .LBB2_8:
; CHECK-NEXT: cgibe %r1, -1, 0(%r14)
; CHECK-NEXT: .LBB2_9:
; CHECK-NEXT: srlg %r0, %r1, 8
; CHECK-NEXT: cgije %r0, 0, .LBB2_11
; CHECK-NEXT: .LBB2_10: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: xc 0(256,%r2), 0(%r2)
; CHECK-NEXT: la %r2, 256(%r2)
; CHECK-NEXT: brctg %r0, .LBB2_10
; CHECK-NEXT: .LBB2_11:
; CHECK-NEXT: exrl %r1, .Ltmp0
; CHECK-NEXT: br %r14
tail call void @llvm.memset.p0.i32(ptr %Addr, i8 0, i32 %Len, i1 false)
tail call void @llvm.memset.p0.i32(ptr %Addr, i8 0, i32 %Len, i1 false)
tail call void @llvm.memset.p0.i32(ptr %Addr, i8 0, i32 %Len, i1 false)
ret void
}
; Test that a memset to nullptr compiles.
define void @fun3(i64 %Len) {
; CHECK-LABEL: fun3:
; CHECK: # %bb.0:
; CHECK-NEXT: aghi %r2, -1
; CHECK-NEXT: cgibe %r2, -1, 0(%r14)
; CHECK-NEXT: .LBB3_1:
; CHECK-NEXT: srlg %r0, %r2, 8
; CHECK-NEXT: lghi %r1, 0
; CHECK-NEXT: cgije %r0, 0, .LBB3_3
; CHECK-NEXT: .LBB3_2: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: xc 0(256,%r1), 0(%r1)
; CHECK-NEXT: la %r1, 256(%r1)
; CHECK-NEXT: brctg %r0, .LBB3_2
; CHECK-NEXT: .LBB3_3:
; CHECK-NEXT: exrl %r2, .Ltmp2
; CHECK-NEXT: br %r14
call void @llvm.memset.p0.i64(ptr null, i8 0, i64 %Len, i1 false)
ret void
}
; Test that a memset with a length argument that DAGCombiner will convert
; into a constant get the correct number of bytes set.
@Data = external hidden constant [1024 x i8], align 2
define void @fun4() {
; CHECK-LABEL: fun4:
; CHECK: # %bb.0:
; CHECK-NEXT: larl %r1, Data
; CHECK-NEXT: xc 35(256,%r1), 35(%r1)
; CHECK-NEXT: xc 291(256,%r1), 291(%r1)
; CHECK-NEXT: xc 547(256,%r1), 547(%r1)
; CHECK-NEXT: xc 803(221,%r1), 803(%r1)
; CHECK-NEXT: mvghi 0(%r1), 989
; CHECK-NEXT: br %r14
call void @llvm.memset.p0.i64(
ptr getelementptr inbounds ([1024 x i8], ptr @Data, i64 0, i64 35),
i8 0,
i64 sub (i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 0) to i64), i64 1),
i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 0, i64 35) to i64), i64 1)),
i1 false)
%i11 = getelementptr i8, ptr null,
i64 sub (i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 0) to i64), i64 1),
i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 0, i64 35) to i64), i64 1))
store ptr %i11, ptr undef, align 8
ret void
}
; The same, with a resulting constant length of 0.
define void @fun5() {
; CHECK-LABEL: fun5:
; CHECK: # %bb.0:
; CHECK-NEXT: mvghi 0(%r1), 0
; CHECK-NEXT: br %r14
call void @llvm.memset.p0.i64(
ptr getelementptr inbounds ([1024 x i8], ptr @Data, i64 0, i64 35),
i8 0,
i64 sub (i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 35) to i64), i64 1),
i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 35) to i64), i64 1)),
i1 false)
%i11 = getelementptr i8, ptr null,
i64 sub (i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 35) to i64), i64 1),
i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 35) to i64), i64 1))
store ptr %i11, ptr undef, align 8
ret void
}
; The same, with a resulting constant length of 1.
define void @fun6() {
; CHECK-LABEL: fun6:
; CHECK: # %bb.0:
; CHECK-NEXT: larl %r1, Data
; CHECK-NEXT: xc 35(1,%r1), 35(%r1)
; CHECK-NEXT: mvghi 0(%r1), 1
; CHECK-NEXT: br %r14
call void @llvm.memset.p0.i64(
ptr getelementptr inbounds ([1024 x i8], ptr @Data, i64 0, i64 35),
i8 0,
i64 sub (i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 36) to i64), i64 1),
i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 35) to i64), i64 1)),
i1 false)
%i11 = getelementptr i8, ptr null,
i64 sub (i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 36) to i64), i64 1),
i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 35) to i64), i64 1))
store ptr %i11, ptr undef, align 8
ret void
}
; The same, with a resulting constant length of 256.
define void @fun7() {
; CHECK-LABEL: fun7:
; CHECK: # %bb.0:
; CHECK-NEXT: larl %r1, Data
; CHECK-NEXT: xc 35(256,%r1), 35(%r1)
; CHECK-NEXT: mvghi 0(%r1), 256
; CHECK-NEXT: br %r14
call void @llvm.memset.p0.i64(
ptr getelementptr inbounds ([1024 x i8], ptr @Data, i64 0, i64 35),
i8 0,
i64 sub (i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 291) to i64), i64 1),
i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 35) to i64), i64 1)),
i1 false)
%i11 = getelementptr i8, ptr null,
i64 sub (i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 291) to i64), i64 1),
i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 35) to i64), i64 1))
store ptr %i11, ptr undef, align 8
ret void
}
; The same, with a resulting constant length of 257.
define void @fun8() {
; CHECK-LABEL: fun8:
; CHECK: # %bb.0:
; CHECK-NEXT: larl %r1, Data
; CHECK-NEXT: xc 35(256,%r1), 35(%r1)
; CHECK-NEXT: xc 291(1,%r1), 291(%r1)
; CHECK-NEXT: mvghi 0(%r1), 257
; CHECK-NEXT: br %r14
call void @llvm.memset.p0.i64(
ptr getelementptr inbounds ([1024 x i8], ptr @Data, i64 0, i64 35),
i8 0,
i64 sub (i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 292) to i64), i64 1),
i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 35) to i64), i64 1)),
i1 false)
%i11 = getelementptr i8, ptr null,
i64 sub (i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 292) to i64), i64 1),
i64 add (i64 ptrtoint (ptr getelementptr inbounds ([1024 x i8],
ptr @Data, i64 1, i64 35) to i64), i64 1))
store ptr %i11, ptr undef, align 8
ret void
}
; CHECK: .Ltmp2:
; CHECK-NEXT: xc 0(1,%r1), 0(%r1)
; CHECK-NEXT: .Ltmp0:
; CHECK-NEXT: xc 0(1,%r2), 0(%r2)
; CHECK-NEXT: .Ltmp1:
; CHECK-NEXT: xc 0(1,%r3), 0(%r3)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
declare void @llvm.memset.p0.i32(ptr nocapture writeonly, i8, i32, i1 immarg)
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