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