| ; RUN: opt < %s -basicaa -dse -S | FileCheck %s |
| |
| define void @write4to7(i32* nocapture %p) { |
| ; CHECK-LABEL: @write4to7( |
| entry: |
| %arrayidx0 = getelementptr inbounds i32, i32* %p, i64 1 |
| %p3 = bitcast i32* %arrayidx0 to i8* |
| ; CHECK: [[GEP:%[0-9]+]] = getelementptr inbounds i8, i8* %p3, i64 4 |
| ; CHECK: call void @llvm.memset.p0i8.i64(i8* [[GEP]], i8 0, i64 24, i32 4, i1 false) |
| call void @llvm.memset.p0i8.i64(i8* %p3, i8 0, i64 28, i32 4, i1 false) |
| %arrayidx1 = getelementptr inbounds i32, i32* %p, i64 1 |
| store i32 1, i32* %arrayidx1, align 4 |
| ret void |
| } |
| |
| define void @write0to3(i32* nocapture %p) { |
| ; CHECK-LABEL: @write0to3( |
| entry: |
| %p3 = bitcast i32* %p to i8* |
| ; CHECK: [[GEP:%[0-9]+]] = getelementptr inbounds i8, i8* %p3, i64 4 |
| ; CHECK: call void @llvm.memset.p0i8.i64(i8* [[GEP]], i8 0, i64 24, i32 4, i1 false) |
| call void @llvm.memset.p0i8.i64(i8* %p3, i8 0, i64 28, i32 4, i1 false) |
| store i32 1, i32* %p, align 4 |
| ret void |
| } |
| |
| define void @write0to7(i32* nocapture %p) { |
| ; CHECK-LABEL: @write0to7( |
| entry: |
| %p3 = bitcast i32* %p to i8* |
| ; CHECK: [[GEP:%[0-9]+]] = getelementptr inbounds i8, i8* %p3, i64 8 |
| ; CHECK: call void @llvm.memset.p0i8.i64(i8* [[GEP]], i8 0, i64 24, i32 4, i1 false) |
| call void @llvm.memset.p0i8.i64(i8* %p3, i8 0, i64 32, i32 4, i1 false) |
| %p4 = bitcast i32* %p to i64* |
| store i64 1, i64* %p4, align 8 |
| ret void |
| } |
| |
| define void @write0to7_2(i32* nocapture %p) { |
| ; CHECK-LABEL: @write0to7_2( |
| entry: |
| %arrayidx0 = getelementptr inbounds i32, i32* %p, i64 1 |
| %p3 = bitcast i32* %arrayidx0 to i8* |
| ; CHECK: [[GEP:%[0-9]+]] = getelementptr inbounds i8, i8* %p3, i64 4 |
| ; CHECK: call void @llvm.memset.p0i8.i64(i8* [[GEP]], i8 0, i64 24, i32 4, i1 false) |
| call void @llvm.memset.p0i8.i64(i8* %p3, i8 0, i64 28, i32 4, i1 false) |
| %p4 = bitcast i32* %p to i64* |
| store i64 1, i64* %p4, align 8 |
| ret void |
| } |
| |
| ; We do not trim the beginning of the eariler write if the alignment of the |
| ; start pointer is changed. |
| define void @dontwrite0to3_align8(i32* nocapture %p) { |
| ; CHECK-LABEL: @dontwrite0to3_align8( |
| entry: |
| %p3 = bitcast i32* %p to i8* |
| ; CHECK: call void @llvm.memset.p0i8.i64(i8* %p3, i8 0, i64 32, i32 8, i1 false) |
| call void @llvm.memset.p0i8.i64(i8* %p3, i8 0, i64 32, i32 8, i1 false) |
| store i32 1, i32* %p, align 4 |
| ret void |
| } |
| |
| define void @dontwrite0to1(i32* nocapture %p) { |
| ; CHECK-LABEL: @dontwrite0to1( |
| entry: |
| %p3 = bitcast i32* %p to i8* |
| ; CHECK: call void @llvm.memset.p0i8.i64(i8* %p3, i8 0, i64 32, i32 4, i1 false) |
| call void @llvm.memset.p0i8.i64(i8* %p3, i8 0, i64 32, i32 4, i1 false) |
| %p4 = bitcast i32* %p to i16* |
| store i16 1, i16* %p4, align 4 |
| ret void |
| } |
| |
| define void @dontwrite2to9(i32* nocapture %p) { |
| ; CHECK-LABEL: @dontwrite2to9( |
| entry: |
| %arrayidx0 = getelementptr inbounds i32, i32* %p, i64 1 |
| %p3 = bitcast i32* %arrayidx0 to i8* |
| ; CHECK: call void @llvm.memset.p0i8.i64(i8* %p3, i8 0, i64 32, i32 4, i1 false) |
| call void @llvm.memset.p0i8.i64(i8* %p3, i8 0, i64 32, i32 4, i1 false) |
| %p4 = bitcast i32* %p to i16* |
| %arrayidx2 = getelementptr inbounds i16, i16* %p4, i64 1 |
| %p5 = bitcast i16* %arrayidx2 to i64* |
| store i64 1, i64* %p5, align 8 |
| ret void |
| } |
| |
| define void @write8To15AndThen0To7(i64* nocapture %P) { |
| entry: |
| ; CHECK-LABEL: @write8To15AndThen0To7( |
| ; CHECK: [[GEP:%[0-9]+]] = getelementptr inbounds i8, i8* %mybase0, i64 16 |
| ; CHECK: tail call void @llvm.memset.p0i8.i64(i8* [[GEP]], i8 0, i64 16, i32 8, i1 false) |
| |
| %base0 = bitcast i64* %P to i8* |
| %mybase0 = getelementptr inbounds i8, i8* %base0, i64 0 |
| tail call void @llvm.memset.p0i8.i64(i8* %mybase0, i8 0, i64 32, i32 8, i1 false) |
| |
| %base64_0 = getelementptr inbounds i64, i64* %P, i64 0 |
| %base64_1 = getelementptr inbounds i64, i64* %P, i64 1 |
| |
| store i64 1, i64* %base64_1 |
| store i64 2, i64* %base64_0 |
| ret void |
| } |
| |
| declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind |
| |