| ; RUN: llc -mtriple=aarch64 -mcpu=cortex-a53 < %s | FileCheck %s |
| |
| ; Tests to check that zero stores which are generated as STP xzr, xzr aren't |
| ; scheduled incorrectly due to incorrect alias information |
| |
| declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) |
| %struct.tree_common = type { ptr, ptr, i32 } |
| |
| ; Original test case which exhibited the bug |
| define void @test1(ptr %t, i32 %code, ptr %type) { |
| ; CHECK-LABEL: test1: |
| ; CHECK-DAG: stp x2, xzr, [x0, #8] |
| ; CHECK-DAG: str w1, [x0, #16] |
| ; CHECK-DAG: str xzr, [x0] |
| entry: |
| tail call void @llvm.memset.p0.i64(ptr align 8 %t, i8 0, i64 24, i1 false) |
| %code1 = getelementptr inbounds %struct.tree_common, ptr %t, i64 0, i32 2 |
| store i32 %code, ptr %code1, align 8 |
| %type2 = getelementptr inbounds %struct.tree_common, ptr %t, i64 0, i32 1 |
| store ptr %type, ptr %type2, align 8 |
| ret void |
| } |
| |
| ; Store to each struct element instead of using memset |
| define void @test2(ptr %t, i32 %code, ptr %type) { |
| ; CHECK-LABEL: test2: |
| ; CHECK-DAG: str w1, [x0, #16] |
| ; CHECK-DAG: stp xzr, x2, [x0] |
| entry: |
| %0 = getelementptr inbounds %struct.tree_common, ptr %t, i64 0, i32 1 |
| %1 = getelementptr inbounds %struct.tree_common, ptr %t, i64 0, i32 2 |
| store ptr zeroinitializer, ptr %t, align 8 |
| store ptr zeroinitializer, ptr %0, align 8 |
| store i32 zeroinitializer, ptr %1, align 8 |
| store i32 %code, ptr %1, align 8 |
| store ptr %type, ptr %0, align 8 |
| ret void |
| } |
| |
| ; Vector store instead of memset |
| define void @test3(ptr %t, i32 %code, ptr %type) { |
| ; CHECK-LABEL: test3: |
| ; CHECK-DAG: stp x2, xzr, [x0, #8] |
| ; CHECK-DAG: str w1, [x0, #16] |
| ; CHECK-DAG: str xzr, [x0] |
| entry: |
| store <3 x i64> zeroinitializer, ptr %t, align 8 |
| %code1 = getelementptr inbounds %struct.tree_common, ptr %t, i64 0, i32 2 |
| store i32 %code, ptr %code1, align 8 |
| %type2 = getelementptr inbounds %struct.tree_common, ptr %t, i64 0, i32 1 |
| store ptr %type, ptr %type2, align 8 |
| ret void |
| } |
| |
| ; Vector store, then store to vector elements |
| define void @test4(ptr %p, i64 %x, i64 %y) { |
| ; CHECK-LABEL: test4: |
| ; CHECK-DAG: stp x2, x1, [x0, #8] |
| ; CHECK-DAG: str xzr, [x0] |
| entry: |
| store <3 x i64> zeroinitializer, ptr %p, align 8 |
| %0 = getelementptr inbounds i64, ptr %p, i64 2 |
| store i64 %x, ptr %0, align 8 |
| %1 = getelementptr inbounds i64, ptr %p, i64 1 |
| store i64 %y, ptr %1, align 8 |
| ret void |
| } |