| ; RUN: opt -sroa -S < %s | FileCheck %s |
| |
| ; This test checks that SROA does not introduce ptrtoint and inttoptr |
| ; casts from and to non-integral pointers. The "ni:4" bit in the |
| ; datalayout states that pointers of address space 4 are to be |
| ; considered "non-integral". |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-ni:4" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define void @f0(i1 %alwaysFalse, i64 %val) { |
| ; CHECK-LABEL: @f0( |
| ; CHECK-NOT: inttoptr |
| ; CHECK-NOT: ptrtoint |
| entry: |
| %loc = alloca i64 |
| store i64 %val, i64* %loc |
| br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken |
| |
| neverTaken: |
| %loc.bc = bitcast i64* %loc to i8 addrspace(4)** |
| %ptr = load i8 addrspace(4)*, i8 addrspace(4)** %loc.bc |
| store i8 5, i8 addrspace(4)* %ptr |
| ret void |
| |
| alwaysTaken: |
| ret void |
| } |
| |
| define i64 @f1(i1 %alwaysFalse, i8 addrspace(4)* %val) { |
| ; CHECK-LABEL: @f1( |
| ; CHECK-NOT: inttoptr |
| ; CHECK-NOT: ptrtoint |
| entry: |
| %loc = alloca i8 addrspace(4)* |
| store i8 addrspace(4)* %val, i8 addrspace(4)** %loc |
| br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken |
| |
| neverTaken: |
| %loc.bc = bitcast i8 addrspace(4)** %loc to i64* |
| %int = load i64, i64* %loc.bc |
| ret i64 %int |
| |
| alwaysTaken: |
| ret i64 42 |
| } |
| |
| define i64 addrspace(4)* @memset(i1 %alwaysFalse) { |
| ; CHECK-LABEL: @memset( |
| ; CHECK-NOT: inttoptr |
| ; CHECK-NOT: ptrtoint |
| entry: |
| %x = alloca i64 addrspace(4)* |
| %cast.0 = bitcast i64 addrspace(4)** %x to i8* |
| call void @llvm.memset.p0i8.i64(i8* align 8 %cast.0, i8 5, i64 16, i1 false) |
| br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken |
| |
| neverTaken: |
| %x.field.ld.0 = load i64 addrspace(4)*, i64 addrspace(4)** %x |
| ret i64 addrspace(4)* %x.field.ld.0 |
| |
| alwaysTaken: |
| ret i64 addrspace(4)* null |
| } |
| |
| ;; TODO: This one demonstrates a missed oppurtunity. The only known bit |
| ;; pattern for a non-integral bit pattern is that null is zero. As such |
| ;; we could do SROA and replace the memset w/a null store. This will |
| ;; usually be gotten by instcombine. |
| define i64 addrspace(4)* @memset_null(i1 %alwaysFalse) { |
| ; CHECK-LABEL: @memset_null( |
| ; CHECK-NOT: inttoptr |
| ; CHECK-NOT: ptrtoint |
| entry: |
| %x = alloca i64 addrspace(4)* |
| %cast.0 = bitcast i64 addrspace(4)** %x to i8* |
| call void @llvm.memset.p0i8.i64(i8* align 8 %cast.0, i8 0, i64 16, i1 false) |
| br i1 %alwaysFalse, label %neverTaken, label %alwaysTaken |
| |
| neverTaken: |
| %x.field.ld.0 = load i64 addrspace(4)*, i64 addrspace(4)** %x |
| ret i64 addrspace(4)* %x.field.ld.0 |
| |
| alwaysTaken: |
| ret i64 addrspace(4)* null |
| } |
| |
| %union.anon = type { i32* } |
| |
| ; CHECK-LABEL: @f2( |
| ; CHECK-NOT: ptr2int |
| ; CHECK-NOT: int2ptr |
| define i8 *@f2(i8 addrspace(4)* %p) { |
| %1 = alloca %union.anon, align 8 |
| %2 = bitcast %union.anon* %1 to i8 addrspace(4)** |
| store i8 addrspace(4)* %p, i8 addrspace(4)** %2, align 8 |
| %3 = bitcast %union.anon* %1 to i8** |
| %4 = load i8*, i8** %3, align 8 |
| ret i8* %4 |
| } |
| |
| declare void @llvm.memset.p0i8.i64(i8*, i8, i64, i1) |