diff options
Diffstat (limited to 'test/Transforms/InstCombine/element-atomic-memintrins.ll')
| -rw-r--r-- | test/Transforms/InstCombine/element-atomic-memintrins.ll | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/element-atomic-memintrins.ll b/test/Transforms/InstCombine/element-atomic-memintrins.ll new file mode 100644 index 0000000000000..2e3bfd7b721d6 --- /dev/null +++ b/test/Transforms/InstCombine/element-atomic-memintrins.ll @@ -0,0 +1,98 @@ +;; Placeholder tests that will fail once element atomic @llvm.mem[move|set] instrinsics have +;; been added to the MemIntrinsic class hierarchy. These will act as a reminder to +;; verify that inst combine handles these intrinsics properly once they have been +;; added to that class hierarchy. + +; RUN: opt -instcombine -S < %s | FileCheck %s + +;; ---- memset ----- + +; Ensure 0-length memset isn't removed +define void @test_memset_zero_length(i8* %dest) { + ; CHECK-LABEL: test_memset_zero_length + ; CHECK-NEXT: call void @llvm.memset.element.unordered.atomic.p0i8.i32(i8* align 1 %dest, i8 1, i32 0, i32 1) + ; CHECK-NEXT: ret void + call void @llvm.memset.element.unordered.atomic.p0i8.i32(i8* align 1 %dest, i8 1, i32 0, i32 1) + ret void +} + +; Ensure that small-sized memsets don't convert to stores +define void @test_memset_to_store(i8* %dest) { + ; CHECK-LABEL: test_memset_to_store + ; CHECK-NEXT: call void @llvm.memset.element.unordered.atomic.p0i8.i32(i8* align 1 %dest, i8 1, i32 1, i32 1) + ; CHECK-NEXT: call void @llvm.memset.element.unordered.atomic.p0i8.i32(i8* align 1 %dest, i8 1, i32 2, i32 1) + ; CHECK-NEXT: call void @llvm.memset.element.unordered.atomic.p0i8.i32(i8* align 1 %dest, i8 1, i32 4, i32 1) + ; CHECK-NEXT: call void @llvm.memset.element.unordered.atomic.p0i8.i32(i8* align 1 %dest, i8 1, i32 8, i32 1) + ; CHECK-NEXT: ret void + call void @llvm.memset.element.unordered.atomic.p0i8.i32(i8* align 1 %dest, i8 1, i32 1, i32 1) + call void @llvm.memset.element.unordered.atomic.p0i8.i32(i8* align 1 %dest, i8 1, i32 2, i32 1) + call void @llvm.memset.element.unordered.atomic.p0i8.i32(i8* align 1 %dest, i8 1, i32 4, i32 1) + call void @llvm.memset.element.unordered.atomic.p0i8.i32(i8* align 1 %dest, i8 1, i32 8, i32 1) + ret void +} + +declare void @llvm.memset.element.unordered.atomic.p0i8.i32(i8* nocapture writeonly, i8, i32, i32) nounwind argmemonly + + +;; ========================================= +;; ----- memmove ------ + +; memmove from a global constant source does not become memcpy +@gconst = constant [8 x i8] c"0123456\00" +define void @test_memmove_to_memcpy(i8* %dest) { + ; CHECK-LABEL: test_memmove_to_memcpy + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 getelementptr inbounds ([8 x i8], [8 x i8]* @gconst, i64 0, i64 0), i32 8, i32 1) + ; CHECK-NEXT: ret void + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 getelementptr inbounds ([8 x i8], [8 x i8]* @gconst, i64 0, i64 0), i32 8, i32 1) + ret void +} + +define void @test_memmove_zero_length(i8* %dest, i8* %src) { + ; CHECK-LABEL: test_memmove_zero_length + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 %src, i32 0, i32 1) + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 2 %dest, i8* align 2 %src, i32 0, i32 2) + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 4 %dest, i8* align 4 %src, i32 0, i32 4) + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 8 %dest, i8* align 8 %src, i32 0, i32 8) + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 16 %dest, i8* align 16 %src, i32 0, i32 16) + ; CHECK-NEXT: ret void + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 %src, i32 0, i32 1) + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 2 %dest, i8* align 2 %src, i32 0, i32 2) + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 4 %dest, i8* align 4 %src, i32 0, i32 4) + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 8 %dest, i8* align 8 %src, i32 0, i32 8) + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 16 %dest, i8* align 16 %src, i32 0, i32 16) + ret void +} + +; memmove with src==dest is removed +define void @test_memmove_removed(i8* %srcdest, i32 %sz) { + ; CHECK-LABEL: test_memmove_removed + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %srcdest, i8* align 1 %srcdest, i32 %sz, i32 1) + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 2 %srcdest, i8* align 2 %srcdest, i32 %sz, i32 2) + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 4 %srcdest, i8* align 4 %srcdest, i32 %sz, i32 4) + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 8 %srcdest, i8* align 8 %srcdest, i32 %sz, i32 8) + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 16 %srcdest, i8* align 16 %srcdest, i32 %sz, i32 16) + ; CHECK-NEXT: ret void + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %srcdest, i8* align 1 %srcdest, i32 %sz, i32 1) + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 2 %srcdest, i8* align 2 %srcdest, i32 %sz, i32 2) + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 4 %srcdest, i8* align 4 %srcdest, i32 %sz, i32 4) + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 8 %srcdest, i8* align 8 %srcdest, i32 %sz, i32 8) + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 16 %srcdest, i8* align 16 %srcdest, i32 %sz, i32 16) + ret void +} + +; memmove with a small constant length is converted to a load/store pair +define void @test_memmove_loadstore(i8* %dest, i8* %src) { + ; CHECK-LABEL: test_memmove_loadstore + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 %src, i32 1, i32 1) + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 %src, i32 2, i32 1) + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 %src, i32 4, i32 1) + ; CHECK-NEXT: call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 %src, i32 8, i32 1) + ; CHECK-NEXT: ret void + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 %src, i32 1, i32 1) + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 %src, i32 2, i32 1) + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 %src, i32 4, i32 1) + call void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* align 1 %dest, i8* align 1 %src, i32 8, i32 1) + ret void +} + +declare void @llvm.memmove.element.unordered.atomic.p0i8.p0i8.i32(i8* nocapture writeonly, i8* nocapture readonly, i32, i32) nounwind argmemonly |