| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; Test lib call simplification of __memmove_chk calls with various values |
| ; for dstlen and len. |
| ; |
| ; RUN: opt < %s -passes=instcombine -S | FileCheck %s |
| |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" |
| |
| %struct.T1 = type { [100 x i32], [100 x i32], [1024 x i8] } |
| %struct.T2 = type { [100 x i32], [100 x i32], [1024 x i8] } |
| %struct.T3 = type { [100 x i32], [100 x i32], [2048 x i8] } |
| |
| @t1 = common global %struct.T1 zeroinitializer |
| @t2 = common global %struct.T2 zeroinitializer |
| @t3 = common global %struct.T3 zeroinitializer |
| |
| ; Check cases where dstlen >= len. |
| |
| define ptr @test_simplify1() { |
| ; CHECK-LABEL: @test_simplify1( |
| ; CHECK-NEXT: call void @llvm.memmove.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(1824) @t1, ptr noundef nonnull align 4 dereferenceable(1824) @t2, i64 1824, i1 false) |
| ; CHECK-NEXT: ret ptr @t1 |
| ; |
| |
| %ret = call ptr @__memmove_chk(ptr @t1, ptr @t2, i64 1824, i64 1824) |
| ret ptr %ret |
| } |
| |
| define ptr @test_simplify2() { |
| ; CHECK-LABEL: @test_simplify2( |
| ; CHECK-NEXT: call void @llvm.memmove.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(1824) @t1, ptr noundef nonnull align 4 dereferenceable(1824) @t3, i64 1824, i1 false) |
| ; CHECK-NEXT: ret ptr @t1 |
| ; |
| |
| %ret = call ptr @__memmove_chk(ptr @t1, ptr @t3, i64 1824, i64 2848) |
| ret ptr %ret |
| } |
| |
| define ptr @test_simplify3() { |
| ; CHECK-LABEL: @test_simplify3( |
| ; CHECK-NEXT: tail call void @llvm.memmove.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(1824) @t1, ptr noundef nonnull align 4 dereferenceable(1824) @t2, i64 1824, i1 false) |
| ; CHECK-NEXT: ret ptr @t1 |
| ; |
| |
| %ret = tail call ptr @__memmove_chk(ptr @t1, ptr @t2, i64 1824, i64 1824) |
| ret ptr %ret |
| } |
| |
| ; Check cases where dstlen < len. |
| |
| define ptr @test_no_simplify1() { |
| ; CHECK-LABEL: @test_no_simplify1( |
| ; CHECK-NEXT: [[RET:%.*]] = call ptr @__memmove_chk(ptr nonnull @t3, ptr nonnull @t1, i64 2848, i64 1824) |
| ; CHECK-NEXT: ret ptr [[RET]] |
| ; |
| |
| %ret = call ptr @__memmove_chk(ptr @t3, ptr @t1, i64 2848, i64 1824) |
| ret ptr %ret |
| } |
| |
| define ptr @test_no_simplify2() { |
| ; CHECK-LABEL: @test_no_simplify2( |
| ; CHECK-NEXT: [[RET:%.*]] = call ptr @__memmove_chk(ptr nonnull @t1, ptr nonnull @t2, i64 1024, i64 0) |
| ; CHECK-NEXT: ret ptr [[RET]] |
| ; |
| |
| %ret = call ptr @__memmove_chk(ptr @t1, ptr @t2, i64 1024, i64 0) |
| ret ptr %ret |
| } |
| |
| define ptr @test_no_simplify3(ptr %dst, ptr %src, i64 %a, i64 %b) { |
| ; CHECK-LABEL: @test_no_simplify3( |
| ; CHECK-NEXT: [[RET:%.*]] = musttail call ptr @__memmove_chk(ptr [[DST:%.*]], ptr [[SRC:%.*]], i64 1824, i64 1824) |
| ; CHECK-NEXT: ret ptr [[RET]] |
| ; |
| %ret = musttail call ptr @__memmove_chk(ptr %dst, ptr %src, i64 1824, i64 1824) |
| ret ptr %ret |
| } |
| |
| define ptr @test_no_incompatible_attr(ptr %mem, i32 %val, i32 %size) { |
| ; CHECK-LABEL: @test_no_incompatible_attr( |
| ; CHECK-NEXT: call void @llvm.memmove.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(1824) @t1, ptr noundef nonnull align 4 dereferenceable(1824) @t2, i64 1824, i1 false) |
| ; CHECK-NEXT: ret ptr @t1 |
| ; |
| |
| %ret = call dereferenceable(1) ptr @__memmove_chk(ptr @t1, ptr @t2, i64 1824, i64 1824) |
| ret ptr %ret |
| } |
| |
| declare ptr @__memmove_chk(ptr, ptr, i64, i64) |
