1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; Test lib call simplification of __memmove_chk calls with various values 3; for dstlen and len. 4; 5; RUN: opt < %s -passes=instcombine -S | FileCheck %s 6 7target 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" 8 9%struct.T1 = type { [100 x i32], [100 x i32], [1024 x i8] } 10%struct.T2 = type { [100 x i32], [100 x i32], [1024 x i8] } 11%struct.T3 = type { [100 x i32], [100 x i32], [2048 x i8] } 12 13@t1 = common global %struct.T1 zeroinitializer 14@t2 = common global %struct.T2 zeroinitializer 15@t3 = common global %struct.T3 zeroinitializer 16 17; Check cases where dstlen >= len. 18 19define ptr @test_simplify1() { 20; CHECK-LABEL: @test_simplify1( 21; 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) 22; CHECK-NEXT: ret ptr @t1 23; 24 25 %ret = call ptr @__memmove_chk(ptr @t1, ptr @t2, i64 1824, i64 1824) 26 ret ptr %ret 27} 28 29define ptr @test_simplify2() { 30; CHECK-LABEL: @test_simplify2( 31; 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) 32; CHECK-NEXT: ret ptr @t1 33; 34 35 %ret = call ptr @__memmove_chk(ptr @t1, ptr @t3, i64 1824, i64 2848) 36 ret ptr %ret 37} 38 39define ptr @test_simplify3() { 40; CHECK-LABEL: @test_simplify3( 41; 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) 42; CHECK-NEXT: ret ptr @t1 43; 44 45 %ret = tail call ptr @__memmove_chk(ptr @t1, ptr @t2, i64 1824, i64 1824) 46 ret ptr %ret 47} 48 49; Check cases where dstlen < len. 50 51define ptr @test_no_simplify1() { 52; CHECK-LABEL: @test_no_simplify1( 53; CHECK-NEXT: [[RET:%.*]] = call ptr @__memmove_chk(ptr nonnull @t3, ptr nonnull @t1, i64 2848, i64 1824) 54; CHECK-NEXT: ret ptr [[RET]] 55; 56 57 %ret = call ptr @__memmove_chk(ptr @t3, ptr @t1, i64 2848, i64 1824) 58 ret ptr %ret 59} 60 61define ptr @test_no_simplify2() { 62; CHECK-LABEL: @test_no_simplify2( 63; CHECK-NEXT: [[RET:%.*]] = call ptr @__memmove_chk(ptr nonnull @t1, ptr nonnull @t2, i64 1024, i64 0) 64; CHECK-NEXT: ret ptr [[RET]] 65; 66 67 %ret = call ptr @__memmove_chk(ptr @t1, ptr @t2, i64 1024, i64 0) 68 ret ptr %ret 69} 70 71define ptr @test_no_simplify3(ptr %dst, ptr %src, i64 %a, i64 %b) { 72; CHECK-LABEL: @test_no_simplify3( 73; CHECK-NEXT: [[RET:%.*]] = musttail call ptr @__memmove_chk(ptr [[DST:%.*]], ptr [[SRC:%.*]], i64 1824, i64 1824) 74; CHECK-NEXT: ret ptr [[RET]] 75; 76 %ret = musttail call ptr @__memmove_chk(ptr %dst, ptr %src, i64 1824, i64 1824) 77 ret ptr %ret 78} 79 80define ptr @test_no_incompatible_attr(ptr %mem, i32 %val, i32 %size) { 81; CHECK-LABEL: @test_no_incompatible_attr( 82; 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) 83; CHECK-NEXT: ret ptr @t1 84; 85 86 %ret = call dereferenceable(1) ptr @__memmove_chk(ptr @t1, ptr @t2, i64 1824, i64 1824) 87 ret ptr %ret 88} 89 90declare ptr @__memmove_chk(ptr, ptr, i64, i64) 91