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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; Test lib call simplification of __memmove_chk calls with various values3; for dstlen and len.4;5; RUN: opt < %s -passes=instcombine -S | FileCheck %s6 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 zeroinitializer14@t2 = common global %struct.T2 zeroinitializer15@t3 = common global %struct.T3 zeroinitializer16 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 @t123;24 25 %ret = call ptr @__memmove_chk(ptr @t1, ptr @t2, i64 1824, i64 1824)26 ret ptr %ret27}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 @t133;34 35 %ret = call ptr @__memmove_chk(ptr @t1, ptr @t3, i64 1824, i64 2848)36 ret ptr %ret37}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 @t143;44 45 %ret = tail call ptr @__memmove_chk(ptr @t1, ptr @t2, i64 1824, i64 1824)46 ret ptr %ret47}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 %ret59}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 %ret69}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 %ret78}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 @t184;85 86 %ret = call dereferenceable(1) ptr @__memmove_chk(ptr @t1, ptr @t2, i64 1824, i64 1824)87 ret ptr %ret88}89 90declare ptr @__memmove_chk(ptr, ptr, i64, i64)91