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 -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 i8* @test_simplify1() { 20; CHECK-LABEL: @test_simplify1( 21; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64(i8* nonnull align 4 dereferenceable(1824) bitcast (%struct.T1* @t1 to i8*), i8* nonnull align 4 dereferenceable(1824) bitcast (%struct.T2* @t2 to i8*), i64 1824, i1 false) 22; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*) 23; 24 %dst = bitcast %struct.T1* @t1 to i8* 25 %src = bitcast %struct.T2* @t2 to i8* 26 27 %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824, i64 1824) 28 ret i8* %ret 29} 30 31define i8* @test_simplify2() { 32; CHECK-LABEL: @test_simplify2( 33; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64(i8* nonnull align 4 dereferenceable(1824) bitcast (%struct.T1* @t1 to i8*), i8* nonnull align 4 dereferenceable(1824) bitcast (%struct.T3* @t3 to i8*), i64 1824, i1 false) 34; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*) 35; 36 %dst = bitcast %struct.T1* @t1 to i8* 37 %src = bitcast %struct.T3* @t3 to i8* 38 39 %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824, i64 2848) 40 ret i8* %ret 41} 42 43; Check cases where dstlen < len. 44 45define i8* @test_no_simplify1() { 46; CHECK-LABEL: @test_no_simplify1( 47; CHECK-NEXT: [[RET:%.*]] = call i8* @__memmove_chk(i8* bitcast (%struct.T3* @t3 to i8*), i8* bitcast (%struct.T1* @t1 to i8*), i64 2848, i64 1824) 48; CHECK-NEXT: ret i8* [[RET]] 49; 50 %dst = bitcast %struct.T3* @t3 to i8* 51 %src = bitcast %struct.T1* @t1 to i8* 52 53 %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 2848, i64 1824) 54 ret i8* %ret 55} 56 57define i8* @test_no_simplify2() { 58; CHECK-LABEL: @test_no_simplify2( 59; CHECK-NEXT: [[RET:%.*]] = call i8* @__memmove_chk(i8* bitcast (%struct.T1* @t1 to i8*), i8* bitcast (%struct.T2* @t2 to i8*), i64 1024, i64 0) 60; CHECK-NEXT: ret i8* [[RET]] 61; 62 %dst = bitcast %struct.T1* @t1 to i8* 63 %src = bitcast %struct.T2* @t2 to i8* 64 65 %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1024, i64 0) 66 ret i8* %ret 67} 68 69declare i8* @__memmove_chk(i8*, i8*, i64, i64) 70