1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; Test lib call simplification of __memcpy_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.memcpy.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 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 1824) 27 ret i8* %ret 28} 29 30define i8* @test_simplify2() { 31; CHECK-LABEL: @test_simplify2( 32; CHECK-NEXT: call void @llvm.memcpy.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) 33; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*) 34; 35 %dst = bitcast %struct.T1* @t1 to i8* 36 %src = bitcast %struct.T3* @t3 to i8* 37 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 2848) 38 ret i8* %ret 39} 40 41; Check cases where dstlen < len. 42 43define i8* @test_no_simplify1() { 44; CHECK-LABEL: @test_no_simplify1( 45; CHECK-NEXT: [[RET:%.*]] = call i8* @__memcpy_chk(i8* bitcast (%struct.T3* @t3 to i8*), i8* bitcast (%struct.T1* @t1 to i8*), i64 2848, i64 1824) 46; CHECK-NEXT: ret i8* [[RET]] 47; 48 %dst = bitcast %struct.T3* @t3 to i8* 49 %src = bitcast %struct.T1* @t1 to i8* 50 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 2848, i64 1824) 51 ret i8* %ret 52} 53 54define i8* @test_no_simplify2() { 55; CHECK-LABEL: @test_no_simplify2( 56; CHECK-NEXT: [[RET:%.*]] = call i8* @__memcpy_chk(i8* bitcast (%struct.T1* @t1 to i8*), i8* bitcast (%struct.T2* @t2 to i8*), i64 1024, i64 0) 57; CHECK-NEXT: ret i8* [[RET]] 58; 59 %dst = bitcast %struct.T1* @t1 to i8* 60 %src = bitcast %struct.T2* @t2 to i8* 61 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1024, i64 0) 62 ret i8* %ret 63} 64 65define i8* @test_simplify_return_indcall(i8* ()* %alloc) { 66; CHECK-LABEL: @test_simplify_return_indcall( 67; CHECK-NEXT: [[DST:%.*]] = call i8* [[ALLOC:%.*]]() 68; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull align 1 dereferenceable(1824) [[DST]], i8* nonnull align 4 dereferenceable(1824) bitcast (%struct.T2* @t2 to i8*), i64 1824, i1 false) 69; CHECK-NEXT: ret i8* [[DST]] 70; 71 %src = bitcast %struct.T2* @t2 to i8* 72 %dst = call i8* %alloc() 73 %ret = call i8* @__memcpy_chk(i8* %dst, i8* %src, i64 1824, i64 1824) 74 ret i8* %ret 75} 76 77declare i8* @__memcpy_chk(i8*, i8*, i64, i64) 78