1 ; Test lib call simplification of __memmove_chk calls with various values 2 ; for dstlen and len. 3 ; 4 ; RUN: opt < %s -instcombine -S | FileCheck %s 5 6 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" 7 8 %struct.T1 = type { [100 x i32], [100 x i32], [1024 x i8] } 9 %struct.T2 = type { [100 x i32], [100 x i32], [1024 x i8] } 10 %struct.T3 = type { [100 x i32], [100 x i32], [2048 x i8] } 11 12 @t1 = common global %struct.T1 zeroinitializer 13 @t2 = common global %struct.T2 zeroinitializer 14 @t3 = common global %struct.T3 zeroinitializer 15 16 ; Check cases where dstlen >= len. 17 18 define void @test_simplify1() { 19 ; CHECK-LABEL: @test_simplify1( 20 %dst = bitcast %struct.T1* @t1 to i8* 21 %src = bitcast %struct.T2* @t2 to i8* 22 23 ; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64 24 call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824, i64 1824) 25 ret void 26 } 27 28 define void @test_simplify2() { 29 ; CHECK-LABEL: @test_simplify2( 30 %dst = bitcast %struct.T1* @t1 to i8* 31 %src = bitcast %struct.T3* @t3 to i8* 32 33 ; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64 34 call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824, i64 2848) 35 ret void 36 } 37 38 ; Check cases where dstlen < len. 39 40 define void @test_no_simplify1() { 41 ; CHECK-LABEL: @test_no_simplify1( 42 %dst = bitcast %struct.T3* @t3 to i8* 43 %src = bitcast %struct.T1* @t1 to i8* 44 45 ; CHECK-NEXT: call i8* @__memmove_chk 46 call i8* @__memmove_chk(i8* %dst, i8* %src, i64 2848, i64 1824) 47 ret void 48 } 49 50 define void @test_no_simplify2() { 51 ; CHECK-LABEL: @test_no_simplify2( 52 %dst = bitcast %struct.T1* @t1 to i8* 53 %src = bitcast %struct.T2* @t2 to i8* 54 55 ; CHECK-NEXT: call i8* @__memmove_chk 56 call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1024, i64 0) 57 ret void 58 } 59 60 declare i8* @__memmove_chk(i8*, i8*, i64, i64) 61
