| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; Test lib call simplification of __memmove_chk calls with various values |
| ; for dstlen and len. |
| ; |
| ; RUN: opt < %s -instcombine -S | FileCheck %s |
| |
| 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" |
| |
| %struct.T1 = type { [100 x i32], [100 x i32], [1024 x i8] } |
| %struct.T2 = type { [100 x i32], [100 x i32], [1024 x i8] } |
| %struct.T3 = type { [100 x i32], [100 x i32], [2048 x i8] } |
| |
| @t1 = common global %struct.T1 zeroinitializer |
| @t2 = common global %struct.T2 zeroinitializer |
| @t3 = common global %struct.T3 zeroinitializer |
| |
| ; Check cases where dstlen >= len. |
| |
| define i8* @test_simplify1() { |
| ; CHECK-LABEL: @test_simplify1( |
| ; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64(i8* noundef nonnull align 4 dereferenceable(1824) bitcast (%struct.T1* @t1 to i8*), i8* noundef nonnull align 4 dereferenceable(1824) bitcast (%struct.T2* @t2 to i8*), i64 1824, i1 false) |
| ; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*) |
| ; |
| %dst = bitcast %struct.T1* @t1 to i8* |
| %src = bitcast %struct.T2* @t2 to i8* |
| |
| %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824, i64 1824) |
| ret i8* %ret |
| } |
| |
| define i8* @test_simplify2() { |
| ; CHECK-LABEL: @test_simplify2( |
| ; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64(i8* noundef nonnull align 4 dereferenceable(1824) bitcast (%struct.T1* @t1 to i8*), i8* noundef nonnull align 4 dereferenceable(1824) bitcast (%struct.T3* @t3 to i8*), i64 1824, i1 false) |
| ; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*) |
| ; |
| %dst = bitcast %struct.T1* @t1 to i8* |
| %src = bitcast %struct.T3* @t3 to i8* |
| |
| %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824, i64 2848) |
| ret i8* %ret |
| } |
| |
| ; Check cases where dstlen < len. |
| |
| define i8* @test_no_simplify1() { |
| ; CHECK-LABEL: @test_no_simplify1( |
| ; 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) |
| ; CHECK-NEXT: ret i8* [[RET]] |
| ; |
| %dst = bitcast %struct.T3* @t3 to i8* |
| %src = bitcast %struct.T1* @t1 to i8* |
| |
| %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 2848, i64 1824) |
| ret i8* %ret |
| } |
| |
| define i8* @test_no_simplify2() { |
| ; CHECK-LABEL: @test_no_simplify2( |
| ; 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) |
| ; CHECK-NEXT: ret i8* [[RET]] |
| ; |
| %dst = bitcast %struct.T1* @t1 to i8* |
| %src = bitcast %struct.T2* @t2 to i8* |
| |
| %ret = call i8* @__memmove_chk(i8* %dst, i8* %src, i64 1024, i64 0) |
| ret i8* %ret |
| } |
| |
| define i8* @test_no_incompatible_attr(i8* %mem, i32 %val, i32 %size) { |
| ; CHECK-LABEL: @test_no_incompatible_attr( |
| ; CHECK-NEXT: call void @llvm.memmove.p0i8.p0i8.i64(i8* noundef nonnull align 4 dereferenceable(1824) bitcast (%struct.T1* @t1 to i8*), i8* noundef nonnull align 4 dereferenceable(1824) bitcast (%struct.T2* @t2 to i8*), i64 1824, i1 false) |
| ; CHECK-NEXT: ret i8* bitcast (%struct.T1* @t1 to i8*) |
| ; |
| %dst = bitcast %struct.T1* @t1 to i8* |
| %src = bitcast %struct.T2* @t2 to i8* |
| |
| %ret = call dereferenceable(1) i8* @__memmove_chk(i8* %dst, i8* %src, i64 1824, i64 1824) |
| ret i8* %ret |
| } |
| |
| declare i8* @__memmove_chk(i8*, i8*, i64, i64) |