1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
; Test that the memmove library call simplifier works correctly.
;
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
declare ptr @memmove(ptr, ptr, i32)
; Check memmove(mem1, mem2, size) -> llvm.memmove(mem1, mem2, size, 1).
define ptr @test_simplify1(ptr %mem1, ptr %mem2, i32 %size) {
; CHECK-LABEL: @test_simplify1(
%ret = call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)
; CHECK: call void @llvm.memmove
ret ptr %ret
; CHECK: ret ptr %mem1
}
define ptr @test_simplify2(ptr %mem1, ptr %mem2, i32 %size) {
; CHECK-LABEL: @test_simplify2(
; CHECK-NEXT: tail call void @llvm.memmove
; CHECK-NEXT: ret ptr %mem1
%ret = tail call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)
ret ptr %ret
}
define ptr @test_no_simplify1(ptr %mem1, ptr %mem2, i32 %size) {
; CHECK-LABEL: @test_no_simplify1(
; CHECK-NEXT: %ret = musttail call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)
; CHECK-NEXT: ret ptr %ret
%ret = musttail call ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)
ret ptr %ret
}
define ptr @test_no_incompatible_attr(ptr %mem1, ptr %mem2, i32 %size) {
; CHECK-LABEL: @test_no_incompatible_attr(
%ret = call dereferenceable(1) ptr @memmove(ptr %mem1, ptr %mem2, i32 %size)
; CHECK: call void @llvm.memmove
ret ptr %ret
; CHECK: ret ptr %mem1
}
|
