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
42
|
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -memcpyopt -S -verify-memoryssa | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
; Don't delete the memcpy in %if.then, even though it depends on an instruction
; which will be deleted.
define void @foo(i1 %c, i8* %d, i8* %e, i8* %f) {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP:%.*]] = alloca [50 x i8], align 8
; CHECK-NEXT: [[TMP4:%.*]] = bitcast [50 x i8]* [[TMP]] to i8*
; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i8, i8* [[TMP4]], i64 1
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* nonnull [[D:%.*]], i8 0, i64 10, i1 false)
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 8 [[TMP4]], i8 0, i64 11, i1 false)
; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_THEN:%.*]], label [[EXIT:%.*]]
; CHECK: if.then:
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 8 [[F:%.*]], i8 0, i64 11, i1 false)
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
%tmp = alloca [50 x i8], align 8
%tmp4 = bitcast [50 x i8]* %tmp to i8*
%tmp1 = getelementptr inbounds i8, i8* %tmp4, i64 1
call void @llvm.memset.p0i8.i64(i8* nonnull %d, i8 0, i64 10, i1 false)
store i8 0, i8* %tmp4, align 8
call void @llvm.memcpy.p0i8.p0i8.i64(i8* nonnull %tmp1, i8* nonnull %d, i64 10, i1 false)
br i1 %c, label %if.then, label %exit
if.then:
call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 %f, i8* nonnull align 8 %tmp4, i64 30, i1 false)
br label %exit
exit:
ret void
}
declare void @llvm.memcpy.p0i8.p0i8.i64(i8*, i8*, i64, i1)
declare void @llvm.memset.p0i8.i64(i8*, i8, i64, i1)
|
