1 ; RUN: llc -o - -mtriple=i386-unknown-linux-gnu < %s | FileCheck %s
2 ; RUN: llc -o - -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
4 @a = common global i32 0, align 4
5 @b = common global i32 0, align 4
6 @c = common global i32 0, align 4
7 @e = common global i32 0, align 4
8 @x = common global i32 0, align 4
9 @f = common global i32 0, align 4
10 @h = common global i32 0, align 4
11 @i = common global i32 0, align 4
13 ; Test -Os to make sure immediates with multiple users don't get pulled in to
15 define i32 @foo() optsize {
17 ; CHECK: movl $1234, [[R1:%[a-z]+]]
18 ; CHECK-NOT: movl $1234, a
19 ; CHECK-NOT: movl $1234, b
20 ; CHECK-NOT: movl $12, c
21 ; CHECK-NOT: cmpl $12, e
22 ; CHECK: movl [[R1]], a
23 ; CHECK: movl [[R1]], b
26 store i32 1234, i32* @a
27 store i32 1234, i32* @b
29 %0 = load i32, i32* @e
30 %cmp = icmp eq i32 %0, 12
31 br i1 %cmp, label %if.then, label %if.end
33 if.then: ; preds = %entry
37 ; New block.. Make sure 1234 isn't live across basic blocks from before.
38 ; CHECK: movl $1234, f
39 ; CHECK: movl $555, [[R3:%[a-z]+]]
40 ; CHECK-NOT: movl $555, h
41 ; CHECK-NOT: addl $555, i
42 ; CHECK: movl [[R3]], h
43 ; CHECK: addl [[R3]], i
45 if.end: ; preds = %if.then, %entry
46 store i32 1234, i32* @f
47 store i32 555, i32* @h
48 %1 = load i32, i32* @i
49 %add1 = add nsw i32 %1, 555
50 store i32 %add1, i32* @i
54 ; Test -O2 to make sure that all immediates get pulled in to their users.
57 ; CHECK: movl $1234, a
58 ; CHECK: movl $1234, b
61 store i32 1234, i32* @a
62 store i32 1234, i32* @b
67 declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) #1
69 @AA = common global [100 x i8] zeroinitializer, align 1
71 ; memset gets lowered in DAG. Constant merging should hoist all the
72 ; immediates used to store to the individual memory locations. Make
73 ; sure we don't directly store the immediates.
74 define void @foomemset() optsize {
75 ; CHECK-LABEL: foomemset:
76 ; CHECK-NOT: movl ${{.*}}, AA
77 ; CHECK: mov{{l|q}} %{{e|r}}ax, AA
80 call void @llvm.memset.p0i8.i32(i8* getelementptr inbounds ([100 x i8], [100 x i8]* @AA, i32 0, i32 0), i8 33, i32 24, i32 1, i1 false)