1; REQUIRES: asserts
2;; Both functions in this testcase should codegen to the same function, and
3;; neither of them should require spilling anything to the stack.
4
5; RUN: llc < %s -march=x86 -stats 2>&1 | \
6; RUN:   not grep "Number of register spills"
7
8;; This can be compiled to use three registers if the loads are not
9;; folded into the multiplies, 2 registers otherwise.
10
11define i32 @regpressure1(i32* %P) {
12	%A = load i32* %P		; <i32> [#uses=1]
13	%Bp = getelementptr i32* %P, i32 1		; <i32*> [#uses=1]
14	%B = load i32* %Bp		; <i32> [#uses=1]
15	%s1 = mul i32 %A, %B		; <i32> [#uses=1]
16	%Cp = getelementptr i32* %P, i32 2		; <i32*> [#uses=1]
17	%C = load i32* %Cp		; <i32> [#uses=1]
18	%s2 = mul i32 %s1, %C		; <i32> [#uses=1]
19	%Dp = getelementptr i32* %P, i32 3		; <i32*> [#uses=1]
20	%D = load i32* %Dp		; <i32> [#uses=1]
21	%s3 = mul i32 %s2, %D		; <i32> [#uses=1]
22	%Ep = getelementptr i32* %P, i32 4		; <i32*> [#uses=1]
23	%E = load i32* %Ep		; <i32> [#uses=1]
24	%s4 = mul i32 %s3, %E		; <i32> [#uses=1]
25	%Fp = getelementptr i32* %P, i32 5		; <i32*> [#uses=1]
26	%F = load i32* %Fp		; <i32> [#uses=1]
27	%s5 = mul i32 %s4, %F		; <i32> [#uses=1]
28	%Gp = getelementptr i32* %P, i32 6		; <i32*> [#uses=1]
29	%G = load i32* %Gp		; <i32> [#uses=1]
30	%s6 = mul i32 %s5, %G		; <i32> [#uses=1]
31	%Hp = getelementptr i32* %P, i32 7		; <i32*> [#uses=1]
32	%H = load i32* %Hp		; <i32> [#uses=1]
33	%s7 = mul i32 %s6, %H		; <i32> [#uses=1]
34	%Ip = getelementptr i32* %P, i32 8		; <i32*> [#uses=1]
35	%I = load i32* %Ip		; <i32> [#uses=1]
36	%s8 = mul i32 %s7, %I		; <i32> [#uses=1]
37	%Jp = getelementptr i32* %P, i32 9		; <i32*> [#uses=1]
38	%J = load i32* %Jp		; <i32> [#uses=1]
39	%s9 = mul i32 %s8, %J		; <i32> [#uses=1]
40	ret i32 %s9
41}
42
43define i32 @regpressure2(i32* %P) {
44	%A = load i32* %P		; <i32> [#uses=1]
45	%Bp = getelementptr i32* %P, i32 1		; <i32*> [#uses=1]
46	%B = load i32* %Bp		; <i32> [#uses=1]
47	%Cp = getelementptr i32* %P, i32 2		; <i32*> [#uses=1]
48	%C = load i32* %Cp		; <i32> [#uses=1]
49	%Dp = getelementptr i32* %P, i32 3		; <i32*> [#uses=1]
50	%D = load i32* %Dp		; <i32> [#uses=1]
51	%Ep = getelementptr i32* %P, i32 4		; <i32*> [#uses=1]
52	%E = load i32* %Ep		; <i32> [#uses=1]
53	%Fp = getelementptr i32* %P, i32 5		; <i32*> [#uses=1]
54	%F = load i32* %Fp		; <i32> [#uses=1]
55	%Gp = getelementptr i32* %P, i32 6		; <i32*> [#uses=1]
56	%G = load i32* %Gp		; <i32> [#uses=1]
57	%Hp = getelementptr i32* %P, i32 7		; <i32*> [#uses=1]
58	%H = load i32* %Hp		; <i32> [#uses=1]
59	%Ip = getelementptr i32* %P, i32 8		; <i32*> [#uses=1]
60	%I = load i32* %Ip		; <i32> [#uses=1]
61	%Jp = getelementptr i32* %P, i32 9		; <i32*> [#uses=1]
62	%J = load i32* %Jp		; <i32> [#uses=1]
63	%s1 = mul i32 %A, %B		; <i32> [#uses=1]
64	%s2 = mul i32 %s1, %C		; <i32> [#uses=1]
65	%s3 = mul i32 %s2, %D		; <i32> [#uses=1]
66	%s4 = mul i32 %s3, %E		; <i32> [#uses=1]
67	%s5 = mul i32 %s4, %F		; <i32> [#uses=1]
68	%s6 = mul i32 %s5, %G		; <i32> [#uses=1]
69	%s7 = mul i32 %s6, %H		; <i32> [#uses=1]
70	%s8 = mul i32 %s7, %I		; <i32> [#uses=1]
71	%s9 = mul i32 %s8, %J		; <i32> [#uses=1]
72	ret i32 %s9
73}
74
75define i32 @regpressure3(i16* %P, i1 %Cond, i32* %Other) {
76	%A = load i16* %P		; <i16> [#uses=1]
77	%Bp = getelementptr i16* %P, i32 1		; <i16*> [#uses=1]
78	%B = load i16* %Bp		; <i16> [#uses=1]
79	%Cp = getelementptr i16* %P, i32 2		; <i16*> [#uses=1]
80	%C = load i16* %Cp		; <i16> [#uses=1]
81	%Dp = getelementptr i16* %P, i32 3		; <i16*> [#uses=1]
82	%D = load i16* %Dp		; <i16> [#uses=1]
83	%Ep = getelementptr i16* %P, i32 4		; <i16*> [#uses=1]
84	%E = load i16* %Ep		; <i16> [#uses=1]
85	%Fp = getelementptr i16* %P, i32 5		; <i16*> [#uses=1]
86	%F = load i16* %Fp		; <i16> [#uses=1]
87	%Gp = getelementptr i16* %P, i32 6		; <i16*> [#uses=1]
88	%G = load i16* %Gp		; <i16> [#uses=1]
89	%Hp = getelementptr i16* %P, i32 7		; <i16*> [#uses=1]
90	%H = load i16* %Hp		; <i16> [#uses=1]
91	%Ip = getelementptr i16* %P, i32 8		; <i16*> [#uses=1]
92	%I = load i16* %Ip		; <i16> [#uses=1]
93	%Jp = getelementptr i16* %P, i32 9		; <i16*> [#uses=1]
94	%J = load i16* %Jp		; <i16> [#uses=1]
95	%A.upgrd.1 = sext i16 %A to i32		; <i32> [#uses=1]
96	%B.upgrd.2 = sext i16 %B to i32		; <i32> [#uses=1]
97	%D.upgrd.3 = sext i16 %D to i32		; <i32> [#uses=1]
98	%C.upgrd.4 = sext i16 %C to i32		; <i32> [#uses=1]
99	%E.upgrd.5 = sext i16 %E to i32		; <i32> [#uses=1]
100	%F.upgrd.6 = sext i16 %F to i32		; <i32> [#uses=1]
101	%G.upgrd.7 = sext i16 %G to i32		; <i32> [#uses=1]
102	%H.upgrd.8 = sext i16 %H to i32		; <i32> [#uses=1]
103	%I.upgrd.9 = sext i16 %I to i32		; <i32> [#uses=1]
104	%J.upgrd.10 = sext i16 %J to i32		; <i32> [#uses=1]
105	%s1 = add i32 %A.upgrd.1, %B.upgrd.2		; <i32> [#uses=1]
106	%s2 = add i32 %C.upgrd.4, %s1		; <i32> [#uses=1]
107	%s3 = add i32 %D.upgrd.3, %s2		; <i32> [#uses=1]
108	%s4 = add i32 %E.upgrd.5, %s3		; <i32> [#uses=1]
109	%s5 = add i32 %F.upgrd.6, %s4		; <i32> [#uses=1]
110	%s6 = add i32 %G.upgrd.7, %s5		; <i32> [#uses=1]
111	%s7 = add i32 %H.upgrd.8, %s6		; <i32> [#uses=1]
112	%s8 = add i32 %I.upgrd.9, %s7		; <i32> [#uses=1]
113	%s9 = add i32 %J.upgrd.10, %s8		; <i32> [#uses=1]
114	ret i32 %s9
115}
116