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; REQUIRES: asserts
;; Both functions in this testcase should codegen to the same function, and
;; neither of them should require spilling anything to the stack.
; RUN: llc < %s -march=x86 -stats 2>&1 | \
; RUN: not grep "Number of register spills"
;; This can be compiled to use three registers if the loads are not
;; folded into the multiplies, 2 registers otherwise.
define i32 @regpressure1(i32* %P) {
%A = load i32, i32* %P ; <i32> [#uses=1]
%Bp = getelementptr i32, i32* %P, i32 1 ; <i32*> [#uses=1]
%B = load i32, i32* %Bp ; <i32> [#uses=1]
%s1 = mul i32 %A, %B ; <i32> [#uses=1]
%Cp = getelementptr i32, i32* %P, i32 2 ; <i32*> [#uses=1]
%C = load i32, i32* %Cp ; <i32> [#uses=1]
%s2 = mul i32 %s1, %C ; <i32> [#uses=1]
%Dp = getelementptr i32, i32* %P, i32 3 ; <i32*> [#uses=1]
%D = load i32, i32* %Dp ; <i32> [#uses=1]
%s3 = mul i32 %s2, %D ; <i32> [#uses=1]
%Ep = getelementptr i32, i32* %P, i32 4 ; <i32*> [#uses=1]
%E = load i32, i32* %Ep ; <i32> [#uses=1]
%s4 = mul i32 %s3, %E ; <i32> [#uses=1]
%Fp = getelementptr i32, i32* %P, i32 5 ; <i32*> [#uses=1]
%F = load i32, i32* %Fp ; <i32> [#uses=1]
%s5 = mul i32 %s4, %F ; <i32> [#uses=1]
%Gp = getelementptr i32, i32* %P, i32 6 ; <i32*> [#uses=1]
%G = load i32, i32* %Gp ; <i32> [#uses=1]
%s6 = mul i32 %s5, %G ; <i32> [#uses=1]
%Hp = getelementptr i32, i32* %P, i32 7 ; <i32*> [#uses=1]
%H = load i32, i32* %Hp ; <i32> [#uses=1]
%s7 = mul i32 %s6, %H ; <i32> [#uses=1]
%Ip = getelementptr i32, i32* %P, i32 8 ; <i32*> [#uses=1]
%I = load i32, i32* %Ip ; <i32> [#uses=1]
%s8 = mul i32 %s7, %I ; <i32> [#uses=1]
%Jp = getelementptr i32, i32* %P, i32 9 ; <i32*> [#uses=1]
%J = load i32, i32* %Jp ; <i32> [#uses=1]
%s9 = mul i32 %s8, %J ; <i32> [#uses=1]
ret i32 %s9
}
define i32 @regpressure2(i32* %P) {
%A = load i32, i32* %P ; <i32> [#uses=1]
%Bp = getelementptr i32, i32* %P, i32 1 ; <i32*> [#uses=1]
%B = load i32, i32* %Bp ; <i32> [#uses=1]
%Cp = getelementptr i32, i32* %P, i32 2 ; <i32*> [#uses=1]
%C = load i32, i32* %Cp ; <i32> [#uses=1]
%Dp = getelementptr i32, i32* %P, i32 3 ; <i32*> [#uses=1]
%D = load i32, i32* %Dp ; <i32> [#uses=1]
%Ep = getelementptr i32, i32* %P, i32 4 ; <i32*> [#uses=1]
%E = load i32, i32* %Ep ; <i32> [#uses=1]
%Fp = getelementptr i32, i32* %P, i32 5 ; <i32*> [#uses=1]
%F = load i32, i32* %Fp ; <i32> [#uses=1]
%Gp = getelementptr i32, i32* %P, i32 6 ; <i32*> [#uses=1]
%G = load i32, i32* %Gp ; <i32> [#uses=1]
%Hp = getelementptr i32, i32* %P, i32 7 ; <i32*> [#uses=1]
%H = load i32, i32* %Hp ; <i32> [#uses=1]
%Ip = getelementptr i32, i32* %P, i32 8 ; <i32*> [#uses=1]
%I = load i32, i32* %Ip ; <i32> [#uses=1]
%Jp = getelementptr i32, i32* %P, i32 9 ; <i32*> [#uses=1]
%J = load i32, i32* %Jp ; <i32> [#uses=1]
%s1 = mul i32 %A, %B ; <i32> [#uses=1]
%s2 = mul i32 %s1, %C ; <i32> [#uses=1]
%s3 = mul i32 %s2, %D ; <i32> [#uses=1]
%s4 = mul i32 %s3, %E ; <i32> [#uses=1]
%s5 = mul i32 %s4, %F ; <i32> [#uses=1]
%s6 = mul i32 %s5, %G ; <i32> [#uses=1]
%s7 = mul i32 %s6, %H ; <i32> [#uses=1]
%s8 = mul i32 %s7, %I ; <i32> [#uses=1]
%s9 = mul i32 %s8, %J ; <i32> [#uses=1]
ret i32 %s9
}
define i32 @regpressure3(i16* %P, i1 %Cond, i32* %Other) {
%A = load i16, i16* %P ; <i16> [#uses=1]
%Bp = getelementptr i16, i16* %P, i32 1 ; <i16*> [#uses=1]
%B = load i16, i16* %Bp ; <i16> [#uses=1]
%Cp = getelementptr i16, i16* %P, i32 2 ; <i16*> [#uses=1]
%C = load i16, i16* %Cp ; <i16> [#uses=1]
%Dp = getelementptr i16, i16* %P, i32 3 ; <i16*> [#uses=1]
%D = load i16, i16* %Dp ; <i16> [#uses=1]
%Ep = getelementptr i16, i16* %P, i32 4 ; <i16*> [#uses=1]
%E = load i16, i16* %Ep ; <i16> [#uses=1]
%Fp = getelementptr i16, i16* %P, i32 5 ; <i16*> [#uses=1]
%F = load i16, i16* %Fp ; <i16> [#uses=1]
%Gp = getelementptr i16, i16* %P, i32 6 ; <i16*> [#uses=1]
%G = load i16, i16* %Gp ; <i16> [#uses=1]
%Hp = getelementptr i16, i16* %P, i32 7 ; <i16*> [#uses=1]
%H = load i16, i16* %Hp ; <i16> [#uses=1]
%Ip = getelementptr i16, i16* %P, i32 8 ; <i16*> [#uses=1]
%I = load i16, i16* %Ip ; <i16> [#uses=1]
%Jp = getelementptr i16, i16* %P, i32 9 ; <i16*> [#uses=1]
%J = load i16, i16* %Jp ; <i16> [#uses=1]
%A.upgrd.1 = sext i16 %A to i32 ; <i32> [#uses=1]
%B.upgrd.2 = sext i16 %B to i32 ; <i32> [#uses=1]
%D.upgrd.3 = sext i16 %D to i32 ; <i32> [#uses=1]
%C.upgrd.4 = sext i16 %C to i32 ; <i32> [#uses=1]
%E.upgrd.5 = sext i16 %E to i32 ; <i32> [#uses=1]
%F.upgrd.6 = sext i16 %F to i32 ; <i32> [#uses=1]
%G.upgrd.7 = sext i16 %G to i32 ; <i32> [#uses=1]
%H.upgrd.8 = sext i16 %H to i32 ; <i32> [#uses=1]
%I.upgrd.9 = sext i16 %I to i32 ; <i32> [#uses=1]
%J.upgrd.10 = sext i16 %J to i32 ; <i32> [#uses=1]
%s1 = add i32 %A.upgrd.1, %B.upgrd.2 ; <i32> [#uses=1]
%s2 = add i32 %C.upgrd.4, %s1 ; <i32> [#uses=1]
%s3 = add i32 %D.upgrd.3, %s2 ; <i32> [#uses=1]
%s4 = add i32 %E.upgrd.5, %s3 ; <i32> [#uses=1]
%s5 = add i32 %F.upgrd.6, %s4 ; <i32> [#uses=1]
%s6 = add i32 %G.upgrd.7, %s5 ; <i32> [#uses=1]
%s7 = add i32 %H.upgrd.8, %s6 ; <i32> [#uses=1]
%s8 = add i32 %I.upgrd.9, %s7 ; <i32> [#uses=1]
%s9 = add i32 %J.upgrd.10, %s8 ; <i32> [#uses=1]
ret i32 %s9
}
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