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