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This is a carefully contrived testcase where the X86 ISel is emitting all loads
before other ops, causing it to spill like mad. This occurs in 164.gzip:flush_block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19648 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -70,3 +70,48 @@ int %regpressure2(int* %P) {
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ret int %s9
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}
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;; adds should be the same as muls.
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int %regpressure3(short* %P, bool %Cond, int* %Other) {
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%A = load short* %P
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%Bp = getelementptr short* %P, int 1
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%B = load short* %Bp
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%Cp = getelementptr short* %P, int 2
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%C = load short* %Cp
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%Dp = getelementptr short* %P, int 3
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%D = load short* %Dp
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%Ep = getelementptr short* %P, int 4
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%E = load short* %Ep
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%Fp = getelementptr short* %P, int 5
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%F = load short* %Fp
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%Gp = getelementptr short* %P, int 6
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%G = load short* %Gp
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%Hp = getelementptr short* %P, int 7
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%H = load short* %Hp
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%Ip = getelementptr short* %P, int 8
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%I = load short* %Ip
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%Jp = getelementptr short* %P, int 9
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%J = load short* %Jp
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;; These casts prevent folding the loads into the adds.
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%A = cast short %A to int
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%B = cast short %B to int
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%D = cast short %D to int
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%C = cast short %C to int
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%E = cast short %E to int
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%F = cast short %F to int
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%G = cast short %G to int
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%H = cast short %H to int
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%I = cast short %I to int
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%J = cast short %J to int
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%s1 = add int %A, %B
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%s2 = add int %C, %s1
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%s3 = add int %D, %s2
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%s4 = add int %E, %s3
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%s5 = add int %F, %s4
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%s6 = add int %G, %s5
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%s7 = add int %H, %s6
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%s8 = add int %I, %s7
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%s9 = add int %J, %s8
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ret int %s9
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}
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