mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
118 lines
3.1 KiB
LLVM
118 lines
3.1 KiB
LLVM
;; Both functions in this testcase should codegen to the same function, and
|
|
;; neither of them should require spilling anything to the stack.
|
|
|
|
; RUN: llvm-upgrade < %s | llvm-as | llc -march=x86 -stats 2>&1 | 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.
|
|
int %regpressure1(int* %P) {
|
|
%A = load int* %P
|
|
%Bp = getelementptr int* %P, int 1
|
|
%B = load int* %Bp
|
|
%s1 = mul int %A, %B
|
|
%Cp = getelementptr int* %P, int 2
|
|
%C = load int* %Cp
|
|
%s2 = mul int %s1, %C
|
|
%Dp = getelementptr int* %P, int 3
|
|
%D = load int* %Dp
|
|
%s3 = mul int %s2, %D
|
|
%Ep = getelementptr int* %P, int 4
|
|
%E = load int* %Ep
|
|
%s4 = mul int %s3, %E
|
|
%Fp = getelementptr int* %P, int 5
|
|
%F = load int* %Fp
|
|
%s5 = mul int %s4, %F
|
|
%Gp = getelementptr int* %P, int 6
|
|
%G = load int* %Gp
|
|
%s6 = mul int %s5, %G
|
|
%Hp = getelementptr int* %P, int 7
|
|
%H = load int* %Hp
|
|
%s7 = mul int %s6, %H
|
|
%Ip = getelementptr int* %P, int 8
|
|
%I = load int* %Ip
|
|
%s8 = mul int %s7, %I
|
|
%Jp = getelementptr int* %P, int 9
|
|
%J = load int* %Jp
|
|
%s9 = mul int %s8, %J
|
|
ret int %s9
|
|
}
|
|
|
|
;; This testcase should produce identical code to the test above.
|
|
int %regpressure2(int* %P) {
|
|
%A = load int* %P
|
|
%Bp = getelementptr int* %P, int 1
|
|
%B = load int* %Bp
|
|
%Cp = getelementptr int* %P, int 2
|
|
%C = load int* %Cp
|
|
%Dp = getelementptr int* %P, int 3
|
|
%D = load int* %Dp
|
|
%Ep = getelementptr int* %P, int 4
|
|
%E = load int* %Ep
|
|
%Fp = getelementptr int* %P, int 5
|
|
%F = load int* %Fp
|
|
%Gp = getelementptr int* %P, int 6
|
|
%G = load int* %Gp
|
|
%Hp = getelementptr int* %P, int 7
|
|
%H = load int* %Hp
|
|
%Ip = getelementptr int* %P, int 8
|
|
%I = load int* %Ip
|
|
%Jp = getelementptr int* %P, int 9
|
|
%J = load int* %Jp
|
|
%s1 = mul int %A, %B
|
|
%s2 = mul int %s1, %C
|
|
%s3 = mul int %s2, %D
|
|
%s4 = mul int %s3, %E
|
|
%s5 = mul int %s4, %F
|
|
%s6 = mul int %s5, %G
|
|
%s7 = mul int %s6, %H
|
|
%s8 = mul int %s7, %I
|
|
%s9 = mul int %s8, %J
|
|
ret int %s9
|
|
}
|
|
|
|
;; adds should be the same as muls.
|
|
int %regpressure3(short* %P, bool %Cond, int* %Other) {
|
|
%A = load short* %P
|
|
%Bp = getelementptr short* %P, int 1
|
|
%B = load short* %Bp
|
|
%Cp = getelementptr short* %P, int 2
|
|
%C = load short* %Cp
|
|
%Dp = getelementptr short* %P, int 3
|
|
%D = load short* %Dp
|
|
%Ep = getelementptr short* %P, int 4
|
|
%E = load short* %Ep
|
|
%Fp = getelementptr short* %P, int 5
|
|
%F = load short* %Fp
|
|
%Gp = getelementptr short* %P, int 6
|
|
%G = load short* %Gp
|
|
%Hp = getelementptr short* %P, int 7
|
|
%H = load short* %Hp
|
|
%Ip = getelementptr short* %P, int 8
|
|
%I = load short* %Ip
|
|
%Jp = getelementptr short* %P, int 9
|
|
%J = load short* %Jp
|
|
|
|
;; These casts prevent folding the loads into the adds.
|
|
%A = cast short %A to int
|
|
%B = cast short %B to int
|
|
%D = cast short %D to int
|
|
%C = cast short %C to int
|
|
%E = cast short %E to int
|
|
%F = cast short %F to int
|
|
%G = cast short %G to int
|
|
%H = cast short %H to int
|
|
%I = cast short %I to int
|
|
%J = cast short %J to int
|
|
%s1 = add int %A, %B
|
|
%s2 = add int %C, %s1
|
|
%s3 = add int %D, %s2
|
|
%s4 = add int %E, %s3
|
|
%s5 = add int %F, %s4
|
|
%s6 = add int %G, %s5
|
|
%s7 = add int %H, %s6
|
|
%s8 = add int %I, %s7
|
|
%s9 = add int %J, %s8
|
|
ret int %s9
|
|
}
|
|
|