mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-29 13:29:28 +00:00
5b00f4edcb
Namely, check if the target allows to fold more that one register in the addressing mode and if yes, adjust the cost accordingly. Prior to this commit, reg1 + scale * reg2 accesses were artificially preferred to reg1 + reg2 accesses. Indeed, the cost model wrongly assumed that reg1 + reg2 needs a temporary register for the computation, whereas it was correctly estimated for reg1 + scale * reg2. <rdar://problem/13973908> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183021 91177308-0d34-0410-b5e6-96231b3b80d8
244 lines
6.5 KiB
LLVM
244 lines
6.5 KiB
LLVM
; RUN: llc < %s -mcpu=generic -march=x86-64 > %t
|
|
; RUN: not grep and %t
|
|
; RUN: not grep movz %t
|
|
; RUN: not grep sar %t
|
|
; RUN: not grep shl %t
|
|
; RUN: grep add %t | count 5
|
|
; RUN: grep inc %t | count 2
|
|
; RUN: grep lea %t | count 3
|
|
|
|
; Optimize away zext-inreg and sext-inreg on the loop induction
|
|
; variable using trip-count information.
|
|
|
|
define void @count_up(double* %d, i64 %n) nounwind {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %loop ]
|
|
%indvar.i8 = and i64 %indvar, 255
|
|
%t0 = getelementptr double* %d, i64 %indvar.i8
|
|
%t1 = load double* %t0
|
|
%t2 = fmul double %t1, 0.1
|
|
store double %t2, double* %t0
|
|
%indvar.i24 = and i64 %indvar, 16777215
|
|
%t3 = getelementptr double* %d, i64 %indvar.i24
|
|
%t4 = load double* %t3
|
|
%t5 = fmul double %t4, 2.3
|
|
store double %t5, double* %t3
|
|
%t6 = getelementptr double* %d, i64 %indvar
|
|
%t7 = load double* %t6
|
|
%t8 = fmul double %t7, 4.5
|
|
store double %t8, double* %t6
|
|
%indvar.next = add i64 %indvar, 1
|
|
%exitcond = icmp eq i64 %indvar.next, 10
|
|
br i1 %exitcond, label %return, label %loop
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
define void @count_down(double* %d, i64 %n) nounwind {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%indvar = phi i64 [ 10, %entry ], [ %indvar.next, %loop ]
|
|
%indvar.i8 = and i64 %indvar, 255
|
|
%t0 = getelementptr double* %d, i64 %indvar.i8
|
|
%t1 = load double* %t0
|
|
%t2 = fmul double %t1, 0.1
|
|
store double %t2, double* %t0
|
|
%indvar.i24 = and i64 %indvar, 16777215
|
|
%t3 = getelementptr double* %d, i64 %indvar.i24
|
|
%t4 = load double* %t3
|
|
%t5 = fmul double %t4, 2.3
|
|
store double %t5, double* %t3
|
|
%t6 = getelementptr double* %d, i64 %indvar
|
|
%t7 = load double* %t6
|
|
%t8 = fmul double %t7, 4.5
|
|
store double %t8, double* %t6
|
|
%indvar.next = sub i64 %indvar, 1
|
|
%exitcond = icmp eq i64 %indvar.next, 0
|
|
br i1 %exitcond, label %return, label %loop
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
define void @count_up_signed(double* %d, i64 %n) nounwind {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %loop ]
|
|
%s0 = shl i64 %indvar, 8
|
|
%indvar.i8 = ashr i64 %s0, 8
|
|
%t0 = getelementptr double* %d, i64 %indvar.i8
|
|
%t1 = load double* %t0
|
|
%t2 = fmul double %t1, 0.1
|
|
store double %t2, double* %t0
|
|
%s1 = shl i64 %indvar, 24
|
|
%indvar.i24 = ashr i64 %s1, 24
|
|
%t3 = getelementptr double* %d, i64 %indvar.i24
|
|
%t4 = load double* %t3
|
|
%t5 = fmul double %t4, 2.3
|
|
store double %t5, double* %t3
|
|
%t6 = getelementptr double* %d, i64 %indvar
|
|
%t7 = load double* %t6
|
|
%t8 = fmul double %t7, 4.5
|
|
store double %t8, double* %t6
|
|
%indvar.next = add i64 %indvar, 1
|
|
%exitcond = icmp eq i64 %indvar.next, 10
|
|
br i1 %exitcond, label %return, label %loop
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
define void @count_down_signed(double* %d, i64 %n) nounwind {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%indvar = phi i64 [ 10, %entry ], [ %indvar.next, %loop ]
|
|
%s0 = shl i64 %indvar, 8
|
|
%indvar.i8 = ashr i64 %s0, 8
|
|
%t0 = getelementptr double* %d, i64 %indvar.i8
|
|
%t1 = load double* %t0
|
|
%t2 = fmul double %t1, 0.1
|
|
store double %t2, double* %t0
|
|
%s1 = shl i64 %indvar, 24
|
|
%indvar.i24 = ashr i64 %s1, 24
|
|
%t3 = getelementptr double* %d, i64 %indvar.i24
|
|
%t4 = load double* %t3
|
|
%t5 = fmul double %t4, 2.3
|
|
store double %t5, double* %t3
|
|
%t6 = getelementptr double* %d, i64 %indvar
|
|
%t7 = load double* %t6
|
|
%t8 = fmul double %t7, 4.5
|
|
store double %t8, double* %t6
|
|
%indvar.next = sub i64 %indvar, 1
|
|
%exitcond = icmp eq i64 %indvar.next, 0
|
|
br i1 %exitcond, label %return, label %loop
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
define void @another_count_up(double* %d, i64 %n) nounwind {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%indvar = phi i64 [ 18446744073709551615, %entry ], [ %indvar.next, %loop ]
|
|
%indvar.i8 = and i64 %indvar, 255
|
|
%t0 = getelementptr double* %d, i64 %indvar.i8
|
|
%t1 = load double* %t0
|
|
%t2 = fmul double %t1, 0.1
|
|
store double %t2, double* %t0
|
|
%indvar.i24 = and i64 %indvar, 16777215
|
|
%t3 = getelementptr double* %d, i64 %indvar.i24
|
|
%t4 = load double* %t3
|
|
%t5 = fmul double %t4, 2.3
|
|
store double %t5, double* %t3
|
|
%t6 = getelementptr double* %d, i64 %indvar
|
|
%t7 = load double* %t6
|
|
%t8 = fmul double %t7, 4.5
|
|
store double %t8, double* %t6
|
|
%indvar.next = add i64 %indvar, 1
|
|
%exitcond = icmp eq i64 %indvar.next, 0
|
|
br i1 %exitcond, label %return, label %loop
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
define void @another_count_down(double* %d, i64 %n) nounwind {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %loop ]
|
|
%indvar.i8 = and i64 %indvar, 255
|
|
%t0 = getelementptr double* %d, i64 %indvar.i8
|
|
%t1 = load double* %t0
|
|
%t2 = fmul double %t1, 0.1
|
|
store double %t2, double* %t0
|
|
%indvar.i24 = and i64 %indvar, 16777215
|
|
%t3 = getelementptr double* %d, i64 %indvar.i24
|
|
%t4 = load double* %t3
|
|
%t5 = fdiv double %t4, 2.3
|
|
store double %t5, double* %t3
|
|
%t6 = getelementptr double* %d, i64 %indvar
|
|
%t7 = load double* %t6
|
|
%t8 = fmul double %t7, 4.5
|
|
store double %t8, double* %t6
|
|
%indvar.next = sub i64 %indvar, 1
|
|
%exitcond = icmp eq i64 %indvar.next, 18446744073709551615
|
|
br i1 %exitcond, label %return, label %loop
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
define void @another_count_up_signed(double* %d, i64 %n) nounwind {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%indvar = phi i64 [ 18446744073709551615, %entry ], [ %indvar.next, %loop ]
|
|
%s0 = shl i64 %indvar, 8
|
|
%indvar.i8 = ashr i64 %s0, 8
|
|
%t0 = getelementptr double* %d, i64 %indvar.i8
|
|
%t1 = load double* %t0
|
|
%t2 = fmul double %t1, 0.1
|
|
store double %t2, double* %t0
|
|
%s1 = shl i64 %indvar, 24
|
|
%indvar.i24 = ashr i64 %s1, 24
|
|
%t3 = getelementptr double* %d, i64 %indvar.i24
|
|
%t4 = load double* %t3
|
|
%t5 = fdiv double %t4, 2.3
|
|
store double %t5, double* %t3
|
|
%t6 = getelementptr double* %d, i64 %indvar
|
|
%t7 = load double* %t6
|
|
%t8 = fmul double %t7, 4.5
|
|
store double %t8, double* %t6
|
|
%indvar.next = add i64 %indvar, 1
|
|
%exitcond = icmp eq i64 %indvar.next, 0
|
|
br i1 %exitcond, label %return, label %loop
|
|
|
|
return:
|
|
ret void
|
|
}
|
|
|
|
define void @another_count_down_signed(double* %d, i64 %n) nounwind {
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %loop ]
|
|
%s0 = shl i64 %indvar, 8
|
|
%indvar.i8 = ashr i64 %s0, 8
|
|
%t0 = getelementptr double* %d, i64 %indvar.i8
|
|
%t1 = load double* %t0
|
|
%t2 = fmul double %t1, 0.1
|
|
store double %t2, double* %t0
|
|
%s1 = shl i64 %indvar, 24
|
|
%indvar.i24 = ashr i64 %s1, 24
|
|
%t3 = getelementptr double* %d, i64 %indvar.i24
|
|
%t4 = load double* %t3
|
|
%t5 = fdiv double %t4, 2.3
|
|
store double %t5, double* %t3
|
|
%t6 = getelementptr double* %d, i64 %indvar
|
|
%t7 = load double* %t6
|
|
%t8 = fmul double %t7, 4.5
|
|
store double %t8, double* %t6
|
|
%indvar.next = sub i64 %indvar, 1
|
|
%exitcond = icmp eq i64 %indvar.next, 18446744073709551615
|
|
br i1 %exitcond, label %return, label %loop
|
|
|
|
return:
|
|
ret void
|
|
}
|