mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-30 19:29:20 +00:00
623a7e146b
instruction lower optimization" in the pre-RA scheduler. The optimization, rather the hack, was done before MI use-list was available. Now we should be able to implement it in a better way, perhaps in the two-address pass until a MI scheduler is available. Now that the scheduler has to backtrack to handle call sequences. Adding artificial scheduling constraints is just not safe. Furthermore, the hack is not taking all the other scheduling decisions into consideration so it's just as likely to pessimize code. So I view disabling this optimization goodness regardless of PR11314. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144267 91177308-0d34-0410-b5e6-96231b3b80d8
245 lines
6.5 KiB
LLVM
245 lines
6.5 KiB
LLVM
; RUN: llc < %s -march=x86-64 > %t
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; RUN: not grep and %t
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; RUN: not grep movz %t
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; RUN: not grep sar %t
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; RUN: not grep shl %t
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; RUN: grep add %t | count 1
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; RUN: grep inc %t | count 4
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; RUN: grep dec %t | count 2
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; RUN: grep lea %t | count 3
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; Optimize away zext-inreg and sext-inreg on the loop induction
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; variable using trip-count information.
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define void @count_up(double* %d, i64 %n) nounwind {
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entry:
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br label %loop
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loop:
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%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %loop ]
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%indvar.i8 = and i64 %indvar, 255
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%t0 = getelementptr double* %d, i64 %indvar.i8
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%t1 = load double* %t0
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%t2 = fmul double %t1, 0.1
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store double %t2, double* %t0
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%indvar.i24 = and i64 %indvar, 16777215
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%t3 = getelementptr double* %d, i64 %indvar.i24
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%t4 = load double* %t3
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%t5 = fmul double %t4, 2.3
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store double %t5, double* %t3
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%t6 = getelementptr double* %d, i64 %indvar
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%t7 = load double* %t6
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%t8 = fmul double %t7, 4.5
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store double %t8, double* %t6
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%indvar.next = add i64 %indvar, 1
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%exitcond = icmp eq i64 %indvar.next, 10
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br i1 %exitcond, label %return, label %loop
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return:
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ret void
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}
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define void @count_down(double* %d, i64 %n) nounwind {
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entry:
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br label %loop
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loop:
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%indvar = phi i64 [ 10, %entry ], [ %indvar.next, %loop ]
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%indvar.i8 = and i64 %indvar, 255
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%t0 = getelementptr double* %d, i64 %indvar.i8
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%t1 = load double* %t0
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%t2 = fmul double %t1, 0.1
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store double %t2, double* %t0
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%indvar.i24 = and i64 %indvar, 16777215
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%t3 = getelementptr double* %d, i64 %indvar.i24
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%t4 = load double* %t3
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%t5 = fmul double %t4, 2.3
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store double %t5, double* %t3
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%t6 = getelementptr double* %d, i64 %indvar
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%t7 = load double* %t6
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%t8 = fmul double %t7, 4.5
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store double %t8, double* %t6
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%indvar.next = sub i64 %indvar, 1
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%exitcond = icmp eq i64 %indvar.next, 0
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br i1 %exitcond, label %return, label %loop
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return:
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ret void
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}
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define void @count_up_signed(double* %d, i64 %n) nounwind {
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entry:
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br label %loop
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loop:
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%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %loop ]
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%s0 = shl i64 %indvar, 8
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%indvar.i8 = ashr i64 %s0, 8
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%t0 = getelementptr double* %d, i64 %indvar.i8
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%t1 = load double* %t0
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%t2 = fmul double %t1, 0.1
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store double %t2, double* %t0
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%s1 = shl i64 %indvar, 24
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%indvar.i24 = ashr i64 %s1, 24
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%t3 = getelementptr double* %d, i64 %indvar.i24
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%t4 = load double* %t3
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%t5 = fmul double %t4, 2.3
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store double %t5, double* %t3
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%t6 = getelementptr double* %d, i64 %indvar
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%t7 = load double* %t6
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%t8 = fmul double %t7, 4.5
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store double %t8, double* %t6
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%indvar.next = add i64 %indvar, 1
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%exitcond = icmp eq i64 %indvar.next, 10
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br i1 %exitcond, label %return, label %loop
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return:
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ret void
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}
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define void @count_down_signed(double* %d, i64 %n) nounwind {
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entry:
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br label %loop
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loop:
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%indvar = phi i64 [ 10, %entry ], [ %indvar.next, %loop ]
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%s0 = shl i64 %indvar, 8
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%indvar.i8 = ashr i64 %s0, 8
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%t0 = getelementptr double* %d, i64 %indvar.i8
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%t1 = load double* %t0
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%t2 = fmul double %t1, 0.1
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store double %t2, double* %t0
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%s1 = shl i64 %indvar, 24
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%indvar.i24 = ashr i64 %s1, 24
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%t3 = getelementptr double* %d, i64 %indvar.i24
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%t4 = load double* %t3
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%t5 = fmul double %t4, 2.3
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store double %t5, double* %t3
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%t6 = getelementptr double* %d, i64 %indvar
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%t7 = load double* %t6
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%t8 = fmul double %t7, 4.5
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store double %t8, double* %t6
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%indvar.next = sub i64 %indvar, 1
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%exitcond = icmp eq i64 %indvar.next, 0
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br i1 %exitcond, label %return, label %loop
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return:
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ret void
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}
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define void @another_count_up(double* %d, i64 %n) nounwind {
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entry:
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br label %loop
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loop:
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%indvar = phi i64 [ 18446744073709551615, %entry ], [ %indvar.next, %loop ]
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%indvar.i8 = and i64 %indvar, 255
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%t0 = getelementptr double* %d, i64 %indvar.i8
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%t1 = load double* %t0
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%t2 = fmul double %t1, 0.1
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store double %t2, double* %t0
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%indvar.i24 = and i64 %indvar, 16777215
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%t3 = getelementptr double* %d, i64 %indvar.i24
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%t4 = load double* %t3
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%t5 = fmul double %t4, 2.3
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store double %t5, double* %t3
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%t6 = getelementptr double* %d, i64 %indvar
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%t7 = load double* %t6
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%t8 = fmul double %t7, 4.5
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store double %t8, double* %t6
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%indvar.next = add i64 %indvar, 1
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%exitcond = icmp eq i64 %indvar.next, 0
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br i1 %exitcond, label %return, label %loop
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return:
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ret void
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}
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define void @another_count_down(double* %d, i64 %n) nounwind {
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entry:
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br label %loop
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loop:
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%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %loop ]
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%indvar.i8 = and i64 %indvar, 255
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%t0 = getelementptr double* %d, i64 %indvar.i8
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%t1 = load double* %t0
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%t2 = fmul double %t1, 0.1
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store double %t2, double* %t0
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%indvar.i24 = and i64 %indvar, 16777215
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%t3 = getelementptr double* %d, i64 %indvar.i24
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%t4 = load double* %t3
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%t5 = fdiv double %t4, 2.3
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store double %t5, double* %t3
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%t6 = getelementptr double* %d, i64 %indvar
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%t7 = load double* %t6
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%t8 = fmul double %t7, 4.5
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store double %t8, double* %t6
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%indvar.next = sub i64 %indvar, 1
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%exitcond = icmp eq i64 %indvar.next, 18446744073709551615
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br i1 %exitcond, label %return, label %loop
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return:
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ret void
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}
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define void @another_count_up_signed(double* %d, i64 %n) nounwind {
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entry:
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br label %loop
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loop:
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%indvar = phi i64 [ 18446744073709551615, %entry ], [ %indvar.next, %loop ]
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%s0 = shl i64 %indvar, 8
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%indvar.i8 = ashr i64 %s0, 8
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%t0 = getelementptr double* %d, i64 %indvar.i8
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%t1 = load double* %t0
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%t2 = fmul double %t1, 0.1
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store double %t2, double* %t0
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%s1 = shl i64 %indvar, 24
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%indvar.i24 = ashr i64 %s1, 24
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%t3 = getelementptr double* %d, i64 %indvar.i24
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%t4 = load double* %t3
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%t5 = fdiv double %t4, 2.3
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store double %t5, double* %t3
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%t6 = getelementptr double* %d, i64 %indvar
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%t7 = load double* %t6
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%t8 = fmul double %t7, 4.5
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store double %t8, double* %t6
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%indvar.next = add i64 %indvar, 1
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%exitcond = icmp eq i64 %indvar.next, 0
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br i1 %exitcond, label %return, label %loop
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return:
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ret void
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}
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define void @another_count_down_signed(double* %d, i64 %n) nounwind {
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entry:
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br label %loop
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loop:
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%indvar = phi i64 [ 0, %entry ], [ %indvar.next, %loop ]
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%s0 = shl i64 %indvar, 8
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%indvar.i8 = ashr i64 %s0, 8
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%t0 = getelementptr double* %d, i64 %indvar.i8
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%t1 = load double* %t0
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%t2 = fmul double %t1, 0.1
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store double %t2, double* %t0
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%s1 = shl i64 %indvar, 24
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%indvar.i24 = ashr i64 %s1, 24
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%t3 = getelementptr double* %d, i64 %indvar.i24
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%t4 = load double* %t3
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%t5 = fdiv double %t4, 2.3
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store double %t5, double* %t3
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%t6 = getelementptr double* %d, i64 %indvar
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%t7 = load double* %t6
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%t8 = fmul double %t7, 4.5
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store double %t8, double* %t6
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%indvar.next = sub i64 %indvar, 1
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%exitcond = icmp eq i64 %indvar.next, 18446744073709551615
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br i1 %exitcond, label %return, label %loop
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return:
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ret void
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}
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