mirror of
https://github.com/c64scene-ar/llvm-6502.git
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0bbbc52dc8
We ignore the cpu frontend and focus on pipeline utilization. We do this because we don't have a good way to estimate the loop body size at the IR level. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172964 91177308-0d34-0410-b5e6-96231b3b80d8
72 lines
2.4 KiB
LLVM
72 lines
2.4 KiB
LLVM
; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx -force-vector-width=4 -force-vector-unroll=0 -dce -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.8.0"
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; Don't unroll when we have register pressure.
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;CHECK: reg_pressure
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;CHECK: load <4 x double>
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;CHECK-NOT: load <4 x double>
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;CHECK: store <4 x double>
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;CHECK-NOT: store <4 x double>
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;CHECK: ret
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define void @reg_pressure(double* nocapture %A, i32 %n) nounwind uwtable ssp {
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%1 = sext i32 %n to i64
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br label %2
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; <label>:2 ; preds = %2, %0
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%indvars.iv = phi i64 [ %indvars.iv.next, %2 ], [ %1, %0 ]
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%3 = getelementptr inbounds double* %A, i64 %indvars.iv
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%4 = load double* %3, align 8
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%5 = fadd double %4, 3.000000e+00
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%6 = fmul double %4, 2.000000e+00
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%7 = fadd double %5, %6
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%8 = fadd double %7, 2.000000e+00
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%9 = fmul double %8, 5.000000e-01
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%10 = fadd double %6, %9
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%11 = fsub double %10, %5
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%12 = fadd double %4, %11
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%13 = fdiv double %8, %12
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%14 = fmul double %13, %8
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%15 = fmul double %6, %14
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%16 = fmul double %5, %15
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%17 = fadd double %16, -3.000000e+00
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%18 = fsub double %4, %5
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%19 = fadd double %6, %18
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%20 = fadd double %13, %19
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%21 = fadd double %20, %17
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%22 = fadd double %21, 3.000000e+00
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%23 = fmul double %4, %22
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store double %23, double* %3, align 8
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%indvars.iv.next = add i64 %indvars.iv, -1
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%24 = trunc i64 %indvars.iv to i32
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%25 = icmp eq i32 %24, 0
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br i1 %25, label %26, label %2
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; <label>:26 ; preds = %2
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ret void
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}
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; This is a small loop. Unroll it twice.
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;CHECK: small_loop
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;CHECK: xor
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;CHECK: xor
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;CHECK: ret
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define void @small_loop(i16* nocapture %A, i64 %n) nounwind uwtable ssp {
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%1 = icmp eq i64 %n, 0
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br i1 %1, label %._crit_edge, label %.lr.ph
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.lr.ph: ; preds = %0, %.lr.ph
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%i.01 = phi i64 [ %5, %.lr.ph ], [ 0, %0 ]
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%2 = getelementptr inbounds i16* %A, i64 %i.01
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%3 = load i16* %2, align 2
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%4 = xor i16 %3, 3
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store i16 %4, i16* %2, align 2
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%5 = add i64 %i.01, 1
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%exitcond = icmp eq i64 %5, %n
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br i1 %exitcond, label %._crit_edge, label %.lr.ph
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._crit_edge: ; preds = %.lr.ph, %0
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ret void
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}
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