mirror of
https://github.com/RPCS3/llvm-mirror.git
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8eb3f6d6a0
Fixes a logic error in the MachineScheduler found by Steve Montgomery (and confirmed by Andy). This has gone unfixed for months because the fix has been found to introduce some small performance regressions. However, Andy has recommended that, at this point, we fix this to avoid further dependence on the incorrect behavior (and then follow-up separately on any regressions), and I agree. Fixes PR18883. llvm-svn: 219512
228 lines
11 KiB
LLVM
228 lines
11 KiB
LLVM
; REQUIRES: asserts
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; RUN: llc < %s -march=x86-64 -mcpu=core2 -pre-RA-sched=source -enable-misched -stats 2>&1 | FileCheck %s
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;
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; Verify that register pressure heuristics are working in MachineScheduler.
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;
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; We can further reduce spills in this case with a global register
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; pressure heuristic, like sethi-ullman numbers or biasing toward
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; scheduled subtrees. However, these heuristics are marginally
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; beneficial on x86_64 and exacerbate register pressure in other
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; more complex cases.
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;
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; CHECK: @wrap_mul4
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; CHECK: 23 regalloc - Number of spills inserted
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define void @wrap_mul4(double* nocapture %Out, [4 x double]* nocapture %A, [4 x double]* nocapture %B) #0 {
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entry:
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%arrayidx1.i = getelementptr inbounds [4 x double]* %A, i64 0, i64 0
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%0 = load double* %arrayidx1.i, align 8
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%arrayidx3.i = getelementptr inbounds [4 x double]* %B, i64 0, i64 0
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%1 = load double* %arrayidx3.i, align 8
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%mul.i = fmul double %0, %1
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%arrayidx5.i = getelementptr inbounds [4 x double]* %A, i64 0, i64 1
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%2 = load double* %arrayidx5.i, align 8
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%arrayidx7.i = getelementptr inbounds [4 x double]* %B, i64 1, i64 0
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%3 = load double* %arrayidx7.i, align 8
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%mul8.i = fmul double %2, %3
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%add.i = fadd double %mul.i, %mul8.i
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%arrayidx10.i = getelementptr inbounds [4 x double]* %A, i64 0, i64 2
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%4 = load double* %arrayidx10.i, align 8
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%arrayidx12.i = getelementptr inbounds [4 x double]* %B, i64 2, i64 0
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%5 = load double* %arrayidx12.i, align 8
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%mul13.i = fmul double %4, %5
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%add14.i = fadd double %add.i, %mul13.i
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%arrayidx16.i = getelementptr inbounds [4 x double]* %A, i64 0, i64 3
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%6 = load double* %arrayidx16.i, align 8
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%arrayidx18.i = getelementptr inbounds [4 x double]* %B, i64 3, i64 0
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%7 = load double* %arrayidx18.i, align 8
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%mul19.i = fmul double %6, %7
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%add20.i = fadd double %add14.i, %mul19.i
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%arrayidx25.i = getelementptr inbounds [4 x double]* %B, i64 0, i64 1
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%8 = load double* %arrayidx25.i, align 8
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%mul26.i = fmul double %0, %8
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%arrayidx30.i = getelementptr inbounds [4 x double]* %B, i64 1, i64 1
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%9 = load double* %arrayidx30.i, align 8
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%mul31.i = fmul double %2, %9
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%add32.i = fadd double %mul26.i, %mul31.i
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%arrayidx36.i = getelementptr inbounds [4 x double]* %B, i64 2, i64 1
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%10 = load double* %arrayidx36.i, align 8
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%mul37.i = fmul double %4, %10
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%add38.i = fadd double %add32.i, %mul37.i
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%arrayidx42.i = getelementptr inbounds [4 x double]* %B, i64 3, i64 1
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%11 = load double* %arrayidx42.i, align 8
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%mul43.i = fmul double %6, %11
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%add44.i = fadd double %add38.i, %mul43.i
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%arrayidx49.i = getelementptr inbounds [4 x double]* %B, i64 0, i64 2
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%12 = load double* %arrayidx49.i, align 8
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%mul50.i = fmul double %0, %12
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%arrayidx54.i = getelementptr inbounds [4 x double]* %B, i64 1, i64 2
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%13 = load double* %arrayidx54.i, align 8
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%mul55.i = fmul double %2, %13
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%add56.i = fadd double %mul50.i, %mul55.i
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%arrayidx60.i = getelementptr inbounds [4 x double]* %B, i64 2, i64 2
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%14 = load double* %arrayidx60.i, align 8
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%mul61.i = fmul double %4, %14
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%add62.i = fadd double %add56.i, %mul61.i
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%arrayidx66.i = getelementptr inbounds [4 x double]* %B, i64 3, i64 2
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%15 = load double* %arrayidx66.i, align 8
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%mul67.i = fmul double %6, %15
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%add68.i = fadd double %add62.i, %mul67.i
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%arrayidx73.i = getelementptr inbounds [4 x double]* %B, i64 0, i64 3
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%16 = load double* %arrayidx73.i, align 8
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%mul74.i = fmul double %0, %16
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%arrayidx78.i = getelementptr inbounds [4 x double]* %B, i64 1, i64 3
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%17 = load double* %arrayidx78.i, align 8
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%mul79.i = fmul double %2, %17
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%add80.i = fadd double %mul74.i, %mul79.i
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%arrayidx84.i = getelementptr inbounds [4 x double]* %B, i64 2, i64 3
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%18 = load double* %arrayidx84.i, align 8
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%mul85.i = fmul double %4, %18
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%add86.i = fadd double %add80.i, %mul85.i
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%arrayidx90.i = getelementptr inbounds [4 x double]* %B, i64 3, i64 3
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%19 = load double* %arrayidx90.i, align 8
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%mul91.i = fmul double %6, %19
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%add92.i = fadd double %add86.i, %mul91.i
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%arrayidx95.i = getelementptr inbounds [4 x double]* %A, i64 1, i64 0
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%20 = load double* %arrayidx95.i, align 8
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%mul98.i = fmul double %1, %20
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%arrayidx100.i = getelementptr inbounds [4 x double]* %A, i64 1, i64 1
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%21 = load double* %arrayidx100.i, align 8
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%mul103.i = fmul double %3, %21
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%add104.i = fadd double %mul98.i, %mul103.i
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%arrayidx106.i = getelementptr inbounds [4 x double]* %A, i64 1, i64 2
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%22 = load double* %arrayidx106.i, align 8
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%mul109.i = fmul double %5, %22
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%add110.i = fadd double %add104.i, %mul109.i
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%arrayidx112.i = getelementptr inbounds [4 x double]* %A, i64 1, i64 3
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%23 = load double* %arrayidx112.i, align 8
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%mul115.i = fmul double %7, %23
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%add116.i = fadd double %add110.i, %mul115.i
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%mul122.i = fmul double %8, %20
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%mul127.i = fmul double %9, %21
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%add128.i = fadd double %mul122.i, %mul127.i
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%mul133.i = fmul double %10, %22
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%add134.i = fadd double %add128.i, %mul133.i
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%mul139.i = fmul double %11, %23
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%add140.i = fadd double %add134.i, %mul139.i
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%mul146.i = fmul double %12, %20
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%mul151.i = fmul double %13, %21
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%add152.i = fadd double %mul146.i, %mul151.i
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%mul157.i = fmul double %14, %22
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%add158.i = fadd double %add152.i, %mul157.i
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%mul163.i = fmul double %15, %23
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%add164.i = fadd double %add158.i, %mul163.i
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%mul170.i = fmul double %16, %20
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%mul175.i = fmul double %17, %21
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%add176.i = fadd double %mul170.i, %mul175.i
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%mul181.i = fmul double %18, %22
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%add182.i = fadd double %add176.i, %mul181.i
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%mul187.i = fmul double %19, %23
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%add188.i = fadd double %add182.i, %mul187.i
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%arrayidx191.i = getelementptr inbounds [4 x double]* %A, i64 2, i64 0
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%24 = load double* %arrayidx191.i, align 8
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%mul194.i = fmul double %1, %24
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%arrayidx196.i = getelementptr inbounds [4 x double]* %A, i64 2, i64 1
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%25 = load double* %arrayidx196.i, align 8
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%mul199.i = fmul double %3, %25
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%add200.i = fadd double %mul194.i, %mul199.i
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%arrayidx202.i = getelementptr inbounds [4 x double]* %A, i64 2, i64 2
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%26 = load double* %arrayidx202.i, align 8
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%mul205.i = fmul double %5, %26
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%add206.i = fadd double %add200.i, %mul205.i
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%arrayidx208.i = getelementptr inbounds [4 x double]* %A, i64 2, i64 3
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%27 = load double* %arrayidx208.i, align 8
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%mul211.i = fmul double %7, %27
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%add212.i = fadd double %add206.i, %mul211.i
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%mul218.i = fmul double %8, %24
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%mul223.i = fmul double %9, %25
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%add224.i = fadd double %mul218.i, %mul223.i
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%mul229.i = fmul double %10, %26
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%add230.i = fadd double %add224.i, %mul229.i
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%mul235.i = fmul double %11, %27
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%add236.i = fadd double %add230.i, %mul235.i
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%mul242.i = fmul double %12, %24
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%mul247.i = fmul double %13, %25
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%add248.i = fadd double %mul242.i, %mul247.i
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%mul253.i = fmul double %14, %26
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%add254.i = fadd double %add248.i, %mul253.i
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%mul259.i = fmul double %15, %27
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%add260.i = fadd double %add254.i, %mul259.i
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%mul266.i = fmul double %16, %24
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%mul271.i = fmul double %17, %25
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%add272.i = fadd double %mul266.i, %mul271.i
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%mul277.i = fmul double %18, %26
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%add278.i = fadd double %add272.i, %mul277.i
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%mul283.i = fmul double %19, %27
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%add284.i = fadd double %add278.i, %mul283.i
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%arrayidx287.i = getelementptr inbounds [4 x double]* %A, i64 3, i64 0
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%28 = load double* %arrayidx287.i, align 8
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%mul290.i = fmul double %1, %28
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%arrayidx292.i = getelementptr inbounds [4 x double]* %A, i64 3, i64 1
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%29 = load double* %arrayidx292.i, align 8
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%mul295.i = fmul double %3, %29
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%add296.i = fadd double %mul290.i, %mul295.i
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%arrayidx298.i = getelementptr inbounds [4 x double]* %A, i64 3, i64 2
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%30 = load double* %arrayidx298.i, align 8
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%mul301.i = fmul double %5, %30
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%add302.i = fadd double %add296.i, %mul301.i
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%arrayidx304.i = getelementptr inbounds [4 x double]* %A, i64 3, i64 3
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%31 = load double* %arrayidx304.i, align 8
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%mul307.i = fmul double %7, %31
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%add308.i = fadd double %add302.i, %mul307.i
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%mul314.i = fmul double %8, %28
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%mul319.i = fmul double %9, %29
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%add320.i = fadd double %mul314.i, %mul319.i
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%mul325.i = fmul double %10, %30
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%add326.i = fadd double %add320.i, %mul325.i
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%mul331.i = fmul double %11, %31
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%add332.i = fadd double %add326.i, %mul331.i
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%mul338.i = fmul double %12, %28
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%mul343.i = fmul double %13, %29
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%add344.i = fadd double %mul338.i, %mul343.i
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%mul349.i = fmul double %14, %30
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%add350.i = fadd double %add344.i, %mul349.i
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%mul355.i = fmul double %15, %31
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%add356.i = fadd double %add350.i, %mul355.i
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%mul362.i = fmul double %16, %28
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%mul367.i = fmul double %17, %29
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%add368.i = fadd double %mul362.i, %mul367.i
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%mul373.i = fmul double %18, %30
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%add374.i = fadd double %add368.i, %mul373.i
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%mul379.i = fmul double %19, %31
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%add380.i = fadd double %add374.i, %mul379.i
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store double %add20.i, double* %Out, align 8
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%Res.i.sroa.1.8.idx2 = getelementptr inbounds double* %Out, i64 1
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store double %add44.i, double* %Res.i.sroa.1.8.idx2, align 8
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%Res.i.sroa.2.16.idx4 = getelementptr inbounds double* %Out, i64 2
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store double %add68.i, double* %Res.i.sroa.2.16.idx4, align 8
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%Res.i.sroa.3.24.idx6 = getelementptr inbounds double* %Out, i64 3
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store double %add92.i, double* %Res.i.sroa.3.24.idx6, align 8
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%Res.i.sroa.4.32.idx8 = getelementptr inbounds double* %Out, i64 4
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store double %add116.i, double* %Res.i.sroa.4.32.idx8, align 8
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%Res.i.sroa.5.40.idx10 = getelementptr inbounds double* %Out, i64 5
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store double %add140.i, double* %Res.i.sroa.5.40.idx10, align 8
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%Res.i.sroa.6.48.idx12 = getelementptr inbounds double* %Out, i64 6
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store double %add164.i, double* %Res.i.sroa.6.48.idx12, align 8
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%Res.i.sroa.7.56.idx14 = getelementptr inbounds double* %Out, i64 7
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store double %add188.i, double* %Res.i.sroa.7.56.idx14, align 8
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%Res.i.sroa.8.64.idx16 = getelementptr inbounds double* %Out, i64 8
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store double %add212.i, double* %Res.i.sroa.8.64.idx16, align 8
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%Res.i.sroa.9.72.idx18 = getelementptr inbounds double* %Out, i64 9
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store double %add236.i, double* %Res.i.sroa.9.72.idx18, align 8
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%Res.i.sroa.10.80.idx20 = getelementptr inbounds double* %Out, i64 10
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store double %add260.i, double* %Res.i.sroa.10.80.idx20, align 8
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%Res.i.sroa.11.88.idx22 = getelementptr inbounds double* %Out, i64 11
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store double %add284.i, double* %Res.i.sroa.11.88.idx22, align 8
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%Res.i.sroa.12.96.idx24 = getelementptr inbounds double* %Out, i64 12
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store double %add308.i, double* %Res.i.sroa.12.96.idx24, align 8
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%Res.i.sroa.13.104.idx26 = getelementptr inbounds double* %Out, i64 13
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store double %add332.i, double* %Res.i.sroa.13.104.idx26, align 8
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%Res.i.sroa.14.112.idx28 = getelementptr inbounds double* %Out, i64 14
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store double %add356.i, double* %Res.i.sroa.14.112.idx28, align 8
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%Res.i.sroa.15.120.idx30 = getelementptr inbounds double* %Out, i64 15
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store double %add380.i, double* %Res.i.sroa.15.120.idx30, align 8
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ret void
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}
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attributes #0 = { noinline nounwind ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "unsafe-fp-math"="false" "use-soft-float"="false" }
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