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https://github.com/c64scene-ar/llvm-6502.git
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014b06e7b2
The aggressive anti-dep breaker, used by the PowerPC backend during post-RA scheduling (but is available to all targets), did not handle early-clobber MI operands (at all). When constructing the list of available registers for the replacement of some def operand, check the using instructions, and remove registers assigned to early-clobbered defs from the set. Fixes PR21452. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223727 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
1.9 KiB
LLVM
48 lines
1.9 KiB
LLVM
; RUN: llc -mcpu=pwr7 < %s | FileCheck %s
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target datalayout = "E-m:e-i64:64-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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%struct.inode.0.12.120 = type { i8* }
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%struct.kstat2.1.13.121 = type { i32 }
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%struct.task_struct.4.16.124 = type { i8*, %struct.atomic_t.2.14.122, %struct.signal_struct.3.15.123* }
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%struct.atomic_t.2.14.122 = type { i32 }
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%struct.signal_struct.3.15.123 = type { i64 }
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%struct.pid.5.17.125 = type { i8* }
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; Function Attrs: nounwind
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define signext i32 @proc_task_getattr(%struct.inode.0.12.120* nocapture readonly %inode, %struct.kstat2.1.13.121* nocapture %stat) #0 {
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entry:
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%call1.i = tail call %struct.task_struct.4.16.124* @get_pid_task(%struct.pid.5.17.125* undef, i32 zeroext 0) #0
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br i1 undef, label %if.end, label %if.then
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if.then: ; preds = %entry
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%0 = load i64* undef, align 8
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%conv.i = trunc i64 %0 to i32
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%1 = load i32* null, align 4
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%add = add i32 %1, %conv.i
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store i32 %add, i32* null, align 4
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%counter.i.i = getelementptr inbounds %struct.task_struct.4.16.124* %call1.i, i64 0, i32 1, i32 0
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%2 = tail call i32 asm sideeffect "\09lwsync\0A1:\09lwarx\09$0,0,$1\09\09# atomic_dec_return\0A\09addic\09$0,$0,-1\0A\09stwcx.\09$0,0,$1\0A\09bne-\091b\0A\09sync\0A", "=&r,r,~{cr0},~{xer},~{memory}"(i32* %counter.i.i) #0
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%cmp.i = icmp eq i32 %2, 0
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br i1 %cmp.i, label %if.then.i, label %if.end
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; CHECK-LABEL: @proc_task_getattr
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; CHECK-NOT: stwcx. [[REG:[0-9]+]],0,[[REG]]
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; CHECK: blr
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if.then.i: ; preds = %if.then
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%3 = bitcast %struct.task_struct.4.16.124* %call1.i to i8*
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tail call void @foo(i8* %3) #0
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unreachable
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if.end: ; preds = %if.then, %entry
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ret i32 0
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}
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declare void @foo(i8*)
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declare %struct.task_struct.4.16.124* @get_pid_task(%struct.pid.5.17.125*, i32 zeroext)
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attributes #0 = { nounwind }
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