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https://github.com/c64scene-ar/llvm-6502.git
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091acf253b
On PowerPC, which has a full set of logical operations on (its multiple sets of) condition-register bits, it is not profitable to break of complex conditions feeding a jump into multiple jumps. We can turn off this feature of CGP/SDAGBuilder by marking jumps as "expensive". P7 test-suite speedups (no regressions): MultiSource/Benchmarks/FreeBench/pcompress2/pcompress2 -0.626647% +/- 0.323583% MultiSource/Benchmarks/Olden/power/power -18.2821% +/- 8.06481% git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228895 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
902 B
LLVM
37 lines
902 B
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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; Function Attrs: nounwind
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define void @foo(i32 signext %a, i32 signext %b) #0 {
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entry:
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%cmp = icmp sgt i32 %a, 5
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%cmp1 = icmp slt i32 %b, 3
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%or.cond = or i1 %cmp, %cmp1
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br i1 %or.cond, label %if.then, label %if.else
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; CHECK-LABEL: @foo
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; CHECK: cmpwi
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; CHECK: cmpwi
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; CHECK: cror
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; CHECK: blr
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if.then: ; preds = %entry
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tail call void bitcast (void (...)* @bar to void ()*)() #0
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br label %if.end
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if.else: ; preds = %entry
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tail call void bitcast (void (...)* @car to void ()*)() #0
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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ret void
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}
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declare void @bar(...)
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declare void @car(...)
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attributes #0 = { nounwind }
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