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b5f7b0f978
Although you can't generate this from C on PPC64, if you have a loop using a 64-bit counter on PPC32 then you can't form a CTR-based loop for it. This had been cauing the PPCCTRLoops pass to assert. Thanks to Joerg Sonnenberger for providing a test case! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185361 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
719 B
LLVM
24 lines
719 B
LLVM
; RUN: llc -mcpu=ppc32 < %s
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target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32"
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target triple = "powerpc-unknown-linux-gnu"
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define void @fn1() {
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entry:
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br i1 undef, label %for.end, label %for.body
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for.body: ; preds = %for.body, %entry
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%inc3 = phi i64 [ %inc, %for.body ], [ undef, %entry ]
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%inc = add nsw i64 %inc3, 1
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%tobool = icmp eq i64 %inc, 0
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br i1 %tobool, label %for.end, label %for.body
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for.end: ; preds = %for.body, %entry
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ret void
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}
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; On PPC32, CTR is also 32 bits, and so cannot hold a 64-bit count.
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; CHECK: @fn1
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; CHECK-NOT: mtctr
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; CHECK: blr
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