derek.holloway
7502bf64a4
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36 lines
1.1 KiB
LLVM
36 lines
1.1 KiB
LLVM
; RUN: llc -mtriple=x86_64-linux-gnu %s -stop-after=finalize-isel -o - | \
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; RUN: llc -mtriple=x86_64-linux-gnu -passes='print<machine-branch-prob>' -x mir -filetype=null 2>&1 | \
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; RUN: FileCheck %s
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declare void @foo()
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define i32 @test2(i32 %x) nounwind uwtable readnone ssp {
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entry:
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%conv = sext i32 %x to i64
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switch i64 %conv, label %return [
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i64 0, label %sw.bb
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i64 1, label %sw.bb
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i64 4, label %sw.bb
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i64 5, label %sw.bb1
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i64 15, label %sw.bb
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], !prof !0
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sw.bb:
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; this call will prevent simplifyCFG from optimizing the block away in ARM/AArch64.
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tail call void @foo()
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br label %return
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sw.bb1:
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br label %return
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return:
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%retval.0 = phi i32 [ 5, %sw.bb1 ], [ 1, %sw.bb ], [ 0, %entry ]
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ret i32 %retval.0
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}
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!0 = !{!"branch_weights", i32 7, i32 6, i32 4, i32 4, i32 64, i21 1000}
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; CHECK: Printing analysis 'Machine Branch Probability Analysis' for machine function 'test2':
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; CHECK: edge %bb.4 -> %bb.6 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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; CHECK: edge %bb.5 -> %bb.6 probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
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