a57fe210ff
When instructions are cloned from block BB to PredBB in the method DuplicateCondBranchOnPHIIntoPred() number of successors of PredBB changes from 1 to number of successors of BB. So we have to copy branch probabilities from BB to PredBB. Reviewed By: Kazu Hirata Differential Revision: https://reviews.llvm.org/D90841
30 lines
819 B
LLVM
30 lines
819 B
LLVM
; RUN: opt -debug-only=branch-prob -jump-threading -S %s 2>&1 | FileCheck %s
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; REQUIRES: asserts
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; Make sure that we set edge probabilities for bb2 as we
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; call DuplicateCondBranchOnPHIIntoPred(bb3, {bb2}).
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;
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; CHECK-LABEL: ---- Branch Probability Info : foo
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; CHECK: set edge bb2 -> 0 successor probability to 0x7fffffff / 0x80000000 = 100.00%
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; CHECK-NEXT: set edge bb2 -> 1 successor probability to 0x00000001 / 0x80000000 = 0.00%
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define void @foo(i1 %f0, i1 %f1, i1 %f2) !prof !{!"function_entry_count", i64 0} {
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; CHECK-LABEL: @foo(
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bb1:
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br i1 %f0, label %bb3, label %bb2
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bb2:
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; CHECK: bb2:
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; CHECK-NEXT: br i1 %f2, label %exit1, label %unreach
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br label %bb3
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bb3:
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%ph = phi i1 [ %f1, %bb1 ], [ %f2, %bb2 ]
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br i1 %ph, label %exit1, label %unreach
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exit1:
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ret void
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unreach:
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unreachable
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}
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