147ccc848a
This patch teaches the jump threading pass to call BPI->eraseBlock when it folds a conditional branch. Without this patch, BranchProbabilityInfo could end up with stale edge probabilities for the basic block containing the conditional branch -- one edge probability with less than 1.0 and the other for a removed edge. This patch is one of the steps before we can safely re-apply D91017. Differential Revision: https://reviews.llvm.org/D91511
28 lines
570 B
LLVM
28 lines
570 B
LLVM
; RUN: opt -debug-only=branch-prob -jump-threading -S %s 2>&1 | FileCheck %s
|
|
; REQUIRES: asserts
|
|
|
|
; Make sure that we clear edge probabilities for bb.cond as we fold
|
|
; the conditional branch in it.
|
|
|
|
; CHECK: eraseBlock bb.cond
|
|
|
|
define i32 @foo(i1 %cond) !prof !0 {
|
|
; CHECK-LABEL: @foo
|
|
; CHECK: bb.entry:
|
|
; CHECK-NEXT: br i1 %cond, label %bb.31, label %bb.12
|
|
; CHECK-NOT: bb.cond:
|
|
bb.entry:
|
|
br i1 %cond, label %bb.31, label %bb.cond
|
|
|
|
bb.cond:
|
|
br i1 %cond, label %bb.31, label %bb.12
|
|
|
|
bb.31:
|
|
ret i32 31
|
|
|
|
bb.12:
|
|
ret i32 12
|
|
}
|
|
|
|
!0 = !{!"function_entry_count", i64 0}
|