mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 20:23:11 +01:00
9e95dea61d
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. Differential Revision: https://reviews.llvm.org/D92608
23 lines
407 B
LLVM
23 lines
407 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 bb1 as we fold
|
|
; the conditional branch in it.
|
|
|
|
; CHECK: eraseBlock bb1
|
|
|
|
define i32 @foo() !prof !0 {
|
|
; CHECK-LABEL: @foo
|
|
bb1:
|
|
br i1 true, label %bb2, label %bb3
|
|
|
|
bb2:
|
|
ret i32 3
|
|
|
|
bb3:
|
|
; CHECK-NOT: bb3:
|
|
ret i32 7
|
|
}
|
|
|
|
!0 = !{!"function_entry_count", i64 0}
|