llvm/test/Transforms/SimplifyCFG/branch-fold-test.ll


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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; This test ensures that the simplifycfg pass continues to constant fold
; terminator instructions.

; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s

define i32 @test(i32 %A, i32 %B) {
; CHECK-LABEL: @test(
; CHECK-NEXT:  J:
; CHECK-NEXT:    [[C:%.*]] = add i32 [[A:%.*]], 12
; CHECK-NEXT:    [[D:%.*]] = add i32 [[C]], [[B:%.*]]
; CHECK-NEXT:    ret i32 [[D]]
;
J:
  %C = add i32 %A, 12             ; <i32> [#uses=2]
  br i1 true, label %L, label %K
L:              ; preds = %J
  %D = add i32 %C, %B             ; <i32> [#uses=1]
  ret i32 %D
K:              ; preds = %J
  %E = add i32 %C, %B             ; <i32> [#uses=1]
  ret i32 %E
}