llvm/test/Transforms/NewGVN/pr32952.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; PR32952: Don't erroneously consider congruent two phi nodes which
; have the same arguments but different incoming edges.
; RUN: opt -passes=newgvn -S %s | FileCheck %s

@a = common global i16 0, align 2
@.str = private unnamed_addr constant [4 x i8] c"%d\0A\00", align 1

define i32 @tinkywinky() {
; CHECK-LABEL: define i32 @tinkywinky() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[TMP0:%.*]] = load i16, ptr @a, align 2
; CHECK-NEXT:    [[CONV:%.*]] = sext i16 [[TMP0]] to i32
; CHECK-NEXT:    [[NEG:%.*]] = xor i32 [[CONV]], -1
; CHECK-NEXT:    [[CONV1:%.*]] = trunc i32 [[NEG]] to i16
; CHECK-NEXT:    [[CONV3:%.*]] = zext i16 [[CONV1]] to i32
; CHECK-NEXT:    [[CMP:%.*]] = icmp slt i32 [[CONV]], [[CONV3]]
; CHECK-NEXT:    br i1 [[CMP]], label [[TINKY:%.*]], label [[WINKY:%.*]]
; CHECK:       tinky:
; CHECK-NEXT:    store i16 2, ptr @a, align 2
; CHECK-NEXT:    br label [[PATATINO:%.*]]
; CHECK:       winky:
; CHECK-NEXT:    br label [[PATATINO]]
; CHECK:       patatino:
; CHECK-NEXT:    [[MEH:%.*]] = phi i16 [ [[TMP0]], [[WINKY]] ], [ [[CONV1]], [[TINKY]] ]
; CHECK-NEXT:    [[BANANA:%.*]] = phi i16 [ [[TMP0]], [[TINKY]] ], [ [[CONV1]], [[WINKY]] ]
; CHECK-NEXT:    br label [[END:%.*]]
; CHECK:       end:
; CHECK-NEXT:    [[PROMOTED:%.*]] = zext i16 [[BANANA]] to i32
; CHECK-NEXT:    [[OTHER:%.*]] = zext i16 [[MEH]] to i32
; CHECK-NEXT:    [[FIRST:%.*]] = tail call i32 (ptr, ...) @printf(ptr @.str, i32 [[PROMOTED]])
; CHECK-NEXT:    [[SECOND:%.*]] = tail call i32 (ptr, ...) @printf(ptr @.str, i32 [[OTHER]])
; CHECK-NEXT:    ret i32 0
;
entry:
  %0 = load i16, ptr @a, align 2
  %conv = sext i16 %0 to i32
  %neg = xor i32 %conv, -1
  %conv1 = trunc i32 %neg to i16
  %conv3 = zext i16 %conv1 to i32
  %cmp = icmp slt i32 %conv, %conv3
  br i1 %cmp, label %tinky, label %winky

tinky:
  store i16 2, ptr @a, align 2
  br label %patatino

winky:
  br label %patatino

patatino:
  %meh = phi i16 [ %0, %winky ], [ %conv1, %tinky ]
  %banana = phi i16 [ %0, %tinky ], [ %conv1, %winky ]
  br label %end

end:
  %promoted = zext i16 %banana to i32
  %other = zext i16 %meh to i32
  %first = tail call i32 (ptr, ...) @printf(ptr @.str, i32 %promoted)
  %second = tail call i32 (ptr, ...) @printf(ptr @.str, i32 %other)
  ret i32 0
}

declare i32 @printf(ptr, ...)