test/Transforms/MakeGuardsExplicit/basic.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -make-guards-explicit < %s        | FileCheck %s
; RUN: opt -S -passes=make-guards-explicit < %s | FileCheck %s

declare void @llvm.experimental.guard(i1,...)

; Check that a sole guard can be turned into explicit guards form.
define void @trivial_guard(i1 %cond) {
; CHECK-LABEL: @trivial_guard(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[WIDENABLE_COND:%.*]] = call i1 @llvm.experimental.widenable.condition()
; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND:%.*]] = and i1 [[COND:%.*]], [[WIDENABLE_COND]]
; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED:%.*]], label [[DEOPT:%.*]], !prof !0
; CHECK:       deopt:
; CHECK-NEXT:    call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"(i32 123, i64 456) ]
; CHECK-NEXT:    ret void
; CHECK:       guarded:
; CHECK-NEXT:    ret void
;
entry:
  call void(i1, ...) @llvm.experimental.guard(i1 %cond) [ "deopt"(i32 123, i64 456) ]
  ret void
}

; Check that a sequence of guards can be turned into explicit guards form.
define void @trivial_guard_sequence(i1 %cond1, i1 %cond2, i1 %cond3) {
; CHECK-LABEL: @trivial_guard_sequence(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[WIDENABLE_COND:%.*]] = call i1 @llvm.experimental.widenable.condition()
; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND:%.*]] = and i1 [[COND1:%.*]], [[WIDENABLE_COND]]
; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED:%.*]], label [[DEOPT:%.*]], !prof !0
; CHECK:       deopt:
; CHECK-NEXT:    call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"(i32 123, i64 456) ]
; CHECK-NEXT:    ret void
; CHECK:       guarded:
; CHECK-NEXT:    [[WIDENABLE_COND3:%.*]] = call i1 @llvm.experimental.widenable.condition()
; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND4:%.*]] = and i1 [[COND2:%.*]], [[WIDENABLE_COND3]]
; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND4]], label [[GUARDED1:%.*]], label [[DEOPT2:%.*]], !prof !0
; CHECK:       deopt2:
; CHECK-NEXT:    call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"(i32 789, i64 123) ]
; CHECK-NEXT:    ret void
; CHECK:       guarded1:
; CHECK-NEXT:    [[WIDENABLE_COND7:%.*]] = call i1 @llvm.experimental.widenable.condition()
; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND8:%.*]] = and i1 [[COND3:%.*]], [[WIDENABLE_COND7]]
; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND8]], label [[GUARDED5:%.*]], label [[DEOPT6:%.*]], !prof !0
; CHECK:       deopt6:
; CHECK-NEXT:    call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"(i32 456, i64 789) ]
; CHECK-NEXT:    ret void
; CHECK:       guarded5:
; CHECK-NEXT:    ret void
;
entry:
  call void(i1, ...) @llvm.experimental.guard(i1 %cond1) [ "deopt"(i32 123, i64 456) ]
  call void(i1, ...) @llvm.experimental.guard(i1 %cond2) [ "deopt"(i32 789, i64 123) ]
  call void(i1, ...) @llvm.experimental.guard(i1 %cond3) [ "deopt"(i32 456, i64 789) ]
  ret void
}

; Check that all instructions between the guards preserve.
define void @split_block_contents(i1 %cond1, i1 %cond2, i1 %cond3, i32* %p) {
; CHECK-LABEL: @split_block_contents(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    store i32 0, i32* [[P:%.*]]
; CHECK-NEXT:    [[WIDENABLE_COND:%.*]] = call i1 @llvm.experimental.widenable.condition()
; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND:%.*]] = and i1 [[COND1:%.*]], [[WIDENABLE_COND]]
; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED:%.*]], label [[DEOPT:%.*]], !prof !0
; CHECK:       deopt:
; CHECK-NEXT:    call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"(i32 123, i64 456) ]
; CHECK-NEXT:    ret void
; CHECK:       guarded:
; CHECK-NEXT:    store i32 1, i32* [[P]]
; CHECK-NEXT:    [[WIDENABLE_COND3:%.*]] = call i1 @llvm.experimental.widenable.condition()
; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND4:%.*]] = and i1 [[COND2:%.*]], [[WIDENABLE_COND3]]
; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND4]], label [[GUARDED1:%.*]], label [[DEOPT2:%.*]], !prof !0
; CHECK:       deopt2:
; CHECK-NEXT:    call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"(i32 789, i64 123) ]
; CHECK-NEXT:    ret void
; CHECK:       guarded1:
; CHECK-NEXT:    store i32 2, i32* [[P]]
; CHECK-NEXT:    [[WIDENABLE_COND7:%.*]] = call i1 @llvm.experimental.widenable.condition()
; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND8:%.*]] = and i1 [[COND3:%.*]], [[WIDENABLE_COND7]]
; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND8]], label [[GUARDED5:%.*]], label [[DEOPT6:%.*]], !prof !0
; CHECK:       deopt6:
; CHECK-NEXT:    call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"(i32 456, i64 789) ]
; CHECK-NEXT:    ret void
; CHECK:       guarded5:
; CHECK-NEXT:    store i32 3, i32* [[P]]
; CHECK-NEXT:    ret void
;
entry:
  store i32 0, i32* %p
  call void(i1, ...) @llvm.experimental.guard(i1 %cond1) [ "deopt"(i32 123, i64 456) ]
  store i32 1, i32* %p
  call void(i1, ...) @llvm.experimental.guard(i1 %cond2) [ "deopt"(i32 789, i64 123) ]
  store i32 2, i32* %p
  call void(i1, ...) @llvm.experimental.guard(i1 %cond3) [ "deopt"(i32 456, i64 789) ]
  store i32 3, i32* %p
  ret void
}

; Check that the guard can split a loop properly.
define void @split_loop(i1 %cond, i32 %N, i32 %M) {
; CHECK-LABEL: @split_loop(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[GUARDED:%.*]] ]
; CHECK-NEXT:    [[GUARD_COND:%.*]] = icmp slt i32 [[IV]], [[N:%.*]]
; CHECK-NEXT:    [[WIDENABLE_COND:%.*]] = call i1 @llvm.experimental.widenable.condition()
; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND:%.*]] = and i1 [[GUARD_COND]], [[WIDENABLE_COND]]
; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED]], label [[DEOPT:%.*]], !prof !0
; CHECK:       deopt:
; CHECK-NEXT:    call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"(i32 123, i64 456) ]
; CHECK-NEXT:    ret void
; CHECK:       guarded:
; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp slt i32 [[IV]], [[M:%.*]]
; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], 1
; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %guard_cond = icmp slt i32 %iv, %N
  call void(i1, ...) @llvm.experimental.guard(i1 %guard_cond) [ "deopt"(i32 123, i64 456) ]
  %loop_cond = icmp slt i32 %iv, %M
  %iv.next = add i32 %iv, 1
  br i1 %loop_cond, label %loop, label %exit

exit:
  ret void
}