nuudlman/llvm: llvm/test/Transforms/InstCombine/call-guard.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -instcombine-infinite-loop-threshold=2 -S | FileCheck %s
; RUN: opt < %s -instcombine -S -debugify-each | FileCheck %s
; RUN: opt < %s -passes=instcombine -S -debugify-each | FileCheck %s

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

define void @test_guard_adjacent_same_cond(i1 %A) {
; CHECK-LABEL: @test_guard_adjacent_same_cond(
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[A:%.*]]) [ "deopt"() ]
; CHECK-NEXT:    ret void
;
  call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
  call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
  call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
  call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
  call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
  call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
  call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
  call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
  call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
  call void(i1, ...) @llvm.experimental.guard( i1 %A )[ "deopt"() ]
  ret void
}

define void @test_guard_adjacent_diff_cond(i1 %A, i1 %B, i1 %C) {
; CHECK-LABEL: @test_guard_adjacent_diff_cond(
; CHECK-NEXT:    [[TMP1:%.*]] = and i1 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = and i1 [[TMP1]], [[C:%.*]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 123) [ "deopt"() ]
; CHECK-NEXT:    ret void
;
  call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
  call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
  call void(i1, ...) @llvm.experimental.guard( i1 %C, i32 789 )[ "deopt"() ]
  ret void
}

; This version tests for the common form where the conditions are
; between the guards
define void @test_guard_adjacent_diff_cond2(i32 %V1, i32 %V2) {
; CHECK-LABEL: @test_guard_adjacent_diff_cond2(
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[V1:%.*]], [[V2:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 0
; CHECK-NEXT:    [[AND:%.*]] = and i32 [[V1]], 255
; CHECK-NEXT:    [[C:%.*]] = icmp ult i32 [[AND]], 129
; CHECK-NEXT:    [[TMP3:%.*]] = and i1 [[TMP2]], [[C]]
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP3]], i32 123) [ "deopt"() ]
; CHECK-NEXT:    ret void
;
  %A = icmp slt i32 %V1, 0
  call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
  %B = icmp slt i32 %V2, 0
  call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
  %and = and i32 %V1, 255
  %C = icmp sle i32 %and, 128
  call void(i1, ...) @llvm.experimental.guard( i1 %C, i32 789 )[ "deopt"() ]
  ret void
}

; Might not be legal to hoist the load above the first guard since the
; guard might control dereferenceability
define void @negative_load(i32 %V1, i32* %P) {
; CHECK-LABEL: @negative_load(
; CHECK-NEXT:    [[A:%.*]] = icmp slt i32 [[V1:%.*]], 0
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[A]], i32 123) [ "deopt"() ]
; CHECK-NEXT:    [[V2:%.*]] = load i32, i32* [[P:%.*]], align 4
; CHECK-NEXT:    [[B:%.*]] = icmp slt i32 [[V2]], 0
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[B]], i32 456) [ "deopt"() ]
; CHECK-NEXT:    ret void
;
  %A = icmp slt i32 %V1, 0
  call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
  %V2 = load i32, i32* %P
  %B = icmp slt i32 %V2, 0
  call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
  ret void
}

define void @deref_load(i32 %V1, i32* dereferenceable(4) align 4 %P) nofree nosync {
; CHECK-LABEL: @deref_load(
; CHECK-NEXT:    [[V2:%.*]] = load i32, i32* [[P:%.*]], align 4
; CHECK-NEXT:    [[TMP1:%.*]] = and i32 [[V2]], [[V1:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = icmp slt i32 [[TMP1]], 0
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[TMP2]], i32 123) [ "deopt"() ]
; CHECK-NEXT:    ret void
;
  %A = icmp slt i32 %V1, 0
  call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
  %V2 = load i32, i32* %P
  %B = icmp slt i32 %V2, 0
  call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
  ret void
}

; The divide might fault above the guard
define void @negative_div(i32 %V1, i32 %D) {
; CHECK-LABEL: @negative_div(
; CHECK-NEXT:    [[A:%.*]] = icmp slt i32 [[V1:%.*]], 0
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[A]], i32 123) [ "deopt"() ]
; CHECK-NEXT:    [[V2:%.*]] = udiv i32 [[V1]], [[D:%.*]]
; CHECK-NEXT:    [[B:%.*]] = icmp slt i32 [[V2]], 0
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[B]], i32 456) [ "deopt"() ]
; CHECK-NEXT:    ret void
;
  %A = icmp slt i32 %V1, 0
  call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
  %V2 = udiv i32 %V1, %D
  %B = icmp slt i32 %V2, 0
  call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
  ret void
}

; Highlight the limit of the window in a case which would otherwise be mergable
define void @negative_window(i32 %V1, i32 %a, i32 %b, i32 %c, i32 %d) {
; CHECK-LABEL: @negative_window(
; CHECK-NEXT:    [[A:%.*]] = icmp slt i32 [[V1:%.*]], 0
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[A]], i32 123) [ "deopt"() ]
; CHECK-NEXT:    [[V2:%.*]] = add i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT:    [[V3:%.*]] = add i32 [[V2]], [[C:%.*]]
; CHECK-NEXT:    [[V4:%.*]] = add i32 [[V3]], [[D:%.*]]
; CHECK-NEXT:    [[B:%.*]] = icmp slt i32 [[V4]], 0
; CHECK-NEXT:    call void (i1, ...) @llvm.experimental.guard(i1 [[B]], i32 456) [ "deopt"() ]
; CHECK-NEXT:    ret void
;
  %A = icmp slt i32 %V1, 0
  call void(i1, ...) @llvm.experimental.guard( i1 %A, i32 123 )[ "deopt"() ]
  %V2 = add i32 %a, %b
  %V3 = add i32 %V2, %c
  %V4 = add i32 %V3, %d
  %B = icmp slt i32 %V4, 0
  call void(i1, ...) @llvm.experimental.guard( i1 %B, i32 456 )[ "deopt"() ]
  ret void
}