xref: /llvm-project/llvm/test/Transforms/MergeFunc/cfi-thunk-merging.ll (revision a9d4ddd98a0bc495126027122fdca751b6841ceb)

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --include-generated-funcs --version 2
;; Check the cases involving internal CFI instrumented functions where we do not expect functions to be merged.
; RUN: opt -S -passes=mergefunc < %s | FileCheck %s
; RUN: opt -S -passes=mergefunc,lowertypetests < %s | FileCheck --check-prefix=LOWERTYPETESTS %s

target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux"

@0 = private unnamed_addr constant { i16, i16, [12 x i8] } { i16 -1, i16 0, [12 x i8] c"'int (int)'\00" }

; Function Attrs: noinline nounwind optnone
define dso_local i32 @f(i32 noundef %arg) #0 !type !3 !type !4 {
entry:
  %arg.addr = alloca i32, align 4
  %a = alloca i32, align 4
  %b = alloca i32, align 4
  store i32 %arg, ptr %arg.addr, align 4
  store i32 0, ptr %b, align 4
  %0 = load i32, ptr %arg.addr, align 4
  %cmp = icmp sgt i32 %0, 0
  br i1 %cmp, label %if.then, label %if.end

if.then:                                          ; preds = %entry
  store i32 1, ptr %a, align 4
  br label %if.end

if.end:                                           ; preds = %if.then, %entry
  %1 = load i32, ptr %a, align 4
  %2 = load i32, ptr %b, align 4
  %add = add nsw i32 %1, %2
  ret i32 %add
}

; Function Attrs: noinline nounwind optnone
define dso_local i32 @f_thunk(i32 noundef %arg) #0 !type !3 !type !4 {
entry:
  %arg.addr = alloca i32, align 4
  %a = alloca i32, align 4
  %b = alloca i32, align 4
  store i32 %arg, ptr %arg.addr, align 4
  store i32 0, ptr %b, align 4
  %0 = load i32, ptr %arg.addr, align 4
  %cmp = icmp sgt i32 %0, 0
  br i1 %cmp, label %if.then, label %if.end

if.then:                                          ; preds = %entry
  store i32 1, ptr %a, align 4
  br label %if.end

if.end:                                           ; preds = %if.then, %entry
  %1 = load i32, ptr %a, align 4
  %2 = load i32, ptr %b, align 4
  %add = add nsw i32 %1, %2
  ret i32 %add
}

; Function Attrs: noinline nounwind optnone
define dso_local i32 @g(i32 noundef %b) #0 !type !3 !type !4 {
entry:
  %b.addr = alloca i32, align 4
  %fp = alloca ptr, align 8
  store i32 %b, ptr %b.addr, align 4
  %0 = load i32, ptr %b.addr, align 4
  %tobool = icmp ne i32 %0, 0
  %1 = zext i1 %tobool to i64
  %cond = select i1 %tobool, ptr @f, ptr @f_thunk
  store ptr %cond, ptr %fp, align 8
  %2 = load ptr, ptr %fp, align 8
  %3 = call i1 @llvm.type.test(ptr %2, metadata !"_ZTSFiiE"), !nosanitize !5
  br i1 %3, label %cont, label %trap, !nosanitize !5

trap:                                             ; preds = %entry
  call void @llvm.ubsantrap(i8 2) #3, !nosanitize !5
  unreachable, !nosanitize !5

cont:                                             ; preds = %entry
  %4 = load i32, ptr %b.addr, align 4
  %call = call i32 %2(i32 noundef %4)
  ret i32 %call
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i1 @llvm.type.test(ptr, metadata) #1

; Function Attrs: cold noreturn nounwind
declare void @llvm.ubsantrap(i8 immarg) #2

attributes #0 = { noinline nounwind optnone "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+cx8,+mmx,+sse,+sse2,+x87" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { cold noreturn nounwind }
attributes #3 = { noreturn nounwind }

!llvm.module.flags = !{!0, !1}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 4, !"CFI Canonical Jump Tables", i32 0}
!3 = !{i64 0, !"_ZTSFiiE"}
!4 = !{i64 0, !"_ZTSFiiE.generalized"}
!5 = !{}
; CHECK-LABEL: define dso_local i32 @f
; CHECK-SAME: (i32 noundef [[ARG:%.*]]) #[[ATTR0:[0-9]+]] !type [[META2:![0-9]+]] !type [[META3:![0-9]+]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[ARG_ADDR:%.*]] = alloca i32, align 4
; CHECK-NEXT:    [[A:%.*]] = alloca i32, align 4
; CHECK-NEXT:    [[B:%.*]] = alloca i32, align 4
; CHECK-NEXT:    store i32 [[ARG]], ptr [[ARG_ADDR]], align 4
; CHECK-NEXT:    store i32 0, ptr [[B]], align 4
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARG_ADDR]], align 4
; CHECK-NEXT:    [[CMP:%.*]] = icmp sgt i32 [[TMP0]], 0
; CHECK-NEXT:    br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; CHECK:       if.then:
; CHECK-NEXT:    store i32 1, ptr [[A]], align 4
; CHECK-NEXT:    br label [[IF_END]]
; CHECK:       if.end:
; CHECK-NEXT:    [[TMP1:%.*]] = load i32, ptr [[A]], align 4
; CHECK-NEXT:    [[TMP2:%.*]] = load i32, ptr [[B]], align 4
; CHECK-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP1]], [[TMP2]]
; CHECK-NEXT:    ret i32 [[ADD]]
;
;
; CHECK-LABEL: define dso_local i32 @g
; CHECK-SAME: (i32 noundef [[B:%.*]]) #[[ATTR0]] !type [[META2]] !type [[META3]] {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[B_ADDR:%.*]] = alloca i32, align 4
; CHECK-NEXT:    [[FP:%.*]] = alloca ptr, align 8
; CHECK-NEXT:    store i32 [[B]], ptr [[B_ADDR]], align 4
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[B_ADDR]], align 4
; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp ne i32 [[TMP0]], 0
; CHECK-NEXT:    [[TMP1:%.*]] = zext i1 [[TOBOOL]] to i64
; CHECK-NEXT:    [[COND:%.*]] = select i1 [[TOBOOL]], ptr @f, ptr @f_thunk
; CHECK-NEXT:    store ptr [[COND]], ptr [[FP]], align 8
; CHECK-NEXT:    [[TMP2:%.*]] = load ptr, ptr [[FP]], align 8
; CHECK-NEXT:    [[TMP3:%.*]] = call i1 @llvm.type.test(ptr [[TMP2]], metadata !"_ZTSFiiE"), !nosanitize [[META4:![0-9]+]]
; CHECK-NEXT:    br i1 [[TMP3]], label [[CONT:%.*]], label [[TRAP:%.*]], !nosanitize [[META4]]
; CHECK:       trap:
; CHECK-NEXT:    call void @llvm.ubsantrap(i8 2) #[[ATTR3:[0-9]+]], !nosanitize [[META4]]
; CHECK-NEXT:    unreachable, !nosanitize [[META4]]
; CHECK:       cont:
; CHECK-NEXT:    [[TMP4:%.*]] = load i32, ptr [[B_ADDR]], align 4
; CHECK-NEXT:    [[CALL:%.*]] = call i32 [[TMP2]](i32 noundef [[TMP4]])
; CHECK-NEXT:    ret i32 [[CALL]]
;
;
; CHECK-LABEL: define dso_local i32 @f_thunk
; CHECK-SAME: (i32 noundef [[TMP0:%.*]]) #[[ATTR0]] !type [[META2]] !type [[META3]] {
; CHECK-NEXT:    [[TMP2:%.*]] = tail call i32 @f(i32 noundef [[TMP0]]) #[[ATTR0]]
; CHECK-NEXT:    ret i32 [[TMP2]]
;
;
; LOWERTYPETESTS-LABEL: define dso_local i32 @f
; LOWERTYPETESTS-SAME: (i32 noundef [[ARG:%.*]]) #[[ATTR0:[0-9]+]] !type [[META2:![0-9]+]] !type [[META3:![0-9]+]] {
; LOWERTYPETESTS-NEXT:  entry:
; LOWERTYPETESTS-NEXT:    [[ARG_ADDR:%.*]] = alloca i32, align 4
; LOWERTYPETESTS-NEXT:    [[A:%.*]] = alloca i32, align 4
; LOWERTYPETESTS-NEXT:    [[B:%.*]] = alloca i32, align 4
; LOWERTYPETESTS-NEXT:    store i32 [[ARG]], ptr [[ARG_ADDR]], align 4
; LOWERTYPETESTS-NEXT:    store i32 0, ptr [[B]], align 4
; LOWERTYPETESTS-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARG_ADDR]], align 4
; LOWERTYPETESTS-NEXT:    [[CMP:%.*]] = icmp sgt i32 [[TMP0]], 0
; LOWERTYPETESTS-NEXT:    br i1 [[CMP]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
; LOWERTYPETESTS:       if.then:
; LOWERTYPETESTS-NEXT:    store i32 1, ptr [[A]], align 4
; LOWERTYPETESTS-NEXT:    br label [[IF_END]]
; LOWERTYPETESTS:       if.end:
; LOWERTYPETESTS-NEXT:    [[TMP1:%.*]] = load i32, ptr [[A]], align 4
; LOWERTYPETESTS-NEXT:    [[TMP2:%.*]] = load i32, ptr [[B]], align 4
; LOWERTYPETESTS-NEXT:    [[ADD:%.*]] = add nsw i32 [[TMP1]], [[TMP2]]
; LOWERTYPETESTS-NEXT:    ret i32 [[ADD]]
;
;
; LOWERTYPETESTS-LABEL: define dso_local i32 @g
; LOWERTYPETESTS-SAME: (i32 noundef [[B:%.*]]) #[[ATTR0]] !type [[META2]] !type [[META3]] {
; LOWERTYPETESTS-NEXT:  entry:
; LOWERTYPETESTS-NEXT:    [[B_ADDR:%.*]] = alloca i32, align 4
; LOWERTYPETESTS-NEXT:    [[FP:%.*]] = alloca ptr, align 8
; LOWERTYPETESTS-NEXT:    store i32 [[B]], ptr [[B_ADDR]], align 4
; LOWERTYPETESTS-NEXT:    [[TMP0:%.*]] = load i32, ptr [[B_ADDR]], align 4
; LOWERTYPETESTS-NEXT:    [[TOBOOL:%.*]] = icmp ne i32 [[TMP0]], 0
; LOWERTYPETESTS-NEXT:    [[TMP1:%.*]] = zext i1 [[TOBOOL]] to i64
; LOWERTYPETESTS-NEXT:    [[COND:%.*]] = select i1 [[TOBOOL]], ptr @.cfi.jumptable, ptr getelementptr inbounds ([2 x [8 x i8]], ptr @.cfi.jumptable, i64 0, i64 1)
; LOWERTYPETESTS-NEXT:    store ptr [[COND]], ptr [[FP]], align 8
; LOWERTYPETESTS-NEXT:    [[TMP2:%.*]] = load ptr, ptr [[FP]], align 8
; LOWERTYPETESTS-NEXT:    [[TMP3:%.*]] = ptrtoint ptr [[TMP2]] to i64
; LOWERTYPETESTS-NEXT:    [[TMP4:%.*]] = sub i64 [[TMP3]], ptrtoint (ptr @.cfi.jumptable to i64)
; LOWERTYPETESTS-NEXT:    [[TMP5:%.*]] = lshr i64 [[TMP4]], 3
; LOWERTYPETESTS-NEXT:    [[TMP6:%.*]] = shl i64 [[TMP4]], 61
; LOWERTYPETESTS-NEXT:    [[TMP7:%.*]] = or i64 [[TMP5]], [[TMP6]]
; LOWERTYPETESTS-NEXT:    [[TMP8:%.*]] = icmp ule i64 [[TMP7]], 1
; LOWERTYPETESTS-NEXT:    br i1 [[TMP8]], label [[CONT:%.*]], label [[TRAP:%.*]], !nosanitize [[META4:![0-9]+]]
; LOWERTYPETESTS:       trap:
; LOWERTYPETESTS-NEXT:    call void @llvm.ubsantrap(i8 2) #[[ATTR4:[0-9]+]], !nosanitize [[META4]]
; LOWERTYPETESTS-NEXT:    unreachable, !nosanitize [[META4]]
; LOWERTYPETESTS:       cont:
; LOWERTYPETESTS-NEXT:    [[TMP9:%.*]] = load i32, ptr [[B_ADDR]], align 4
; LOWERTYPETESTS-NEXT:    [[CALL:%.*]] = call i32 [[TMP2]](i32 noundef [[TMP9]])
; LOWERTYPETESTS-NEXT:    ret i32 [[CALL]]
;
;
; LOWERTYPETESTS-LABEL: define dso_local i32 @f_thunk
; LOWERTYPETESTS-SAME: (i32 noundef [[TMP0:%.*]]) #[[ATTR0]] !type [[META2]] !type [[META3]] {
; LOWERTYPETESTS-NEXT:    [[TMP2:%.*]] = tail call i32 @f(i32 noundef [[TMP0]]) #[[ATTR0]]
; LOWERTYPETESTS-NEXT:    ret i32 [[TMP2]]
;
;
; LOWERTYPETESTS-LABEL: define private void @.cfi.jumptable
; LOWERTYPETESTS-SAME: () #[[ATTR3:[0-9]+]] align 8 {
; LOWERTYPETESTS-NEXT:  entry:
; LOWERTYPETESTS-NEXT:    call void asm sideeffect "jmp ${0:c}@plt\0Aint3\0Aint3\0Aint3\0Ajmp ${1:c}@plt\0Aint3\0Aint3\0Aint3\0A", "s,s"(ptr @f, ptr @f_thunk)
; LOWERTYPETESTS-NEXT:    unreachable
;