llvm/test/Transforms/InstCombine/vararg.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -passes=instcombine -S | FileCheck %s

%struct.__va_list = type { ptr, ptr, ptr, i32, i32 }

define void @func(ptr nocapture readnone %fmt, ...) {
; CHECK-LABEL: define void @func(
; CHECK-SAME: ptr readnone captures(none) [[FMT:%.*]], ...) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    ret void
;
entry:
  %va0 = alloca %struct.__va_list, align 8
  %va1 = alloca %struct.__va_list, align 8
  call void @llvm.lifetime.start.p0(i64 32, ptr %va0)
  call void @llvm.va_start(ptr %va0)
  call void @llvm.lifetime.start.p0(i64 32, ptr %va1)
  call void @llvm.va_copy(ptr %va1, ptr %va0)
  call void @llvm.va_end(ptr %va1)
  call void @llvm.lifetime.end.p0(i64 32, ptr %va1)
  call void @llvm.va_end(ptr %va0)
  call void @llvm.lifetime.end.p0(i64 32, ptr %va0)
  ret void
}

declare void @callee(ptr)

define void @func_destroy_copy_src(ptr nocapture readnone %fmt, ...) {
; CHECK-LABEL: define void @func_destroy_copy_src(
; CHECK-SAME: ptr readnone captures(none) [[FMT:%.*]], ...) {
; CHECK-NEXT:  [[ENTRY:.*:]]
; CHECK-NEXT:    [[VA0:%.*]] = alloca [[STRUCT___VA_LIST:%.*]], align 8
; CHECK-NEXT:    [[VA1:%.*]] = alloca [[STRUCT___VA_LIST]], align 8
; CHECK-NEXT:    call void @llvm.lifetime.start.p0(i64 32, ptr nonnull [[VA0]])
; CHECK-NEXT:    call void @llvm.lifetime.start.p0(i64 32, ptr nonnull [[VA1]])
; CHECK-NEXT:    call void @llvm.va_start.p0(ptr nonnull [[VA0]])
; CHECK-NEXT:    call void @llvm.va_copy.p0(ptr nonnull [[VA1]], ptr nonnull [[VA0]])
; CHECK-NEXT:    call void @llvm.va_end.p0(ptr [[VA0]])
; CHECK-NEXT:    call void @callee(ptr nonnull [[VA1]])
; CHECK-NEXT:    call void @llvm.va_end.p0(ptr [[VA1]])
; CHECK-NEXT:    call void @llvm.lifetime.end.p0(i64 32, ptr nonnull [[VA1]])
; CHECK-NEXT:    call void @llvm.lifetime.end.p0(i64 32, ptr nonnull [[VA0]])
; CHECK-NEXT:    ret void
;
entry:
  %va0 = alloca %struct.__va_list, align 8
  %va1 = alloca %struct.__va_list, align 8
  call void @llvm.lifetime.start.p0(i64 32, ptr %va0)
  call void @llvm.lifetime.start.p0(i64 32, ptr %va1)
  call void @llvm.va_start(ptr %va0)
  call void @llvm.va_copy(ptr %va1, ptr %va0)
  call void @llvm.va_end(ptr %va0)
  call void @callee(ptr %va1)
  call void @llvm.va_end(ptr %va1)
  call void @llvm.lifetime.end.p0(i64 32, ptr %va1)
  call void @llvm.lifetime.end.p0(i64 32, ptr %va0)
  ret void
}