llvm/test/Transforms/ArgumentPromotion/fp80.ll

; RUN: opt < %s -argpromotion -S | FileCheck %s

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

%union.u = type { x86_fp80 }
%struct.s = type { double, i16, i8, [5 x i8] }

@b = internal global %struct.s { double 3.14, i16 9439, i8 25, [5 x i8] undef }, align 16

%struct.Foo = type { i32, i64 }
@a = internal global %struct.Foo { i32 1, i64 2 }, align 8

define void @run() {
entry:
  tail call i8 @UseLongDoubleUnsafely(%union.u* byval align 16 bitcast (%struct.s* @b to %union.u*))
  tail call x86_fp80 @UseLongDoubleSafely(%union.u* byval align 16 bitcast (%struct.s* @b to %union.u*))
  call i64 @AccessPaddingOfStruct(%struct.Foo* @a)
  call i64 @CaptureAStruct(%struct.Foo* @a)
  ret void
}

; CHECK: internal i8 @UseLongDoubleUnsafely(%union.u* byval align 16 %arg) {
define internal i8 @UseLongDoubleUnsafely(%union.u* byval align 16 %arg) {
entry:
  %bitcast = bitcast %union.u* %arg to %struct.s*
  %gep = getelementptr inbounds %struct.s, %struct.s* %bitcast, i64 0, i32 2
  %result = load i8, i8* %gep
  ret i8 %result
}

; CHECK: internal x86_fp80 @UseLongDoubleSafely(x86_fp80 {{%.*}}) {
define internal x86_fp80 @UseLongDoubleSafely(%union.u* byval align 16 %arg) {
  %gep = getelementptr inbounds %union.u, %union.u* %arg, i64 0, i32 0
  %fp80 = load x86_fp80, x86_fp80* %gep
  ret x86_fp80 %fp80
}

; CHECK: define internal i64 @AccessPaddingOfStruct(%struct.Foo* byval %a) {
define internal i64 @AccessPaddingOfStruct(%struct.Foo* byval %a) {
  %p = bitcast %struct.Foo* %a to i64*
  %v = load i64, i64* %p
  ret i64 %v
}

; CHECK: define internal i64 @CaptureAStruct(%struct.Foo* byval %a) {
define internal i64 @CaptureAStruct(%struct.Foo* byval %a) {
entry:
  %a_ptr = alloca %struct.Foo*
  br label %loop

loop:
  %phi = phi %struct.Foo* [ null, %entry ], [ %gep, %loop ]
  %0   = phi %struct.Foo* [ %a, %entry ],   [ %0, %loop ]
  store %struct.Foo* %phi, %struct.Foo** %a_ptr
  %gep = getelementptr %struct.Foo, %struct.Foo* %a, i64 0
  br label %loop
}