mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-17 03:30:28 +00:00
8f58e02646
Don't promote byval pointer arguments when when their size in bits is not equal to their alloc size in bits. This can happen for x86_fp80, where the size in bits is 80 but the alloca size in bits in 128. Promoting these types can break passing unions of x86_fp80s and other types. Patch by Thomas Jablin! Reviewed By: rnk Differential Revision: http://reviews.llvm.org/D5057 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216693 91177308-0d34-0410-b5e6-96231b3b80d8
59 lines
1.9 KiB
LLVM
59 lines
1.9 KiB
LLVM
; 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* %bitcast, i64 0, i32 2
|
|
%result = load 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* %arg, i64 0, i32 0
|
|
%fp80 = load 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* %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* %a, i64 0
|
|
br label %loop
|
|
}
|