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// https://github.com/ldc-developers/ldc/issues/3692
// REQUIRES: target_X86
// RUN: %ldc -mtriple=x86_64-linux-gnu -output-ll -of=%t.ll %s
// RUN: FileCheck %s < %t.ll
// D `int[3]` rewritten to LL `{ i64, i32 }` for SysV ABI - mismatching size and alignment
// CHECK: define void @_D6gh36924takeFG3iZv({ i64, i32 } %a_arg)
void take(int[3] a)
{
// the `{ i64, i32 }` size is 16 bytes, so we need a padded alloca (with 8-bytes alignment)
// CHECK-NEXT: %.BaseBitcastABIRewrite_param_storage = alloca { i64, i32 }, align 8
// CHECK-NEXT: store { i64, i32 } %a_arg, { i64, i32 }* %.BaseBitcastABIRewrite_param_storage
// CHECK-NEXT: %a = bitcast { i64, i32 }* %.BaseBitcastABIRewrite_param_storage to [3 x i32]*
}
// CHECK: define void @_D6gh36924passFZv()
void pass()
{
// CHECK-NEXT: %arrayliteral = alloca [3 x i32], align 4
// we need an extra padded alloca with proper alignment
// CHECK-NEXT: %.BaseBitcastABIRewrite_padded_arg_storage = alloca { i64, i32 }, align 8
// CHECK: %.BaseBitcastABIRewrite_arg = load { i64, i32 }, { i64, i32 }* %.BaseBitcastABIRewrite_padded_arg_storage
take([1, 2, 3]);
}
// D `int[4]` rewritten to LL `{ i64, i64 }` for SysV ABI - mismatching alignment only
// CHECK: define void @_D6gh36925take4FG4iZv({ i64, i64 } %a_arg)
void take4(int[4] a)
{
// the alloca should have 8-bytes alignment, even though a.alignof == 4
// CHECK-NEXT: %a = alloca [4 x i32], align 8
// CHECK-NEXT: %1 = bitcast [4 x i32]* %a to { i64, i64 }*
// CHECK-NEXT: store { i64, i64 } %a_arg, { i64, i64 }* %1
}
// CHECK: define void @_D6gh36925pass4FZv()
void pass4()
{
// CHECK-NEXT: %arrayliteral = alloca [4 x i32], align 4
// we need an extra alloca with 8-bytes alignment
// CHECK-NEXT: %.BaseBitcastABIRewrite_padded_arg_storage = alloca { i64, i64 }, align 8
// CHECK: %.BaseBitcastABIRewrite_arg = load { i64, i64 }, { i64, i64 }* %.BaseBitcastABIRewrite_padded_arg_storage
take4([1, 2, 3, 4]);
}
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