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llvm-project/clang/test/CodeGen/arm-bitfield-alignment.c

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[clang] Better SysV bitfield access units (#65742) Reimplement bitfield access unit computation for SysV ABIs. Considers expense of unaligned and non-power-of-2 accesses.
2024-03-22 14:22:19 -04:00
// RUN: %clang_cc1 -triple arm-none-eabi -fdump-record-layouts-simple -ffreestanding -emit-llvm -o %t %s | FileCheck %s -check-prefixes=LAYOUT,LAYOUT-32
// RUN: FileCheck %s -check-prefixes=IR,IR-32 <%t
// RUN: %clang_cc1 -triple aarch64 -fdump-record-layouts-simple -ffreestanding -emit-llvm -o %t %s | FileCheck %s -check-prefixes=LAYOUT,LAYOUT-64
// RUN: FileCheck %s -check-prefixes=IR,IR-64 <%t
[ARM/AArch64] Enforce alignment for bitfielded structs When creating a global variable with a type of a struct with bitfields, we must forcibly set the alignment of the global from the RecordDecl. We must do this so that the proper bitfield alignment makes its way down to LLVM, since clang will mangle the bitfields into one large type. llvm-svn: 235976
2015-04-28 11:24:54 +00:00
extern struct T {
int b0 : 8;
int b1 : 24;
int b2 : 1;
} g;
Use functions with prototypes when appropriate; NFC A significant number of our tests in C accidentally use functions without prototypes. This patch converts the function signatures to have a prototype for the situations where the test is not specific to K&R C declarations. e.g., void func(); becomes void func(void); This is the tenth batch of tests being updated (there are a significant number of other tests left to be updated).
2022-02-15 09:27:12 -05:00
int func(void) {
[ARM/AArch64] Enforce alignment for bitfielded structs When creating a global variable with a type of a struct with bitfields, we must forcibly set the alignment of the global from the RecordDecl. We must do this so that the proper bitfield alignment makes its way down to LLVM, since clang will mangle the bitfields into one large type. llvm-svn: 235976
2015-04-28 11:24:54 +00:00
return g.b1;
}
[clang][NFC] Bitfield access unit tests (#65742) Verify bitfield access units.
2023-09-05 11:08:25 -04:00
// IR: @g = external global %struct.T, align 4
[clang] Better SysV bitfield access units (#65742) Reimplement bitfield access unit computation for SysV ABIs. Considers expense of unaligned and non-power-of-2 accesses.
2024-03-22 14:22:19 -04:00
// IR-32: %{{.*}} = load i32, ptr @g, align 4
// IR-64: %{{.*}} = load i64, ptr @g, align 4
[clang][NFC] Bitfield access unit tests (#65742) Verify bitfield access units.
2023-09-05 11:08:25 -04:00
// LAYOUT-LABEL: LLVMType:%struct.T =
[clang] Better SysV bitfield access units (#65742) Reimplement bitfield access unit computation for SysV ABIs. Considers expense of unaligned and non-power-of-2 accesses.
2024-03-22 14:22:19 -04:00
// LAYOUT-32-SAME: type { i32, i8 }
// LAYOUT-64-SAME: type { i64 }
[clang][NFC] Bitfield access unit tests (#65742) Verify bitfield access units.
2023-09-05 11:08:25 -04:00
// LAYOUT: BitFields:[
[clang] Better SysV bitfield access units (#65742) Reimplement bitfield access unit computation for SysV ABIs. Considers expense of unaligned and non-power-of-2 accesses.
2024-03-22 14:22:19 -04:00
// LAYOUT-32-NEXT: <CGBitFieldInfo Offset:0 Size:8 IsSigned:1 StorageSize:32 StorageOffset:0
// LAYOUT-32-NEXT: <CGBitFieldInfo Offset:8 Size:24 IsSigned:1 StorageSize:32 StorageOffset:0
// LAYOUT-32-NEXT: <CGBitFieldInfo Offset:0 Size:1 IsSigned:1 StorageSize:8 StorageOffset:4
// LAYOUT-64-NEXT: <CGBitFieldInfo Offset:0 Size:8 IsSigned:1 StorageSize:64 StorageOffset:0
// LAYOUT-64-NEXT: <CGBitFieldInfo Offset:8 Size:24 IsSigned:1 StorageSize:64 StorageOffset:0
// LAYOUT-64-NEXT: <CGBitFieldInfo Offset:32 Size:1 IsSigned:1 StorageSize:64 StorageOffset:0
[clang][NFC] Bitfield access unit tests (#65742) Verify bitfield access units.
2023-09-05 11:08:25 -04:00
// LAYOUT-NEXT: ]>
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