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| author | Bradley Smith <bradley.smith@arm.com> | 2015-04-28 11:24:54 +0000 |
|---|---|---|
| committer | Bradley Smith <bradley.smith@arm.com> | 2015-04-28 11:24:54 +0000 |
| commit | ba945626b094899c7a4cae587398a69097da560c (patch) | |
| tree | 8999ff7481a090b491d669dc6bbcaeee21b32aeb /clang/test/CodeGen/arm-bitfield-alignment.c | |
| parent | 86e0249235f15fae19709e21b1ae250fd1f20ca0 (diff) | |
| download | bcm5719-llvm-ba945626b094899c7a4cae587398a69097da560c.tar.gz bcm5719-llvm-ba945626b094899c7a4cae587398a69097da560c.zip | |
[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
Diffstat (limited to 'clang/test/CodeGen/arm-bitfield-alignment.c')
| -rw-r--r-- | clang/test/CodeGen/arm-bitfield-alignment.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/clang/test/CodeGen/arm-bitfield-alignment.c b/clang/test/CodeGen/arm-bitfield-alignment.c new file mode 100644 index 00000000000..66bbdae57bb --- /dev/null +++ b/clang/test/CodeGen/arm-bitfield-alignment.c @@ -0,0 +1,15 @@ +// RUN: %clang_cc1 -triple arm-none-eabi -ffreestanding -emit-llvm -o - -O3 %s | FileCheck %s +// RUN: %clang_cc1 -triple aarch64 -ffreestanding -emit-llvm -o - -O3 %s | FileCheck %s + +extern struct T { + int b0 : 8; + int b1 : 24; + int b2 : 1; +} g; + +int func() { + return g.b1; +} + +// CHECK: @g = external global %struct.T, align 4 +// CHECK: %{{.*}} = load i64, i64* bitcast (%struct.T* @g to i64*), align 4 |
