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| author | Bill Wendling <isanbard@gmail.com> | 2012-08-08 06:30:30 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2012-08-08 06:30:30 +0000 |
| commit | ef920552d4fb0959097f1c165cfc81c69db19934 (patch) | |
| tree | a1f589492e274e09eb1aa6dcdac1b0fb4a27eb86 /test | |
| parent | d43b5c97cff06d7840b974ca84fa0639d2567968 (diff) | |
| download | external_llvm-ef920552d4fb0959097f1c165cfc81c69db19934.zip external_llvm-ef920552d4fb0959097f1c165cfc81c69db19934.tar.gz external_llvm-ef920552d4fb0959097f1c165cfc81c69db19934.tar.bz2 | |
Add `.pushsection', `.popsection', and `.previous' directives to Darwin ASM.
There are situations where inline ASM may want to change the section -- for
instance, to create a variable in the .data section. However, it cannot do this
without (potentially) restoring to the wrong section. E.g.:
asm volatile (".section __DATA, __data\n\t"
".globl _fnord\n\t"
"_fnord: .quad 1f\n\t"
".text\n\t"
"1:" :::);
This may be wrong if this is inlined into a function that has a "section"
attribute. The user should use `.pushsection' and `.popsection' here instead.
The addition of `.previous' is added for completeness.
<rdar://problem/12048387>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161477 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/MC/MachO/previous.s | 13 | ||||
| -rw-r--r-- | test/MC/MachO/pushsection.s | 16 |
2 files changed, 29 insertions, 0 deletions
diff --git a/test/MC/MachO/previous.s b/test/MC/MachO/previous.s new file mode 100644 index 0000000..41077cd --- /dev/null +++ b/test/MC/MachO/previous.s @@ -0,0 +1,13 @@ +// RUN: llvm-mc -triple i386-apple-darwin9 %s -o - | FileCheck %s + +.text +// CHECK: .section __TEXT,__text + +.data +// CHECK: .section __DATA,__data + +.previous +// CHECK: .section __TEXT,__text + +.previous +// CHECK: .section __DATA,__data diff --git a/test/MC/MachO/pushsection.s b/test/MC/MachO/pushsection.s new file mode 100644 index 0000000..6881323 --- /dev/null +++ b/test/MC/MachO/pushsection.s @@ -0,0 +1,16 @@ +// RUN: llvm-mc -triple i386-apple-darwin9 %s -o - | FileCheck %s + +.text +// CHECK: .section __TEXT,__text + +.pushsection __DATA, __data +// CHECK: .section __DATA,__data + +.pushsection __TEXT, initcode +// CHECK: .section __TEXT,initcode + +.popsection +// CHECK: .section __DATA,__data + +.popsection +// CHECK: .section __TEXT,__text |