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| author | Dale Johannesen <dalej@apple.com> | 2010-07-02 20:16:09 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2010-07-02 20:16:09 +0000 |
| commit | f1e309eb4862459a76445942ba4dafc433b6f317 (patch) | |
| tree | 9ffe14cb16d9826246eabf37e3a126065183256f /test/CodeGen/X86/2010-07-02-asm-alignstack.ll | |
| parent | 6bae55017c49e59746a65cef2513f031bbcebfce (diff) | |
| download | llvm-f1e309eb4862459a76445942ba4dafc433b6f317.tar.gz llvm-f1e309eb4862459a76445942ba4dafc433b6f317.tar.bz2 llvm-f1e309eb4862459a76445942ba4dafc433b6f317.tar.xz | |
Propagate the AlignStack bit in InlineAsm's to the
PrologEpilog code, and use it to determine whether
the asm forces stack alignment or not. gcc consistently
does not do this for GCC-style asms; Apple gcc inconsistently
sometimes does it for asm blocks. There is no
convenient place to put a bit in either the SDNode or
the MachineInstr form, so I've added an extra operand
to each; unlovely, but it does allow for expansion for
more bits, should we need it. PR 5125. Some
existing testcases are affected.
The operand lists of the SDNode and MachineInstr forms
are indexed with awesome mnemonics, like "2"; I may
fix this someday, but not now. I'm not making it any
worse. If anyone is inspired I think you can find all
the right places from this patch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107506 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/2010-07-02-asm-alignstack.ll')
| -rw-r--r-- | test/CodeGen/X86/2010-07-02-asm-alignstack.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2010-07-02-asm-alignstack.ll b/test/CodeGen/X86/2010-07-02-asm-alignstack.ll new file mode 100644 index 0000000000..cb47d208dd --- /dev/null +++ b/test/CodeGen/X86/2010-07-02-asm-alignstack.ll @@ -0,0 +1,31 @@ +; RUN: llc < %s -mtriple=x86_64-apple-darwin10 | FileCheck %s + +define void @foo() nounwind ssp { +entry: +; CHECK: foo +; CHECK: subq $8, %rsp +; CHECK: int $3 + call void asm sideeffect alignstack "# top of block", "~{dirflag},~{fpsr},~{flags},~{edi},~{esi},~{edx},~{ecx},~{eax}"() nounwind + call void asm sideeffect alignstack ".file \22small.c\22", "~{dirflag},~{fpsr},~{flags}"() nounwind + call void asm sideeffect alignstack ".line 3", "~{dirflag},~{fpsr},~{flags}"() nounwind + call void asm sideeffect alignstack "int $$3", "~{dirflag},~{fpsr},~{flags},~{memory}"() nounwind + br label %return + +return: ; preds = %entry + ret void +} + +define void @bar() nounwind ssp { +entry: +; CHECK: bar +; CHECK-NOT: subq $8, %rsp +; CHECK: int $3 + call void asm sideeffect "# top of block", "~{dirflag},~{fpsr},~{flags},~{edi},~{esi},~{edx},~{ecx},~{eax}"() nounwind + call void asm sideeffect ".file \22small.c\22", "~{dirflag},~{fpsr},~{flags}"() nounwind + call void asm sideeffect ".line 3", "~{dirflag},~{fpsr},~{flags}"() nounwind + call void asm sideeffect "int $$3", "~{dirflag},~{fpsr},~{flags},~{memory}"() nounwind + br label %return + +return: ; preds = %entry + ret void +} |