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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. llvm-svn: 107506
32 lines
1.2 KiB
LLVM
32 lines
1.2 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-darwin10 | FileCheck %s
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define void @foo() nounwind ssp {
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entry:
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; CHECK: foo
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; CHECK: subq $8, %rsp
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; CHECK: int $3
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call void asm sideeffect alignstack "# top of block", "~{dirflag},~{fpsr},~{flags},~{edi},~{esi},~{edx},~{ecx},~{eax}"() nounwind
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call void asm sideeffect alignstack ".file \22small.c\22", "~{dirflag},~{fpsr},~{flags}"() nounwind
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call void asm sideeffect alignstack ".line 3", "~{dirflag},~{fpsr},~{flags}"() nounwind
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call void asm sideeffect alignstack "int $$3", "~{dirflag},~{fpsr},~{flags},~{memory}"() nounwind
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @bar() nounwind ssp {
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entry:
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; CHECK: bar
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; CHECK-NOT: subq $8, %rsp
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; CHECK: int $3
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call void asm sideeffect "# top of block", "~{dirflag},~{fpsr},~{flags},~{edi},~{esi},~{edx},~{ecx},~{eax}"() nounwind
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call void asm sideeffect ".file \22small.c\22", "~{dirflag},~{fpsr},~{flags}"() nounwind
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call void asm sideeffect ".line 3", "~{dirflag},~{fpsr},~{flags}"() nounwind
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call void asm sideeffect "int $$3", "~{dirflag},~{fpsr},~{flags},~{memory}"() nounwind
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br label %return
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return: ; preds = %entry
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ret void
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}
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