diff options
| author | Bill Wendling <isanbard@gmail.com> | 2010-07-15 23:32:40 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2010-07-15 23:32:40 +0000 |
| commit | e9bf7e692e56656ef13b33af86624d0fdcd578fb (patch) | |
| tree | 2cb585a3c4d0fbf8bb51f00db689241d03af0ad0 /test/CodeGen | |
| parent | 60108e96bbc5432f4fe06ba313e64448e97a0e15 (diff) | |
Handle code gen for the unreachable instruction if it's the only instruction in
the function. We'll just turn it into a "trap" instruction instead.
The problem with not handling this is that it might generate a prologue without
the equivalent epilogue to go with it:
$ cat t.ll
define void @foo() {
entry:
unreachable
}
$ llc -o - t.ll -relocation-model=pic -disable-fp-elim -unwind-tables
.section __TEXT,__text,regular,pure_instructions
.globl _foo
.align 4, 0x90
_foo: ## @foo
Leh_func_begin0:
## BB#0: ## %entry
pushq %rbp
Ltmp0:
movq %rsp, %rbp
Ltmp1:
Leh_func_end0:
...
The unwind tables then have bad data in them causing all sorts of problems.
Fixes <rdar://problem/8096481>.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108473 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen')
| -rw-r--r-- | test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll | 2 | ||||
| -rw-r--r-- | test/CodeGen/X86/2008-01-25-EmptyFunction.ll | 13 |
2 files changed, 12 insertions, 3 deletions
diff --git a/test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll b/test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll index db2ab877ff..ba59309ec2 100644 --- a/test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll +++ b/test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll @@ -1,4 +1,4 @@ -; RUN: llc < %s -march=ppc32 | grep nop +; RUN: llc < %s -march=ppc32 | grep trap target triple = "powerpc-apple-darwin8" diff --git a/test/CodeGen/X86/2008-01-25-EmptyFunction.ll b/test/CodeGen/X86/2008-01-25-EmptyFunction.ll index b936686798..4baa294fb8 100644 --- a/test/CodeGen/X86/2008-01-25-EmptyFunction.ll +++ b/test/CodeGen/X86/2008-01-25-EmptyFunction.ll @@ -1,8 +1,17 @@ -; RUN: llc < %s -march=x86 | grep nop +; RUN: llc < %s -march=x86 | FileCheck -check-prefix=NO-FP %s +; RUN: llc < %s -march=x86 -disable-fp-elim | FileCheck -check-prefix=FP %s target triple = "i686-apple-darwin8" +define void @func1() noreturn nounwind { +entry: +; NO-FP: ud2 + unreachable +} -define void @bork() noreturn nounwind { +define void @func2() noreturn nounwind { entry: +; FP: pushl %ebp +; FP: movl %esp, %ebp +; FP: ud2 unreachable } |