llvm-mirror/test/CodeGen/PowerPC/2008-01-25-EmptyFunction.ll

; RUN: llc < %s -march=ppc32 | grep nop
target triple = "powerpc-apple-darwin8"


define void @bork() noreturn nounwind  {
entry:
        unreachable
}
on darwin empty functions need to codegen into something of non-zero length, otherwise labels get incorrectly merged. We handled this by emitting a ".byte 0", but this isn't correct on thumb/arm targets where the text segment needs to be a multiple of 2/4 bytes. Handle this by emitting a noop. This is more gross than it should be because arm/ppc are not fully mc'ized yet. This fixes rdar://7908505 llvm-svn: 102400 2010-04-27 01:37:21 +02:00			`; RUN: llc < %s -march=ppc32 \| grep nop`
Add target triples to these so they don't fail on linux. llvm-svn: 46496 2008-01-29 07:26:07 +01:00			`target triple = "powerpc-apple-darwin8"`

If we have a function like this: void bork() { int address = 0; address = 0; } It's compiled into LLVM code that looks like this: define void @bork() noreturn nounwind { entry: unreachable } This is bad on some platforms (like PPC) because it will generate the label for the function but no body. The label could end up being associated with some non-code related stuff, like a section. This places a "trap" instruction if the SimplifyCFG pass removed all code from the function leaving only one "unreachable" instruction. llvm-svn: 46387 2008-01-26 02:43:44 +01:00
Need to convert to LLVM code and not C. llvm-svn: 46397 2008-01-26 07:56:08 +01:00			`define void @bork() noreturn nounwind {`
			`entry:`
			`unreachable`
If we have a function like this: void bork() { int address = 0; address = 0; } It's compiled into LLVM code that looks like this: define void @bork() noreturn nounwind { entry: unreachable } This is bad on some platforms (like PPC) because it will generate the label for the function but no body. The label could end up being associated with some non-code related stuff, like a section. This places a "trap" instruction if the SimplifyCFG pass removed all code from the function leaving only one "unreachable" instruction. llvm-svn: 46387 2008-01-26 02:43:44 +01:00			`}`