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Make sure SP is always aligned on a 2 byte boundary

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llvm-svn: 193320
This commit is contained in:
Job Noorman 2013-10-24 09:32:31 +00:00
parent 09c3fc8dac
commit 49c1205681
2 changed files with 19 additions and 2 deletions
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4
lib/Target/MSP430/MSP430FrameLowering.h
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@ -27,8 +27,8 @@ protected:
public:
explicit MSP430FrameLowering(const MSP430Subtarget &sti)
: TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 2, -2), STI(sti) {
}
: TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 2, -2, 2),
STI(sti) {}
/// emitProlog/emitEpilog - These methods insert prolog and epilog code into
/// the function.

17
test/CodeGen/MSP430/transient-stack-alignment.ll Normal file
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@ -0,0 +1,17 @@
; RUN: llc < %s | FileCheck %s
target datalayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:16:32-n8:16-a0:16:16"
target triple = "msp430---elf"
define void @test() #0 {
; CHECK-LABEL: test:
; CHECK: sub.w #2, r1
%1 = alloca i8, align 1
; CHECK-NEXT: mov.b #0, 1(r1)
store i8 0, i8* %1, align 1
; CHECK-NEXT: add.w #2, r1
; CHECK-NEXT: ret
ret void
}
attributes #0 = { nounwind "no-frame-pointer-elim"="false" }