| ; RUN: llc -O0 -disable-fp-elim < %s | FileCheck %s | |
| target datalayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:16:32-n8:16" | |
| target triple = "msp430---elf" | |
| define void @fp() nounwind { | |
| entry: | |
| ; CHECK-LABEL: fp: | |
| ; CHECK: push.w r4 | |
| ; CHECK: mov.w r1, r4 | |
| ; CHECK: sub.w #2, r1 | |
| %i = alloca i16, align 2 | |
| ; CHECK: mov.w #0, -2(r4) | |
| store i16 0, i16* %i, align 2 | |
| ; CHECK: pop.w r4 | |
| ret void | |
| } | |
| ; Due to FPB not being marked as reserved, the register allocator used to select | |
| ; r4 as the register for the "r" constraint below. This test verifies that this | |
| ; does not happen anymore. Note that the only reason an ISR is used here is that | |
| ; the register allocator selects r4 first instead of fifth in a normal function. | |
| define msp430_intrcc void @fpb_alloced() #0 { | |
| ; CHECK-LABEL: fpb_alloced: | |
| ; CHECK-NOT: mov.b #0, r4 | |
| ; CHECK: nop | |
| call void asm sideeffect "nop", "r"(i8 0) | |
| ret void | |
| } |