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