b7cef81fd3
Part of the effort to refactoring frame pointer code generation. We used to use two function attributes "no-frame-pointer-elim" and "no-frame-pointer-elim-non-leaf" to represent three kinds of frame pointer usage: (all) frames use frame pointer, (non-leaf) frames use frame pointer, (none) frame use frame pointer. This CL makes the idea explicit by using only one enum function attribute "frame-pointer" Option "-frame-pointer=" replaces "-disable-fp-elim" for tools such as llc. "no-frame-pointer-elim" and "no-frame-pointer-elim-non-leaf" are still supported for easy migration to "frame-pointer". tests are mostly updated with // replace command line args ‘-disable-fp-elim=false’ with ‘-frame-pointer=none’ grep -iIrnl '\-disable-fp-elim=false' * | xargs sed -i '' -e "s/-disable-fp-elim=false/-frame-pointer=none/g" // replace command line args ‘-disable-fp-elim’ with ‘-frame-pointer=all’ grep -iIrnl '\-disable-fp-elim' * | xargs sed -i '' -e "s/-disable-fp-elim/-frame-pointer=all/g" Patch by Yuanfang Chen (tabloid.adroit)! Differential Revision: https://reviews.llvm.org/D56351 llvm-svn: 351049
30 lines
869 B
LLVM
30 lines
869 B
LLVM
; RUN: llc -O0 -frame-pointer=all < %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 r4
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; CHECK: mov r1, r4
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; CHECK: sub #2, r1
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%i = alloca i16, align 2
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; CHECK: clr -2(r4)
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store i16 0, i16* %i, align 2
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; CHECK: pop 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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