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f7ea499702
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
62 lines
1.6 KiB
LLVM
62 lines
1.6 KiB
LLVM
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu | FileCheck %s
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; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -frame-pointer=all | FileCheck -check-prefix CHECK-WITHFP-ARM64 %s
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; Make sure a reasonably sane prologue and epilogue are
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; generated. This test is not robust in the face of an frame-handling
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; evolving, but still has value for unrelated changes, I
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; believe.
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;
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; In particular, it will fail when ldp/stp are used for frame setup,
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; when FP-elim is implemented, and when addressing from FP is
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; implemented.
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@var = global i64 0
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@local_addr = global i64* null
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declare void @foo()
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define void @trivial_func() nounwind {
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; CHECK-LABEL: trivial_func: // @trivial_func
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; CHECK-NEXT: // %bb.0
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; CHECK-NEXT: ret
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ret void
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}
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define void @trivial_fp_func() {
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; CHECK-LABEL: trivial_fp_func:
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; CHECK: str x30, [sp, #-16]!
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; CHECK-NOT: mov x29, sp
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; CHECK-WITHFP-ARM64-LABEL: trivial_fp_func:
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; CHECK-WITHFP-ARM64: stp x29, x30, [sp, #-16]!
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; CHECK-WITHFP-ARM64-NEXT: mov x29, sp
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; Dont't really care, but it would be a Bad Thing if this came after the epilogue.
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; CHECK-WITHFP-ARM64: bl foo
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; CHECK: bl foo
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call void @foo()
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ret void
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; CHECK: ldr x30, [sp], #16
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; CHECK-NEXT: ret
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; CHECK-WITHFP-ARM64: ldp x29, x30, [sp], #16
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; CHECK-WITHFP-ARM64-NEXT: ret
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}
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define void @stack_local() {
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%local_var = alloca i64
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; CHECK-LABEL: stack_local:
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; CHECK: sub sp, sp, #16
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%val = load i64, i64* @var
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store i64 %val, i64* %local_var
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; CHECK-DAG: str {{x[0-9]+}}, [sp, #{{[0-9]+}}]
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store i64* %local_var, i64** @local_addr
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; CHECK-DAG: add {{x[0-9]+}}, sp, #{{[0-9]+}}
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ret void
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}
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