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
63 lines
1.4 KiB
LLVM
63 lines
1.4 KiB
LLVM
; RUN: llc < %s -mtriple=i686-- -asm-verbose=false | FileCheck %s -check-prefix=FP-ELIM
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; RUN: llc < %s -mtriple=i686-- -asm-verbose=false -frame-pointer=all | FileCheck %s -check-prefix=NO-ELIM
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; Implement -momit-leaf-frame-pointer
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; rdar://7886181
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define i32 @t1() nounwind readnone {
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entry:
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; FP-ELIM-LABEL: t1:
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; FP-ELIM-NEXT: movl
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; FP-ELIM-NEXT: ret
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; NO-ELIM-LABEL: t1:
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; NO-ELIM-NEXT: pushl %ebp
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; NO-ELIM: popl %ebp
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; NO-ELIM-NEXT: ret
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ret i32 10
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}
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define void @t2() nounwind {
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entry:
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; FP-ELIM-LABEL: t2:
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; FP-ELIM-NOT: pushl %ebp
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; FP-ELIM: ret
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; NO-ELIM-LABEL: t2:
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; NO-ELIM-NEXT: pushl %ebp
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; NO-ELIM: popl %ebp
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; NO-ELIM-NEXT: ret
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tail call void @foo(i32 0) nounwind
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ret void
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}
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define i32 @t3() "no-frame-pointer-elim-non-leaf" nounwind readnone {
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entry:
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; FP-ELIM-LABEL: t3:
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; FP-ELIM-NEXT: movl
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; FP-ELIM-NEXT: ret
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; NO-ELIM-LABEL: t3:
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; NO-ELIM-NEXT: pushl %ebp
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; NO-ELIM: popl %ebp
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; NO-ELIM-NEXT: ret
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ret i32 10
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}
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define void @t4() "no-frame-pointer-elim-non-leaf" nounwind {
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entry:
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; FP-ELIM-LABEL: t4:
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; FP-ELIM-NEXT: pushl %ebp
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; FP-ELIM: popl %ebp
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; FP-ELIM-NEXT: ret
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; NO-ELIM-LABEL: t4:
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; NO-ELIM-NEXT: pushl %ebp
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; NO-ELIM: popl %ebp
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; NO-ELIM-NEXT: ret
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tail call void @foo(i32 0) nounwind
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ret void
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}
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declare void @foo(i32)
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