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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
244 lines
6.3 KiB
LLVM
244 lines
6.3 KiB
LLVM
; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -frame-pointer=all -tailcallopt | FileCheck %s -check-prefix CHECK-TAIL
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; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -frame-pointer=all | FileCheck %s
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; RUN: llc -verify-machineinstrs < %s -mtriple=aarch64-none-linux-gnu -frame-pointer=all -tailcallopt -aarch64-redzone | FileCheck %s -check-prefix CHECK-TAIL-RZ
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; Without tailcallopt fastcc still means the caller cleans up the
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; stack, so try to make sure this is respected.
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define fastcc void @func_stack0() {
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; CHECK-LABEL: func_stack0:
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; CHECK: sub sp, sp, #48
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; CHECK: add x29, sp, #32
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; CHECK: str w{{[0-9]+}}, [sp]
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; CHECK-TAIL-LABEL: func_stack0:
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; CHECK-TAIL: sub sp, sp, #48
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; CHECK-TAIL-NEXT: stp x29, x30, [sp, #32]
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; CHECK-TAIL-NEXT: add x29, sp, #32
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; CHECK-TAIL: str w{{[0-9]+}}, [sp]
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call fastcc void @func_stack8([8 x i32] undef, i32 42)
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; CHECK: bl func_stack8
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; CHECK-NOT: sub sp, sp,
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; CHECK-NOT: [sp, #{{[-0-9]+}}]!
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; CHECK-NOT: [sp], #{{[-0-9]+}}
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; CHECK-TAIL: bl func_stack8
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; CHECK-TAIL: stp xzr, xzr, [sp, #-16]!
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call fastcc void @func_stack32([8 x i32] undef, i128 0, i128 9)
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; CHECK: bl func_stack32
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; CHECK-NOT: sub sp, sp,
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; CHECK-TAIL: bl func_stack32
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; CHECK-TAIL: sub sp, sp, #32
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call fastcc void @func_stack0()
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; CHECK: bl func_stack0
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; CHECK-NOT: sub sp, sp
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; CHECK-TAIL: bl func_stack0
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; CHECK-TAIL-NOT: sub sp, sp
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ret void
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; CHECK: ldp x29, x30, [sp, #32]
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; CHECK-NEXT: add sp, sp, #48
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; CHECK-NEXT: ret
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; CHECK-TAIL: ldp x29, x30, [sp, #32]
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; CHECK-TAIL-NEXT: add sp, sp, #48
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; CHECK-TAIL-NEXT: ret
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}
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define fastcc void @func_stack8([8 x i32], i32 %stacked) {
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; CHECK-LABEL: func_stack8:
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; CHECK: sub sp, sp, #48
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; CHECK: stp x29, x30, [sp, #32]
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; CHECK: add x29, sp, #32
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; CHECK: str w{{[0-9]+}}, [sp]
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; CHECK-TAIL-LABEL: func_stack8:
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; CHECK-TAIL: sub sp, sp, #48
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; CHECK-TAIL: stp x29, x30, [sp, #32]
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; CHECK-TAIL: add x29, sp, #32
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; CHECK-TAIL: str w{{[0-9]+}}, [sp]
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call fastcc void @func_stack8([8 x i32] undef, i32 42)
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; CHECK: bl func_stack8
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; CHECK-NOT: sub sp, sp,
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; CHECK-NOT: [sp, #{{[-0-9]+}}]!
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; CHECK-NOT: [sp], #{{[-0-9]+}}
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; CHECK-TAIL: bl func_stack8
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; CHECK-TAIL: stp xzr, xzr, [sp, #-16]!
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call fastcc void @func_stack32([8 x i32] undef, i128 0, i128 9)
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; CHECK: bl func_stack32
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; CHECK-NOT: sub sp, sp,
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; CHECK-TAIL: bl func_stack32
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; CHECK-TAIL: sub sp, sp, #32
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call fastcc void @func_stack0()
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; CHECK: bl func_stack0
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; CHECK-NOT: sub sp, sp
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; CHECK-TAIL: bl func_stack0
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; CHECK-TAIL-NOT: sub sp, sp
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ret void
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; CHECK-NEXT: ldp x29, x30, [sp, #32]
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; CHECK: add sp, sp, #48
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; CHECK-NEXT: ret
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; CHECK-TAIL: ldp x29, x30, [sp, #32]
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; CHECK-TAIL-NEXT: add sp, sp, #64
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; CHECK-TAIL-NEXT: ret
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}
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define fastcc void @func_stack32([8 x i32], i128 %stacked0, i128 %stacked1) {
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; CHECK-LABEL: func_stack32:
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; CHECK: add x29, sp, #32
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; CHECK-TAIL-LABEL: func_stack32:
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; CHECK-TAIL: add x29, sp, #32
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call fastcc void @func_stack8([8 x i32] undef, i32 42)
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; CHECK: bl func_stack8
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; CHECK-NOT: sub sp, sp,
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; CHECK-NOT: [sp, #{{[-0-9]+}}]!
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; CHECK-NOT: [sp], #{{[-0-9]+}}
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; CHECK-TAIL: bl func_stack8
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; CHECK-TAIL: stp xzr, xzr, [sp, #-16]!
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call fastcc void @func_stack32([8 x i32] undef, i128 0, i128 9)
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; CHECK: bl func_stack32
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; CHECK-NOT: sub sp, sp,
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; CHECK-TAIL: bl func_stack32
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; CHECK-TAIL: sub sp, sp, #32
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call fastcc void @func_stack0()
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; CHECK: bl func_stack0
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; CHECK-NOT: sub sp, sp
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; CHECK-TAIL: bl func_stack0
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; CHECK-TAIL-NOT: sub sp, sp
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ret void
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; CHECK: ldp x29, x30, [sp, #32]
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; CHECK-NEXT: add sp, sp, #48
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; CHECK-NEXT: ret
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; CHECK-TAIL: ldp x29, x30, [sp, #32]
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; CHECK-TAIL-NEXT: add sp, sp, #80
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; CHECK-TAIL-NEXT: ret
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}
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; Check that arg stack pop is done after callee-save restore when no frame pointer is used.
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define fastcc void @func_stack32_leaf([8 x i32], i128 %stacked0, i128 %stacked1) {
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; CHECK-LABEL: func_stack32_leaf:
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; CHECK: str x20, [sp, #-16]!
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; CHECK: nop
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; CHECK-NEXT: //NO_APP
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; CHECK-NEXT: ldr x20, [sp], #16
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; CHECK-NEXT: ret
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; CHECK-TAIL-LABEL: func_stack32_leaf:
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; CHECK-TAIL: str x20, [sp, #-16]!
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; CHECK-TAIL: nop
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; CHECK-TAIL-NEXT: //NO_APP
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; CHECK-TAIL-NEXT: ldr x20, [sp], #16
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; CHECK-TAIL-NEXT: add sp, sp, #32
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; CHECK-TAIL-NEXT: ret
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; CHECK-TAIL-RZ-LABEL: func_stack32_leaf:
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; CHECK-TAIL-RZ: str x20, [sp, #-16]!
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; CHECK-TAIL-RZ-NOT: sub sp, sp
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; CHECK-TAIL-RZ: nop
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; CHECK-TAIL-RZ-NEXT: //NO_APP
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; CHECK-TAIL-RZ-NEXT: ldr x20, [sp], #16
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; CHECK-TAIL-RZ-NEXT: add sp, sp, #32
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; CHECK-TAIL-RZ-NEXT: ret
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; Make sure there is a callee-save register to save/restore.
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call void asm sideeffect "nop", "~{x20}"() nounwind
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ret void
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}
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; Check that arg stack pop is done after callee-save restore when no frame pointer is used.
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define fastcc void @func_stack32_leaf_local([8 x i32], i128 %stacked0, i128 %stacked1) {
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; CHECK-LABEL: func_stack32_leaf_local:
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; CHECK: sub sp, sp, #32
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; CHECK-NEXT: str x20, [sp, #16]
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; CHECK: nop
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; CHECK-NEXT: //NO_APP
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; CHECK-NEXT: ldr x20, [sp, #16]
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; CHECK-NEXT: add sp, sp, #32
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; CHECK-NEXT: ret
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; CHECK-TAIL-LABEL: func_stack32_leaf_local:
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; CHECK-TAIL: sub sp, sp, #32
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; CHECK-TAIL-NEXT: str x20, [sp, #16]
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; CHECK-TAIL: nop
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; CHECK-TAIL-NEXT: //NO_APP
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; CHECK-TAIL-NEXT: ldr x20, [sp, #16]
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; CHECK-TAIL-NEXT: add sp, sp, #64
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; CHECK-TAIL-NEXT: ret
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; CHECK-TAIL-RZ-LABEL: func_stack32_leaf_local:
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; CHECK-TAIL-RZ: str x20, [sp, #-16]!
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; CHECK-TAIL-RZ-NOT: sub sp, sp
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; CHECK-TAIL-RZ: nop
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; CHECK-TAIL-RZ-NEXT: //NO_APP
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; CHECK-TAIL-RZ-NEXT: ldr x20, [sp], #16
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; CHECK-TAIL-RZ-NEXT: add sp, sp, #32
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; CHECK-TAIL-RZ-NEXT: ret
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%val0 = alloca [2 x i64], align 8
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; Make sure there is a callee-save register to save/restore.
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call void asm sideeffect "nop", "~{x20}"() nounwind
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ret void
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}
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; Check that arg stack pop is done after callee-save restore when no frame pointer is used.
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define fastcc void @func_stack32_leaf_local_nocs([8 x i32], i128 %stacked0, i128 %stacked1) {
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; CHECK-LABEL: func_stack32_leaf_local_nocs:
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; CHECK: sub sp, sp, #16
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; CHECK: add sp, sp, #16
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; CHECK-NEXT: ret
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; CHECK-TAIL-LABEL: func_stack32_leaf_local_nocs:
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; CHECK-TAIL: sub sp, sp, #16
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; CHECK-TAIL: add sp, sp, #48
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; CHECK-TAIL-NEXT: ret
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; CHECK-TAIL-RZ-LABEL: func_stack32_leaf_local_nocs:
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; CHECK-TAIL-RZ: add sp, sp, #32
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; CHECK-TAIL-RZ-NEXT: ret
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%val0 = alloca [2 x i64], align 8
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ret void
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}
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