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https://github.com/c64scene-ar/llvm-6502.git
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8f5c829c1e
The TOC base pointer is passed in r2, and we normally reserve this register so that we can depend on it being there. However, for leaf functions, and specifically those leaf functions that don't do any TOC access of their own (which is generally due to accessing the constant pool, using TLS, etc.), we can treat r2 as an ordinary callee-saved register (it must be callee-saved because, for local direct calls, the linker will not insert any save/restore code). The allocation order has been changed slightly for PPC64/ELF systems to put r2 at the end of the list (while leaving it near the beginning for Darwin systems to prevent unnecessary output changes). While r2 is allocatable, using it still requires spill/restore traffic, and thus comes at the end of the list. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227745 91177308-0d34-0410-b5e6-96231b3b80d8
82 lines
2.4 KiB
LLVM
82 lines
2.4 KiB
LLVM
; RUN: llc -mcpu=pwr7 < %s | FileCheck %s
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target datalayout = "E-m:e-i64:64-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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define signext i32 @foo(i32 signext %a, i32 signext %d) #0 {
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entry:
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%div = sdiv i32 %a, %d
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%div1 = sdiv i32 %div, %d
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%div2 = sdiv i32 %div1, %d
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%div3 = sdiv i32 %div2, %d
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%div4 = sdiv i32 %div3, %d
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%div5 = sdiv i32 %div4, %d
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%div6 = sdiv i32 %div5, %d
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%div7 = sdiv i32 %div6, %d
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%div8 = sdiv i32 %div7, %d
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%div9 = sdiv i32 %div8, %d
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%div10 = sdiv i32 %div9, %d
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%div11 = sdiv i32 %div10, %d
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%div12 = sdiv i32 %div11, %d
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%div13 = sdiv i32 %div12, %d
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%div14 = sdiv i32 %div13, %d
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%div15 = sdiv i32 %div14, %d
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%div16 = sdiv i32 %div15, %d
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%div17 = sdiv i32 %div16, %d
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%div18 = sdiv i32 %div17, %d
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%div19 = sdiv i32 %div18, %d
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%div20 = sdiv i32 %div19, %d
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%div21 = sdiv i32 %div20, %d
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%div22 = sdiv i32 %div21, %d
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%div23 = sdiv i32 %div22, %d
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%div24 = sdiv i32 %div23, %d
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%div25 = sdiv i32 %div24, %d
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%div26 = sdiv i32 %div25, %d
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%div27 = sdiv i32 %div26, %d
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%div28 = sdiv i32 %div27, %d
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%div29 = sdiv i32 %div28, %d
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%div30 = sdiv i32 %div29, %d
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%div31 = sdiv i32 %div30, %d
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%div32 = sdiv i32 %div31, %d
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%div33 = sdiv i32 %div32, %div31
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%div34 = sdiv i32 %div33, %div30
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%div35 = sdiv i32 %div34, %div29
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%div36 = sdiv i32 %div35, %div28
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%div37 = sdiv i32 %div36, %div27
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%div38 = sdiv i32 %div37, %div26
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%div39 = sdiv i32 %div38, %div25
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%div40 = sdiv i32 %div39, %div24
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%div41 = sdiv i32 %div40, %div23
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%div42 = sdiv i32 %div41, %div22
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%div43 = sdiv i32 %div42, %div21
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%div44 = sdiv i32 %div43, %div20
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%div45 = sdiv i32 %div44, %div19
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%div46 = sdiv i32 %div45, %div18
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%div47 = sdiv i32 %div46, %div17
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%div48 = sdiv i32 %div47, %div16
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%div49 = sdiv i32 %div48, %div15
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%div50 = sdiv i32 %div49, %div14
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%div51 = sdiv i32 %div50, %div13
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%div52 = sdiv i32 %div51, %div12
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%div53 = sdiv i32 %div52, %div11
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%div54 = sdiv i32 %div53, %div10
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%div55 = sdiv i32 %div54, %div9
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%div56 = sdiv i32 %div55, %div8
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%div57 = sdiv i32 %div56, %div7
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%div58 = sdiv i32 %div57, %div6
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%div59 = sdiv i32 %div58, %div5
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%div60 = sdiv i32 %div59, %div4
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%div61 = sdiv i32 %div60, %div3
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%div62 = sdiv i32 %div61, %div2
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%div63 = sdiv i32 %div62, %div1
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%div64 = sdiv i32 %div63, %div
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ret i32 %div64
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}
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; This function will need to use all non-reserved GPRs (and then some), make
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; sure that r2 is among them.
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; CHECK-LABEL: @foo
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; CHECK: std 2,
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; CHECK: ld 2,
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; CHECK: blr
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