eb7d16ea25
mflr is kind of expensive on Power version smaller than 10, so we should schedule the store for the mflr's def away from mflr. In epilogue, the expensive mtlr has no user for its def, so it doesn't matter that the load and the mtlr are back-to-back. Reviewed By: RolandF Differential Revision: https://reviews.llvm.org/D137423
42 lines
1.2 KiB
LLVM
42 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc -verify-machineinstrs < %s | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-i64:64-n32:64-S128-v256:256:256-v512:512:512"
|
|
target triple = "powerpc64le-unknown-linux-gnu"
|
|
|
|
%struct = type { [4 x i32], [20 x i8] }
|
|
|
|
declare dso_local i32 @foo1(ptr byval(%struct) %var)
|
|
declare dso_local void @foo(ptr %var)
|
|
|
|
; check that 36bytes byval parameter is passed all in registers.
|
|
|
|
define dso_local i32 @bar() {
|
|
; CHECK-LABEL: bar:
|
|
; CHECK: # %bb.0: # %entry
|
|
; CHECK-NEXT: mflr 0
|
|
; CHECK-NEXT: stdu 1, -80(1)
|
|
; CHECK-NEXT: std 0, 96(1)
|
|
; CHECK-NEXT: .cfi_def_cfa_offset 80
|
|
; CHECK-NEXT: .cfi_offset lr, 16
|
|
; CHECK-NEXT: addi 3, 1, 40
|
|
; CHECK-NEXT: bl foo
|
|
; CHECK-NEXT: nop
|
|
; CHECK-NEXT: lwz 7, 72(1)
|
|
; CHECK-NEXT: ld 6, 64(1)
|
|
; CHECK-NEXT: ld 5, 56(1)
|
|
; CHECK-NEXT: ld 4, 48(1)
|
|
; CHECK-NEXT: ld 3, 40(1)
|
|
; CHECK-NEXT: bl foo1
|
|
; CHECK-NEXT: nop
|
|
; CHECK-NEXT: addi 1, 1, 80
|
|
; CHECK-NEXT: ld 0, 16(1)
|
|
; CHECK-NEXT: mtlr 0
|
|
; CHECK-NEXT: blr
|
|
entry:
|
|
%x = alloca %struct, align 4
|
|
call void @foo(ptr %x)
|
|
%r = call i32 @foo1(ptr byval(%struct) %x)
|
|
ret i32 %r
|
|
}
|