mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-30 02:32:08 +00:00
4d96c638af
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125259 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
1.0 KiB
LLVM
37 lines
1.0 KiB
LLVM
;; X's live range extends beyond the shift, so the register allocator
|
|
;; cannot coalesce it with Y. Because of this, a copy needs to be
|
|
;; emitted before the shift to save the register value before it is
|
|
;; clobbered. However, this copy is not needed if the register
|
|
;; allocator turns the shift into an LEA. This also occurs for ADD.
|
|
|
|
; Check that the shift gets turned into an LEA.
|
|
; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
|
|
|
|
@G = external global i32
|
|
|
|
define i32 @test1(i32 %X) nounwind {
|
|
; CHECK: test1:
|
|
; CHECK-NOT: mov
|
|
; CHECK: leal 1(%rdi)
|
|
%Z = add i32 %X, 1
|
|
volatile store i32 %Z, i32* @G
|
|
ret i32 %X
|
|
}
|
|
|
|
; rdar://8977508
|
|
; The second add should not be transformed to leal nor should it be
|
|
; commutted (which would require inserting a copy).
|
|
define i32 @test2(i32 inreg %a, i32 inreg %b, i32 %c, i32 %d) nounwind {
|
|
entry:
|
|
; CHECK: test2:
|
|
; CHECK: leal
|
|
; CHECK-NOT: leal
|
|
; CHECK-NOT: mov
|
|
; CHECK-NEXT: addl
|
|
; CHECK-NEXT: ret
|
|
%add = add i32 %b, %a
|
|
%add3 = add i32 %add, %c
|
|
%add5 = add i32 %add3, %d
|
|
ret i32 %add5
|
|
}
|