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llvm-mirror/test/CodeGen/Thumb/copy_thumb.ll
Artyom Skrobov 9e4b511e37 In Thumb1, materialize a move between low registers as a movs, if CPSR isn't live.
Summary: Previously, it had always been materialized as a push/pop sequence.

Reviewers: labrinea, jroelofs

Reviewed By: jroelofs

Subscribers: llvm-commits, rengolin

Differential Revision: https://reviews.llvm.org/D30648

llvm-svn: 297134
2017-03-07 09:38:16 +00:00

33 lines
1.4 KiB
LLVM

; RUN: llc -mtriple=armv4-none--eabi < %s | FileCheck %s --check-prefix=CHECK-LOLOMOV
; RUN: llc -mtriple=armv4t-none--eabi < %s | FileCheck %s --check-prefix=CHECK-LOLOMOV
; RUN: llc -mtriple=armv5-none--eabi < %s | FileCheck %s --check-prefix=CHECK-LOLOMOV
; RUN: llc -mtriple=armv6-none--eabi < %s | FileCheck %s --check-prefix=CHECK-LOLOMOV
; RUN: llc -mtriple=armv7-none--eabi < %s | FileCheck %s --check-prefix=CHECK-LOLOMOV
; RUN: llc -mtriple=thumbv6-none--eabi < %s | FileCheck %s --check-prefix=CHECK-LOLOMOV
; RUN: llc -mtriple=thumbv7-none--eabi < %s | FileCheck %s --check-prefix=CHECK-LOLOMOV
; CHECK-LOLOMOV-LABEL: foo
; CHECK-LOLOMOV: mov [[TMP:r[0-7]]], [[SRC1:r[01]]]
; CHECK-LOLOMOV-NEXT: mov [[SRC1]], [[SRC2:r[01]]]
; CHECK-LOLOMOV-NEXT: mov [[SRC2]], [[TMP]]
; CHECK-LOLOMOV-LABEL: bar
; CHECK-LOLOMOV-LABEL: fnend
;
; 'MOV lo, lo' in Thumb mode produces undefined results on pre-v6 hardware
; RUN: llc -mtriple=thumbv4t-none--eabi < %s | FileCheck %s --check-prefix=CHECK-NOLOLOMOV
; RUN: llc -mtriple=thumbv5-none--eabi < %s | FileCheck %s --check-prefix=CHECK-NOLOLOMOV
; CHECK-NOLOLOMOV-LABEL: foo
; CHECK-NOLOLOMOV: movs [[TMP:r[0-7]]], [[SRC1:r[01]]]
; CHECK-NOLOLOMOV-NEXT: movs [[SRC1]], [[SRC2:r[01]]]
; CHECK-NOLOLOMOV-NEXT: movs [[SRC2]], [[TMP]]
; CHECK-NOLOLOMOV-LABEL: bar
; CHECK-NOLOLOMOV-LABEL: fnend
declare void @bar(i32, i32)
define void @foo(i32 %a, i32 %b) {
entry:
call void @bar(i32 %b, i32 %a);
ret void
}