mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 12:12:47 +01:00
eafdf66096
This reverts commit r222142. This is causing/exposing an execution-time regression in spec2006/gcc and coremark on AArch64/A57/Ofast. Conflicts: test/Transforms/Reassociate/optional-flags.ll llvm-svn: 222398
39 lines
1.1 KiB
LLVM
39 lines
1.1 KiB
LLVM
; RUN: opt < %s -reassociate -S | FileCheck %s
|
|
|
|
; When there is nothing to do, or not much to do, check that reassociate leaves
|
|
; things alone.
|
|
|
|
declare void @use(i32)
|
|
|
|
define void @test1(i32 %a, i32 %b) {
|
|
; Shouldn't change or move any of the add instructions. Should commute but
|
|
; otherwise not change or move any of the mul instructions.
|
|
; CHECK-LABEL: @test1(
|
|
%a0 = add nsw i32 %a, 1
|
|
; CHECK-NEXT: %a0 = add nsw i32 %a, 1
|
|
%m0 = mul nsw i32 3, %a
|
|
; CHECK-NEXT: %m0 = mul nsw i32 %a, 3
|
|
%a1 = add nsw i32 %a0, %b
|
|
; CHECK-NEXT: %a1 = add nsw i32 %a0, %b
|
|
%m1 = mul nsw i32 %b, %m0
|
|
; CHECK-NEXT: %m1 = mul nsw i32 %m0, %b
|
|
call void @use(i32 %a1)
|
|
; CHECK-NEXT: call void @use
|
|
call void @use(i32 %m1)
|
|
ret void
|
|
}
|
|
|
|
define void @test2(i32 %a, i32 %b, i32 %c, i32 %d) {
|
|
; The initial add doesn't change so should not lose the nsw flag.
|
|
; CHECK-LABEL: @test2(
|
|
%a0 = add nsw i32 %b, %a
|
|
; CHECK-NEXT: %a0 = add nsw i32 %b, %a
|
|
%a1 = add nsw i32 %a0, %d
|
|
; CHECK-NEXT: %a1 = add i32 %a0, %c
|
|
%a2 = add nsw i32 %a1, %c
|
|
; CHECK-NEXT: %a2 = add i32 %a1, %d
|
|
call void @use(i32 %a2)
|
|
; CHECK-NEXT: call void @use
|
|
ret void
|
|
}
|