forked from OSchip/llvm-project
46 lines
1.3 KiB
LLVM
46 lines
1.3 KiB
LLVM
; When optimising for minimum size, we don't want to expand a div to a mul
|
|
; and a shift sequence. As a result, the urem instruction e.g. will not be
|
|
; expanded to a sequence of umull, lsrs, muls and sub instructions, but
|
|
; just a call to __aeabi_uidivmod.
|
|
;
|
|
; RUN: llc -mtriple=armv7a-eabi -mattr=-neon -verify-machineinstrs %s -o - | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
|
|
target triple = "thumbv7m-arm-none-eabi"
|
|
|
|
define i32 @foo1() local_unnamed_addr #0 {
|
|
entry:
|
|
; CHECK-LABEL: foo1:
|
|
; CHECK:__aeabi_idiv
|
|
; CHECK-NOT: smmul
|
|
%call = tail call i32 bitcast (i32 (...)* @GetValue to i32 ()*)()
|
|
%div = sdiv i32 %call, 1000000
|
|
ret i32 %div
|
|
}
|
|
|
|
define i32 @foo2() local_unnamed_addr #0 {
|
|
entry:
|
|
; CHECK-LABEL: foo2:
|
|
; CHECK: __aeabi_uidiv
|
|
; CHECK-NOT: umull
|
|
%call = tail call i32 bitcast (i32 (...)* @GetValue to i32 ()*)()
|
|
%div = udiv i32 %call, 1000000
|
|
ret i32 %div
|
|
}
|
|
|
|
define i32 @foo3() local_unnamed_addr #0 {
|
|
entry:
|
|
; CHECK-LABEL: foo3:
|
|
; CHECK: __aeabi_uidivmod
|
|
; CHECK-NOT: umull
|
|
%call = tail call i32 bitcast (i32 (...)* @GetValue to i32 ()*)()
|
|
%rem = urem i32 %call, 1000000
|
|
%cmp = icmp eq i32 %rem, 0
|
|
%conv = zext i1 %cmp to i32
|
|
ret i32 %conv
|
|
}
|
|
|
|
declare i32 @GetValue(...) local_unnamed_addr
|
|
|
|
attributes #0 = { minsize nounwind optsize }
|