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ARM: use divmod libcalls on embedded MachO platforms too.

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The separated libcalls are implemented in terms of __divmodsi4 and __udivmodsi4
anyway, so we should always use them if possible.

llvm-svn: 302462
This commit is contained in:
Tim Northover 2017-05-08 20:00:14 +00:00
parent e681620142
commit a310a0689f
3 changed files with 39 additions and 41 deletions
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6
lib/Target/ARM/ARMISelLowering.cpp
View File

@ -473,9 +473,9 @@ ARMTargetLowering::ARMTargetLowering(const TargetMachine &TM,
}
// Use divmod compiler-rt calls for iOS 5.0 and later.
if (Subtarget->isTargetWatchOS() ||
(Subtarget->isTargetIOS() &&
!Subtarget->getTargetTriple().isOSVersionLT(5, 0))) {
if (Subtarget->isTargetMachO() &&
!(Subtarget->isTargetIOS() &&
Subtarget->getTargetTriple().isOSVersionLT(5, 0))) {
setLibcallName(RTLIB::SDIVREM_I32, "__divmodsi4");
setLibcallName(RTLIB::UDIVREM_I32, "__udivmodsi4");
}

73
test/CodeGen/ARM/divmod-eabi.ll
View File

@ -16,17 +16,15 @@
; RUN: llc -mtriple armv7-linux-gnueabi %s -o - -O0 -optimize-regalloc | FileCheck %s --check-prefix=EABI
; RUN: llc -mtriple armv7-linux-musleabi %s -o - | FileCheck %s --check-prefix=EABI
; RUN: llc -mtriple armv7-linux-musleabi %s -o - -O0 -optimize-regalloc | FileCheck %s --check-prefix=EABI
; RUN: llc -mtriple armv7-apple-darwin %s -o - | FileCheck %s --check-prefixes=DARWIN,DARWIN-DEFAULT
; RUN: llc -mtriple armv7-apple-darwin %s -o - -O0 -optimize-regalloc | FileCheck %s --check-prefixes=DARWIN,DARWIN-O0
; FIXME: long-term, we will use "-apple-macho" and won't need this exception:
; RUN: llc -mtriple armv7-apple-darwin-eabi %s -o - | FileCheck %s --check-prefixes=DARWIN,DARWIN-DEFAULT
; RUN: llc -mtriple armv7-apple-darwin-eabi %s -o - -O0 -optimize-regalloc | FileCheck %s --check-prefixes=DARWIN,DARWIN-O0
; RUN: llc -mtriple armv7-apple-darwin %s -o - | FileCheck %s --check-prefixes=DARWIN
; RUN: llc -mtriple armv7-apple-darwin %s -o - -O0 -optimize-regalloc | FileCheck %s --check-prefix=DARWIN-O0
; RUN: llc -mtriple thumbv7-windows %s -o - | FileCheck %s --check-prefixes=WINDOWS,WINDOWS-DEFAULT
; RUN: llc -mtriple thumbv7-windows %s -o - -O0 -optimize-regalloc | FileCheck %s --check-prefixes=WINDOWS,WINDOWS-O0
define signext i16 @f16(i16 signext %a, i16 signext %b) {
; EABI-LABEL: f16:
; DARWIN-LABEL: f16:
; DARWIN-O0-LABEL: f16:
; WINDOWS-LABEL: f16:
entry:
%conv = sext i16 %a to i32
@ -36,11 +34,9 @@ entry:
; EABI: __aeabi_idivmod
; EABI: mov [[div:r[0-9]+]], r0
; EABI: mov [[rem:r[0-9]+]], r1
; DARWIN: ___divsi3
; DARWIN: mov [[div:r[0-9]+]], r0
; DARWIN: __modsi3
; DARWIN-DEFAULT: add [[sum:r[0-9]+]], r0, [[div]]
; DARWIN-O0: mov [[rem:r[0-9]+]], r0
; DARWIN: __divmodsi4
; DARWIN-O0: __divsi3
; DARWIN-O0: __modsi3
; WINDOWS: __rt_sdiv
; WINDOWS: __rt_sdiv
; WINDOWS-DEFAULT: add [[sum:r[0-9]+]], r1
@ -48,16 +44,13 @@ entry:
%rem8 = srem i32 %conv1, %conv
; EABI: __aeabi_idivmod
; DARWIN: __modsi3
; DARWIN-O0: __modsi3
; WINDOWS: __rt_sdiv
%add = add nsw i32 %rem, %div
%add13 = add nsw i32 %add, %rem8
%conv14 = trunc i32 %add13 to i16
; EABI: add r0{{.*}}r1
; EABI: sxth r0, r0
; DARWIN-DEFAULT: add [[res:r[0-9]+]], [[sum]], r0
; DARWIN-O0: add [[sum:r[0-9]+]], [[rem]], [[div]]
; DARWIN-O0: add [[res:r[0-9]+]], [[sum]], r0
; DARWIN: sxth r0, [[res]]
; WINDOWS-DEFAULT: adds [[sum1:r[0-9]+]], [[sum]], r1
; WINDOWS-O0: adds [[sum:r[0-9]+]], [[rem]],
; WINDOWS-O0: add [[sum1:r[0-9]+]], r1
@ -68,6 +61,7 @@ entry:
define i32 @f32(i32 %a, i32 %b) {
; EABI-LABEL: f32:
; DARWIN-LABEL: f32:
; DARWIN-O0-LABEL: f32:
; WINDOWS-LABEL: f32:
entry:
%div = sdiv i32 %a, %b
@ -75,11 +69,9 @@ entry:
; EABI: __aeabi_idivmod
; EABI: mov [[div:r[0-9]+]], r0
; EABI: mov [[rem:r[0-9]+]], r1
; DARWIN: ___divsi3
; DARWIN: mov [[div:r[0-9]+]], r0
; DARWIN: __modsi3
; DARWIN-DEFAULT: add [[sum:r[0-9]+]], r0, [[div]]
; DARWIN-O0: mov [[rem:r[0-9]+]], r0
; DARWIN: ___divmodsi4
; DARWIN-O0: __divsi3
; DARWIN-O0: __modsi3
; WINDOWS: __rt_sdiv
; WINDOWS: mov [[div:r[0-9]+]], r0
; WINDOWS: __rt_sdiv
@ -87,13 +79,11 @@ entry:
%rem1 = srem i32 %b, %a
; EABI: __aeabi_idivmod
; DARWIN: __modsi3
; DARWIN-O0: __modsi3
; WINDOWS: __rt_sdiv
%add = add nsw i32 %rem, %div
%add2 = add nsw i32 %add, %rem1
; EABI: add r0{{.*}}r1
; DARWIN-DEFAULT: add r0, [[sum]], r0
; DARWIN-O0: add [[sum:r[0-9]+]], [[rem]], [[div]]
; DARWIN-O0: add [[res:r[0-9]+]], [[sum]], r0
; WINDOWS-DEFAULT: adds r0, [[div]], r1
; WINDOWS-O0: adds [[sum:r[0-9]+]], [[rem]], [[div]]
; WINDOWS-O0: add [[sum]], r1
@ -103,16 +93,15 @@ entry:
define i32 @uf(i32 %a, i32 %b) {
; EABI-LABEL: uf:
; DARWIN-LABEL: uf:
; DARWIN-O0-LABEL: uf:
; WINDOWS-LABEL: uf:
entry:
%div = udiv i32 %a, %b
%rem = urem i32 %a, %b
; EABI: __aeabi_uidivmod
; DARWIN: ___udivsi3
; DARWIN: mov [[div:r[0-9]+]], r0
; DARWIN: __umodsi3
; DARWIN-DEFAULT: add [[sum:r[0-9]+]], r0, [[div]]
; DARWIN-O0: mov [[rem:r[0-9]+]], r0
; DARWIN: __udivmodsi4
; DARWIN-O0: __udivsi3
; DARWIN-O0: __umodsi3
; WINDOWS: __rt_udiv
; WINDOWS: mov [[div:r[0-9]+]], r0
; WINDOWS: __rt_udiv
@ -120,13 +109,11 @@ entry:
%rem1 = urem i32 %b, %a
; EABI: __aeabi_uidivmod
; DARWIN: __umodsi3
; DARWIN-O0: __umodsi3
; WINDOWS: __rt_udiv
%add = add nuw i32 %rem, %div
%add2 = add nuw i32 %add, %rem1
; EABI: add r0{{.*}}r1
; DARWIN-DEFAULT: add r0, [[sum]], r0
; DARWIN-O0: add [[sum:r[0-9]+]], [[rem]], [[div]]
; DARWIN-O0: add [[res:r[0-9]+]], [[sum]], r0
; WINDOWS-DEFAULT: adds [[sum:r[0-9]+]], [[div]], r1
; WINDOWS-O0: adds [[sum:r[0-9]+]],
; WINDOWS-O0: add [[sum]], r1
@ -136,6 +123,7 @@ entry:
define i64 @longf(i64 %a, i64 %b) {
; EABI-LABEL: longf:
; DARWIN-LABEL: longf:
; DARWIN-O0-LABEL: longf:
; WINDOWS-LABEL: longf:
entry:
%div = sdiv i64 %a, %b
@ -148,6 +136,8 @@ entry:
; DARWIN: mov [[div1:r[0-9]+]], r0
; DARWIN: mov [[div2:r[0-9]+]], r1
; DARWIN: __moddi3
; DARWIN-O0: __divdi3
; DARWIN-O0: __moddi3
; WINDOWS: __rt_sdiv64
%add = add nsw i64 %rem, %div
; DARWIN: adds r0{{.*}}[[div1]]
@ -160,20 +150,19 @@ entry:
define i16 @shortf(i16 %a, i16 %b) {
; EABI-LABEL: shortf:
; DARWIN-LABEL: shortf:
; DARWIN-O0-LABEL: shortf:
; WINDOWS-LABEL: shortf:
entry:
%div = sdiv i16 %a, %b
%rem = srem i16 %a, %b
; EABI: __aeabi_idivmod
; DARWIN: ___divsi3
; DARWIN: mov [[div1:r[0-9]+]], r0
; DARWIN: __modsi3
; DARWIN: ___divmodsi4
; DARWIN-O0: __divmodsi4
; WINDOWS: __rt_sdiv
; WINDOWS: mov [[div:r[0-9]+]], r0
; WINDOWS: __rt_sdiv
%add = add nsw i16 %rem, %div
; EABI: add r0, r1
; DARWIN: add r0{{.*}}[[div1]]
; WINDOWS: adds r0, r1, [[div]]
ret i16 %add
}
@ -181,20 +170,20 @@ entry:
define i32 @g1(i32 %a, i32 %b) {
; EABI-LABEL: g1:
; DARWIN-LABEL: g1:
; DARWIN-O0-LABEL: g1:
; WINDOWS-LABEL: g1:
entry:
%div = sdiv i32 %a, %b
%rem = srem i32 %a, %b
; EABI: __aeabi_idivmod
; DARWIN: ___divsi3
; DARWIN: mov [[sum:r[0-9]+]], r0
; DARWIN: __modsi3
; DARWIN: ___divmodsi4
; DARWIN-O0: __divsi3
; DARWIN-O0: __modsi3
; WINDOWS: __rt_sdiv
; WINDOWS: mov [[div:r[0-9]+]], r0
; WINDOWS: __rt_sdiv
%add = add nsw i32 %rem, %div
; EABI: add r0{{.*}}r1
; DARWIN: add r0{{.*}}[[sum]]
; WINDOWS: adds r0, r1, [[div]]
ret i32 %add
}
@ -203,11 +192,13 @@ entry:
define i32 @g2(i32 %a, i32 %b) {
; EABI-LABEL: g2:
; DARWIN-LABEL: g2:
; DARWIN-O0-LABEL: g2:
; WINDOWS-LABEL: g2:
entry:
%rem = srem i32 %a, %b
; EABI: __aeabi_idivmod
; DARWIN: __modsi3
; DARWIN-O0: __modsi3
; WINDOWS: __rt_sdiv
ret i32 %rem
; EABI: mov r0, r1
@ -217,6 +208,7 @@ entry:
define i32 @g3(i32 %a, i32 %b) {
; EABI-LABEL: g3:
; DARWIN-LABEL: g3:
; DARWIN-O0-LABEL: g3:
; WINDOWS-LABEL: g3:
entry:
%rem = srem i32 %a, %b
@ -224,11 +216,13 @@ entry:
; EABI: mov [[mod:r[0-9]+]], r1
; DARWIN: __modsi3
; DARWIN: mov [[sum:r[0-9]+]], r0
; DARWIN-O0: __modsi3
; WINDOWS: __rt_sdiv
; WINDOWS: mov [[rem:r[0-9]+]], r1
%rem1 = srem i32 %b, %rem
; EABI: __aeabi_idivmod
; DARWIN: __modsi3
; DARWIN-O0: __modsi3
; WINDOWS: __rt_sdiv
%add = add nsw i32 %rem1, %rem
; EABI: add r0, r1, [[mod]]
@ -240,6 +234,7 @@ entry:
define i32 @g4(i32 %a, i32 %b) {
; EABI-LABEL: g4:
; DARWIN-LABEL: g4:
; DARWIN-O0-LABEL: g4:
; WINDOWS-LABEL: g4:
entry:
%div = sdiv i32 %a, %b
@ -247,11 +242,13 @@ entry:
; EABI: mov [[div:r[0-9]+]], r0
; DARWIN: ___divsi3
; DARWIN: mov [[sum:r[0-9]+]], r0
; DARWIN-O0: __divsi3
; WINDOWS: __rt_sdiv
; WINDOWS: mov [[div:r[0-9]+]], r0
%rem = srem i32 %b, %div
; EABI: __aeabi_idivmod
; DARWIN: __modsi3
; DARWIN-O0: __modsi3
; WINDOWS: __rt_sdiv
%add = add nsw i32 %rem, %div
; EABI: add r0, r1, [[div]]

1
test/CodeGen/ARM/divmod.ll
View File

@ -1,5 +1,6 @@
; RUN: llc < %s -mtriple=arm-apple-ios5.0 -mcpu=cortex-a8 | FileCheck %s -check-prefix=A8
; RUN: llc < %s -mtriple=arm-apple-ios5.0 -mcpu=swift | FileCheck %s -check-prefix=SWIFT
; RUN: llc < %s -mtriple=thumbv7-apple-macho -mcpu=cortex-a8 | FileCheck %s -check-prefix=A8
; rdar://12481395