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[arm][darwin] Don't generate libcalls for wide shifts on Darwin

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Similar to ceb801612a678bdffe7e7bf163bd0eed9c9b73a2.

Darwin doesn't always use compiler-rt, and so we can't assume that these
functions are available on arm.
This commit is contained in:
Alex Lorenz 2020-06-05 15:40:00 -07:00
parent ecc953fc36
commit e8f8b62f7f
2 changed files with 7 additions and 1 deletions
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3
lib/Target/ARM/ARMISelLowering.cpp
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@ -17958,7 +17958,8 @@ bool ARMTargetLowering::isCheapToSpeculateCtlz() const {
}
bool ARMTargetLowering::shouldExpandShift(SelectionDAG &DAG, SDNode *N) const {
return !Subtarget->hasMinSize() || Subtarget->isTargetWindows();
return !Subtarget->hasMinSize() || Subtarget->isTargetWindows() ||
Subtarget->isTargetDarwin();
}
Value *ARMTargetLowering::emitLoadLinked(IRBuilder<> &Builder, Value *Addr,

5
test/CodeGen/ARM/shift_minsize.ll
View File

@ -1,11 +1,16 @@
; RUN: llc -mtriple=arm-eabi %s -o - | FileCheck %s
; RUN: llc -mtriple=thumbv7-windows %s -o - | FileCheck %s -check-prefix=CHECK-WIN
; RUN: llc < %s -mtriple=aarch64-apple-darwin | FileCheck %s -check-prefix=CHECK-DARWIN
; The Windows runtime doesn't have these.
; CHECK-WIN-NOT: __ashldi3
; CHECK-WIN-NOT: __ashrdi3
; CHECK-WIN-NOT: __lshrdi3
; Darwin compiler-rt excludes these.
; CHECK-DARWIN-NOT: __ashlti3
; CHECK-DARWIN-NOT: __ashrti3
define i64 @f0(i64 %val, i64 %amt) minsize optsize {
; CHECK-LABEL: f0:
; CHECK: bl __aeabi_llsl