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[AArch64] Don't generate libcalls for wide shifts on Darwin 

Similar to cff90f07cb.

Darwin doesn't always use compiler-rt, and so we can't assume that these
functions are available (at least on arm64).
This commit is contained in:
Jessica Paquette 2020-01-10 15:46:52 -08:00
parent 1b8c84b8dd
commit ceb801612a
2 changed files with 6 additions and 1 deletions
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2
llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
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@ -13102,7 +13102,7 @@ bool AArch64TargetLowering::
bool AArch64TargetLowering::shouldExpandShift(SelectionDAG &DAG,
SDNode *N) const {
if (DAG.getMachineFunction().getFunction().hasMinSize() &&
!Subtarget->isTargetWindows())
!Subtarget->isTargetWindows() && !Subtarget->isTargetDarwin())
return false;
return true;
}

5
llvm/test/CodeGen/AArch64/shift_minsize.ll
View File

@ -1,11 +1,16 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=aarch64-unknown-unknown | FileCheck %s
; RUN: llc < %s -mtriple=aarch64-windows | 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: __ashlti3
; CHECK-WIN-NOT: __ashrti3
; 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: // %bb.0: