[PATCH] D131427: [ARM] Do not use LOAD_STACK_GUARD with ROPI/RWPI
Pengxuan Zheng via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Aug 9 14:59:22 PDT 2022
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG9bb66224239e: [ARM] Do not use LOAD_STACK_GUARD with ROPI/RWPI (authored by pzheng).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D131427/new/
https://reviews.llvm.org/D131427
Files:
llvm/lib/Target/ARM/ARMISelLowering.cpp
llvm/test/CodeGen/ARM/stack-guard-rwpi.ll
Index: llvm/test/CodeGen/ARM/stack-guard-rwpi.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/ARM/stack-guard-rwpi.ll
@@ -0,0 +1,28 @@
+; RUN: llc -mtriple=arm-- --relocation-model=rwpi %s -o - | \
+; RUN: FileCheck %s --check-prefixes=RWPI
+; RUN: llc -mtriple=arm-- --relocation-model=ropi %s -o - | \
+; RUN: FileCheck %s --check-prefixes=ROPI
+; RUN: llc -mtriple=arm-- --relocation-model=pic %s -o - | \
+; RUN: FileCheck %s --check-prefixes=PIC
+
+; RWPI: ldr {{r[0-9]+}}, .LCPI0_0
+; RWPI: .LCPI0_0:
+; RWPI-NEXT: .long __stack_chk_guard(sbrel)
+
+; ROPI: ldr {{r[0-9]+}}, .LCPI0_0
+; ROPI: .LCPI0_0:
+; ROPI-NEXT: .long __stack_chk_guard
+
+; PIC: ldr {{r[0-9]+}}, .LCPI0_0
+; PIC: .LCPI0_0:
+; PIC-NEXT: .Ltmp0:
+; PIC-NEXT: .long __stack_chk_guard(GOT_PREL)-((.LPC0_0+8)-.Ltmp0)
+
+define dso_local i32 @foo(i32 %t) nounwind sspstrong {
+entry:
+ %vla = alloca i32, i32 %t
+ %call = call i32 @baz(i32* %vla)
+ ret i32 %call
+}
+
+declare dso_local i32 @baz(i32*)
Index: llvm/lib/Target/ARM/ARMISelLowering.cpp
===================================================================
--- llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -21106,7 +21106,10 @@
return InsertFencesForAtomic;
}
-bool ARMTargetLowering::useLoadStackGuardNode() const { return true; }
+bool ARMTargetLowering::useLoadStackGuardNode() const {
+ // ROPI/RWPI are not supported currently.
+ return !Subtarget->isROPI() && !Subtarget->isRWPI();
+}
void ARMTargetLowering::insertSSPDeclarations(Module &M) const {
if (!Subtarget->getTargetTriple().isWindowsMSVCEnvironment())
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