NumBytes = 0;
if (RealignmentPadding > 0) {
- BuildMI(MBB, MBBI, DL, TII->get(AArch64::ADDXri), AArch64::X15)
- .addReg(AArch64::SP)
- .addImm(RealignmentPadding)
- .addImm(0);
+ if (RealignmentPadding >= 4096) {
+ BuildMI(MBB, MBBI, DL, TII->get(AArch64::MOVi64imm))
+ .addReg(AArch64::X16, RegState::Define)
+ .addImm(RealignmentPadding)
+ .setMIFlags(MachineInstr::FrameSetup);
+ BuildMI(MBB, MBBI, DL, TII->get(AArch64::ADDXrr), AArch64::X15)
+ .addReg(AArch64::SP)
+ .addReg(AArch64::X16, RegState::Kill)
+ .setMIFlag(MachineInstr::FrameSetup);
+ } else {
+ BuildMI(MBB, MBBI, DL, TII->get(AArch64::ADDXri), AArch64::X15)
+ .addReg(AArch64::SP)
+ .addImm(RealignmentPadding)
+ .addImm(0)
+ .setMIFlag(MachineInstr::FrameSetup);
+ }
uint64_t AndMask = ~(MFI.getMaxAlign().value() - 1);
BuildMI(MBB, MBBI, DL, TII->get(AArch64::ANDXri), AArch64::SP)
; CHECK-NEXT: sub sp, sp, x15, lsl #4
; CHECK-NEXT: add x15, sp, #16
; CHECK-NEXT: and sp, x15, #0xffffffffffffffe0
+
+define dso_local void @func2() {
+entry:
+ %buf = alloca [8192 x i8], align 8192
+ %arraydecay = getelementptr inbounds [8192 x i8], ptr %buf, i64 0, i64 0
+ call void @other(ptr noundef %arraydecay)
+ ret void
+}
+
+; CHECK-LABEL: func2:
+; CHECK-NEXT: .seh_proc func2
+; CHECK-NEXT: // %bb.0:
+; CHECK-NEXT: str x28, [sp, #-32]!
+; CHECK-NEXT: .seh_save_reg_x x28, 32
+; CHECK-NEXT: stp x29, x30, [sp, #8]
+; CHECK-NEXT: .seh_save_fplr 8
+; CHECK-NEXT: add x29, sp, #8
+; CHECK-NEXT: .seh_add_fp 8
+; CHECK-NEXT: .seh_endprologue
+; CHECK-NEXT: mov x15, #1533
+; CHECK-NEXT: bl __chkstk
+; CHECK-NEXT: sub sp, sp, x15, lsl #4
+; CHECK-NEXT: mov x16, #8176
+; CHECK-NEXT: add x15, sp, x16
+; CHECK-NEXT: and sp, x15, #0xffffffffffffe000