| |
| # RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass aarch64-ldst-opt -verify-machineinstrs -o - %s | FileCheck %s |
| |
| --- | |
| define i1 @no-clobber-zr(i64* %p, i64 %x) { ret i1 0 } |
| ... |
| --- |
| # Check that write of xzr doesn't inhibit pairing of xzr stores since |
| # it isn't actually clobbered. Written as a MIR test to avoid |
| # schedulers reordering instructions such that SUBS doesn't appear |
| # between stores. |
| # CHECK-LABEL: name: no-clobber-zr |
| # CHECK: STPXi $xzr, $xzr, $x0, 0 |
| name: no-clobber-zr |
| body: | |
| bb.0: |
| liveins: $x0, $x1 |
| STRXui $xzr, $x0, 0 :: (store 8 into %ir.p) |
| dead $xzr = SUBSXri killed $x1, 0, 0, implicit-def $nzcv |
| $w8 = CSINCWr $wzr, $wzr, 1, implicit killed $nzcv |
| STRXui $xzr, killed $x0, 1 :: (store 8 into %ir.p) |
| $w0 = ORRWrs $wzr, killed $w8, 0 |
| RET $lr, implicit $w0 |
| ... |
| |
| |
| |
