[ARM] Test to show incorrect pointer info. NFC

diff --git a/llvm/test/CodeGen/Thumb2/vmovdrroffset.ll b/llvm/test/CodeGen/Thumb2/vmovdrroffset.ll
new file mode 100644 (file)
index 0000000..07656e6
--- /dev/null
+++ b/llvm/test/CodeGen/Thumb2/vmovdrroffset.ll
@@ -0,0 +1,51 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=thumbv8.1m.main-none-none-eabi -mattr=+mve %s -o - | FileCheck %s
+
+; This test was getting the offset of a store's pointer info incorrect, leading to the
+; incorrect aliasing info an the store moving past a dependant load.
+
+define arm_aapcs_vfpcc double @zero(double %a, double %b, double %c) {
+; CHECK-LABEL: zero:
+; CHECK:       @ %bb.0: @ %entry
+; CHECK-NEXT:    .save {r4, lr}
+; CHECK-NEXT:    push {r4, lr}
+; CHECK-NEXT:    .vsave {d8, d9}
+; CHECK-NEXT:    vpush {d8, d9}
+; CHECK-NEXT:    .pad #8
+; CHECK-NEXT:    sub sp, #8
+; CHECK-NEXT:    vmov.f32 s16, s2
+; CHECK-NEXT:    vmov.f32 s18, s0
+; CHECK-NEXT:    vmov.f32 s17, s3
+; CHECK-NEXT:    vmov.f32 s19, s1
+; CHECK-NEXT:    bl sqrt
+; CHECK-NEXT:    vmov r2, r3, d8
+; CHECK-NEXT:    vmov r0, r1, d0
+; CHECK-NEXT:    bl __aeabi_dadd
+; CHECK-NEXT:    mov r4, r0
+; CHECK-NEXT:    ldrb.w r0, [sp, #7]
+; CHECK-NEXT:    str r1, [sp, #4]
+; CHECK-NEXT:    eor r0, r0, #128
+; CHECK-NEXT:    strb.w r0, [sp, #7]
+; CHECK-NEXT:    vmov r0, r1, d9
+; CHECK-NEXT:    mov r2, r0
+; CHECK-NEXT:    mov r3, r1
+; CHECK-NEXT:    bl __aeabi_dadd
+; CHECK-NEXT:    mov r3, r1
+; CHECK-NEXT:    ldr r1, [sp, #4]
+; CHECK-NEXT:    mov r2, r0
+; CHECK-NEXT:    mov r0, r4
+; CHECK-NEXT:    bl __aeabi_ddiv
+; CHECK-NEXT:    vmov d0, r0, r1
+; CHECK-NEXT:    add sp, #8
+; CHECK-NEXT:    vpop {d8, d9}
+; CHECK-NEXT:    pop {r4, pc}
+entry:
+  %call = tail call nnan nsz arm_aapcs_vfpcc double @sqrt(double %a)
+  %0 = fadd nnan nsz double %call, %b
+  %sub3 = fneg nnan nsz double %0
+  %mul4 = fmul nnan nsz double %a, 2.000000e+00
+  %div = fdiv nnan nsz double %sub3, %mul4
+  ret double %div
+}
+
+declare arm_aapcs_vfpcc double @sqrt(double)