[PowerPC] Precommit test case for PR46759. NFC.

Author: Kai Luo

llvm/test/CodeGen/PowerPC/pr46759.ll

@@ -0,0 +1,58 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -ppc-asm-full-reg-names -verify-machineinstrs \
+; RUN:   -mtriple=powerpc64le-linux-gnu < %s | FileCheck \
+; RUN:   -check-prefix=CHECK-LE %s
+
+define void @foo(i32 %vla_size) #0 {
+; CHECK-LE-LABEL: foo:
+; CHECK-LE:       # %bb.0: # %entry
+; CHECK-LE-NEXT:    std r31, -8(r1)
+; CHECK-LE-NEXT:    std r30, -16(r1)
+; CHECK-LE-NEXT:    mr r30, r1
+; CHECK-LE-NEXT:    mr r12, r1
+; CHECK-LE-NEXT:    .cfi_def_cfa r12, 0
+; CHECK-LE-NEXT:    clrldi r0, r12, 53
+; CHECK-LE-NEXT:    stdux r12, r1, r0
+; CHECK-LE-NEXT:    stdu r12, -2048(r1)
+; CHECK-LE-NEXT:    stdu r12, -4096(r1)
+; CHECK-LE-NEXT:    .cfi_def_cfa_register r1
+; CHECK-LE-NEXT:    .cfi_def_cfa_register r30
+; CHECK-LE-NEXT:    .cfi_offset r31, -8
+; CHECK-LE-NEXT:    .cfi_offset r30, -16
+; CHECK-LE-NEXT:    clrldi r3, r3, 32
+; CHECK-LE-NEXT:    li r6, -4096
+; CHECK-LE-NEXT:    ld r4, 0(r1)
+; CHECK-LE-NEXT:    mr r31, r1
+; CHECK-LE-NEXT:    addi r3, r3, 15
+; CHECK-LE-NEXT:    rldicl r3, r3, 60, 4
+; CHECK-LE-NEXT:    rldicl r3, r3, 4, 31
+; CHECK-LE-NEXT:    neg r5, r3
+; CHECK-LE-NEXT:    li r3, -2048
+; CHECK-LE-NEXT:    divd r7, r5, r6
+; CHECK-LE-NEXT:    and r3, r5, r3
+; CHECK-LE-NEXT:    add r3, r1, r3
+; CHECK-LE-NEXT:    mulld r6, r7, r6
+; CHECK-LE-NEXT:    sub r5, r5, r6
+; CHECK-LE-NEXT:    stdux r4, r1, r5
+; CHECK-LE-NEXT:    cmpd r1, r3
+; CHECK-LE-NEXT:    beq cr0, .LBB0_2
+; CHECK-LE-NEXT:  .LBB0_1: # %entry
+; CHECK-LE-NEXT:    #
+; CHECK-LE-NEXT:    stdu r4, -4096(r1)
+; CHECK-LE-NEXT:    cmpd r1, r3
+; CHECK-LE-NEXT:    bne cr0, .LBB0_1
+; CHECK-LE-NEXT:  .LBB0_2: # %entry
+; CHECK-LE-NEXT:    addi r3, r1, 2048
+; CHECK-LE-NEXT:    lbz r3, 0(r3)
+; CHECK-LE-NEXT:    ld r1, 0(r1)
+; CHECK-LE-NEXT:    ld r31, -8(r1)
+; CHECK-LE-NEXT:    ld r30, -16(r1)
+; CHECK-LE-NEXT:    blr
+entry:
+  %0 = zext i32 %vla_size to i64
+  %vla = alloca i8, i64 %0, align 2048
+  %1 = load volatile i8, i8* %vla, align 2048
+  ret void
+}
+
+attributes #0 = { "probe-stack"="inline-asm" }