[x86/SLH][NFC] Add a test to produce a failed generation.

diff --git a/llvm/test/CodeGen/X86/speculative-load-hardening-no-spill.ll b/llvm/test/CodeGen/X86/speculative-load-hardening-no-spill.ll
new file mode 100644 (file)
index 0000000..bfc2846
--- /dev/null
+++ b/llvm/test/CodeGen/X86/speculative-load-hardening-no-spill.ll
@@ -0,0 +1,15 @@
+; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -x86-speculative-load-hardening | FileCheck %s
+
+define i32 @foo(void ()** %0) {
+; CHECK-LABEL: foo:
+; CHECK-NOT:    .Lslh_ret_addr0:
+; CHECK:         callq *(%{{.*}})
+; CHECK-NEXT:    movq %rsp, %rcx
+; CHECK-NEXT:    movq -{{[0-9]+}}(%rsp), %rax
+; CHECK-NEXT:    sarq $63, %rcx
+; CHECK-NEXT:    cmpq $.Lslh_ret_addr0, %rax
+  %2 = load void ()*, void ()** %0
+  call void asm sideeffect "", "~{bx},~{cx},~{dx},~{bp},~{si},~{di},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15},~{dirflag},~{fpsr},~{flags}"()
+  call void %2()
+  ret i32 0
+}