Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/CodeGen/X86/base-pointer-and-cmpxchg.ll

@@ -1,51 +0,0 @@
-; RUN: llc -mtriple=x86_64-apple-macosx -mattr=+cx16 -x86-use-base-pointer=true -stackrealign -stack-alignment=32  %s -o - | FileCheck --check-prefix=CHECK --check-prefix=USE_BASE --check-prefix=USE_BASE_64 %s
-; RUN: llc -mtriple=x86_64-apple-macosx -mattr=+cx16 -x86-use-base-pointer=false -stackrealign -stack-alignment=32  %s -o - | FileCheck --check-prefix=CHECK --check-prefix=DONT_USE_BASE %s
-; RUN: llc -mtriple=x86_64-linux-gnux32 -mattr=+cx16 -x86-use-base-pointer=true -stackrealign -stack-alignment=32  %s -o - | FileCheck --check-prefix=CHECK --check-prefix=USE_BASE --check-prefix=USE_BASE_32 %s
-; RUN: llc -mtriple=x86_64-linux-gnux32 -mattr=+cx16 -x86-use-base-pointer=false -stackrealign -stack-alignment=32  %s -o - | FileCheck --check-prefix=CHECK --check-prefix=DONT_USE_BASE %s
-
-; This function uses dynamic allocated stack to force the use
-; of a frame pointer.
-; The inline asm clobbers a bunch of registers to make sure
-; the frame pointer will need to be used (for spilling in that case).
-;
-; Then, we check that when we use rbx as the base pointer,
-; we do not use cmpxchg, since using that instruction requires
-; to clobbers rbx to set the arguments of the instruction and when
-; rbx is used as the base pointer, RA cannot fix the code for us.
-;
-; CHECK-LABEL: cmp_and_swap16:
-; Check that we actually use rbx.
-; gnux32 use the 32bit variant of the registers.
-; USE_BASE_64: movq %rsp, %rbx
-; USE_BASE_32: movl %esp, %ebx
-;
-; Make sure the base pointer is saved before the rbx argument for
-; cmpxchg16b is set.
-;
-; Because of how the test is written, we spill SAVE_rbx.
-; However, it would have been perfectly fine to just keep it in register.
-; USE_BASE: movq %rbx, [[SAVE_rbx_SLOT:[0-9]*\(%[er]bx\)]]
-;
-; SAVE_rbx must be in register before we clobber rbx.
-; It is fine to use any register but rbx and the ones defined and use
-; by cmpxchg. Since such regex would be complicated to write, just stick
-; to the numbered registers. The bottom line is: if this test case fails
-; because of that regex, this is likely just the regex being too conservative. 
-; USE_BASE: movq [[SAVE_rbx_SLOT]], [[SAVE_rbx:%r[0-9]+]]
-;
-; USE_BASE: movq {{[^ ]+}}, %rbx
-; USE_BASE-NEXT: cmpxchg16b
-; USE_BASE-NEXT: movq [[SAVE_rbx]], %rbx
-;
-; DONT_USE_BASE-NOT: movq %rsp, %rbx
-; DONT_USE_BASE-NOT: movl %esp, %ebx
-; DONT_USE_BASE: cmpxchg
-define i1 @cmp_and_swap16(i128 %a, i128 %b, i128* %addr, i32 %n) {
-  %dummy = alloca i32, i32 %n
-tail call void asm sideeffect "nop", "~{rax},~{rcx},~{rdx},~{rsi},~{rdi},~{rbp},~{r8},~{r9},~{r10},~{r11},~{r12},~{r13},~{r14},~{r15}"()
-  %cmp = cmpxchg i128* %addr, i128 %a, i128 %b seq_cst seq_cst
-  %res = extractvalue { i128, i1 } %cmp, 1
-  %idx = getelementptr i32, i32* %dummy, i32 5
-  store i32 %n, i32* %idx
-  ret i1 %res
-}