[llvm] [AArch64][GlobalISel] Use GPR for illegal fconstants and extend < 32 bit GPR constants to 32 bits (PR #178692)

[via llvm-commits]

github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 169017 tests passed
* 3022 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### LLVM
<details>
<summary>LLVM.CodeGen/AArch64/literal_pools_float.ll</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -verify-machineinstrs -o - /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/literal_pools_float.ll -mtriple=aarch64-none-linux-gnu -mcpu=cyclone | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/literal_pools_float.ll
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/llc -verify-machineinstrs -o - /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/literal_pools_float.ll -mtriple=aarch64-none-linux-gnu -mcpu=cyclone
# note: command had no output on stdout or stderr
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/literal_pools_float.ll
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/literal_pools_float.ll:102:15: error: CHECK-NEXT: expected string not found in input
# | ; CHECK-NEXT: adrp x8, .LCPI2_0
# |               ^
# | <stdin>:53:10: note: scanning from here
# | // %bb.0:
# |          ^
# | <stdin>:55:2: note: possible intended match here
# |  movk x8, #39322
# |  ^
# | 
# | Input file: <stdin>
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/test/CodeGen/AArch64/literal_pools_float.ll
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             .
# |             .
# |             .
# |            48:  .globl double_ret_optnone // -- Begin function double_ret_optnone 
# |            49:  .p2align 2 
# |            50:  .type double_ret_optnone, at function 
# |            51: double_ret_optnone: // @double_ret_optnone 
# |            52:  .cfi_startproc 
# |            53: // %bb.0: 
# | next:102'0              X error: no match found
# |            54:  mov x8, #-7378697629483820647 // =0x9999999999999999 
# | next:102'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            55:  movk x8, #39322 
# | next:102'0     ~~~~~~~~~~~~~~~~~
# | next:102'1      ?                possible intended match
# |            56:  movk x8, #16313, lsl #48 
# | next:102'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~
# |            57:  fmov d0, x8 
# | next:102'0     ~~~~~~~~~~~~~
# |            58:  ret 
# | next:102'0     ~~~~~
# |            59: .Lfunc_end2: 
# | next:102'0     ~~~~~~~~~~~~~
# |            60:  .size double_ret_optnone, .Lfunc_end2-double_ret_optnone 
# | next:102'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# |             .
# |             .
# |             .
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/178692