[llvm] [AMDGPU] Use immediates for stack accesses in chain funcs (PR #71913)

[via llvm-commits]

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@@ -807,9 +866,8 @@ define amdgpu_cs_chain void @amdgpu_cs_chain_dont_realign_stack(i32 %idx) {
 ; GISEL-GFX11-NEXT:    s_mov_b32 s1, 2
 ; GISEL-GFX11-NEXT:    s_mov_b32 s0, 1
 ; GISEL-GFX11-NEXT:    v_lshlrev_b32_e32 v0, 4, v8
-; GISEL-GFX11-NEXT:    s_mov_b32 s32, 0
-; GISEL-GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1) | instid1(SALU_CYCLE_1)
-; GISEL-GFX11-NEXT:    v_add_nc_u32_e32 v4, s32, v0
+; GISEL-GFX11-NEXT:    s_delay_alu instid0(VALU_DEP_1)
+; GISEL-GFX11-NEXT:    v_add_nc_u32_e32 v4, 32, v0
 ; GISEL-GFX11-NEXT:    v_dual_mov_b32 v0, s0 :: v_dual_mov_b32 v3, s3
 ; GISEL-GFX11-NEXT:    v_dual_mov_b32 v1, s1 :: v_dual_mov_b32 v2, s2
 ; GISEL-GFX11-NEXT:    scratch_store_b128 v4, v[0:3], off dlc
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ruiling wrote:

If the `Add` has NoUnsignedWrap being set, it will be folded. Will double check this later.

https://github.com/llvm/llvm-project/pull/71913