[llvm-branch-commits] [llvm] Reland "RegisterCoalescer: Add implicit-def of super register when coalescing SUBREG_TO_REG" (PR #134408)

[Sander de Smalen via llvm-branch-commits]

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@@ -329,11 +329,10 @@ define <2 x half> @chain_hi_to_lo_global() {
 ; GFX11-TRUE16:       ; %bb.0: ; %bb
 ; GFX11-TRUE16-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX11-TRUE16-NEXT:    v_mov_b32_e32 v0, 2
-; GFX11-TRUE16-NEXT:    v_mov_b32_e32 v1, 0
+; GFX11-TRUE16-NEXT:    v_dual_mov_b32 v1, 0 :: v_dual_mov_b32 v2, 0
+; GFX11-TRUE16-NEXT:    v_mov_b32_e32 v3, 0
 ; GFX11-TRUE16-NEXT:    global_load_d16_b16 v0, v[0:1], off
-; GFX11-TRUE16-NEXT:    v_mov_b32_e32 v1, 0
-; GFX11-TRUE16-NEXT:    v_mov_b32_e32 v2, 0
-; GFX11-TRUE16-NEXT:    global_load_d16_hi_b16 v0, v[1:2], off
+; GFX11-TRUE16-NEXT:    global_load_d16_hi_b16 v0, v[2:3], off
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sdesmalen-arm wrote:

@broxigarchen I noticed these tests changed, but I couldn't really tell whether these changes are functionally equivalent.

https://github.com/llvm/llvm-project/pull/134408