[NFC][AMDGPU] Rename test (#126725)

The demonte-scc transformation is no longer needed and the old test name
doesn't make sense anymore.

The test checks the generated assembly for different branch cases
* without metadata,
* with the same branch_weights on each edge and
* with a branch_weights that corresponds to the [[likely]] attribute

Author: jmmartinez

llvm/test/CodeGen/AMDGPU/amdgpu-demote-scc-branches.ll renamed to llvm/test/CodeGen/AMDGPU/amdgpu-branch-weight-metadata.ll

@@ -50,8 +50,8 @@ if.end:
   ret void
 }
 
-define void @uniform_br_unprofitable(i32 noundef inreg %value, ptr addrspace(8) nocapture writeonly inreg %res, i32 noundef inreg %v_offset, i32 noundef inreg %0, i32 noundef inreg %flag) {
-; GFX9-LABEL: uniform_br_unprofitable:
+define void @uniform_br_same_weight(i32 noundef inreg %value, ptr addrspace(8) nocapture writeonly inreg %res, i32 noundef inreg %v_offset, i32 noundef inreg %0, i32 noundef inreg %flag) {
+; GFX9-LABEL: uniform_br_same_weight:
 ; GFX9:       ; %bb.0: ; %entry
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    s_cmp_lt_i32 s23, 1
@@ -68,7 +68,7 @@ define void @uniform_br_unprofitable(i32 noundef inreg %value, ptr addrspace(8)
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    s_setpc_b64 s[30:31]
 ;
-; GFX10-LABEL: uniform_br_unprofitable:
+; GFX10-LABEL: uniform_br_same_weight:
 ; GFX10:       ; %bb.0: ; %entry
 ; GFX10-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX10-NEXT:    s_cmp_lt_i32 s23, 1
@@ -97,8 +97,8 @@ if.end:
   ret void
 }
 
-define void @uniform_br_profitable(i32 noundef inreg %value, ptr addrspace(8) nocapture writeonly inreg %res, i32 noundef inreg %v_offset, i32 noundef inreg %0, i32 noundef inreg %flag) {
-; GFX9-LABEL: uniform_br_profitable:
+define void @uniform_br_then_likely(i32 noundef inreg %value, ptr addrspace(8) nocapture writeonly inreg %res, i32 noundef inreg %v_offset, i32 noundef inreg %0, i32 noundef inreg %flag) {
+; GFX9-LABEL: uniform_br_then_likely:
 ; GFX9:       ; %bb.0: ; %entry
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    s_cmp_lt_i32 s23, 1
@@ -115,7 +115,7 @@ define void @uniform_br_profitable(i32 noundef inreg %value, ptr addrspace(8) no
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    s_setpc_b64 s[30:31]
 ;
-; GFX10-LABEL: uniform_br_profitable:
+; GFX10-LABEL: uniform_br_then_likely:
 ; GFX10:       ; %bb.0: ; %entry
 ; GFX10-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX10-NEXT:    s_cmp_lt_i32 s23, 1
@@ -215,8 +215,8 @@ if.end:
   ret void
 }
 
-define void @divergent_br_unprofitable(i32 noundef inreg %value, ptr addrspace(8) nocapture writeonly inreg %res, i32 noundef inreg %v_offset, i32 noundef inreg %0, i32 noundef %flag) {
-; GFX9-LABEL: divergent_br_unprofitable:
+define void @divergent_br_same_weight(i32 noundef inreg %value, ptr addrspace(8) nocapture writeonly inreg %res, i32 noundef inreg %v_offset, i32 noundef inreg %0, i32 noundef %flag) {
+; GFX9-LABEL: divergent_br_same_weight:
 ; GFX9:       ; %bb.0: ; %entry
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v0
@@ -235,7 +235,7 @@ define void @divergent_br_unprofitable(i32 noundef inreg %value, ptr addrspace(8
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    s_setpc_b64 s[30:31]
 ;
-; GFX1010-LABEL: divergent_br_unprofitable:
+; GFX1010-LABEL: divergent_br_same_weight:
 ; GFX1010:       ; %bb.0: ; %entry
 ; GFX1010-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX1010-NEXT:    v_cmp_lt_i32_e32 vcc_lo, 0, v0
@@ -255,7 +255,7 @@ define void @divergent_br_unprofitable(i32 noundef inreg %value, ptr addrspace(8
 ; GFX1010-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX1010-NEXT:    s_setpc_b64 s[30:31]
 ;
-; GFX1030-LABEL: divergent_br_unprofitable:
+; GFX1030-LABEL: divergent_br_same_weight:
 ; GFX1030:       ; %bb.0: ; %entry
 ; GFX1030-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX1030-NEXT:    s_mov_b32 s8, exec_lo
@@ -286,8 +286,8 @@ if.end:
   ret void
 }
 
-define void @divergent_br_profitable(i32 noundef inreg %value, ptr addrspace(8) nocapture writeonly inreg %res, i32 noundef inreg %v_offset, i32 noundef inreg %0, i32 noundef %flag) {
-; GFX9-LABEL: divergent_br_profitable:
+define void @divergent_br_then_likely(i32 noundef inreg %value, ptr addrspace(8) nocapture writeonly inreg %res, i32 noundef inreg %v_offset, i32 noundef inreg %0, i32 noundef %flag) {
+; GFX9-LABEL: divergent_br_then_likely:
 ; GFX9:       ; %bb.0: ; %entry
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    v_cmp_lt_i32_e32 vcc, 0, v0
@@ -305,7 +305,7 @@ define void @divergent_br_profitable(i32 noundef inreg %value, ptr addrspace(8)
 ; GFX9-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX9-NEXT:    s_setpc_b64 s[30:31]
 ;
-; GFX1010-LABEL: divergent_br_profitable:
+; GFX1010-LABEL: divergent_br_then_likely:
 ; GFX1010:       ; %bb.0: ; %entry
 ; GFX1010-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX1010-NEXT:    v_cmp_lt_i32_e32 vcc_lo, 0, v0
@@ -324,7 +324,7 @@ define void @divergent_br_profitable(i32 noundef inreg %value, ptr addrspace(8)
 ; GFX1010-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX1010-NEXT:    s_setpc_b64 s[30:31]
 ;
-; GFX1030-LABEL: divergent_br_profitable:
+; GFX1030-LABEL: divergent_br_then_likely:
 ; GFX1030:       ; %bb.0: ; %entry
 ; GFX1030-NEXT:    s_waitcnt vmcnt(0) expcnt(0) lgkmcnt(0)
 ; GFX1030-NEXT:    s_mov_b32 s8, exec_lo