[llvm] [AMDGPU] Change physical VGPRs to 1024 for gfx13 (PR #222615)
Mariusz Sikora via llvm-commits
llvm-commits at lists.llvm.org
Thu Sep 10 04:30:45 PDT 2026
https://github.com/mariusz-sikora-at-amd created https://github.com/llvm/llvm-project/pull/222615
GFX13 has 1024 physical VGPRs per SIMD in wave32 (512 in wave64)
>From 4394def5075851cb0926fac832914154c8f086af Mon Sep 17 00:00:00 2001
From: Mariusz Sikora <mariusz.sikora at amd.com>
Date: Wed, 9 Sep 2026 09:01:52 -0400
Subject: [PATCH] [AMDGPU] Change physical VGPRs to 1024 for gfx13
GFX13 has 1024 physical VGPRs per SIMD in wave32 (512 in wave64)
---
llvm/lib/Target/AMDGPU/AMDGPU.td | 1 -
llvm/test/CodeGen/AMDGPU/occupancy-levels.ll | 64 +++++++++++---------
2 files changed, 34 insertions(+), 31 deletions(-)
diff --git a/llvm/lib/Target/AMDGPU/AMDGPU.td b/llvm/lib/Target/AMDGPU/AMDGPU.td
index 855f29e94ab5b..4751b8968f71f 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPU.td
+++ b/llvm/lib/Target/AMDGPU/AMDGPU.td
@@ -2596,7 +2596,6 @@ def FeatureISAVersion13 : FeatureSet<
FeatureBitOp3Insts,
FeatureTanhInsts,
FeatureTensorCvtLutInsts,
- Feature1536VGPRs,
FeatureBF16TransInsts,
FeatureBF16ConversionInsts,
FeatureBF16PackedInsts,
diff --git a/llvm/test/CodeGen/AMDGPU/occupancy-levels.ll b/llvm/test/CodeGen/AMDGPU/occupancy-levels.ll
index 1d63d62fc8524..b7ee93228e7aa 100644
--- a/llvm/test/CodeGen/AMDGPU/occupancy-levels.ll
+++ b/llvm/test/CodeGen/AMDGPU/occupancy-levels.ll
@@ -65,7 +65,7 @@ define amdgpu_kernel void @max_occupancy() #10 {
; GFX1200W32: ; Occupancy: 5
; GFX1200W64: ; Occupancy: 3
; GFX1250: ; Occupancy: 3
-; GFX1310W32: ; Occupancy: 5
+; GFX1310W32: ; Occupancy: 4
; GFX1310W64: ; Occupancy: 3
define amdgpu_kernel void @limited_occupancy_3() #0 {
ret void
@@ -169,7 +169,8 @@ define amdgpu_kernel void @used_32_vgprs() #10 {
; GFX1100: ; Occupancy: 16
; GFX1200: ; Occupancy: 16
; GFX1250: ; Occupancy: 16
-; GFX1310: ; Occupancy: 16
+; GFX1310W32: ; Occupancy: 16
+; GFX1310W64: ; Occupancy: 12
define amdgpu_kernel void @used_36_vgprs() #10 {
call void asm sideeffect "", "~{v35}" ()
ret void
@@ -187,7 +188,8 @@ define amdgpu_kernel void @used_36_vgprs() #10 {
; GFX1100: ; Occupancy: 16
; GFX1200: ; Occupancy: 16
; GFX1250: ; Occupancy: 16
-; GFX1310: ; Occupancy: 16
+; GFX1310W32: ; Occupancy: 16
+; GFX1310W64: ; Occupancy: 12
define amdgpu_kernel void @used_40_vgprs() #10 {
call void asm sideeffect "", "~{v39}" ()
ret void
@@ -206,7 +208,8 @@ define amdgpu_kernel void @used_40_vgprs() #10 {
; GFX1100: ; Occupancy: 16
; GFX1200: ; Occupancy: 16
; GFX1250: ; Occupancy: 16
-; GFX1310: ; Occupancy: 16
+; GFX1310W32: ; Occupancy: 16
+; GFX1310W64: ; Occupancy: 10
define amdgpu_kernel void @used_44_vgprs() #10 {
call void asm sideeffect "", "~{v43}" ()
ret void
@@ -224,7 +227,8 @@ define amdgpu_kernel void @used_44_vgprs() #10 {
; GFX1100: ; Occupancy: 16
; GFX1200: ; Occupancy: 16
; GFX1250: ; Occupancy: 16
-; GFX1310: ; Occupancy: 16
+; GFX1310W32: ; Occupancy: 16
+; GFX1310W64: ; Occupancy: 10
define amdgpu_kernel void @used_48_vgprs() #10 {
call void asm sideeffect "", "~{v47}" ()
ret void
@@ -245,7 +249,7 @@ define amdgpu_kernel void @used_48_vgprs() #10 {
; GFX1200W64: ; Occupancy: 12
; GFX1250: ; Occupancy: 16
; GFX1310W32: ; Occupancy: 16
-; GFX1310W64: ; Occupancy: 12
+; GFX1310W64: ; Occupancy: 9
define amdgpu_kernel void @used_56_vgprs() #10 {
call void asm sideeffect "", "~{v55}" ()
ret void
@@ -265,7 +269,7 @@ define amdgpu_kernel void @used_56_vgprs() #10 {
; GFX1200W64: ; Occupancy: 10
; GFX1250: ; Occupancy: 16
; GFX1310W32: ; Occupancy: 16
-; GFX1310W64: ; Occupancy: 10
+; GFX1310W64: ; Occupancy: 8
define amdgpu_kernel void @used_64_vgprs() #10 {
call void asm sideeffect "", "~{v63}" ()
ret void
@@ -285,8 +289,8 @@ define amdgpu_kernel void @used_64_vgprs() #10 {
; GFX1200W32: ; Occupancy: 16
; GFX1200W64: ; Occupancy: 10
; GFX1250: ; Occupancy: 12
-; GFX1310W32: ; Occupancy: 16
-; GFX1310W64: ; Occupancy: 10
+; GFX1310W32: ; Occupancy: 12
+; GFX1310W64: ; Occupancy: 7
define amdgpu_kernel void @used_72_vgprs() #10 {
call void asm sideeffect "", "~{v71}" ()
ret void
@@ -305,8 +309,8 @@ define amdgpu_kernel void @used_72_vgprs() #10 {
; GFX1200W32: ; Occupancy: 16
; GFX1200W64: ; Occupancy: 9
; GFX1250: ; Occupancy: 12
-; GFX1310W32: ; Occupancy: 16
-; GFX1310W64: ; Occupancy: 9
+; GFX1310W32: ; Occupancy: 12
+; GFX1310W64: ; Occupancy: 6
define amdgpu_kernel void @used_80_vgprs() #10 {
call void asm sideeffect "", "~{v79}" ()
ret void
@@ -327,8 +331,8 @@ define amdgpu_kernel void @used_80_vgprs() #10 {
; GFX1200W32: ; Occupancy: 16
; GFX1200W64: ; Occupancy: 9
; GFX1250: ; Occupancy: 10
-; GFX1310W32: ; Occupancy: 16
-; GFX1310W64: ; Occupancy: 9
+; GFX1310W32: ; Occupancy: 10
+; GFX1310W64: ; Occupancy: 5
define amdgpu_kernel void @used_84_vgprs() #10 {
call void asm sideeffect "", "~{v83}" ()
ret void
@@ -348,8 +352,8 @@ define amdgpu_kernel void @used_84_vgprs() #10 {
; GFX1200W32: ; Occupancy: 16
; GFX1200W64: ; Occupancy: 8
; GFX1250: ; Occupancy: 10
-; GFX1310W32: ; Occupancy: 16
-; GFX1310W64: ; Occupancy: 8
+; GFX1310W32: ; Occupancy: 10
+; GFX1310W64: ; Occupancy: 5
define amdgpu_kernel void @used_88_vgprs() #10 {
call void asm sideeffect "", "~{v87}" ()
ret void
@@ -368,8 +372,8 @@ define amdgpu_kernel void @used_88_vgprs() #10 {
; GFX1200W32: ; Occupancy: 16
; GFX1200W64: ; Occupancy: 8
; GFX1250: ; Occupancy: 10
-; GFX1310W32: ; Occupancy: 16
-; GFX1310W64: ; Occupancy: 8
+; GFX1310W32: ; Occupancy: 10
+; GFX1310W64: ; Occupancy: 5
define amdgpu_kernel void @used_96_vgprs() #10 {
call void asm sideeffect "", "~{v95}" ()
ret void
@@ -389,8 +393,8 @@ define amdgpu_kernel void @used_96_vgprs() #10 {
; GFX1200W32: ; Occupancy: 12
; GFX1200W64: ; Occupancy: 7
; GFX1250: ; Occupancy: 9
-; GFX1310W32: ; Occupancy: 12
-; GFX1310W64: ; Occupancy: 7
+; GFX1310W32: ; Occupancy: 9
+; GFX1310W64: ; Occupancy: 4
define amdgpu_kernel void @used_100_vgprs() #10 {
call void asm sideeffect "", "~{v99}" ()
ret void
@@ -409,8 +413,8 @@ define amdgpu_kernel void @used_100_vgprs() #10 {
; GFX1200W32: ; Occupancy: 12
; GFX1200W64: ; Occupancy: 6
; GFX1250: ; Occupancy: 9
-; GFX1310W32: ; Occupancy: 12
-; GFX1310W64: ; Occupancy: 6
+; GFX1310W32: ; Occupancy: 9
+; GFX1310W64: ; Occupancy: 4
define amdgpu_kernel void @used_112_vgprs() #10 {
call void asm sideeffect "", "~{v111}" ()
ret void
@@ -429,8 +433,8 @@ define amdgpu_kernel void @used_112_vgprs() #10 {
; GFX1200W32: ; Occupancy: 10
; GFX1200W64: ; Occupancy: 5
; GFX1250: ; Occupancy: 8
-; GFX1310W32: ; Occupancy: 10
-; GFX1310W64: ; Occupancy: 5
+; GFX1310W32: ; Occupancy: 8
+; GFX1310W64: ; Occupancy: 4
define amdgpu_kernel void @used_128_vgprs() #10 {
call void asm sideeffect "", "~{v127}" ()
ret void
@@ -449,8 +453,8 @@ define amdgpu_kernel void @used_128_vgprs() #10 {
; GFX1200W32: ; Occupancy: 10
; GFX1200W64: ; Occupancy: 5
; GFX1250: ; Occupancy: 7
-; GFX1310W32: ; Occupancy: 10
-; GFX1310W64: ; Occupancy: 5
+; GFX1310W32: ; Occupancy: 7
+; GFX1310W64: ; Occupancy: 3
define amdgpu_kernel void @used_144_vgprs() #10 {
call void asm sideeffect "", "~{v143}" ()
ret void
@@ -470,8 +474,8 @@ define amdgpu_kernel void @used_144_vgprs() #10 {
; GFX1200W32: ; Occupancy: 9
; GFX1200W64: ; Occupancy: 4
; GFX1250: ; Occupancy: 5
-; GFX1310W32: ; Occupancy: 9
-; GFX1310W64: ; Occupancy: 4
+; GFX1310W32: ; Occupancy: 5
+; GFX1310W64: ; Occupancy: 3
define amdgpu_kernel void @used_168_vgprs() #10 {
call void asm sideeffect "", "~{v167}" ()
ret void
@@ -491,8 +495,8 @@ define amdgpu_kernel void @used_168_vgprs() #10 {
; GFX1200W32: ; Occupancy: 7
; GFX1200W64: ; Occupancy: 3
; GFX1250: ; Occupancy: 4
-; GFX1310W32: ; Occupancy: 7
-; GFX1310W64: ; Occupancy: 3
+; GFX1310W32: ; Occupancy: 4
+; GFX1310W64: ; Occupancy: 2
define amdgpu_kernel void @used_200_vgprs() #10 {
call void asm sideeffect "", "~{v199}" ()
ret void
@@ -511,7 +515,7 @@ define amdgpu_kernel void @used_200_vgprs() #10 {
; GFX1200W32: ; Occupancy: 5
; GFX1200W64: ; Occupancy: 2
; GFX1250: ; Occupancy: 4
-; GFX1310W32: ; Occupancy: 5
+; GFX1310W32: ; Occupancy: 4
; GFX1310W64: ; Occupancy: 2
define amdgpu_kernel void @used_256_vgprs() #10 {
call void asm sideeffect "", "~{v255}" ()
More information about the llvm-commits
mailing list