[AMDGPU] implemented pal metadata

Summary:
For the amdpal OS type:

We write an AMDGPU_PAL_METADATA record in the .note section in the ELF
(or as an assembler directive). It contains key=value pairs of 32 bit
ints. It is a merge of metadata from codegen of the shaders, and
metadata provided by the frontend as _amdgpu_pal_metadata IR metadata.
Where both sources have a key=value with the same key, the two values
are ORed together.

This .note record is part of the amdpal ABI and will be documented in
docs/AMDGPUUsage.rst in a future commit.

Eventually the amdpal OS type will stop generating the .AMDGPU.config
section once the frontend has safely moved over to using the .note
records above instead of .AMDGPU.config.

Reviewers: arsenm, nhaehnle, dstuttard

Subscribers: kzhuravl, wdng, yaxunl, llvm-commits, t-tye

Differential Revision: https://reviews.llvm.org/D37753

llvm-svn: 314829

7 files changed, 19 insertions, 22 deletions

diff --git a/llvm/test/CodeGen/AMDGPU/amdpal-cs.ll b/llvm/test/CodeGen/AMDGPU/amdpal-cs.ll
index d722a4c2f38..a217478a154 100644
--- a/llvm/test/CodeGen/AMDGPU/amdpal-cs.ll
+++ b/llvm/test/CodeGen/AMDGPU/amdpal-cs.ll
@@ -2,10 +2,9 @@
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=VI -enable-var-scope %s
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=GFX9 -enable-var-scope %s
 
-; amdpal compute shader: check for 47176 (COMPUTE_PGM_RSRC1) in .AMDGPU.config
-; GCN-LABEL: .AMDGPU.config
-; GCN: .long  47176
+; amdpal compute shader: check for 0x2e12 (COMPUTE_PGM_RSRC1) in pal metadata
 ; GCN-LABEL: {{^}}cs_amdpal:
+; GCN: .amdgpu_pal_metadata{{.*}}0x2e12,
 define amdgpu_cs half @cs_amdpal(half %arg0) {
   %add = fadd half %arg0, 1.0
   ret half %add
diff --git a/llvm/test/CodeGen/AMDGPU/amdpal-es.ll b/llvm/test/CodeGen/AMDGPU/amdpal-es.ll
index fa976850f9d..287e8e1d0a7 100644
--- a/llvm/test/CodeGen/AMDGPU/amdpal-es.ll
+++ b/llvm/test/CodeGen/AMDGPU/amdpal-es.ll
@@ -1,10 +1,9 @@
 ; RUN: llc -mtriple=amdgcn--amdpal -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=SI %s
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=VI %s
 
-; amdpal pixel shader: check for 45864 (SPI_SHADER_PGM_RSRC1_ES) in .AMDGPU.config
-; GCN-LABEL: .AMDGPU.config
-; GCN: .long  45864
+; amdpal evaluation shader: check for 0x2cca (SPI_SHADER_PGM_RSRC1_ES) in pal metadata
 ; GCN-LABEL: {{^}}es_amdpal:
+; GCN: .amdgpu_pal_metadata{{.*}}0x2cca,
 define amdgpu_es half @es_amdpal(half %arg0) {
   %add = fadd half %arg0, 1.0
   ret half %add
diff --git a/llvm/test/CodeGen/AMDGPU/amdpal-gs.ll b/llvm/test/CodeGen/AMDGPU/amdpal-gs.ll
index d34c0f22f5a..8a0eb26f645 100644
--- a/llvm/test/CodeGen/AMDGPU/amdpal-gs.ll
+++ b/llvm/test/CodeGen/AMDGPU/amdpal-gs.ll
@@ -2,10 +2,9 @@
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=VI %s
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=GFX9 -enable-var-scope %s
 
-; amdpal pixel shader: check for 45608 (SPI_SHADER_PGM_RSRC1_GS) in .AMDGPU.config
-; GCN-LABEL: .AMDGPU.config
-; GCN: .long  45608
+; amdpal geometry shader: check for 0x2c8a (SPI_SHADER_PGM_RSRC1_GS) in pal metadata
 ; GCN-LABEL: {{^}}gs_amdpal:
+; GCN: .amdgpu_pal_metadata{{.*}}0x2c8a,
 define amdgpu_gs half @gs_amdpal(half %arg0) {
   %add = fadd half %arg0, 1.0
   ret half %add
diff --git a/llvm/test/CodeGen/AMDGPU/amdpal-hs.ll b/llvm/test/CodeGen/AMDGPU/amdpal-hs.ll
index eeaacf302c0..7827776c04b 100644
--- a/llvm/test/CodeGen/AMDGPU/amdpal-hs.ll
+++ b/llvm/test/CodeGen/AMDGPU/amdpal-hs.ll
@@ -2,10 +2,9 @@
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=VI %s
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=GFX9 -enable-var-scope %s
 
-; amdpal pixel shader: check for 46120 (SPI_SHADER_PGM_RSRC1_HS) in .AMDGPU.config
-; GCN-LABEL: .AMDGPU.config
-; GCN: .long  46120
+; amdpal hull shader: check for 0x2d0a (SPI_SHADER_PGM_RSRC1_HS) in pal metadata
 ; GCN-LABEL: {{^}}hs_amdpal:
+; GCN: .amdgpu_pal_metadata{{.*}}0x2d0a,
 define amdgpu_hs half @hs_amdpal(half %arg0) {
   %add = fadd half %arg0, 1.0
   ret half %add
diff --git a/llvm/test/CodeGen/AMDGPU/amdpal-ls.ll b/llvm/test/CodeGen/AMDGPU/amdpal-ls.ll
index e4624d04a96..c59a19b2d1e 100644
--- a/llvm/test/CodeGen/AMDGPU/amdpal-ls.ll
+++ b/llvm/test/CodeGen/AMDGPU/amdpal-ls.ll
@@ -1,10 +1,9 @@
 ; RUN: llc -mtriple=amdgcn--amdpal -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=SI %s
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=VI %s
 
-; amdpal pixel shader: check for 46376 (SPI_SHADER_PGM_RSRC1_LS) in .AMDGPU.config
-; GCN-LABEL: .AMDGPU.config
-; GCN: .long  46376
+; amdpal load shader: check for 0x2d4a (SPI_SHADER_PGM_RSRC1_LS) in pal metadata
 ; GCN-LABEL: {{^}}ls_amdpal:
+; GCN: .amdgpu_pal_metadata{{.*}}0x2d4a,
 define amdgpu_ls half @ls_amdpal(half %arg0) {
   %add = fadd half %arg0, 1.0
   ret half %add
diff --git a/llvm/test/CodeGen/AMDGPU/amdpal-ps.ll b/llvm/test/CodeGen/AMDGPU/amdpal-ps.ll
index 89a3d63774a..81adfb0b8d6 100644
--- a/llvm/test/CodeGen/AMDGPU/amdpal-ps.ll
+++ b/llvm/test/CodeGen/AMDGPU/amdpal-ps.ll
@@ -2,13 +2,16 @@
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=VI %s
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=GFX9 -enable-var-scope %s
 
-; amdpal pixel shader: check for 45096 (SPI_SHADER_PGM_RSRC1_PS) in .AMDGPU.config
-; GCN-LABEL: .AMDGPU.config
-; GCN: .long  45096
+; amdpal pixel shader: check for 0x2c0a (SPI_SHADER_PGM_RSRC1_PS) in pal
+; metadata. Check for 0x2c0b (SPI_SHADER_PGM_RSRC2_PS) in pal metadata, and
+; it has a value starting 0x42 as it is set to 0x42000000 in the metadata
+; below. Also check that key 0x10000000 value 0x12345678 is propagated.
 ; GCN-LABEL: {{^}}ps_amdpal:
+; GCN: .amdgpu_pal_metadata{{.*0x2c0a,[^,]*,0x2c0b,0x42.*,0x10000000,0x12345678}}
 define amdgpu_ps half @ps_amdpal(half %arg0) {
   %add = fadd half %arg0, 1.0
   ret half %add
 }
 
-
+!amdgpu.pal.metadata = !{!0}
+!0 = !{i32 11275, i32 1107296256, i32 268435456, i32 305419896}
diff --git a/llvm/test/CodeGen/AMDGPU/amdpal-vs.ll b/llvm/test/CodeGen/AMDGPU/amdpal-vs.ll
index 942b4581772..d336e703828 100644
--- a/llvm/test/CodeGen/AMDGPU/amdpal-vs.ll
+++ b/llvm/test/CodeGen/AMDGPU/amdpal-vs.ll
@@ -2,10 +2,9 @@
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=VI %s
 ; RUN: llc -mtriple=amdgcn--amdpal -mcpu=gfx900 -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=GFX9 -enable-var-scope %s
 
-; amdpal pixel shader: check for 45352 (SPI_SHADER_PGM_RSRC1_VS) in .AMDGPU.config
-; GCN-LABEL: .AMDGPU.config
-; GCN: .long  45352
+; amdpal vertex shader: check for 45352 (SPI_SHADER_PGM_RSRC1_VS) in pal metadata
 ; GCN-LABEL: {{^}}vs_amdpal:
+; GCN: .amdgpu_pal_metadata{{.*}}0x2c4a,
 define amdgpu_vs half @vs_amdpal(half %arg0) {
   %add = fadd half %arg0, 1.0
   ret half %add