[gcc/devel/omp/gcc-12] amdgcn: remove obsolete assembler workarounds

[gcc/devel/omp/gcc-12] amdgcn: remove obsolete assembler workarounds

[Tobias Burnus]

https://gcc.gnu.org/g:5aeba44d1974fde2f28718715bb3287b7792c03f

commit 5aeba44d1974fde2f28718715bb3287b7792c03f
Author: Andrew Stubbs <ams@codesourcery.com>
Date:   Tue Jul 5 11:28:54 2022 +0200

    amdgcn: remove obsolete assembler workarounds
    
    This nonsense is no longer required, now that the minimum supported
    assembler version is LLVM 13.0.1.
    
    gcc/ChangeLog:
    
            * config/gcn/gcn.md (*movbi): Remove assembler bug workarounds.
            (jump): Likewise.
            (movdi_symbol_save_scc): Likewise.
    
    (cherry picked from commit b06a282921c71bbc5cab69bc515804bd80f55e92)

Diff:
---
 gcc/ChangeLog.omp     |  9 +++++++++
 gcc/config/gcn/gcn.md | 36 +++++++-----------------------------
 2 files changed, 16 insertions(+), 29 deletions(-)

diff --git a/gcc/ChangeLog.omp b/gcc/ChangeLog.omp
index 5fe141fb79a..9d966df94ca 100644
--- a/gcc/ChangeLog.omp
+++ b/gcc/ChangeLog.omp
@@ -1,3 +1,12 @@
+2022-07-05  Tobias Burnus  <tobias@codesourcery.com>
+
+	Backport from mainline:
+	2022-06-27  Andrew Stubbs  <ams@codesourcery.com>
+
+	* config/gcn/gcn.md (*movbi): Remove assembler bug workarounds.
+	(jump): Likewise.
+	(movdi_symbol_save_scc): Likewise.
+
 2022-07-05  Tobias Burnus  <tobias@codesourcery.com>
 
 	Backport from mainline:
diff --git a/gcc/config/gcn/gcn.md b/gcc/config/gcn/gcn.md
index 47417ab371e..0f9381c9194 100644
--- a/gcc/config/gcn/gcn.md
+++ b/gcc/config/gcn/gcn.md
@@ -488,14 +488,7 @@
        we emit bytes directly as a workaround.  */
     switch (which_alternative) {
     case 0:
-      if (REG_P (operands[1]) && REGNO (operands[1]) == SCC_REG)
-	return "; s_mov_b32\t%0,%1 is not supported by the assembler.\;"
-	       ".byte\t0xfd\;"
-	       ".byte\t0x0\;"
-	       ".byte\t0x80|%R0\;"
-	       ".byte\t0xbe";
-      else
-	return "s_mov_b32\t%0, %1";
+      return "s_mov_b32\t%0, %1";
     case 1:
       if (REG_P (operands[1]) && REGNO (operands[1]) == SCC_REG)
 	return "; v_mov_b32\t%0, %1\;"
@@ -512,16 +505,8 @@
     case 4:
       return "v_cmp_ne_u32\tvcc, 0, %1";
     case 5:
-      if (REGNO (operands[1]) == SCC_REG)
-	return "; s_mov_b32\t%0, %1 is not supported by the assembler.\;"
-	       ".byte\t0xfd\;"
-	       ".byte\t0x0\;"
-	       ".byte\t0xea\;"
-	       ".byte\t0xbe\;"
-	       "s_mov_b32\tvcc_hi, 0";
-      else
-	return "s_mov_b32\tvcc_lo, %1\;"
-	       "s_mov_b32\tvcc_hi, 0";
+      return "s_mov_b32\tvcc_lo, %1\;"
+	     "s_mov_b32\tvcc_hi, 0";
     case 6:
     case 7:
       return "s_load_dword\t%0, %A1\;s_waitcnt\tlgkmcnt(0)";
@@ -768,8 +753,7 @@
       return "s_branch\t%0";
     else
       /* !!! This sequence clobbers EXEC_SAVE_REG and CC_SAVE_REG.  */
-      return "; s_mov_b32\ts22, scc is not supported by the assembler.\;"
-	     ".long\t0xbe9600fd\;"
+      return "s_mov_b32\ts22, scc\;"
 	     "s_getpc_b64\ts[20:21]\;"
 	     "s_add_u32\ts20, s20, %0@rel32@lo+4\;"
 	     "s_addc_u32\ts21, s21, %0@rel32@hi+4\;"
@@ -830,11 +814,7 @@
 	  }
 	else
 	  return "s_cbranch%c1\t.Lskip%=\;"
-		 "; s_mov_b32\ts22, scc is not supported by the assembler.\;"
-		 ".byte\t0xfd\;"
-		 ".byte\t0x0\;"
-		 ".byte\t0x80|22\;"
-		 ".byte\t0xbe\;"
+		 "s_mov_b32\ts22, scc\;"
 		 "s_getpc_b64\ts[20:21]\;"
 		 "s_add_u32\ts20, s20, %0@rel32@lo+4\;"
 		 "s_addc_u32\ts21, s21, %0@rel32@hi+4\;"
@@ -923,8 +903,7 @@
        DGPUs are most likely fine.  */
     if (SYMBOL_REF_P (operands[1])
 	&& SYMBOL_REF_WEAK (operands[1]))
-	return "; s_mov_b32\ts22, scc is not supported by the assembler.\;"
-	       ".long\t0xbe9600fd\;"
+	return "s_mov_b32\ts22, scc\;"
 	       "s_getpc_b64\t%0\;"
 	       "s_add_u32\t%L0, %L0, %1@gotpcrel32@lo+4\;"
 	       "s_addc_u32\t%H0, %H0, %1@gotpcrel32@hi+4\;"
@@ -932,8 +911,7 @@
 	       "s_cmpk_lg_u32\ts22, 0\;"
 	       "s_waitcnt\tlgkmcnt(0)";
 
-    return "; s_mov_b32\ts22, scc is not supported by the assembler.\;"
-	   ".long\t0xbe9600fd\;"
+    return "s_mov_b32\ts22, scc\;"
 	   "s_getpc_b64\t%0\;"
 	   "s_add_u32\t%L0, %L0, %1@rel32@lo+4\;"
 	   "s_addc_u32\t%H0, %H0, %1@rel32@hi+4\;"