[X86] AMD Zen 3: throughput for renameable GPR moves is 6

They are resolved at the register rename stage without
using any execution units.

diff --git a/llvm/lib/Target/X86/X86ScheduleZnver3.td b/llvm/lib/Target/X86/X86ScheduleZnver3.td
index 7fa4ff0..cdeeefa 100644 (file)
--- a/llvm/lib/Target/X86/X86ScheduleZnver3.td
+++ b/llvm/lib/Target/X86/X86ScheduleZnver3.td
@@ -1442,9 +1442,9 @@ defm : Zn3WriteResInt<WriteNop, [Zn3ALU0123], 0, [1], 1>; // FIXME: latency not
 // Zero Cycle Move
 ///////////////////////////////////////////////////////////////////////////////
 
-def Zn3WriteMoveRenameable : SchedWriteRes<[Zn3ALU0123]> {
+def Zn3WriteMoveRenameable : SchedWriteRes<[]> {
   let Latency = 0;
-  let ResourceCycles = [1];
+  let ResourceCycles = [];
   let NumMicroOps = 1;
 }
 def : InstRW<[Zn3WriteMoveRenameable], (instrs MOV32rr, MOV32rr_REV,

diff --git a/llvm/test/tools/llvm-mca/X86/Znver3/reg-move-elimination-gpr.s b/llvm/test/tools/llvm-mca/X86/Znver3/reg-move-elimination-gpr.s
index 3ff035c..249a196 100644 (file)
--- a/llvm/test/tools/llvm-mca/X86/Znver3/reg-move-elimination-gpr.s
+++ b/llvm/test/tools/llvm-mca/X86/Znver3/reg-move-elimination-gpr.s
@@ -81,7 +81,7 @@ xchgq %r15, %rax
 # CHECK:      Dispatch Width:    6
 # CHECK-NEXT: uOps Per Cycle:    6.00
 # CHECK-NEXT: IPC:               6.00
-# CHECK-NEXT: Block RThroughput: 3.5
+# CHECK-NEXT: Block RThroughput: 2.3
 
 # CHECK:      Instruction Info:
 # CHECK-NEXT: [1]: #uOps
@@ -92,20 +92,20 @@ xchgq %r15, %rax
 # CHECK-NEXT: [6]: HasSideEffects (U)
 
 # CHECK:      [1]    [2]    [3]    [4]    [5]    [6]    Instructions:
-# CHECK-NEXT:  1      0     0.25                        movl   %eax, %ecx
-# CHECK-NEXT:  1      0     0.25                        movl   %ecx, %edx
-# CHECK-NEXT:  1      0     0.25                        movl   %edx, %ebp
-# CHECK-NEXT:  1      0     0.25                        movl   %ebp, %esi
-# CHECK-NEXT:  1      0     0.25                        movl   %esi, %edi
-# CHECK-NEXT:  1      0     0.25                        movl   %edi, %r8d
-# CHECK-NEXT:  1      0     0.25                        movl   %r8d, %r9d
-# CHECK-NEXT:  1      0     0.25                        movl   %r9d, %r10d
-# CHECK-NEXT:  1      0     0.25                        movl   %r10d, %r11d
-# CHECK-NEXT:  1      0     0.25                        movl   %r11d, %r12d
-# CHECK-NEXT:  1      0     0.25                        movl   %r12d, %r13d
-# CHECK-NEXT:  1      0     0.25                        movl   %r13d, %r14d
-# CHECK-NEXT:  1      0     0.25                        movl   %r14d, %r15d
-# CHECK-NEXT:  1      0     0.25                        movl   %r15d, %eax
+# CHECK-NEXT:  1      0     0.17                        movl   %eax, %ecx
+# CHECK-NEXT:  1      0     0.17                        movl   %ecx, %edx
+# CHECK-NEXT:  1      0     0.17                        movl   %edx, %ebp
+# CHECK-NEXT:  1      0     0.17                        movl   %ebp, %esi
+# CHECK-NEXT:  1      0     0.17                        movl   %esi, %edi
+# CHECK-NEXT:  1      0     0.17                        movl   %edi, %r8d
+# CHECK-NEXT:  1      0     0.17                        movl   %r8d, %r9d
+# CHECK-NEXT:  1      0     0.17                        movl   %r9d, %r10d
+# CHECK-NEXT:  1      0     0.17                        movl   %r10d, %r11d
+# CHECK-NEXT:  1      0     0.17                        movl   %r11d, %r12d
+# CHECK-NEXT:  1      0     0.17                        movl   %r12d, %r13d
+# CHECK-NEXT:  1      0     0.17                        movl   %r13d, %r14d
+# CHECK-NEXT:  1      0     0.17                        movl   %r14d, %r15d
+# CHECK-NEXT:  1      0     0.17                        movl   %r15d, %eax
 
 # CHECK:      Register File statistics:
 # CHECK-NEXT: Total number of mappings created:    0
@@ -349,7 +349,7 @@ xchgq %r15, %rax
 # CHECK:      Dispatch Width:    6
 # CHECK-NEXT: uOps Per Cycle:    6.00
 # CHECK-NEXT: IPC:               6.00
-# CHECK-NEXT: Block RThroughput: 3.5
+# CHECK-NEXT: Block RThroughput: 2.3
 
 # CHECK:      Instruction Info:
 # CHECK-NEXT: [1]: #uOps
@@ -360,20 +360,20 @@ xchgq %r15, %rax
 # CHECK-NEXT: [6]: HasSideEffects (U)
 
 # CHECK:      [1]    [2]    [3]    [4]    [5]    [6]    Instructions:
-# CHECK-NEXT:  1      0     0.25                        movq   %rax, %rcx
-# CHECK-NEXT:  1      0     0.25                        movq   %rcx, %rdx
-# CHECK-NEXT:  1      0     0.25                        movq   %rdx, %rbp
-# CHECK-NEXT:  1      0     0.25                        movq   %rbp, %rsi
-# CHECK-NEXT:  1      0     0.25                        movq   %rsi, %rdi
-# CHECK-NEXT:  1      0     0.25                        movq   %rdi, %r8
-# CHECK-NEXT:  1      0     0.25                        movq   %r8, %r9
-# CHECK-NEXT:  1      0     0.25                        movq   %r9, %r10
-# CHECK-NEXT:  1      0     0.25                        movq   %r10, %r11
-# CHECK-NEXT:  1      0     0.25                        movq   %r11, %r12
-# CHECK-NEXT:  1      0     0.25                        movq   %r12, %r13
-# CHECK-NEXT:  1      0     0.25                        movq   %r13, %r14
-# CHECK-NEXT:  1      0     0.25                        movq   %r14, %r15
-# CHECK-NEXT:  1      0     0.25                        movq   %r15, %rax
+# CHECK-NEXT:  1      0     0.17                        movq   %rax, %rcx
+# CHECK-NEXT:  1      0     0.17                        movq   %rcx, %rdx
+# CHECK-NEXT:  1      0     0.17                        movq   %rdx, %rbp
+# CHECK-NEXT:  1      0     0.17                        movq   %rbp, %rsi
+# CHECK-NEXT:  1      0     0.17                        movq   %rsi, %rdi
+# CHECK-NEXT:  1      0     0.17                        movq   %rdi, %r8
+# CHECK-NEXT:  1      0     0.17                        movq   %r8, %r9
+# CHECK-NEXT:  1      0     0.17                        movq   %r9, %r10
+# CHECK-NEXT:  1      0     0.17                        movq   %r10, %r11
+# CHECK-NEXT:  1      0     0.17                        movq   %r11, %r12
+# CHECK-NEXT:  1      0     0.17                        movq   %r12, %r13
+# CHECK-NEXT:  1      0     0.17                        movq   %r13, %r14
+# CHECK-NEXT:  1      0     0.17                        movq   %r14, %r15
+# CHECK-NEXT:  1      0     0.17                        movq   %r15, %rax
 
 # CHECK:      Register File statistics:
 # CHECK-NEXT: Total number of mappings created:    0