if (countPopulation(RPC.first) > 1 && !RPC.second.isReserved()) {
// Remove the leading 1 from the resource group mask.
uint64_t Mask = RPC.first ^ PowerOf2Floor(RPC.first);
- if ((Mask & UsedResourceUnits) == Mask)
+ uint64_t MaxResourceUnits = countPopulation(Mask);
+ if (RPC.second.NumUnits > countPopulation(Mask)) {
RPC.second.setReserved();
+ RPC.second.NumUnits = MaxResourceUnits;
+ }
}
}
--- /dev/null
+# NOTE: Assertions have been autogenerated by utils/update_mca_test_checks.py
+# RUN: llvm-mca -mtriple=x86_64-unknown-unknown -mcpu=haswell -iterations=100 < %s | FileCheck %s
+
+fxrstor (%rsp)
+
+# CHECK: Iterations: 100
+# CHECK-NEXT: Instructions: 100
+# CHECK-NEXT: Total Cycles: 6403
+# CHECK-NEXT: Total uOps: 9000
+
+# CHECK: Dispatch Width: 4
+# CHECK-NEXT: uOps Per Cycle: 1.41
+# CHECK-NEXT: IPC: 0.02
+# CHECK-NEXT: Block RThroughput: 22.5
+
+# CHECK: Instruction Info:
+# CHECK-NEXT: [1]: #uOps
+# CHECK-NEXT: [2]: Latency
+# CHECK-NEXT: [3]: RThroughput
+# CHECK-NEXT: [4]: MayLoad
+# CHECK-NEXT: [5]: MayStore
+# CHECK-NEXT: [6]: HasSideEffects (U)
+
+# CHECK: [1] [2] [3] [4] [5] [6] Instructions:
+# CHECK-NEXT: 90 64 16.50 * * U fxrstor (%rsp)
+
+# CHECK: Resources:
+# CHECK-NEXT: [0] - HWDivider
+# CHECK-NEXT: [1] - HWFPDivider
+# CHECK-NEXT: [2] - HWPort0
+# CHECK-NEXT: [3] - HWPort1
+# CHECK-NEXT: [4] - HWPort2
+# CHECK-NEXT: [5] - HWPort3
+# CHECK-NEXT: [6] - HWPort4
+# CHECK-NEXT: [7] - HWPort5
+# CHECK-NEXT: [8] - HWPort6
+# CHECK-NEXT: [9] - HWPort7
+
+# CHECK: Resource pressure per iteration:
+# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6] [7] [8] [9]
+# CHECK-NEXT: - - 4.00 1.00 16.50 16.50 - 1.00 2.00 -
+
+# CHECK: Resource pressure by instruction:
+# CHECK-NEXT: [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] Instructions:
+# CHECK-NEXT: - - 4.00 1.00 16.50 16.50 - 1.00 2.00 - fxrstor (%rsp)