[llvm] r373358 - [llvm-mca] Add a -mattr flag
David Green via llvm-commits
llvm-commits at lists.llvm.org
Tue Oct 1 10:41:38 PDT 2019
Author: dmgreen
Date: Tue Oct 1 10:41:38 2019
New Revision: 373358
URL: http://llvm.org/viewvc/llvm-project?rev=373358&view=rev
Log:
[llvm-mca] Add a -mattr flag
This adds a -mattr flag to llvm-mca, for cases where the -mcpu option does not
contain all optional features.
Differential Revision: https://reviews.llvm.org/D68190
Added:
llvm/trunk/test/tools/llvm-mca/ARM/m4-targetfeatures.s
Modified:
llvm/trunk/tools/llvm-mca/llvm-mca.cpp
Added: llvm/trunk/test/tools/llvm-mca/ARM/m4-targetfeatures.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/tools/llvm-mca/ARM/m4-targetfeatures.s?rev=373358&view=auto
==============================================================================
--- llvm/trunk/test/tools/llvm-mca/ARM/m4-targetfeatures.s (added)
+++ llvm/trunk/test/tools/llvm-mca/ARM/m4-targetfeatures.s Tue Oct 1 10:41:38 2019
@@ -0,0 +1,29 @@
+# NOTE: Assertions have been autogenerated by utils/update_mca_test_checks.py
+# RUN: llvm-mca -mtriple=arm-none-none-eabi -mcpu=cortex-m4 -mattr=+fp64 -instruction-tables < %s | FileCheck %s
+
+vadd.f32 s0, s2, s2
+vadd.f64 d0, d2, d2
+
+# 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: 1 1 1.00 vadd.f32 s0, s2, s2
+# CHECK-NEXT: 1 1 1.00 vadd.f64 d0, d2, d2
+
+# CHECK: Resources:
+# CHECK-NEXT: [0] - M4Unit
+
+# CHECK: Resource pressure per iteration:
+# CHECK-NEXT: [0]
+# CHECK-NEXT: 2.00
+
+# CHECK: Resource pressure by instruction:
+# CHECK-NEXT: [0] Instructions:
+# CHECK-NEXT: 1.00 vadd.f32 s0, s2, s2
+# CHECK-NEXT: 1.00 vadd.f64 d0, d2, d2
Modified: llvm/trunk/tools/llvm-mca/llvm-mca.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/llvm-mca/llvm-mca.cpp?rev=373358&r1=373357&r2=373358&view=diff
==============================================================================
--- llvm/trunk/tools/llvm-mca/llvm-mca.cpp (original)
+++ llvm/trunk/tools/llvm-mca/llvm-mca.cpp Tue Oct 1 10:41:38 2019
@@ -89,6 +89,11 @@ static cl::opt<std::string>
cl::desc("Target a specific cpu type (-mcpu=help for details)"),
cl::value_desc("cpu-name"), cl::cat(ToolOptions), cl::init("native"));
+static cl::opt<std::string>
+ MATTR("mattr",
+ cl::desc("Additional target features."),
+ cl::cat(ToolOptions));
+
static cl::opt<int>
OutputAsmVariant("output-asm-variant",
cl::desc("Syntax variant to use for output printing"),
@@ -322,7 +327,7 @@ int main(int argc, char **argv) {
MCPU = llvm::sys::getHostCPUName();
std::unique_ptr<MCSubtargetInfo> STI(
- TheTarget->createMCSubtargetInfo(TripleName, MCPU, /* FeaturesStr */ ""));
+ TheTarget->createMCSubtargetInfo(TripleName, MCPU, MATTR));
if (!STI->isCPUStringValid(MCPU))
return 1;
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