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[ARM][LowOverheadLoops] Enable by default

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The code is now in a good enough state to pass the bunch of tests that
I have run (after fixing the bugs), so let's enable it by default.

Differential Revision: https://reviews.llvm.org/D65277


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@367297 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sam Parker
2019-07-30 08:14:28 +00:00
parent c3eb69f890
commit fa9636b934
8 changed files with 22 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/Target/ARM/ARMTargetTransformInfo.cpp
+1 -1
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@@ -37,7 +37,7 @@ using namespace llvm;
#define DEBUG_TYPE "armtti"
static cl::opt<bool> DisableLowOverheadLoops(
"disable-arm-loloops", cl::Hidden, cl::init(true),
"disable-arm-loloops", cl::Hidden, cl::init(false),
cl::desc("Disable the generation of low-overhead loops"));
bool ARMTTIImpl::areInlineCompatible(const Function *Caller,
test/Transforms/HardwareLoops/ARM/calls-codegen.ll
+4 -1
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@@ -1,4 +1,7 @@
; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+lob,+mve.fp -disable-arm-loloops=false %s -o - | FileCheck %s
; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+lob,+mve.fp -disable-arm-loloops=true %s -o - | FileCheck %s --check-prefix=DISABLED
; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+lob,+mve.fp %s -o - | FileCheck %s
; DISABLED-NOT: dls lr,
; CHECK-LABEL: test_target_specific:
; CHECK: mov.w lr, #50
test/Transforms/HardwareLoops/ARM/calls.ll
+8 -5
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@@ -1,8 +1,11 @@
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops -disable-arm-loloops=false %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-MAIN
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+fullfp16 -hardware-loops -disable-arm-loloops=false %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-FP
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+fp-armv8,+fullfp16 -hardware-loops -disable-arm-loloops=false %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-FP64
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+mve -hardware-loops -disable-arm-loloops=false %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-MVE
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+mve.fp -hardware-loops -disable-arm-loloops=false %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-MVEFP
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-MAIN
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+fullfp16 -hardware-loops %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-FP
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+fp-armv8,+fullfp16 -hardware-loops %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-FP64
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+mve -hardware-loops %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-MVE
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+mve.fp -hardware-loops %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-MVEFP
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops -disable-arm-loloops=true %s -S -o - | FileCheck %s --check-prefix=DISABLED
; DISABLED-NOT: call i32 @llvm.loop.decrement
; CHECK-LABEL: skip_call
; CHECK-NOT: call void @llvm.set.loop.iterations
test/Transforms/HardwareLoops/ARM/counter.ll
+1 -1
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@@ -1,4 +1,4 @@
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops -disable-arm-loloops=false %s -o - | FileCheck %s
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops %s -o - | FileCheck %s
@g = common local_unnamed_addr global i32* null, align 4
test/Transforms/HardwareLoops/ARM/do-rem.ll
+1 -1
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@@ -1,4 +1,4 @@
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops -disable-arm-loloops=false %s -S -o - | FileCheck %s
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops %s -S -o - | FileCheck %s
@g = common local_unnamed_addr global i32* null, align 4
test/Transforms/HardwareLoops/ARM/fp-emulation.ll
+2 -2
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@@ -1,5 +1,5 @@
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+fp-armv8 -hardware-loops -disable-arm-loloops=false %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-FP
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+soft-float -hardware-loops -disable-arm-loloops=false %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-SOFT
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+fp-armv8 -hardware-loops %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-FP
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=+soft-float -hardware-loops %s -S -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-SOFT
; CHECK-LABEL: test_fptosi
; CHECK-SOFT-NOT: call void @llvm.set.loop.iterations
test/Transforms/HardwareLoops/ARM/simple-do.ll
+2 -3
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@@ -1,7 +1,6 @@
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops -disable-arm-loloops=false %s -S -o - | FileCheck %s
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops %s -S -o - | FileCheck %s
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops -disable-arm-loloops=true %s -S -o - | FileCheck %s --check-prefix=DISABLED
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -mattr=-lob -hardware-loops %s -S -o - | FileCheck %s --check-prefix=DISABLED
; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi -disable-arm-loloops=false %s -o - | FileCheck %s --check-prefix=CHECK-LLC
; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi %s -o - | FileCheck %s --check-prefix=CHECK-LLC
; DISABLED-NOT: llvm.{{.*}}.loop.iterations
; DISABLED-NOT: llvm.loop.decrement
test/Transforms/HardwareLoops/ARM/structure.ll
+3 -3
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@@ -1,6 +1,6 @@
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops -disable-arm-loloops=false %s -S -o - | FileCheck %s
; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi -disable-arm-loloops=false %s -o - | FileCheck %s --check-prefix=CHECK-LLC
; RUN: opt -mtriple=thumbv8.1m.main -loop-unroll -unroll-remainder=false -S < %s | llc -mtriple=thumbv8.1m.main -disable-arm-loloops=false | FileCheck %s --check-prefix=CHECK-UNROLL
; RUN: opt -mtriple=thumbv8.1m.main-arm-none-eabi -hardware-loops %s -S -o - | FileCheck %s
; RUN: llc -mtriple=thumbv8.1m.main-arm-none-eabi %s -o - | FileCheck %s --check-prefix=CHECK-LLC
; RUN: opt -mtriple=thumbv8.1m.main -loop-unroll -unroll-remainder=false -S < %s | llc -mtriple=thumbv8.1m.main | FileCheck %s --check-prefix=CHECK-UNROLL
; CHECK-LABEL: early_exit
; CHECK-NOT: llvm.set.loop.iterations