diff options
Diffstat (limited to 'llvm/lib/Target/ARM')
| -rw-r--r-- | llvm/lib/Target/ARM/ARM.td | 9 | ||||
| -rw-r--r-- | llvm/lib/Target/ARM/ARMSubtarget.cpp | 3 | ||||
| -rw-r--r-- | llvm/lib/Target/ARM/ARMSubtarget.h | 4 |
3 files changed, 15 insertions, 1 deletions
diff --git a/llvm/lib/Target/ARM/ARM.td b/llvm/lib/Target/ARM/ARM.td index 2e62a079041..8f69c14d792 100644 --- a/llvm/lib/Target/ARM/ARM.td +++ b/llvm/lib/Target/ARM/ARM.td @@ -194,6 +194,10 @@ def FeatureSlowLoadDSubreg : SubtargetFeature<"slow-load-D-subreg", "SlowLoadDSubregister", "true", "Loading into D subregs is slow">; +def FeatureUseWideStrideVFP : SubtargetFeature<"wide-stride-vfp", + "UseWideStrideVFP", "true", + "Use a wide stride when allocating VFP registers">; + // Some targets (e.g. Cortex-A15) never want VMOVS to be widened to VMOVD. def FeatureDontWidenVMOVS : SubtargetFeature<"dont-widen-vmovs", "DontWidenVMOVS", "true", @@ -865,6 +869,7 @@ def : ProcessorModel<"swift", SwiftModel, [ARMv7a, ProcSwift, FeatureHasRetAddrStack, FeatureNEONForFP, FeatureVFP4, + FeatureUseWideStrideVFP, FeatureMP, FeatureHWDivThumb, FeatureHWDivARM, @@ -1018,24 +1023,28 @@ def : ProcessorModel<"cyclone", SwiftModel, [ARMv8a, ProcSwift, FeatureNoPostRASched]>; def : ProcNoItin<"exynos-m1", [ARMv8a, ProcExynosM1, + FeatureUseWideStrideVFP, FeatureHWDivThumb, FeatureHWDivARM, FeatureCrypto, FeatureCRC]>; def : ProcNoItin<"exynos-m2", [ARMv8a, ProcExynosM1, + FeatureUseWideStrideVFP, FeatureHWDivThumb, FeatureHWDivARM, FeatureCrypto, FeatureCRC]>; def : ProcNoItin<"exynos-m3", [ARMv8a, ProcExynosM1, + FeatureUseWideStrideVFP, FeatureHWDivThumb, FeatureHWDivARM, FeatureCrypto, FeatureCRC]>; def : ProcNoItin<"exynos-m4", [ARMv8a, ProcExynosM1, + FeatureUseWideStrideVFP, FeatureHWDivThumb, FeatureHWDivARM, FeatureCrypto, diff --git a/llvm/lib/Target/ARM/ARMSubtarget.cpp b/llvm/lib/Target/ARM/ARMSubtarget.cpp index f42cbbda1b7..07dfce975c1 100644 --- a/llvm/lib/Target/ARM/ARMSubtarget.cpp +++ b/llvm/lib/Target/ARM/ARMSubtarget.cpp @@ -370,7 +370,8 @@ bool ARMSubtarget::useStride4VFPs(const MachineFunction &MF) const { // For general targets, the prologue can grow when VFPs are allocated with // stride 4 (more vpush instructions). But WatchOS uses a compact unwind // format which it's more important to get right. - return isTargetWatchABI() || (isSwift() && !MF.getFunction().optForMinSize()); + return isTargetWatchABI() || + (useWideStrideVFP() && !MF.getFunction().optForMinSize()); } bool ARMSubtarget::useMovt(const MachineFunction &MF) const { diff --git a/llvm/lib/Target/ARM/ARMSubtarget.h b/llvm/lib/Target/ARM/ARMSubtarget.h index 74aee9a8ed3..69bc3eaedfb 100644 --- a/llvm/lib/Target/ARM/ARMSubtarget.h +++ b/llvm/lib/Target/ARM/ARMSubtarget.h @@ -353,6 +353,9 @@ protected: /// If true, loading into a D subregister will be penalized. bool SlowLoadDSubregister = false; + /// If true, use a wider stride when allocating VFP registers. + bool UseWideStrideVFP = false; + /// If true, the AGU and NEON/FPU units are multiplexed. bool HasMuxedUnits = false; @@ -596,6 +599,7 @@ public: bool hasVMLxHazards() const { return HasVMLxHazards; } bool hasSlowOddRegister() const { return SlowOddRegister; } bool hasSlowLoadDSubregister() const { return SlowLoadDSubregister; } + bool useWideStrideVFP() const { return UseWideStrideVFP; } bool hasMuxedUnits() const { return HasMuxedUnits; } bool dontWidenVMOVS() const { return DontWidenVMOVS; } bool useSplatVFPToNeon() const { return SplatVFPToNeon; } |
