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[RISCV] Enable merging of external globals by default #117880

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Merged
merged 3 commits into from
Dec 11, 2024
Merged

[RISCV] Enable merging of external globals by default #117880

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0496e16
[RISCV] Enable merging of external globals by default
asb Nov 27, 2024
2e3ee91
Delete ForceEnableGlobalMergeExternalGlobals as it's redundant with g…
asb Dec 4, 2024
c0fe781
Merge remote-tracking branch 'origin/main' into 2024q4-riscv-globals-…
asb Dec 11, 2024
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10 changes: 1 addition & 9 deletions llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -51,13 +51,6 @@ static cl::opt<cl::boolOrDefault>
EnableGlobalMerge("riscv-enable-global-merge", cl::Hidden,
cl::desc("Enable the global merge pass"));

static cl::opt<bool> ForceEnableGlobalMergeExternalGlobals(
"riscv-force-enable-global-merge-external-globals", cl::Hidden,
cl::init(false),
cl::desc(
"If the global merge pass is enabled, force enable global merging of "
"external globals (overriding any logic that might disable it)"));

static cl::opt<bool>
EnableMachineCombiner("riscv-enable-machine-combiner",
cl::desc("Enable the machine combiner pass"),
Expand Down Expand Up @@ -494,8 +487,7 @@ bool RISCVPassConfig::addPreISel() {
// Investigating and addressing both items are TODO.
addPass(createGlobalMergePass(TM, /* MaxOffset */ 2047,
/* OnlyOptimizeForSize */ false,
/* MergeExternalByDefault */
ForceEnableGlobalMergeExternalGlobals));
/* MergeExternalByDefault */ true));
}

return false;
Expand Down
7 changes: 3 additions & 4 deletions llvm/test/CodeGen/RISCV/global-merge-minsize-smalldata-nonzero.ll
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Original file line number Diff line number Diff line change
@@ -1,8 +1,7 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv64 -riscv-force-enable-global-merge-external-globals \
; RUN: -verify-machineinstrs < %s | FileCheck %s -check-prefix=SMALL-DATA
; RUN: llc -mtriple=riscv64 -global-merge-min-data-size=0 \
; RUN: -riscv-force-enable-global-merge-external-globals -verify-machineinstrs < %s \
; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
; RUN: | FileCheck %s -check-prefix=SMALL-DATA
; RUN: llc -mtriple=riscv64 -global-merge-min-data-size=0 -verify-machineinstrs < %s \
; RUN: | FileCheck %s -check-prefix=MINSIZE

@ig1 = internal global i32 0, align 4
Expand Down
7 changes: 3 additions & 4 deletions llvm/test/CodeGen/RISCV/global-merge-minsize-smalldata-zero.ll
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@@ -1,8 +1,7 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -riscv-force-enable-global-merge-external-globals \
; RUN: -verify-machineinstrs < %s | FileCheck %s -check-prefix=SMALL-DATA
; RUN: llc -mtriple=riscv64 -global-merge-min-data-size=5 \
; RUN: -riscv-force-enable-global-merge-external-globals -verify-machineinstrs < %s \
; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
; RUN: | FileCheck %s -check-prefix=SMALL-DATA
; RUN: llc -mtriple=riscv64 -global-merge-min-data-size=5 -verify-machineinstrs < %s \
; RUN: | FileCheck %s -check-prefix=MINSIZE

@ig1 = internal global i32 0, align 4
Expand Down
4 changes: 2 additions & 2 deletions llvm/test/CodeGen/RISCV/global-merge-minsize.ll
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Original file line number Diff line number Diff line change
@@ -1,8 +1,8 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -riscv-force-enable-global-merge-external-globals \
; RUN: llc -mtriple=riscv32 \
; RUN: -verify-machineinstrs < %s | FileCheck %s -check-prefix=RV32
; RUN: llc -mtriple=riscv32 -global-merge-min-data-size=5 \
; RUN: -riscv-force-enable-global-merge-external-globals -verify-machineinstrs < %s | FileCheck %s -check-prefix=RV32-MINSIZE
; RUN: -verify-machineinstrs < %s | FileCheck %s -check-prefix=RV32-MINSIZE

@ig1 = internal global i32 0, align 4
@ig2 = internal global i32 0, align 4
Expand Down
8 changes: 4 additions & 4 deletions llvm/test/CodeGen/RISCV/global-merge-offset.ll
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Original file line number Diff line number Diff line change
@@ -1,12 +1,12 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: sed 's/ArrSize/100/g' %s | llc -mtriple=riscv32 \
; RUN: -riscv-force-enable-global-merge-external-globals -verify-machineinstrs | FileCheck %s
; RUN: -verify-machineinstrs | FileCheck %s
; RUN: sed 's/ArrSize/100/g' %s | llc -mtriple=riscv64 \
; RUN: -riscv-force-enable-global-merge-external-globals -verify-machineinstrs | FileCheck %s
; RUN: -verify-machineinstrs | FileCheck %s
; RUN: sed 's/ArrSize/101/g' %s | llc -mtriple=riscv32 \
; RUN: -riscv-force-enable-global-merge-external-globals -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-TOOBIG
; RUN: -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-TOOBIG
; RUN: sed 's/ArrSize/101/g' %s | llc -mtriple=riscv64 \
; RUN: -riscv-force-enable-global-merge-external-globals -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-TOOBIG
; RUN: -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-TOOBIG

; This test demonstrates that the MaxOffset is set correctly for RISC-V by
; constructing an input that is at the limit and comparing.
Expand Down
12 changes: 6 additions & 6 deletions llvm/test/CodeGen/RISCV/global-merge.ll
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Original file line number Diff line number Diff line change
@@ -1,11 +1,11 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s | FileCheck %s
; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s | FileCheck %s
; RUN: llc -mtriple=riscv32 \
; RUN: -riscv-force-enable-global-merge-external-globals -verify-machineinstrs < %s \
; RUN: llc -mtriple=riscv32 -global-merge-on-external=false \
; RUN: -verify-machineinstrs < %s | FileCheck %s
; RUN: llc -mtriple=riscv64 -global-merge-on-external=false \
; RUN: -verify-machineinstrs < %s | FileCheck %s
; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefix=CHECK-WEXTERN %s
; RUN: llc -mtriple=riscv64 \
; RUN: -riscv-force-enable-global-merge-external-globals -verify-machineinstrs < %s \
; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
; RUN: | FileCheck -check-prefix=CHECK-WEXTERN %s

@ig1 = internal global i32 0, align 4
Expand Down
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