[llvm] e0e998f - [GlobalIsel][X86]] Legalize G_CONSTANT_FOLD_BARRIER
Thorsten Schütt via llvm-commits
llvm-commits at lists.llvm.org
Sat Jun 24 08:19:57 PDT 2023
Author: Thorsten Schütt
Date: 2023-06-24T17:19:51+02:00
New Revision: e0e998f8d8ec83e69fb00062fb7a515451e42d8d
URL: https://github.com/llvm/llvm-project/commit/e0e998f8d8ec83e69fb00062fb7a515451e42d8d
DIFF: https://github.com/llvm/llvm-project/commit/e0e998f8d8ec83e69fb00062fb7a515451e42d8d.diff
LOG: [GlobalIsel][X86]] Legalize G_CONSTANT_FOLD_BARRIER
Reviewed By: RKSimon
Differential Revision: https://reviews.llvm.org/D153684
Added:
llvm/test/CodeGen/X86/GlobalISel/legalize-constant-fold.mir
Modified:
llvm/lib/Target/X86/X86LegalizerInfo.cpp
Removed:
################################################################################
diff --git a/llvm/lib/Target/X86/X86LegalizerInfo.cpp b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
index 2d089326c0ebb..49a0f69413fc3 100644
--- a/llvm/lib/Target/X86/X86LegalizerInfo.cpp
+++ b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
@@ -525,7 +525,7 @@ X86LegalizerInfo::X86LegalizerInfo(const X86Subtarget &STI,
.minScalar(0, LLT::scalar(32))
.libcall();
- getActionDefinitionsBuilder(G_FREEZE)
+ getActionDefinitionsBuilder({G_FREEZE, G_CONSTANT_FOLD_BARRIER})
.legalFor({s8, s16, s32, s64, p0})
.widenScalarToNextPow2(0, /*Min=*/8)
.clampScalar(0, s8, sMaxScalar);
diff --git a/llvm/test/CodeGen/X86/GlobalISel/legalize-constant-fold.mir b/llvm/test/CodeGen/X86/GlobalISel/legalize-constant-fold.mir
new file mode 100644
index 0000000000000..424c0e67d7edd
--- /dev/null
+++ b/llvm/test/CodeGen/X86/GlobalISel/legalize-constant-fold.mir
@@ -0,0 +1,66 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 2
+# RUN: llc -mtriple=i386-linux-gnu -run-pass=legalizer %s -o - | FileCheck %s --check-prefix=X86-32
+
+# test constant fold barrier
+
+...
+---
+name: test_fold64
+body: |
+ bb.0:
+ ; X86-32-LABEL: name: test_fold64
+ ; X86-32: [[DEF:%[0-9]+]]:_(s64) = IMPLICIT_DEF
+ ; X86-32-NEXT: [[CONSTANT_FOLD_BARRIER:%[0-9]+]]:_(s64) = G_CONSTANT_FOLD_BARRIER [[DEF]]
+ ; X86-32-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY [[CONSTANT_FOLD_BARRIER]](s64)
+ ; X86-32-NEXT: RET 0, implicit [[COPY]](s64)
+ %0:_(s64) = IMPLICIT_DEF
+ %1:_(s64) = G_CONSTANT_FOLD_BARRIER %0
+ %2:_(s64) = COPY %1(s64)
+ RET 0, implicit %2
+
+...
+---
+name: test_fold32
+body: |
+ bb.0:
+ ; X86-32-LABEL: name: test_fold32
+ ; X86-32: [[DEF:%[0-9]+]]:_(s32) = IMPLICIT_DEF
+ ; X86-32-NEXT: [[CONSTANT_FOLD_BARRIER:%[0-9]+]]:_(s32) = G_CONSTANT_FOLD_BARRIER [[DEF]]
+ ; X86-32-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY [[CONSTANT_FOLD_BARRIER]](s32)
+ ; X86-32-NEXT: RET 0, implicit [[COPY]](s32)
+ %0:_(s32) = IMPLICIT_DEF
+ %1:_(s32) = G_CONSTANT_FOLD_BARRIER %0
+ %2:_(s32) = COPY %1(s32)
+ RET 0, implicit %2
+
+...
+---
+name: test_fold16
+body: |
+ bb.0:
+ ; X86-32-LABEL: name: test_fold16
+ ; X86-32: [[DEF:%[0-9]+]]:_(s16) = IMPLICIT_DEF
+ ; X86-32-NEXT: [[CONSTANT_FOLD_BARRIER:%[0-9]+]]:_(s16) = G_CONSTANT_FOLD_BARRIER [[DEF]]
+ ; X86-32-NEXT: [[COPY:%[0-9]+]]:_(s16) = COPY [[CONSTANT_FOLD_BARRIER]](s16)
+ ; X86-32-NEXT: RET 0, implicit [[COPY]](s16)
+ %0:_(s16) = IMPLICIT_DEF
+ %1:_(s16) = G_CONSTANT_FOLD_BARRIER %0
+ %2:_(s16) = COPY %1(s16)
+ RET 0, implicit %2
+
+...
+---
+name: test_fold8
+body: |
+ bb.0:
+ ; X86-32-LABEL: name: test_fold8
+ ; X86-32: [[DEF:%[0-9]+]]:_(s8) = IMPLICIT_DEF
+ ; X86-32-NEXT: [[CONSTANT_FOLD_BARRIER:%[0-9]+]]:_(s8) = G_CONSTANT_FOLD_BARRIER [[DEF]]
+ ; X86-32-NEXT: [[COPY:%[0-9]+]]:_(s8) = COPY [[CONSTANT_FOLD_BARRIER]](s8)
+ ; X86-32-NEXT: RET 0, implicit [[COPY]](s8)
+ %0:_(s8) = IMPLICIT_DEF
+ %1:_(s8) = G_CONSTANT_FOLD_BARRIER %0
+ %2:_(s8) = COPY %1(s8)
+ RET 0, implicit %2
+
+...
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