[llvm] 8e4b089 - [LoongArch] Return true from shouldConsiderGEPOffsetSplit (#88371)
via llvm-commits
llvm-commits at lists.llvm.org
Sun Apr 14 18:01:08 PDT 2024
Author: wanglei
Date: 2024-04-15T09:01:04+08:00
New Revision: 8e4b0890a61088ae55b4bccbb59e5c5e10d28385
URL: https://github.com/llvm/llvm-project/commit/8e4b0890a61088ae55b4bccbb59e5c5e10d28385
DIFF: https://github.com/llvm/llvm-project/commit/8e4b0890a61088ae55b4bccbb59e5c5e10d28385.diff
LOG: [LoongArch] Return true from shouldConsiderGEPOffsetSplit (#88371)
If not performing gep splits can prevent important optimizations, such
as preventing the element indices / member offsets from being
(partially) folded into load/store instruction immediates.
Added:
Modified:
llvm/lib/Target/LoongArch/LoongArchISelLowering.h
llvm/test/Transforms/CodeGenPrepare/LoongArch/splitgep.ll
Removed:
################################################################################
diff --git a/llvm/lib/Target/LoongArch/LoongArchISelLowering.h b/llvm/lib/Target/LoongArch/LoongArchISelLowering.h
index 9e9ac0b8269291..4bb6c049f8d758 100644
--- a/llvm/lib/Target/LoongArch/LoongArchISelLowering.h
+++ b/llvm/lib/Target/LoongArch/LoongArchISelLowering.h
@@ -238,6 +238,7 @@ class LoongArchTargetLowering : public TargetLowering {
bool isShuffleMaskLegal(ArrayRef<int> Mask, EVT VT) const override {
return false;
}
+ bool shouldConsiderGEPOffsetSplit() const override { return true; }
private:
/// Target-specific function used to lower LoongArch calling conventions.
diff --git a/llvm/test/Transforms/CodeGenPrepare/LoongArch/splitgep.ll b/llvm/test/Transforms/CodeGenPrepare/LoongArch/splitgep.ll
index ca2a16a0ca7ecd..20cc25e95adf97 100644
--- a/llvm/test/Transforms/CodeGenPrepare/LoongArch/splitgep.ll
+++ b/llvm/test/Transforms/CodeGenPrepare/LoongArch/splitgep.ll
@@ -4,9 +4,9 @@
define void @test(ptr %sp, ptr %t, i32 %n) {
; CHECK-LABEL: @test(
; CHECK-NEXT: entry:
-; CHECK-NEXT: %s = load ptr, ptr %sp, align 8
-; CHECK-NEXT: br label %while_cond
-
+; CHECK-NEXT: %splitgep1 = getelementptr i8, ptr %t, i64 80000
+; CHECK-NEXT: %s = load ptr, ptr %sp
+; CHECK-NEXT: %splitgep = getelementptr i8, ptr %s, i64 80000
entry:
%s = load ptr, ptr %sp
br label %while_cond
More information about the llvm-commits
mailing list