[llvm] [LoongArch][NFC] Pre-commit tests for sitofp(load) combine (PR #165521)

[Zhaoxin Yang via llvm-commits]

https://github.com/ylzsx created https://github.com/llvm/llvm-project/pull/165521

None

>From 07c92bfc0b06f58972038fe91627a7abbdba07d7 Mon Sep 17 00:00:00 2001
From: yangzhaoxin <yangzhaoxin at loongson.cn>
Date: Wed, 29 Oct 2025 14:25:58 +0800
Subject: [PATCH] [LoongArch][NFC] Pre-commit tests for load-sitofp-combine.

---
 .../CodeGen/LoongArch/load-itofp-combine.ll   | 89 +++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 llvm/test/CodeGen/LoongArch/load-itofp-combine.ll

diff --git a/llvm/test/CodeGen/LoongArch/load-itofp-combine.ll b/llvm/test/CodeGen/LoongArch/load-itofp-combine.ll
new file mode 100644
index 0000000000000..f9b14be99b1ef
--- /dev/null
+++ b/llvm/test/CodeGen/LoongArch/load-itofp-combine.ll
@@ -0,0 +1,89 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
+; RUN: llc --mtriple=loongarch32 --mattr=+f,-d < %s | FileCheck %s --check-prefix=LA32F
+; RUN: llc --mtriple=loongarch32 --mattr=+d < %s | FileCheck %s --check-prefix=LA32D
+; RUN: llc --mtriple=loongarch64 --mattr=+f,-d < %s | FileCheck %s --check-prefix=LA64F
+; RUN: llc --mtriple=loongarch64 --mattr=+d < %s | FileCheck %s --check-prefix=LA64D
+
+define float @load_sitofp_f32(ptr %src) nounwind {
+; LA32F-LABEL: load_sitofp_f32:
+; LA32F:       # %bb.0:
+; LA32F-NEXT:    ld.w $a0, $a0, 0
+; LA32F-NEXT:    movgr2fr.w $fa0, $a0
+; LA32F-NEXT:    ffint.s.w $fa0, $fa0
+; LA32F-NEXT:    ret
+;
+; LA32D-LABEL: load_sitofp_f32:
+; LA32D:       # %bb.0:
+; LA32D-NEXT:    ld.w $a0, $a0, 0
+; LA32D-NEXT:    movgr2fr.w $fa0, $a0
+; LA32D-NEXT:    ffint.s.w $fa0, $fa0
+; LA32D-NEXT:    ret
+;
+; LA64F-LABEL: load_sitofp_f32:
+; LA64F:       # %bb.0:
+; LA64F-NEXT:    addi.d $sp, $sp, -16
+; LA64F-NEXT:    st.d $ra, $sp, 8 # 8-byte Folded Spill
+; LA64F-NEXT:    ld.w $a0, $a0, 0
+; LA64F-NEXT:    pcaddu18i $ra, %call36(__floatdisf)
+; LA64F-NEXT:    jirl $ra, $ra, 0
+; LA64F-NEXT:    ld.d $ra, $sp, 8 # 8-byte Folded Reload
+; LA64F-NEXT:    addi.d $sp, $sp, 16
+; LA64F-NEXT:    ret
+;
+; LA64D-LABEL: load_sitofp_f32:
+; LA64D:       # %bb.0:
+; LA64D-NEXT:    ld.w $a0, $a0, 0
+; LA64D-NEXT:    movgr2fr.w $fa0, $a0
+; LA64D-NEXT:    ffint.s.w $fa0, $fa0
+; LA64D-NEXT:    ret
+  %1 = load i32, ptr %src
+  %2 = sitofp i32 %1 to float
+  ret float %2
+}
+
+define double @load_sitofp_f64(ptr %src) nounwind {
+; LA32F-LABEL: load_sitofp_f64:
+; LA32F:       # %bb.0:
+; LA32F-NEXT:    addi.w $sp, $sp, -16
+; LA32F-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
+; LA32F-NEXT:    ld.w $a2, $a0, 0
+; LA32F-NEXT:    ld.w $a1, $a0, 4
+; LA32F-NEXT:    move $a0, $a2
+; LA32F-NEXT:    bl __floatdidf
+; LA32F-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
+; LA32F-NEXT:    addi.w $sp, $sp, 16
+; LA32F-NEXT:    ret
+;
+; LA32D-LABEL: load_sitofp_f64:
+; LA32D:       # %bb.0:
+; LA32D-NEXT:    addi.w $sp, $sp, -16
+; LA32D-NEXT:    st.w $ra, $sp, 12 # 4-byte Folded Spill
+; LA32D-NEXT:    ld.w $a2, $a0, 0
+; LA32D-NEXT:    ld.w $a1, $a0, 4
+; LA32D-NEXT:    move $a0, $a2
+; LA32D-NEXT:    bl __floatdidf
+; LA32D-NEXT:    ld.w $ra, $sp, 12 # 4-byte Folded Reload
+; LA32D-NEXT:    addi.w $sp, $sp, 16
+; LA32D-NEXT:    ret
+;
+; LA64F-LABEL: load_sitofp_f64:
+; LA64F:       # %bb.0:
+; LA64F-NEXT:    addi.d $sp, $sp, -16
+; LA64F-NEXT:    st.d $ra, $sp, 8 # 8-byte Folded Spill
+; LA64F-NEXT:    ld.d $a0, $a0, 0
+; LA64F-NEXT:    pcaddu18i $ra, %call36(__floatdidf)
+; LA64F-NEXT:    jirl $ra, $ra, 0
+; LA64F-NEXT:    ld.d $ra, $sp, 8 # 8-byte Folded Reload
+; LA64F-NEXT:    addi.d $sp, $sp, 16
+; LA64F-NEXT:    ret
+;
+; LA64D-LABEL: load_sitofp_f64:
+; LA64D:       # %bb.0:
+; LA64D-NEXT:    ld.d $a0, $a0, 0
+; LA64D-NEXT:    movgr2fr.d $fa0, $a0
+; LA64D-NEXT:    ffint.d.l $fa0, $fa0
+; LA64D-NEXT:    ret
+  %1 = load i64, ptr %src
+  %2 = sitofp i64 %1 to double
+  ret double %2
+}