shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions 7 Packages Projects Releases Wiki Activity
llvm-project/llvm/test/CodeGen/WebAssembly/memcmp-expand.ll
Jasmine Tang d32793ca6e
Revert "[WebAssembly] Combine i128 to v16i8 for setcc & expand memcmp for 16 byte loads with simd128" (#153360) 
Reverts llvm/llvm-project#149461

The first test w/ memcmp in `test/neon/test_neon_wasm_simd.cpp` in the
Emscripten test suite has failed. This PR applies a revert so I can take
a closer look at it

Test case link:
https://github.com/emscripten-core/emscripten/blob/main/test/neon/test_neon_wasm_simd.cpp

Compile option: `em++ test_neon_wasm_simd.cpp -O2 -mfpu=neon -msimd128
-o something.js`

Original comment report:
https://github.com/llvm/llvm-project/pull/149461#issuecomment-3181652746
2025-08-13 07:41:44 +00:00

152 lines
5.6 KiB
LLVM
Raw Blame History

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
; RUN: llc < %s -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s
target triple = "wasm32-unknown-unknown"
declare i32 @memcmp(ptr, ptr, i32)
define i1 @memcmp_expand_3(ptr %a, ptr %b) {
; CHECK-LABEL: memcmp_expand_3:
; CHECK: .functype memcmp_expand_3 (i32, i32) -> (i32)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: i32.load16_u $push7=, 0($0):p2align=0
; CHECK-NEXT: i32.load16_u $push6=, 0($1):p2align=0
; CHECK-NEXT: i32.xor $push8=, $pop7, $pop6
; CHECK-NEXT: i32.const $push0=, 2
; CHECK-NEXT: i32.add $push3=, $0, $pop0
; CHECK-NEXT: i32.load8_u $push4=, 0($pop3)
; CHECK-NEXT: i32.const $push13=, 2
; CHECK-NEXT: i32.add $push1=, $1, $pop13
; CHECK-NEXT: i32.load8_u $push2=, 0($pop1)
; CHECK-NEXT: i32.xor $push5=, $pop4, $pop2
; CHECK-NEXT: i32.or $push9=, $pop8, $pop5
; CHECK-NEXT: i32.const $push10=, 65535
; CHECK-NEXT: i32.and $push11=, $pop9, $pop10
; CHECK-NEXT: i32.eqz $push12=, $pop11
; CHECK-NEXT: return $pop12
%cmp_3 = call i32 @memcmp(ptr %a, ptr %b, i32 3)
%res = icmp eq i32 %cmp_3, 0
ret i1 %res
}
define i1 @memcmp_expand_5(ptr %a, ptr %b) {
; CHECK-LABEL: memcmp_expand_5:
; CHECK: .functype memcmp_expand_5 (i32, i32) -> (i32)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: i32.load $push7=, 0($0):p2align=0
; CHECK-NEXT: i32.load $push6=, 0($1):p2align=0
; CHECK-NEXT: i32.xor $push8=, $pop7, $pop6
; CHECK-NEXT: i32.const $push0=, 4
; CHECK-NEXT: i32.add $push3=, $0, $pop0
; CHECK-NEXT: i32.load8_u $push4=, 0($pop3)
; CHECK-NEXT: i32.const $push11=, 4
; CHECK-NEXT: i32.add $push1=, $1, $pop11
; CHECK-NEXT: i32.load8_u $push2=, 0($pop1)
; CHECK-NEXT: i32.xor $push5=, $pop4, $pop2
; CHECK-NEXT: i32.or $push9=, $pop8, $pop5
; CHECK-NEXT: i32.eqz $push10=, $pop9
; CHECK-NEXT: return $pop10
%cmp_5 = call i32 @memcmp(ptr %a, ptr %b, i32 5)
%res = icmp eq i32 %cmp_5, 0
ret i1 %res
}
define i1 @memcmp_expand_7(ptr %a, ptr %b) {
; CHECK-LABEL: memcmp_expand_7:
; CHECK: .functype memcmp_expand_7 (i32, i32) -> (i32)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: i32.load $push7=, 0($0):p2align=0
; CHECK-NEXT: i32.load $push6=, 0($1):p2align=0
; CHECK-NEXT: i32.xor $push8=, $pop7, $pop6
; CHECK-NEXT: i32.const $push0=, 3
; CHECK-NEXT: i32.add $push3=, $0, $pop0
; CHECK-NEXT: i32.load $push4=, 0($pop3):p2align=0
; CHECK-NEXT: i32.const $push11=, 3
; CHECK-NEXT: i32.add $push1=, $1, $pop11
; CHECK-NEXT: i32.load $push2=, 0($pop1):p2align=0
; CHECK-NEXT: i32.xor $push5=, $pop4, $pop2
; CHECK-NEXT: i32.or $push9=, $pop8, $pop5
; CHECK-NEXT: i32.eqz $push10=, $pop9
; CHECK-NEXT: return $pop10
%cmp_7 = call i32 @memcmp(ptr %a, ptr %b, i32 7)
%res = icmp eq i32 %cmp_7, 0
ret i1 %res
}
; INFO: Negative test
; Should not expand even with simd128
define i1 @memcmp_expand_129(ptr %a, ptr %b) {
; CHECK-LABEL: memcmp_expand_129:
; CHECK: .functype memcmp_expand_129 (i32, i32) -> (i32)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: i32.const $push0=, 129
; CHECK-NEXT: call $push1=, memcmp, $0, $1, $pop0
; CHECK-NEXT: i32.eqz $push2=, $pop1
; CHECK-NEXT: return $pop2
%cmp_129 = call i32 @memcmp(ptr %a, ptr %b, i32 129)
%res = icmp eq i32 %cmp_129, 0
ret i1 %res
}
define i1 @memcmp_expand_2(ptr %a, ptr %b) {
; CHECK-LABEL: memcmp_expand_2:
; CHECK: .functype memcmp_expand_2 (i32, i32) -> (i32)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: i32.load16_u $push1=, 0($0):p2align=0
; CHECK-NEXT: i32.load16_u $push0=, 0($1):p2align=0
; CHECK-NEXT: i32.eq $push2=, $pop1, $pop0
; CHECK-NEXT: return $pop2
%cmp_2 = call i32 @memcmp(ptr %a, ptr %b, i32 2)
%res = icmp eq i32 %cmp_2, 0
ret i1 %res
}
define i1 @memcmp_expand_2_align(ptr align(2) %a, ptr align(2) %b) {
; CHECK-LABEL: memcmp_expand_2_align:
; CHECK: .functype memcmp_expand_2_align (i32, i32) -> (i32)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: i32.load16_u $push1=, 0($0)
; CHECK-NEXT: i32.load16_u $push0=, 0($1)
; CHECK-NEXT: i32.eq $push2=, $pop1, $pop0
; CHECK-NEXT: return $pop2
%cmp_2 = call i32 @memcmp(ptr %a, ptr %b, i32 2)
%res = icmp eq i32 %cmp_2, 0
ret i1 %res
}
define i1 @memcmp_expand_8(ptr %a, ptr %b) {
; CHECK-LABEL: memcmp_expand_8:
; CHECK: .functype memcmp_expand_8 (i32, i32) -> (i32)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: i64.load $push1=, 0($0):p2align=0
; CHECK-NEXT: i64.load $push0=, 0($1):p2align=0
; CHECK-NEXT: i64.eq $push2=, $pop1, $pop0
; CHECK-NEXT: return $pop2
%cmp_8 = call i32 @memcmp(ptr %a, ptr %b, i32 8)
%res = icmp eq i32 %cmp_8, 0
ret i1 %res
}
; TODO: Should be using a single load i64x2 or equivalent in bitsizes
define i1 @memcmp_expand_16(ptr %a, ptr %b) {
; CHECK-LABEL: memcmp_expand_16:
; CHECK: .functype memcmp_expand_16 (i32, i32) -> (i32)
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: i64.load $push7=, 0($0):p2align=0
; CHECK-NEXT: i64.load $push6=, 0($1):p2align=0
; CHECK-NEXT: i64.xor $push8=, $pop7, $pop6
; CHECK-NEXT: i32.const $push0=, 8
; CHECK-NEXT: i32.add $push3=, $0, $pop0
; CHECK-NEXT: i64.load $push4=, 0($pop3):p2align=0
; CHECK-NEXT: i32.const $push11=, 8
; CHECK-NEXT: i32.add $push1=, $1, $pop11
; CHECK-NEXT: i64.load $push2=, 0($pop1):p2align=0
; CHECK-NEXT: i64.xor $push5=, $pop4, $pop2
; CHECK-NEXT: i64.or $push9=, $pop8, $pop5
; CHECK-NEXT: i64.eqz $push10=, $pop9
; CHECK-NEXT: return $pop10
%cmp_16 = call i32 @memcmp(ptr %a, ptr %b, i32 16)
%res = icmp eq i32 %cmp_16, 0
ret i1 %res
}
Reference in New Issue View Git Blame Copy Permalink