[llvm] [DAG] Fold (and X, (bswap/bitreverse (not Y))) -> (and X, (not (bswap/bitreverse Y))) on ANDNOT capable targets (PR #112547)
Simon Pilgrim via llvm-commits
llvm-commits at lists.llvm.org
Fri Oct 18 09:59:33 PDT 2024
https://github.com/RKSimon updated https://github.com/llvm/llvm-project/pull/112547
>From f6a703842c5d66126a693addb970b4e3a83a1e0c Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev at redking.me.uk>
Date: Wed, 16 Oct 2024 14:59:00 +0100
Subject: [PATCH] [DAG] Fold (and X, (bswap/bitreverse (not Y))) -> (and X,
(not (bswap/bitreverse Y))) on ANDNOT capable targets
Fixes #112425
---
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 15 +
llvm/test/CodeGen/X86/andnot-patterns.ll | 439 ++++++++++++------
2 files changed, 303 insertions(+), 151 deletions(-)
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 98eed6b7503d10..7caf1644845cd2 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -7350,6 +7350,21 @@ SDValue DAGCombiner::visitAND(SDNode *N) {
if (SDValue R = foldLogicOfShifts(N, N1, N0, DAG))
return R;
+ // If the target supports ANDNOT, attempt to reconstruct an ANDNOT pattern
+ // that might have become separated by a bitwise-agnostic instruction.
+ if (TLI.hasAndNot(SDValue(N, 0))) {
+ SDValue X, Y;
+
+ // Fold (and X, (bswap (not Y))) -> (and X, (not (bswap Y)))
+ // Fold (and X, (bitreverse (not Y))) -> (and X, (not (bitreverse Y)))
+ for (unsigned Opc : {ISD::BSWAP, ISD::BITREVERSE})
+ if (sd_match(N, m_And(m_Value(X),
+ m_OneUse(m_UnaryOp(Opc, m_Not(m_Value(Y)))))) &&
+ !sd_match(X, m_Not(m_Value())))
+ return DAG.getNode(ISD::AND, DL, VT, X,
+ DAG.getNOT(DL, DAG.getNode(Opc, DL, VT, Y), VT));
+ }
+
// Masking the negated extension of a boolean is just the zero-extended
// boolean:
// and (sub 0, zext(bool X)), 1 --> zext(bool X)
diff --git a/llvm/test/CodeGen/X86/andnot-patterns.ll b/llvm/test/CodeGen/X86/andnot-patterns.ll
index 101e4ed008f7b6..d287ca28f5b961 100644
--- a/llvm/test/CodeGen/X86/andnot-patterns.ll
+++ b/llvm/test/CodeGen/X86/andnot-patterns.ll
@@ -321,25 +321,41 @@ define i8 @andnot_rotr_i8(i8 %a0, i8 %a1, i8 %a2) nounwind {
;
define i64 @andnot_bswap_i64(i64 %a0, i64 %a1) nounwind {
-; X86-LABEL: andnot_bswap_i64:
-; X86: # %bb.0:
-; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
-; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
-; X86-NEXT: notl %eax
-; X86-NEXT: notl %edx
-; X86-NEXT: bswapl %edx
-; X86-NEXT: bswapl %eax
-; X86-NEXT: andl {{[0-9]+}}(%esp), %eax
-; X86-NEXT: andl {{[0-9]+}}(%esp), %edx
-; X86-NEXT: retl
+; X86-NOBMI-LABEL: andnot_bswap_i64:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: notl %edx
+; X86-NOBMI-NEXT: bswapl %edx
+; X86-NOBMI-NEXT: bswapl %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: retl
;
-; X64-LABEL: andnot_bswap_i64:
-; X64: # %bb.0:
-; X64-NEXT: movq %rsi, %rax
-; X64-NEXT: notq %rax
-; X64-NEXT: bswapq %rax
-; X64-NEXT: andq %rdi, %rax
-; X64-NEXT: retq
+; X86-BMI-LABEL: andnot_bswap_i64:
+; X86-BMI: # %bb.0:
+; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI-NEXT: bswapl %eax
+; X86-BMI-NEXT: andnl {{[0-9]+}}(%esp), %eax, %eax
+; X86-BMI-NEXT: bswapl %ecx
+; X86-BMI-NEXT: andnl {{[0-9]+}}(%esp), %ecx, %edx
+; X86-BMI-NEXT: retl
+;
+; X64-NOBMI-LABEL: andnot_bswap_i64:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movq %rsi, %rax
+; X64-NOBMI-NEXT: notq %rax
+; X64-NOBMI-NEXT: bswapq %rax
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI-LABEL: andnot_bswap_i64:
+; X64-BMI: # %bb.0:
+; X64-BMI-NEXT: bswapq %rsi
+; X64-BMI-NEXT: andnq %rdi, %rsi, %rax
+; X64-BMI-NEXT: retq
%not = xor i64 %a1, -1
%bswap = tail call i64 @llvm.bswap.i64(i64 %not)
%and = and i64 %bswap, %a0
@@ -347,21 +363,34 @@ define i64 @andnot_bswap_i64(i64 %a0, i64 %a1) nounwind {
}
define i32 @andnot_bswap_i32(i32 %a0, i32 %a1) nounwind {
-; X86-LABEL: andnot_bswap_i32:
-; X86: # %bb.0:
-; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
-; X86-NEXT: notl %eax
-; X86-NEXT: bswapl %eax
-; X86-NEXT: andl {{[0-9]+}}(%esp), %eax
-; X86-NEXT: retl
+; X86-NOBMI-LABEL: andnot_bswap_i32:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: bswapl %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
;
-; X64-LABEL: andnot_bswap_i32:
-; X64: # %bb.0:
-; X64-NEXT: movl %esi, %eax
-; X64-NEXT: notl %eax
-; X64-NEXT: bswapl %eax
-; X64-NEXT: andl %edi, %eax
-; X64-NEXT: retq
+; X86-BMI-LABEL: andnot_bswap_i32:
+; X86-BMI: # %bb.0:
+; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI-NEXT: bswapl %eax
+; X86-BMI-NEXT: andnl {{[0-9]+}}(%esp), %eax, %eax
+; X86-BMI-NEXT: retl
+;
+; X64-NOBMI-LABEL: andnot_bswap_i32:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl %esi, %eax
+; X64-NOBMI-NEXT: notl %eax
+; X64-NOBMI-NEXT: bswapl %eax
+; X64-NOBMI-NEXT: andl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI-LABEL: andnot_bswap_i32:
+; X64-BMI: # %bb.0:
+; X64-BMI-NEXT: bswapl %esi
+; X64-BMI-NEXT: andnl %edi, %esi, %eax
+; X64-BMI-NEXT: retq
%not = xor i32 %a1, -1
%bswap = tail call i32 @llvm.bswap.i32(i32 %not)
%and = and i32 %bswap, %a0
@@ -397,75 +426,142 @@ define i16 @andnot_bswap_i16(i16 %a0, i16 %a1) nounwind {
;
define i64 @andnot_bitreverse_i64(i64 %a0, i64 %a1) nounwind {
-; X86-LABEL: andnot_bitreverse_i64:
-; X86: # %bb.0:
-; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
-; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
-; X86-NEXT: notl %eax
-; X86-NEXT: notl %ecx
-; X86-NEXT: bswapl %ecx
-; X86-NEXT: movl %ecx, %edx
-; X86-NEXT: andl $252645135, %edx # imm = 0xF0F0F0F
-; X86-NEXT: shll $4, %edx
-; X86-NEXT: shrl $4, %ecx
-; X86-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
-; X86-NEXT: orl %edx, %ecx
-; X86-NEXT: movl %ecx, %edx
-; X86-NEXT: andl $858993459, %edx # imm = 0x33333333
-; X86-NEXT: shrl $2, %ecx
-; X86-NEXT: andl $858993459, %ecx # imm = 0x33333333
-; X86-NEXT: leal (%ecx,%edx,4), %ecx
-; X86-NEXT: movl %ecx, %edx
-; X86-NEXT: andl $1431655765, %edx # imm = 0x55555555
-; X86-NEXT: shrl %ecx
-; X86-NEXT: andl $1431655765, %ecx # imm = 0x55555555
-; X86-NEXT: leal (%ecx,%edx,2), %edx
-; X86-NEXT: bswapl %eax
-; X86-NEXT: movl %eax, %ecx
-; X86-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
-; X86-NEXT: shll $4, %ecx
-; X86-NEXT: shrl $4, %eax
-; X86-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
-; X86-NEXT: orl %ecx, %eax
-; X86-NEXT: movl %eax, %ecx
-; X86-NEXT: andl $858993459, %ecx # imm = 0x33333333
-; X86-NEXT: shrl $2, %eax
-; X86-NEXT: andl $858993459, %eax # imm = 0x33333333
-; X86-NEXT: leal (%eax,%ecx,4), %eax
-; X86-NEXT: movl %eax, %ecx
-; X86-NEXT: andl $1431655765, %ecx # imm = 0x55555555
-; X86-NEXT: shrl %eax
-; X86-NEXT: andl $1431655765, %eax # imm = 0x55555555
-; X86-NEXT: leal (%eax,%ecx,2), %eax
-; X86-NEXT: andl {{[0-9]+}}(%esp), %eax
-; X86-NEXT: andl {{[0-9]+}}(%esp), %edx
-; X86-NEXT: retl
+; X86-NOBMI-LABEL: andnot_bitreverse_i64:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: notl %ecx
+; X86-NOBMI-NEXT: bswapl %ecx
+; X86-NOBMI-NEXT: movl %ecx, %edx
+; X86-NOBMI-NEXT: andl $252645135, %edx # imm = 0xF0F0F0F
+; X86-NOBMI-NEXT: shll $4, %edx
+; X86-NOBMI-NEXT: shrl $4, %ecx
+; X86-NOBMI-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
+; X86-NOBMI-NEXT: orl %edx, %ecx
+; X86-NOBMI-NEXT: movl %ecx, %edx
+; X86-NOBMI-NEXT: andl $858993459, %edx # imm = 0x33333333
+; X86-NOBMI-NEXT: shrl $2, %ecx
+; X86-NOBMI-NEXT: andl $858993459, %ecx # imm = 0x33333333
+; X86-NOBMI-NEXT: leal (%ecx,%edx,4), %ecx
+; X86-NOBMI-NEXT: movl %ecx, %edx
+; X86-NOBMI-NEXT: andl $1431655765, %edx # imm = 0x55555555
+; X86-NOBMI-NEXT: shrl %ecx
+; X86-NOBMI-NEXT: andl $1431655765, %ecx # imm = 0x55555555
+; X86-NOBMI-NEXT: leal (%ecx,%edx,2), %edx
+; X86-NOBMI-NEXT: bswapl %eax
+; X86-NOBMI-NEXT: movl %eax, %ecx
+; X86-NOBMI-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
+; X86-NOBMI-NEXT: shll $4, %ecx
+; X86-NOBMI-NEXT: shrl $4, %eax
+; X86-NOBMI-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
+; X86-NOBMI-NEXT: orl %ecx, %eax
+; X86-NOBMI-NEXT: movl %eax, %ecx
+; X86-NOBMI-NEXT: andl $858993459, %ecx # imm = 0x33333333
+; X86-NOBMI-NEXT: shrl $2, %eax
+; X86-NOBMI-NEXT: andl $858993459, %eax # imm = 0x33333333
+; X86-NOBMI-NEXT: leal (%eax,%ecx,4), %eax
+; X86-NOBMI-NEXT: movl %eax, %ecx
+; X86-NOBMI-NEXT: andl $1431655765, %ecx # imm = 0x55555555
+; X86-NOBMI-NEXT: shrl %eax
+; X86-NOBMI-NEXT: andl $1431655765, %eax # imm = 0x55555555
+; X86-NOBMI-NEXT: leal (%eax,%ecx,2), %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: retl
;
-; X64-LABEL: andnot_bitreverse_i64:
-; X64: # %bb.0:
-; X64-NEXT: notq %rsi
-; X64-NEXT: bswapq %rsi
-; X64-NEXT: movq %rsi, %rax
-; X64-NEXT: shrq $4, %rax
-; X64-NEXT: movabsq $1085102592571150095, %rcx # imm = 0xF0F0F0F0F0F0F0F
-; X64-NEXT: andq %rcx, %rax
-; X64-NEXT: andq %rcx, %rsi
-; X64-NEXT: shlq $4, %rsi
-; X64-NEXT: orq %rax, %rsi
-; X64-NEXT: movabsq $3689348814741910323, %rax # imm = 0x3333333333333333
-; X64-NEXT: movq %rsi, %rcx
-; X64-NEXT: andq %rax, %rcx
-; X64-NEXT: shrq $2, %rsi
-; X64-NEXT: andq %rax, %rsi
-; X64-NEXT: leaq (%rsi,%rcx,4), %rax
-; X64-NEXT: movabsq $6148914691236517205, %rcx # imm = 0x5555555555555555
-; X64-NEXT: movq %rax, %rdx
-; X64-NEXT: andq %rcx, %rdx
-; X64-NEXT: shrq %rax
-; X64-NEXT: andq %rcx, %rax
-; X64-NEXT: leaq (%rax,%rdx,2), %rax
-; X64-NEXT: andq %rdi, %rax
-; X64-NEXT: retq
+; X86-BMI-LABEL: andnot_bitreverse_i64:
+; X86-BMI: # %bb.0:
+; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI-NEXT: bswapl %eax
+; X86-BMI-NEXT: movl %eax, %edx
+; X86-BMI-NEXT: andl $252645135, %edx # imm = 0xF0F0F0F
+; X86-BMI-NEXT: shll $4, %edx
+; X86-BMI-NEXT: shrl $4, %eax
+; X86-BMI-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
+; X86-BMI-NEXT: orl %edx, %eax
+; X86-BMI-NEXT: movl %eax, %edx
+; X86-BMI-NEXT: andl $858993459, %edx # imm = 0x33333333
+; X86-BMI-NEXT: shrl $2, %eax
+; X86-BMI-NEXT: andl $858993459, %eax # imm = 0x33333333
+; X86-BMI-NEXT: leal (%eax,%edx,4), %eax
+; X86-BMI-NEXT: movl %eax, %edx
+; X86-BMI-NEXT: andl $1431655765, %edx # imm = 0x55555555
+; X86-BMI-NEXT: shrl %eax
+; X86-BMI-NEXT: andl $1431655765, %eax # imm = 0x55555555
+; X86-BMI-NEXT: leal (%eax,%edx,2), %eax
+; X86-BMI-NEXT: andnl {{[0-9]+}}(%esp), %eax, %eax
+; X86-BMI-NEXT: bswapl %ecx
+; X86-BMI-NEXT: movl %ecx, %edx
+; X86-BMI-NEXT: andl $252645135, %edx # imm = 0xF0F0F0F
+; X86-BMI-NEXT: shll $4, %edx
+; X86-BMI-NEXT: shrl $4, %ecx
+; X86-BMI-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
+; X86-BMI-NEXT: orl %edx, %ecx
+; X86-BMI-NEXT: movl %ecx, %edx
+; X86-BMI-NEXT: andl $858993459, %edx # imm = 0x33333333
+; X86-BMI-NEXT: shrl $2, %ecx
+; X86-BMI-NEXT: andl $858993459, %ecx # imm = 0x33333333
+; X86-BMI-NEXT: leal (%ecx,%edx,4), %ecx
+; X86-BMI-NEXT: movl %ecx, %edx
+; X86-BMI-NEXT: andl $1431655765, %edx # imm = 0x55555555
+; X86-BMI-NEXT: shrl %ecx
+; X86-BMI-NEXT: andl $1431655765, %ecx # imm = 0x55555555
+; X86-BMI-NEXT: leal (%ecx,%edx,2), %ecx
+; X86-BMI-NEXT: andnl {{[0-9]+}}(%esp), %ecx, %edx
+; X86-BMI-NEXT: retl
+;
+; X64-NOBMI-LABEL: andnot_bitreverse_i64:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: notq %rsi
+; X64-NOBMI-NEXT: bswapq %rsi
+; X64-NOBMI-NEXT: movq %rsi, %rax
+; X64-NOBMI-NEXT: shrq $4, %rax
+; X64-NOBMI-NEXT: movabsq $1085102592571150095, %rcx # imm = 0xF0F0F0F0F0F0F0F
+; X64-NOBMI-NEXT: andq %rcx, %rax
+; X64-NOBMI-NEXT: andq %rcx, %rsi
+; X64-NOBMI-NEXT: shlq $4, %rsi
+; X64-NOBMI-NEXT: orq %rax, %rsi
+; X64-NOBMI-NEXT: movabsq $3689348814741910323, %rax # imm = 0x3333333333333333
+; X64-NOBMI-NEXT: movq %rsi, %rcx
+; X64-NOBMI-NEXT: andq %rax, %rcx
+; X64-NOBMI-NEXT: shrq $2, %rsi
+; X64-NOBMI-NEXT: andq %rax, %rsi
+; X64-NOBMI-NEXT: leaq (%rsi,%rcx,4), %rax
+; X64-NOBMI-NEXT: movabsq $6148914691236517205, %rcx # imm = 0x5555555555555555
+; X64-NOBMI-NEXT: movq %rax, %rdx
+; X64-NOBMI-NEXT: andq %rcx, %rdx
+; X64-NOBMI-NEXT: shrq %rax
+; X64-NOBMI-NEXT: andq %rcx, %rax
+; X64-NOBMI-NEXT: leaq (%rax,%rdx,2), %rax
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI-LABEL: andnot_bitreverse_i64:
+; X64-BMI: # %bb.0:
+; X64-BMI-NEXT: bswapq %rsi
+; X64-BMI-NEXT: movq %rsi, %rax
+; X64-BMI-NEXT: shrq $4, %rax
+; X64-BMI-NEXT: movabsq $1085102592571150095, %rcx # imm = 0xF0F0F0F0F0F0F0F
+; X64-BMI-NEXT: andq %rcx, %rax
+; X64-BMI-NEXT: andq %rcx, %rsi
+; X64-BMI-NEXT: shlq $4, %rsi
+; X64-BMI-NEXT: orq %rax, %rsi
+; X64-BMI-NEXT: movabsq $3689348814741910323, %rax # imm = 0x3333333333333333
+; X64-BMI-NEXT: movq %rsi, %rcx
+; X64-BMI-NEXT: andq %rax, %rcx
+; X64-BMI-NEXT: shrq $2, %rsi
+; X64-BMI-NEXT: andq %rax, %rsi
+; X64-BMI-NEXT: leaq (%rsi,%rcx,4), %rax
+; X64-BMI-NEXT: movabsq $6148914691236517205, %rcx # imm = 0x5555555555555555
+; X64-BMI-NEXT: movq %rax, %rdx
+; X64-BMI-NEXT: andq %rcx, %rdx
+; X64-BMI-NEXT: shrq %rax
+; X64-BMI-NEXT: andq %rcx, %rax
+; X64-BMI-NEXT: leaq (%rax,%rdx,2), %rax
+; X64-BMI-NEXT: andnq %rdi, %rax, %rax
+; X64-BMI-NEXT: retq
%not = xor i64 %a1, -1
%bitrev = tail call i64 @llvm.bitreverse.i64(i64 %not)
%and = and i64 %bitrev, %a0
@@ -473,53 +569,99 @@ define i64 @andnot_bitreverse_i64(i64 %a0, i64 %a1) nounwind {
}
define i32 @andnot_bitreverse_i32(i32 %a0, i32 %a1) nounwind {
-; X86-LABEL: andnot_bitreverse_i32:
-; X86: # %bb.0:
-; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
-; X86-NEXT: notl %eax
-; X86-NEXT: bswapl %eax
-; X86-NEXT: movl %eax, %ecx
-; X86-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
-; X86-NEXT: shll $4, %ecx
-; X86-NEXT: shrl $4, %eax
-; X86-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
-; X86-NEXT: orl %ecx, %eax
-; X86-NEXT: movl %eax, %ecx
-; X86-NEXT: andl $858993459, %ecx # imm = 0x33333333
-; X86-NEXT: shrl $2, %eax
-; X86-NEXT: andl $858993459, %eax # imm = 0x33333333
-; X86-NEXT: leal (%eax,%ecx,4), %eax
-; X86-NEXT: movl %eax, %ecx
-; X86-NEXT: andl $1431655765, %ecx # imm = 0x55555555
-; X86-NEXT: shrl %eax
-; X86-NEXT: andl $1431655765, %eax # imm = 0x55555555
-; X86-NEXT: leal (%eax,%ecx,2), %eax
-; X86-NEXT: andl {{[0-9]+}}(%esp), %eax
-; X86-NEXT: retl
+; X86-NOBMI-LABEL: andnot_bitreverse_i32:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: bswapl %eax
+; X86-NOBMI-NEXT: movl %eax, %ecx
+; X86-NOBMI-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
+; X86-NOBMI-NEXT: shll $4, %ecx
+; X86-NOBMI-NEXT: shrl $4, %eax
+; X86-NOBMI-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
+; X86-NOBMI-NEXT: orl %ecx, %eax
+; X86-NOBMI-NEXT: movl %eax, %ecx
+; X86-NOBMI-NEXT: andl $858993459, %ecx # imm = 0x33333333
+; X86-NOBMI-NEXT: shrl $2, %eax
+; X86-NOBMI-NEXT: andl $858993459, %eax # imm = 0x33333333
+; X86-NOBMI-NEXT: leal (%eax,%ecx,4), %eax
+; X86-NOBMI-NEXT: movl %eax, %ecx
+; X86-NOBMI-NEXT: andl $1431655765, %ecx # imm = 0x55555555
+; X86-NOBMI-NEXT: shrl %eax
+; X86-NOBMI-NEXT: andl $1431655765, %eax # imm = 0x55555555
+; X86-NOBMI-NEXT: leal (%eax,%ecx,2), %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
;
-; X64-LABEL: andnot_bitreverse_i32:
-; X64: # %bb.0:
-; X64-NEXT: # kill: def $esi killed $esi def $rsi
-; X64-NEXT: notl %esi
-; X64-NEXT: bswapl %esi
-; X64-NEXT: movl %esi, %eax
-; X64-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
-; X64-NEXT: shll $4, %eax
-; X64-NEXT: shrl $4, %esi
-; X64-NEXT: andl $252645135, %esi # imm = 0xF0F0F0F
-; X64-NEXT: orl %eax, %esi
-; X64-NEXT: movl %esi, %eax
-; X64-NEXT: andl $858993459, %eax # imm = 0x33333333
-; X64-NEXT: shrl $2, %esi
-; X64-NEXT: andl $858993459, %esi # imm = 0x33333333
-; X64-NEXT: leal (%rsi,%rax,4), %eax
-; X64-NEXT: movl %eax, %ecx
-; X64-NEXT: andl $1431655765, %ecx # imm = 0x55555555
-; X64-NEXT: shrl %eax
-; X64-NEXT: andl $1431655765, %eax # imm = 0x55555555
-; X64-NEXT: leal (%rax,%rcx,2), %eax
-; X64-NEXT: andl %edi, %eax
-; X64-NEXT: retq
+; X86-BMI-LABEL: andnot_bitreverse_i32:
+; X86-BMI: # %bb.0:
+; X86-BMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI-NEXT: bswapl %eax
+; X86-BMI-NEXT: movl %eax, %ecx
+; X86-BMI-NEXT: andl $252645135, %ecx # imm = 0xF0F0F0F
+; X86-BMI-NEXT: shll $4, %ecx
+; X86-BMI-NEXT: shrl $4, %eax
+; X86-BMI-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
+; X86-BMI-NEXT: orl %ecx, %eax
+; X86-BMI-NEXT: movl %eax, %ecx
+; X86-BMI-NEXT: andl $858993459, %ecx # imm = 0x33333333
+; X86-BMI-NEXT: shrl $2, %eax
+; X86-BMI-NEXT: andl $858993459, %eax # imm = 0x33333333
+; X86-BMI-NEXT: leal (%eax,%ecx,4), %eax
+; X86-BMI-NEXT: movl %eax, %ecx
+; X86-BMI-NEXT: andl $1431655765, %ecx # imm = 0x55555555
+; X86-BMI-NEXT: shrl %eax
+; X86-BMI-NEXT: andl $1431655765, %eax # imm = 0x55555555
+; X86-BMI-NEXT: leal (%eax,%ecx,2), %eax
+; X86-BMI-NEXT: andnl {{[0-9]+}}(%esp), %eax, %eax
+; X86-BMI-NEXT: retl
+;
+; X64-NOBMI-LABEL: andnot_bitreverse_i32:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: # kill: def $esi killed $esi def $rsi
+; X64-NOBMI-NEXT: notl %esi
+; X64-NOBMI-NEXT: bswapl %esi
+; X64-NOBMI-NEXT: movl %esi, %eax
+; X64-NOBMI-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
+; X64-NOBMI-NEXT: shll $4, %eax
+; X64-NOBMI-NEXT: shrl $4, %esi
+; X64-NOBMI-NEXT: andl $252645135, %esi # imm = 0xF0F0F0F
+; X64-NOBMI-NEXT: orl %eax, %esi
+; X64-NOBMI-NEXT: movl %esi, %eax
+; X64-NOBMI-NEXT: andl $858993459, %eax # imm = 0x33333333
+; X64-NOBMI-NEXT: shrl $2, %esi
+; X64-NOBMI-NEXT: andl $858993459, %esi # imm = 0x33333333
+; X64-NOBMI-NEXT: leal (%rsi,%rax,4), %eax
+; X64-NOBMI-NEXT: movl %eax, %ecx
+; X64-NOBMI-NEXT: andl $1431655765, %ecx # imm = 0x55555555
+; X64-NOBMI-NEXT: shrl %eax
+; X64-NOBMI-NEXT: andl $1431655765, %eax # imm = 0x55555555
+; X64-NOBMI-NEXT: leal (%rax,%rcx,2), %eax
+; X64-NOBMI-NEXT: andl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI-LABEL: andnot_bitreverse_i32:
+; X64-BMI: # %bb.0:
+; X64-BMI-NEXT: # kill: def $esi killed $esi def $rsi
+; X64-BMI-NEXT: bswapl %esi
+; X64-BMI-NEXT: movl %esi, %eax
+; X64-BMI-NEXT: andl $252645135, %eax # imm = 0xF0F0F0F
+; X64-BMI-NEXT: shll $4, %eax
+; X64-BMI-NEXT: shrl $4, %esi
+; X64-BMI-NEXT: andl $252645135, %esi # imm = 0xF0F0F0F
+; X64-BMI-NEXT: orl %eax, %esi
+; X64-BMI-NEXT: movl %esi, %eax
+; X64-BMI-NEXT: andl $858993459, %eax # imm = 0x33333333
+; X64-BMI-NEXT: shrl $2, %esi
+; X64-BMI-NEXT: andl $858993459, %esi # imm = 0x33333333
+; X64-BMI-NEXT: leal (%rsi,%rax,4), %eax
+; X64-BMI-NEXT: movl %eax, %ecx
+; X64-BMI-NEXT: andl $1431655765, %ecx # imm = 0x55555555
+; X64-BMI-NEXT: shrl %eax
+; X64-BMI-NEXT: andl $1431655765, %eax # imm = 0x55555555
+; X64-BMI-NEXT: leal (%rax,%rcx,2), %eax
+; X64-BMI-NEXT: andnl %edi, %eax, %eax
+; X64-BMI-NEXT: retq
%not = xor i32 %a1, -1
%bitrev = tail call i32 @llvm.bitreverse.i32(i32 %not)
%and = and i32 %bitrev, %a0
@@ -626,8 +768,3 @@ define i8 @andnot_bitreverse_i8(i8 %a0, i8 %a1) nounwind {
%and = and i8 %bitrev, %a0
ret i8 %and
}
-;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
-; X64-BMI: {{.*}}
-; X64-NOBMI: {{.*}}
-; X86-BMI: {{.*}}
-; X86-NOBMI: {{.*}}
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