[X86] Add additional tests for constant `srl/shl` + `and`; NFC

[goldstein.w.n]

Killing as this already seems to be reasonably well tested.

llvm/test/CodeGen/X86/const-shift-with-and.ll

+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=i686-unknown-unknown | FileCheck %s --check-prefix=X86
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=X64
+
+define i64 @and_shr_from_mask_i64(i64 %x) nounwind {
+; X86-LABEL: and_shr_from_mask_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movzbl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shrl $4, %eax
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shr_from_mask_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movzbl %dil, %eax
+; X64-NEXT:    shrq $4, %rax
+; X64-NEXT:    retq
+  %and = and i64 %x, 255
+  %shr = lshr i64 %and, 4
+  ret i64 %shr
+}
+
+define i32 @shr_and_from_mask_i32(i32 %x) nounwind {
+; X86-LABEL: shr_and_from_mask_i32:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shrl $6, %eax
+; X86-NEXT:    movzwl %ax, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: shr_and_from_mask_i32:
+; X64:       # %bb.0:
+; X64-NEXT:    shrl $6, %edi
+; X64-NEXT:    movzwl %di, %eax
+; X64-NEXT:    retq
+  %shr = lshr i32 %x, 6
+  %and = and i32 %shr, 65535
+  ret i32 %and
+}
+
+define i64 @and_shl_from_mask_i64(i64 %x) nounwind {
+; X86-LABEL: and_shl_from_mask_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movzwl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shll $8, %eax
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shl_from_mask_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movzwl %di, %eax
+; X64-NEXT:    shlq $8, %rax
+; X64-NEXT:    retq
+  %and = and i64 %x, 65535
+  %shl = shl i64 %and, 8
+  ret i64 %shl
+}
+
+define i16 @shl_and_from_mask_i16(i16 %x) nounwind {
+; X86-LABEL: shl_and_from_mask_i16:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shll $3, %eax
+; X86-NEXT:    movzbl %al, %eax
+; X86-NEXT:    # kill: def $ax killed $ax killed $eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: shl_and_from_mask_i16:
+; X64:       # %bb.0:
+; X64-NEXT:    shll $3, %edi
+; X64-NEXT:    movzbl %dil, %eax
+; X64-NEXT:    # kill: def $ax killed $ax killed $eax
+; X64-NEXT:    retq
+  %shl = shl i16 %x, 3
+  %and = and i16 %shl, 255
+  ret i16 %and
+}
+
+define i64 @and_shr_to_mask_i64(i64 %x) nounwind {
+; X86-LABEL: and_shr_to_mask_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movzbl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shrl $4, %eax
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shr_to_mask_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movzbl %dil, %eax
+; X64-NEXT:    shrq $4, %rax
+; X64-NEXT:    retq
+  %and = and i64 %x, 240
+  %shr = lshr i64 %and, 4
+  ret i64 %shr
+}
+
+define i32 @shr_and_to_mask_i32(i32 %x) nounwind {
+; X86-LABEL: shr_and_to_mask_i32:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shrl $6, %eax
+; X86-NEXT:    andl $1023, %eax # imm = 0x3FF
+; X86-NEXT:    retl
+;
+; X64-LABEL: shr_and_to_mask_i32:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    shrl $6, %eax
+; X64-NEXT:    andl $1023, %eax # imm = 0x3FF
+; X64-NEXT:    retq
+  %shr = lshr i32 %x, 6
+  %and = and i32 %shr, 1023
+  ret i32 %and
+}
+
+define i64 @and_shl_to_mask_i64(i64 %x) nounwind {
+; X86-LABEL: and_shl_to_mask_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl $511, %eax # imm = 0x1FF
+; X86-NEXT:    andl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shll $7, %eax
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shl_to_mask_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    andl $511, %eax # imm = 0x1FF
+; X64-NEXT:    shlq $7, %rax
+; X64-NEXT:    retq
+  %and = and i64 %x, 511
+  %shl = shl i64 %and, 7
+  ret i64 %shl
+}
+
+define i16 @shl_and_to_mask_i16(i16 %x) nounwind {
+; X86-LABEL: shl_and_to_mask_i16:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    addl %eax, %eax
+; X86-NEXT:    movzbl %al, %eax
+; X86-NEXT:    # kill: def $ax killed $ax killed $eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: shl_and_to_mask_i16:
+; X64:       # %bb.0:
+; X64-NEXT:    addl %edi, %edi
+; X64-NEXT:    movzbl %dil, %eax
+; X64-NEXT:    # kill: def $ax killed $ax killed $eax
+; X64-NEXT:    retq
+  %shl = shl i16 %x, 1
+  %and = and i16 %shl, 254
+  ret i16 %and
+}
+
+define i64 @shr_and_from_shrink_i64(i64 %x) nounwind {
+; X86-LABEL: shr_and_from_shrink_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shrl $6, %eax
+; X86-NEXT:    andl $511, %eax # imm = 0x1FF
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: shr_and_from_shrink_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    shrl $6, %eax
+; X64-NEXT:    andl $511, %eax # imm = 0x1FF
+; X64-NEXT:    retq
+  %shr = lshr i64 %x, 6
+  %and = and i64 %shr, 511
+  ret i64 %and
+}
+
+define i32 @and_shl_from_shrink_i32(i32 %x) nounwind {
+; X86-LABEL: and_shl_from_shrink_i32:
+; X86:       # %bb.0:
+; X86-NEXT:    movl $511, %eax # imm = 0x1FF
+; X86-NEXT:    andl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shll $8, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shl_from_shrink_i32:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    andl $511, %eax # imm = 0x1FF
+; X64-NEXT:    shll $8, %eax
+; X64-NEXT:    retq
+  %and = and i32 %x, 511
+  %shl = shl i32 %and, 8
+  ret i32 %shl
+}
+
+define i64 @and_shr_to_shrink_i64(i64 %x) nounwind {
+; X86-LABEL: and_shr_to_shrink_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl $64704, %eax # imm = 0xFCC0
+; X86-NEXT:    andl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shrl $6, %eax
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shr_to_shrink_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    andl $64704, %eax # imm = 0xFCC0
+; X64-NEXT:    shrq $6, %rax
+; X64-NEXT:    retq
+  %and = and i64 %x, 64704
+  %shr = lshr i64 %and, 6
+  ret i64 %shr
+}
+
+define i32 @shl_and_to_shrink_i32(i32 %x) nounwind {
+; X86-LABEL: shl_and_to_shrink_i32:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shll $8, %eax
+; X86-NEXT:    andl $130816, %eax # imm = 0x1FF00
+; X86-NEXT:    retl
+;
+; X64-LABEL: shl_and_to_shrink_i32:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    shll $8, %eax
+; X64-NEXT:    andl $130816, %eax # imm = 0x1FF00
+; X64-NEXT:    retq
+  %shl = shl i32 %x, 8
+  %and = and i32 %shl, 131071
+  ret i32 %and
+}
+
+define i64 @shr_and_from_shrink8_i64(i64 %x) nounwind {
+; X86-LABEL: shr_and_from_shrink8_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movzwl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    andl $63, %eax
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: shr_and_from_shrink8_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    shrl $16, %eax
+; X64-NEXT:    andl $63, %eax
+; X64-NEXT:    retq
+  %shr = lshr i64 %x, 16
+  %and = and i64 %shr, 63
+  ret i64 %and
+}
+
+define i16 @and_shl_from_shrink8_i16(i16 %x) nounwind {
+; X86-LABEL: and_shl_from_shrink8_i16:
+; X86:       # %bb.0:
+; X86-NEXT:    movzwl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    andl $63, %eax
+; X86-NEXT:    shll $5, %eax
+; X86-NEXT:    # kill: def $ax killed $ax killed $eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shl_from_shrink8_i16:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    andl $63, %eax
+; X64-NEXT:    shll $5, %eax
+; X64-NEXT:    # kill: def $ax killed $ax killed $eax
+; X64-NEXT:    retq
+  %and = and i16 %x, 63
+  %shl = shl i16 %and, 5
+  ret i16 %shl
+}
+
+define i64 @and_shr_to_shrink8_i64(i64 %x) nounwind {
+; X86-LABEL: and_shr_to_shrink8_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movzwl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    andl $63, %eax
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shr_to_shrink8_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    shrl $16, %eax
+; X64-NEXT:    andl $63, %eax
+; X64-NEXT:    retq
+  %and = and i64 %x, 4128768
+  %shr = lshr i64 %and, 16
+  ret i64 %shr
+}
+
+define i32 @shl_and_to_shrink8_i32(i32 %x) nounwind {
+; X86-LABEL: shl_and_to_shrink8_i32:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    andl $63, %eax
+; X86-NEXT:    shll $5, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: shl_and_to_shrink8_i32:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    andl $63, %eax
+; X64-NEXT:    shll $5, %eax
+; X64-NEXT:    retq
+  %shl = shl i32 %x, 5
+  %and = and i32 %shl, 2016
+  ret i32 %and
+}
+
+define i64 @shr_and_from_shrink32_i64(i64 %x) nounwind {
+; X86-LABEL: shr_and_from_shrink32_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shll $16, %eax
+; X86-NEXT:    andl $536870912, %eax # imm = 0x20000000
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: shr_and_from_shrink32_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    shrq $16, %rax
+; X64-NEXT:    andl $536870912, %eax # imm = 0x20000000
+; X64-NEXT:    retq
+  %shr = lshr i64 %x, 16
+  %and = and i64 %shr, 536870912
+  ret i64 %and
+}
+
+define i64 @and_shl_from_shrink32_i64(i64 %x) nounwind {
+; X86-LABEL: and_shl_from_shrink32_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl $-447369324, %edx # imm = 0xE555AF94
+; X86-NEXT:    andl {{[0-9]+}}(%esp), %edx
+; X86-NEXT:    movl %edx, %eax
+; X86-NEXT:    shll $5, %eax
+; X86-NEXT:    shrl $27, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shl_from_shrink32_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    andl $-447369324, %eax # imm = 0xE555AF94
+; X64-NEXT:    shlq $5, %rax
+; X64-NEXT:    retq
+  %and = and i64 %x, 3847597972
+  %shl = shl i64 %and, 5
+  ret i64 %shl
+}
+
+define i64 @and_shr_to_shrink32_i64(i64 %x) nounwind {
+; X86-LABEL: and_shr_to_shrink32_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl $8192, %eax # imm = 0x2000
+; X86-NEXT:    andl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shll $16, %eax
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shr_to_shrink32_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    shrq $16, %rax
+; X64-NEXT:    andl $536870912, %eax # imm = 0x20000000
+; X64-NEXT:    retq
+  %and = and i64 %x, 35184372088832
+  %shr = lshr i64 %and, 16
+  ret i64 %shr
+}
+
+define i64 @shl_and_to_shrink32_i64(i64 %x) nounwind {
+; X86-LABEL: shl_and_to_shrink32_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl %eax, %edx
+; X86-NEXT:    shrl $27, %edx
+; X86-NEXT:    shll $5, %eax
+; X86-NEXT:    andl $-1430916480, %eax # imm = 0xAAB5F280
+; X86-NEXT:    andl $-4, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: shl_and_to_shrink32_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    andl $-447369324, %eax # imm = 0xE555AF94
+; X64-NEXT:    shlq $5, %rax
+; X64-NEXT:    retq
+  %shl = shl i64 %x, 5
+  %and = and i64 %shl, 123123135124
+  ret i64 %and
+}
+
+define i64 @shr_and_fail0_i64(i64 %x) nounwind {
+; X86-LABEL: shr_and_fail0_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shrl $6, %eax
+; X86-NEXT:    andl $240, %eax
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: shr_and_fail0_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    shrq $6, %rax
+; X64-NEXT:    andl $240, %eax
+; X64-NEXT:    retq
+  %shr = lshr i64 %x, 6
+  %and = and i64 %shr, 240
+  ret i64 %and
+}
+
+define i32 @shr_and_fail1_i32(i32 %x) nounwind {
+; X86-LABEL: shr_and_fail1_i32:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shrl $4, %eax
+; X86-NEXT:    andl $112, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: shr_and_fail1_i32:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    shrl $4, %eax
+; X64-NEXT:    andl $112, %eax
+; X64-NEXT:    retq
+  %shr = lshr i32 %x, 4
+  %and = and i32 %shr, 112
+  ret i32 %and
+}
+
+define i64 @shr_and_fail2_i64(i64 %x) nounwind {
+; X86-LABEL: shr_and_fail2_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shrl $5, %eax
+; X86-NEXT:    andl $1231231, %eax # imm = 0x12C97F
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: shr_and_fail2_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    shrq $5, %rax
+; X64-NEXT:    andl $1231231, %eax # imm = 0x12C97F
+; X64-NEXT:    retq
+  %shr = lshr i64 %x, 5
+  %and = and i64 %shr, 1231231
+  ret i64 %and
+}
+
+define i32 @shr_and_fail3_i32(i32 %x) nounwind {
+; X86-LABEL: shr_and_fail3_i32:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shrl $7, %eax
+; X86-NEXT:    andl $91238, %eax # imm = 0x16466
+; X86-NEXT:    retl
+;
+; X64-LABEL: shr_and_fail3_i32:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    shrl $7, %eax
+; X64-NEXT:    andl $91238, %eax # imm = 0x16466
+; X64-NEXT:    retq
+  %shr = lshr i32 %x, 7
+  %and = and i32 %shr, 91238
+  ret i32 %and
+}
+
+define i64 @and_shl_fail0_i64(i64 %x) nounwind {
+; X86-LABEL: and_shl_fail0_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    andl $1, %eax
+; X86-NEXT:    shll $5, %eax
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shl_fail0_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    andl $1, %eax
+; X64-NEXT:    shlq $5, %rax
+; X64-NEXT:    retq
+  %and = and i64 %x, 1
+  %shl = shl i64 %and, 5
+  ret i64 %shl
+}
+
+define i32 @and_shl_fail1_i32(i32 %x) nounwind {
+; X86-LABEL: and_shl_fail1_i32:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    andl $111, %eax
+; X86-NEXT:    shll $5, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shl_fail1_i32:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    andl $111, %eax
+; X64-NEXT:    shll $5, %eax
+; X64-NEXT:    retq
+  %and = and i32 %x, 111
+  %shl = shl i32 %and, 5
+  ret i32 %shl
+}
+
+define i64 @and_shl_fail2_i64(i64 %x) nounwind {
+; X86-LABEL: and_shl_fail2_i64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl $242641, %eax # imm = 0x3B3D1
+; X86-NEXT:    andl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shll $5, %eax
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shl_fail2_i64:
+; X64:       # %bb.0:
+; X64-NEXT:    movq %rdi, %rax
+; X64-NEXT:    andl $242641, %eax # imm = 0x3B3D1
+; X64-NEXT:    shlq $5, %rax
+; X64-NEXT:    retq
+  %and = and i64 %x, 242641
+  %shl = shl i64 %and, 5
+  ret i64 %shl
+}
+
+define i32 @and_shl_fail3_i32(i32 %x) nounwind {
+; X86-LABEL: and_shl_fail3_i32:
+; X86:       # %bb.0:
+; X86-NEXT:    movl $2423211, %eax # imm = 0x24F9AB
+; X86-NEXT:    andl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    shll $5, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: and_shl_fail3_i32:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %edi, %eax
+; X64-NEXT:    andl $2423211, %eax # imm = 0x24F9AB
+; X64-NEXT:    shll $5, %eax
+; X64-NEXT:    retq
+  %and = and i32 %x, 2423211
+  %shl = shl i32 %and, 5
+  ret i32 %shl
+}