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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3
; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefixes=X86
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx | FileCheck %s --check-prefixes=X64
define i32 @sext_known_nonzero(i16 %xx) {
; X86-LABEL: sext_known_nonzero:
; X86: # %bb.0:
; X86-NEXT: movzbl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl $256, %eax # imm = 0x100
; X86-NEXT: shll %cl, %eax
; X86-NEXT: cwtl
; X86-NEXT: bsfl %eax, %ecx
; X86-NEXT: movl $32, %eax
; X86-NEXT: cmovnel %ecx, %eax
; X86-NEXT: retl
;
; X64-LABEL: sext_known_nonzero:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %ecx
; X64-NEXT: movl $256, %eax # imm = 0x100
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: shll %cl, %eax
; X64-NEXT: movswl %ax, %ecx
; X64-NEXT: movl $32, %eax
; X64-NEXT: rep bsfl %ecx, %eax
; X64-NEXT: retq
%x = shl i16 256, %xx
%z = sext i16 %x to i32
%r = call i32 @llvm.cttz.i32(i32 %z, i1 false)
ret i32 %r
}
define i32 @sext_known_nonzero_nuw(i16 %xx) {
; X86-LABEL: sext_known_nonzero_nuw:
; X86: # %bb.0:
; X86-NEXT: movzbl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl $256, %eax # imm = 0x100
; X86-NEXT: shll %cl, %eax
; X86-NEXT: cwtl
; X86-NEXT: rep bsfl %eax, %eax
; X86-NEXT: retl
;
; X64-LABEL: sext_known_nonzero_nuw:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %ecx
; X64-NEXT: movl $256, %eax # imm = 0x100
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: shll %cl, %eax
; X64-NEXT: cwtl
; X64-NEXT: rep bsfl %eax, %eax
; X64-NEXT: retq
%x = shl nuw i16 256, %xx
%z = sext i16 %x to i32
%r = call i32 @llvm.cttz.i32(i32 %z, i1 false)
ret i32 %r
}
define i32 @sext_known_nonzero_nsw(i16 %xx) {
; X86-LABEL: sext_known_nonzero_nsw:
; X86: # %bb.0:
; X86-NEXT: movzbl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl $256, %eax # imm = 0x100
; X86-NEXT: shll %cl, %eax
; X86-NEXT: movzwl %ax, %eax
; X86-NEXT: rep bsfl %eax, %eax
; X86-NEXT: retl
;
; X64-LABEL: sext_known_nonzero_nsw:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %ecx
; X64-NEXT: movl $256, %eax # imm = 0x100
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: shll %cl, %eax
; X64-NEXT: movzwl %ax, %eax
; X64-NEXT: rep bsfl %eax, %eax
; X64-NEXT: retq
%x = shl nsw i16 256, %xx
%z = sext i16 %x to i32
%r = call i32 @llvm.cttz.i32(i32 %z, i1 false)
ret i32 %r
}
define i32 @sext_known_nonzero_nuw_nsw(i16 %xx) {
; X86-LABEL: sext_known_nonzero_nuw_nsw:
; X86: # %bb.0:
; X86-NEXT: movzbl {{[0-9]+}}(%esp), %ecx
; X86-NEXT: movl $256, %eax # imm = 0x100
; X86-NEXT: shll %cl, %eax
; X86-NEXT: movzwl %ax, %eax
; X86-NEXT: rep bsfl %eax, %eax
; X86-NEXT: retl
;
; X64-LABEL: sext_known_nonzero_nuw_nsw:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %ecx
; X64-NEXT: movl $256, %eax # imm = 0x100
; X64-NEXT: # kill: def $cl killed $cl killed $ecx
; X64-NEXT: shll %cl, %eax
; X64-NEXT: movzwl %ax, %eax
; X64-NEXT: rep bsfl %eax, %eax
; X64-NEXT: retq
%x = shl nuw nsw i16 256, %xx
%z = sext i16 %x to i32
%r = call i32 @llvm.cttz.i32(i32 %z, i1 false)
ret i32 %r
}
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