8bit_cmov_of_trunc_promotion.ll
12.3 KB
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i386-unknown-unknown -mattr=-cmov | FileCheck %s --check-prefixes=ALL,I386,I386-NOCMOV
; RUN: llc < %s -mtriple=i386-unknown-unknown -mattr=+cmov | FileCheck %s --check-prefixes=ALL,I386,I386-CMOV
; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=-cmov | FileCheck %s --check-prefixes=ALL,I686,I686-NOCMOV
; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+cmov | FileCheck %s --check-prefixes=ALL,I686,I686-CMOV
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=-cmov | FileCheck %s --check-prefixes=ALL,X86_64,X86_64-NOCMOV
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+cmov | FileCheck %s --check-prefixes=ALL,X86_64,X86_64-CMOV
; Values don't come from regs. All good.
define i8 @t0(i32 %a1_wide_orig, i32 %a2_wide_orig, i32 %inc) nounwind {
; I386-NOCMOV-LABEL: t0:
; I386-NOCMOV: # %bb.0:
; I386-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I386-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I386-NOCMOV-NEXT: addl %ecx, %eax
; I386-NOCMOV-NEXT: addl {{[0-9]+}}(%esp), %ecx
; I386-NOCMOV-NEXT: cmpb %cl, %al
; I386-NOCMOV-NEXT: jge .LBB0_2
; I386-NOCMOV-NEXT: # %bb.1:
; I386-NOCMOV-NEXT: movl %ecx, %eax
; I386-NOCMOV-NEXT: .LBB0_2:
; I386-NOCMOV-NEXT: # kill: def $al killed $al killed $eax
; I386-NOCMOV-NEXT: retl
;
; I386-CMOV-LABEL: t0:
; I386-CMOV: # %bb.0:
; I386-CMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I386-CMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I386-CMOV-NEXT: addl %eax, %ecx
; I386-CMOV-NEXT: addl {{[0-9]+}}(%esp), %eax
; I386-CMOV-NEXT: cmpb %al, %cl
; I386-CMOV-NEXT: cmovgel %ecx, %eax
; I386-CMOV-NEXT: # kill: def $al killed $al killed $eax
; I386-CMOV-NEXT: retl
;
; I686-NOCMOV-LABEL: t0:
; I686-NOCMOV: # %bb.0:
; I686-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I686-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I686-NOCMOV-NEXT: addl %ecx, %eax
; I686-NOCMOV-NEXT: addl {{[0-9]+}}(%esp), %ecx
; I686-NOCMOV-NEXT: cmpb %cl, %al
; I686-NOCMOV-NEXT: jge .LBB0_2
; I686-NOCMOV-NEXT: # %bb.1:
; I686-NOCMOV-NEXT: movl %ecx, %eax
; I686-NOCMOV-NEXT: .LBB0_2:
; I686-NOCMOV-NEXT: # kill: def $al killed $al killed $eax
; I686-NOCMOV-NEXT: retl
;
; I686-CMOV-LABEL: t0:
; I686-CMOV: # %bb.0:
; I686-CMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I686-CMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I686-CMOV-NEXT: addl %eax, %ecx
; I686-CMOV-NEXT: addl {{[0-9]+}}(%esp), %eax
; I686-CMOV-NEXT: cmpb %al, %cl
; I686-CMOV-NEXT: cmovgel %ecx, %eax
; I686-CMOV-NEXT: # kill: def $al killed $al killed $eax
; I686-CMOV-NEXT: retl
;
; X86_64-LABEL: t0:
; X86_64: # %bb.0:
; X86_64-NEXT: movl %esi, %eax
; X86_64-NEXT: addl %edx, %edi
; X86_64-NEXT: addl %edx, %eax
; X86_64-NEXT: cmpb %al, %dil
; X86_64-NEXT: cmovgel %edi, %eax
; X86_64-NEXT: # kill: def $al killed $al killed $eax
; X86_64-NEXT: retq
%a1_wide = add i32 %a1_wide_orig, %inc
%a2_wide = add i32 %a2_wide_orig, %inc
%a1 = trunc i32 %a1_wide to i8
%a2 = trunc i32 %a2_wide to i8
%t1 = icmp sgt i8 %a1, %a2
%t2 = select i1 %t1, i8 %a1, i8 %a2
ret i8 %t2
}
; Values don't come from regs, but there is only one truncation.
define i8 @neg_only_one_truncation(i32 %a1_wide_orig, i8 %a2_orig, i32 %inc) nounwind {
; I386-NOCMOV-LABEL: neg_only_one_truncation:
; I386-NOCMOV: # %bb.0:
; I386-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I386-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I386-NOCMOV-NEXT: addl %ecx, %eax
; I386-NOCMOV-NEXT: addb {{[0-9]+}}(%esp), %cl
; I386-NOCMOV-NEXT: cmpb %cl, %al
; I386-NOCMOV-NEXT: jge .LBB1_2
; I386-NOCMOV-NEXT: # %bb.1:
; I386-NOCMOV-NEXT: movl %ecx, %eax
; I386-NOCMOV-NEXT: .LBB1_2:
; I386-NOCMOV-NEXT: # kill: def $al killed $al killed $eax
; I386-NOCMOV-NEXT: retl
;
; I386-CMOV-LABEL: neg_only_one_truncation:
; I386-CMOV: # %bb.0:
; I386-CMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I386-CMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I386-CMOV-NEXT: addl %eax, %ecx
; I386-CMOV-NEXT: addb {{[0-9]+}}(%esp), %al
; I386-CMOV-NEXT: cmpb %al, %cl
; I386-CMOV-NEXT: movzbl %al, %eax
; I386-CMOV-NEXT: cmovgel %ecx, %eax
; I386-CMOV-NEXT: # kill: def $al killed $al killed $eax
; I386-CMOV-NEXT: retl
;
; I686-NOCMOV-LABEL: neg_only_one_truncation:
; I686-NOCMOV: # %bb.0:
; I686-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I686-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I686-NOCMOV-NEXT: addl %ecx, %eax
; I686-NOCMOV-NEXT: addb {{[0-9]+}}(%esp), %cl
; I686-NOCMOV-NEXT: cmpb %cl, %al
; I686-NOCMOV-NEXT: jge .LBB1_2
; I686-NOCMOV-NEXT: # %bb.1:
; I686-NOCMOV-NEXT: movl %ecx, %eax
; I686-NOCMOV-NEXT: .LBB1_2:
; I686-NOCMOV-NEXT: # kill: def $al killed $al killed $eax
; I686-NOCMOV-NEXT: retl
;
; I686-CMOV-LABEL: neg_only_one_truncation:
; I686-CMOV: # %bb.0:
; I686-CMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I686-CMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I686-CMOV-NEXT: addl %eax, %ecx
; I686-CMOV-NEXT: addb {{[0-9]+}}(%esp), %al
; I686-CMOV-NEXT: cmpb %al, %cl
; I686-CMOV-NEXT: movzbl %al, %eax
; I686-CMOV-NEXT: cmovgel %ecx, %eax
; I686-CMOV-NEXT: # kill: def $al killed $al killed $eax
; I686-CMOV-NEXT: retl
;
; X86_64-LABEL: neg_only_one_truncation:
; X86_64: # %bb.0:
; X86_64-NEXT: addl %edx, %edi
; X86_64-NEXT: addb %sil, %dl
; X86_64-NEXT: cmpb %dl, %dil
; X86_64-NEXT: movzbl %dl, %eax
; X86_64-NEXT: cmovgel %edi, %eax
; X86_64-NEXT: # kill: def $al killed $al killed $eax
; X86_64-NEXT: retq
%a1_wide = add i32 %a1_wide_orig, %inc
%inc_short = trunc i32 %inc to i8
%a2 = add i8 %a2_orig, %inc_short
%a1 = trunc i32 %a1_wide to i8
%t1 = icmp sgt i8 %a1, %a2
%t2 = select i1 %t1, i8 %a1, i8 %a2
ret i8 %t2
}
; Values don't come from regs, but truncation from different types.
define i8 @neg_type_mismatch(i32 %a1_wide_orig, i16 %a2_wide_orig, i32 %inc) nounwind {
; I386-NOCMOV-LABEL: neg_type_mismatch:
; I386-NOCMOV: # %bb.0:
; I386-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I386-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I386-NOCMOV-NEXT: addl %ecx, %eax
; I386-NOCMOV-NEXT: addw {{[0-9]+}}(%esp), %cx
; I386-NOCMOV-NEXT: cmpb %cl, %al
; I386-NOCMOV-NEXT: jge .LBB2_2
; I386-NOCMOV-NEXT: # %bb.1:
; I386-NOCMOV-NEXT: movl %ecx, %eax
; I386-NOCMOV-NEXT: .LBB2_2:
; I386-NOCMOV-NEXT: # kill: def $al killed $al killed $eax
; I386-NOCMOV-NEXT: retl
;
; I386-CMOV-LABEL: neg_type_mismatch:
; I386-CMOV: # %bb.0:
; I386-CMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I386-CMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I386-CMOV-NEXT: addl %eax, %ecx
; I386-CMOV-NEXT: addw {{[0-9]+}}(%esp), %ax
; I386-CMOV-NEXT: cmpb %al, %cl
; I386-CMOV-NEXT: cmovgel %ecx, %eax
; I386-CMOV-NEXT: # kill: def $al killed $al killed $eax
; I386-CMOV-NEXT: retl
;
; I686-NOCMOV-LABEL: neg_type_mismatch:
; I686-NOCMOV: # %bb.0:
; I686-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I686-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I686-NOCMOV-NEXT: addl %ecx, %eax
; I686-NOCMOV-NEXT: addw {{[0-9]+}}(%esp), %cx
; I686-NOCMOV-NEXT: cmpb %cl, %al
; I686-NOCMOV-NEXT: jge .LBB2_2
; I686-NOCMOV-NEXT: # %bb.1:
; I686-NOCMOV-NEXT: movl %ecx, %eax
; I686-NOCMOV-NEXT: .LBB2_2:
; I686-NOCMOV-NEXT: # kill: def $al killed $al killed $eax
; I686-NOCMOV-NEXT: retl
;
; I686-CMOV-LABEL: neg_type_mismatch:
; I686-CMOV: # %bb.0:
; I686-CMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I686-CMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I686-CMOV-NEXT: addl %eax, %ecx
; I686-CMOV-NEXT: addw {{[0-9]+}}(%esp), %ax
; I686-CMOV-NEXT: cmpb %al, %cl
; I686-CMOV-NEXT: cmovgel %ecx, %eax
; I686-CMOV-NEXT: # kill: def $al killed $al killed $eax
; I686-CMOV-NEXT: retl
;
; X86_64-LABEL: neg_type_mismatch:
; X86_64: # %bb.0:
; X86_64-NEXT: movl %esi, %eax
; X86_64-NEXT: addl %edx, %edi
; X86_64-NEXT: addl %edx, %eax
; X86_64-NEXT: cmpb %al, %dil
; X86_64-NEXT: cmovgel %edi, %eax
; X86_64-NEXT: # kill: def $al killed $al killed $eax
; X86_64-NEXT: retq
%a1_wide = add i32 %a1_wide_orig, %inc
%inc_short = trunc i32 %inc to i16
%a2_wide = add i16 %a2_wide_orig, %inc_short
%a1 = trunc i32 %a1_wide to i8
%a2 = trunc i16 %a2_wide to i8
%t1 = icmp sgt i8 %a1, %a2
%t2 = select i1 %t1, i8 %a1, i8 %a2
ret i8 %t2
}
; One value come from regs
define i8 @negative_CopyFromReg(i32 %a1_wide, i32 %a2_wide_orig, i32 %inc) nounwind {
; I386-NOCMOV-LABEL: negative_CopyFromReg:
; I386-NOCMOV: # %bb.0:
; I386-NOCMOV-NEXT: movb {{[0-9]+}}(%esp), %al
; I386-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I386-NOCMOV-NEXT: addl {{[0-9]+}}(%esp), %ecx
; I386-NOCMOV-NEXT: cmpb %cl, %al
; I386-NOCMOV-NEXT: jge .LBB3_2
; I386-NOCMOV-NEXT: # %bb.1:
; I386-NOCMOV-NEXT: movl %ecx, %eax
; I386-NOCMOV-NEXT: .LBB3_2:
; I386-NOCMOV-NEXT: retl
;
; I386-CMOV-LABEL: negative_CopyFromReg:
; I386-CMOV: # %bb.0:
; I386-CMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I386-CMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I386-CMOV-NEXT: addl {{[0-9]+}}(%esp), %eax
; I386-CMOV-NEXT: cmpb %al, %cl
; I386-CMOV-NEXT: cmovgel %ecx, %eax
; I386-CMOV-NEXT: # kill: def $al killed $al killed $eax
; I386-CMOV-NEXT: retl
;
; I686-NOCMOV-LABEL: negative_CopyFromReg:
; I686-NOCMOV: # %bb.0:
; I686-NOCMOV-NEXT: movb {{[0-9]+}}(%esp), %al
; I686-NOCMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I686-NOCMOV-NEXT: addl {{[0-9]+}}(%esp), %ecx
; I686-NOCMOV-NEXT: cmpb %cl, %al
; I686-NOCMOV-NEXT: jge .LBB3_2
; I686-NOCMOV-NEXT: # %bb.1:
; I686-NOCMOV-NEXT: movl %ecx, %eax
; I686-NOCMOV-NEXT: .LBB3_2:
; I686-NOCMOV-NEXT: retl
;
; I686-CMOV-LABEL: negative_CopyFromReg:
; I686-CMOV: # %bb.0:
; I686-CMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I686-CMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I686-CMOV-NEXT: addl {{[0-9]+}}(%esp), %eax
; I686-CMOV-NEXT: cmpb %al, %cl
; I686-CMOV-NEXT: cmovgel %ecx, %eax
; I686-CMOV-NEXT: # kill: def $al killed $al killed $eax
; I686-CMOV-NEXT: retl
;
; X86_64-LABEL: negative_CopyFromReg:
; X86_64: # %bb.0:
; X86_64-NEXT: movl %esi, %eax
; X86_64-NEXT: addl %edx, %eax
; X86_64-NEXT: cmpb %al, %dil
; X86_64-NEXT: cmovgel %edi, %eax
; X86_64-NEXT: # kill: def $al killed $al killed $eax
; X86_64-NEXT: retq
%a2_wide = add i32 %a2_wide_orig, %inc
%a1 = trunc i32 %a1_wide to i8
%a2 = trunc i32 %a2_wide to i8
%t1 = icmp sgt i8 %a1, %a2
%t2 = select i1 %t1, i8 %a1, i8 %a2
ret i8 %t2
}
; Both values come from regs
define i8 @negative_CopyFromRegs(i32 %a1_wide, i32 %a2_wide) nounwind {
; I386-NOCMOV-LABEL: negative_CopyFromRegs:
; I386-NOCMOV: # %bb.0:
; I386-NOCMOV-NEXT: movb {{[0-9]+}}(%esp), %cl
; I386-NOCMOV-NEXT: movb {{[0-9]+}}(%esp), %al
; I386-NOCMOV-NEXT: cmpb %cl, %al
; I386-NOCMOV-NEXT: jge .LBB4_2
; I386-NOCMOV-NEXT: # %bb.1:
; I386-NOCMOV-NEXT: movl %ecx, %eax
; I386-NOCMOV-NEXT: .LBB4_2:
; I386-NOCMOV-NEXT: retl
;
; I386-CMOV-LABEL: negative_CopyFromRegs:
; I386-CMOV: # %bb.0:
; I386-CMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I386-CMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I386-CMOV-NEXT: cmpb %al, %cl
; I386-CMOV-NEXT: cmovgel %ecx, %eax
; I386-CMOV-NEXT: # kill: def $al killed $al killed $eax
; I386-CMOV-NEXT: retl
;
; I686-NOCMOV-LABEL: negative_CopyFromRegs:
; I686-NOCMOV: # %bb.0:
; I686-NOCMOV-NEXT: movb {{[0-9]+}}(%esp), %cl
; I686-NOCMOV-NEXT: movb {{[0-9]+}}(%esp), %al
; I686-NOCMOV-NEXT: cmpb %cl, %al
; I686-NOCMOV-NEXT: jge .LBB4_2
; I686-NOCMOV-NEXT: # %bb.1:
; I686-NOCMOV-NEXT: movl %ecx, %eax
; I686-NOCMOV-NEXT: .LBB4_2:
; I686-NOCMOV-NEXT: retl
;
; I686-CMOV-LABEL: negative_CopyFromRegs:
; I686-CMOV: # %bb.0:
; I686-CMOV-NEXT: movl {{[0-9]+}}(%esp), %eax
; I686-CMOV-NEXT: movl {{[0-9]+}}(%esp), %ecx
; I686-CMOV-NEXT: cmpb %al, %cl
; I686-CMOV-NEXT: cmovgel %ecx, %eax
; I686-CMOV-NEXT: # kill: def $al killed $al killed $eax
; I686-CMOV-NEXT: retl
;
; X86_64-LABEL: negative_CopyFromRegs:
; X86_64: # %bb.0:
; X86_64-NEXT: movl %esi, %eax
; X86_64-NEXT: cmpb %al, %dil
; X86_64-NEXT: cmovgel %edi, %eax
; X86_64-NEXT: # kill: def $al killed $al killed $eax
; X86_64-NEXT: retq
%a1 = trunc i32 %a1_wide to i8
%a2 = trunc i32 %a2_wide to i8
%t1 = icmp sgt i8 %a1, %a2
%t2 = select i1 %t1, i8 %a1, i8 %a2
ret i8 %t2
}