| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s |
| |
| ; PR33879 - use shift eflags result when it won't cause stalls |
| |
| ; ashr by constant - use sarl eflags result |
| define i32 @ashr_const(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: ashr_const: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edx, %eax |
| ; CHECK-NEXT: sarl $14, %edi |
| ; CHECK-NEXT: cmovnel %ecx, %eax |
| ; CHECK-NEXT: retq |
| %s = ashr i32 %a0, 14 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; lshr by constant - simplify to test |
| define i32 @lshr_const(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: lshr_const: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edx, %eax |
| ; CHECK-NEXT: testl $-16384, %edi # imm = 0xC000 |
| ; CHECK-NEXT: cmovnel %ecx, %eax |
| ; CHECK-NEXT: retq |
| %s = lshr i32 %a0, 14 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; shl by constant - simplify to test |
| define i32 @shl_const(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: shl_const: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edx, %eax |
| ; CHECK-NEXT: testl $262143, %edi # imm = 0x3FFFF |
| ; CHECK-NEXT: cmovnel %ecx, %eax |
| ; CHECK-NEXT: retq |
| %s = shl i32 %a0, 14 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; ashr by constant and using shift result - use sarl eflags result |
| define i32 @ashr_const_self_select(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: ashr_const_self_select: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: sarl $14, %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = ashr i32 %a0, 14 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |
| |
| ; lshr by constant and using shift result - use shrl eflags result |
| define i32 @lshr_const_self_select(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: lshr_const_self_select: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: shrl $14, %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = lshr i32 %a0, 14 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |
| |
| ; lshr by constant and using result - use shll eflags result |
| define i32 @shl_const_self_select(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: shl_const_self_select: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: shll $14, %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = shl i32 %a0, 14 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |
| |
| ; ashr by 1 - use sarl eflags result |
| define i32 @ashr_const1(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: ashr_const1: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edx, %eax |
| ; CHECK-NEXT: sarl %edi |
| ; CHECK-NEXT: cmovnel %ecx, %eax |
| ; CHECK-NEXT: retq |
| %s = ashr i32 %a0, 1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; lshr by 1 - simplify to test |
| define i32 @lshr_const1(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: lshr_const1: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edx, %eax |
| ; CHECK-NEXT: testl $-2, %edi |
| ; CHECK-NEXT: cmovnel %ecx, %eax |
| ; CHECK-NEXT: retq |
| %s = lshr i32 %a0, 1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; shl by 1 - simplify to test |
| define i32 @shl_const1(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: shl_const1: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edx, %eax |
| ; CHECK-NEXT: testl $2147483647, %edi # imm = 0x7FFFFFFF |
| ; CHECK-NEXT: cmovnel %ecx, %eax |
| ; CHECK-NEXT: retq |
| %s = shl i32 %a0, 1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; ashr by 1 and using shift result - use sarl eflags result |
| define i32 @ashr_const1_self_select(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: ashr_const1_self_select: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: sarl %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = ashr i32 %a0, 1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |
| |
| ; lshr by 1 and using shift result - use shrl eflags result |
| define i32 @lshr_const1_self_select(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: lshr_const1_self_select: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: shrl %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = lshr i32 %a0, 1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |
| |
| ; lshr by 1 and using result - use addl eflags result |
| define i32 @shl_const1_self_select(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: shl_const1_self_select: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: addl %edi, %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = shl i32 %a0, 1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |
| |
| ; ashr by variable - use seperate test |
| define i32 @ashr_var(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: ashr_var: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %ecx, %eax |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: sarl %cl, %edi |
| ; CHECK-NEXT: testl %edi, %edi |
| ; CHECK-NEXT: cmovel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = ashr i32 %a0, %a1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; lshr by variable - use seperate test |
| define i32 @lshr_var(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: lshr_var: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %ecx, %eax |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: shrl %cl, %edi |
| ; CHECK-NEXT: testl %edi, %edi |
| ; CHECK-NEXT: cmovel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = lshr i32 %a0, %a1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; shl by variable - use seperate test |
| define i32 @shl_var(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: shl_var: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %ecx, %eax |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: shll %cl, %edi |
| ; CHECK-NEXT: testl %edi, %edi |
| ; CHECK-NEXT: cmovel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = shl i32 %a0, %a1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; ashr by variable and using result - use seperate test |
| define i32 @ashr_var_self_select(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: ashr_var_self_select: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: sarl %cl, %eax |
| ; CHECK-NEXT: testl %eax, %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = ashr i32 %a0, %a1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |
| |
| ; lshr by variable and using result - use seperate test |
| define i32 @lshr_var_self_select(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: lshr_var_self_select: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: shrl %cl, %eax |
| ; CHECK-NEXT: testl %eax, %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = lshr i32 %a0, %a1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |
| |
| ; shl by variable and using result - use seperate test |
| define i32 @shl_var_self_select(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: shl_var_self_select: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: shll %cl, %eax |
| ; CHECK-NEXT: testl %eax, %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %s = shl i32 %a0, %a1 |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |
| |
| ; ashr by non-zero variable - use seperate test |
| define i32 @ashr_var_amt_never_zero(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: ashr_var_amt_never_zero: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %ecx, %eax |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: orb $1, %cl |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: sarl %cl, %edi |
| ; CHECK-NEXT: testl %edi, %edi |
| ; CHECK-NEXT: cmovel %edx, %eax |
| ; CHECK-NEXT: retq |
| %a = or i32 %a1, 1 |
| %s = ashr i32 %a0, %a |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; lshr by non-zero variable - use seperate test |
| define i32 @lshr_var_amt_never_zero(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: lshr_var_amt_never_zero: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %ecx, %eax |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: orb $1, %cl |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: shrl %cl, %edi |
| ; CHECK-NEXT: testl %edi, %edi |
| ; CHECK-NEXT: cmovel %edx, %eax |
| ; CHECK-NEXT: retq |
| %a = or i32 %a1, 1 |
| %s = lshr i32 %a0, %a |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; shl by non-zero variable - use seperate test |
| define i32 @shl_var_amt_never_zero(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: shl_var_amt_never_zero: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %ecx, %eax |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: orb $1, %cl |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: shll %cl, %edi |
| ; CHECK-NEXT: testl %edi, %edi |
| ; CHECK-NEXT: cmovel %edx, %eax |
| ; CHECK-NEXT: retq |
| %a = or i32 %a1, 1 |
| %s = shl i32 %a0, %a |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %a2, i32 %a3 |
| ret i32 %r |
| } |
| |
| ; ashr by non-zero variable and using result - use seperate test |
| define i32 @ashr_var_self_select_amt_never_zero(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: ashr_var_self_select_amt_never_zero: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: orb $1, %cl |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: shrl %cl, %eax |
| ; CHECK-NEXT: testl %eax, %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %a = or i32 %a1, 1 |
| %s = lshr i32 %a0, %a |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |
| |
| ; lshr by non-zero variable and using result - use seperate test |
| define i32 @lshr_var_self_select_amt_never_zero(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: lshr_var_self_select_amt_never_zero: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: orb $1, %cl |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: shrl %cl, %eax |
| ; CHECK-NEXT: testl %eax, %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %a = or i32 %a1, 1 |
| %s = lshr i32 %a0, %a |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |
| |
| ; shl by non-zero variable and using result - use seperate test |
| define i32 @shl_var_self_select_amt_never_zero(i32 %a0, i32 %a1, i32 %a2, i32 %a3) { |
| ; CHECK-LABEL: shl_var_self_select_amt_never_zero: |
| ; CHECK: # %bb.0: |
| ; CHECK-NEXT: movl %esi, %ecx |
| ; CHECK-NEXT: movl %edi, %eax |
| ; CHECK-NEXT: orb $1, %cl |
| ; CHECK-NEXT: # kill: def $cl killed $cl killed $ecx |
| ; CHECK-NEXT: shrl %cl, %eax |
| ; CHECK-NEXT: testl %eax, %eax |
| ; CHECK-NEXT: cmovnel %edx, %eax |
| ; CHECK-NEXT: retq |
| %a = or i32 %a1, 1 |
| %s = lshr i32 %a0, %a |
| %c = icmp eq i32 %s, 0 |
| %r = select i1 %c, i32 %s, i32 %a2 |
| ret i32 %r |
| } |