diff options
Diffstat (limited to 'test/CodeGen/X86/select_const.ll')
| -rw-r--r-- | test/CodeGen/X86/select_const.ll | 275 |
1 files changed, 178 insertions, 97 deletions
diff --git a/test/CodeGen/X86/select_const.ll b/test/CodeGen/X86/select_const.ll index 0eb9bf46ffd15..d78f94db71abc 100644 --- a/test/CodeGen/X86/select_const.ll +++ b/test/CodeGen/X86/select_const.ll @@ -8,7 +8,7 @@ define i32 @select_0_or_1(i1 %cond) { ; CHECK-LABEL: select_0_or_1: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: notb %dil ; CHECK-NEXT: movzbl %dil, %eax ; CHECK-NEXT: andl $1, %eax @@ -19,7 +19,7 @@ define i32 @select_0_or_1(i1 %cond) { define i32 @select_0_or_1_zeroext(i1 zeroext %cond) { ; CHECK-LABEL: select_0_or_1_zeroext: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: xorb $1, %dil ; CHECK-NEXT: movzbl %dil, %eax ; CHECK-NEXT: retq @@ -29,7 +29,7 @@ define i32 @select_0_or_1_zeroext(i1 zeroext %cond) { define i32 @select_0_or_1_signext(i1 signext %cond) { ; CHECK-LABEL: select_0_or_1_signext: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: notb %dil ; CHECK-NEXT: movzbl %dil, %eax ; CHECK-NEXT: andl $1, %eax @@ -42,7 +42,7 @@ define i32 @select_0_or_1_signext(i1 signext %cond) { define i32 @select_1_or_0(i1 %cond) { ; CHECK-LABEL: select_1_or_0: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: andl $1, %edi ; CHECK-NEXT: movl %edi, %eax ; CHECK-NEXT: retq @@ -52,8 +52,8 @@ define i32 @select_1_or_0(i1 %cond) { define i32 @select_1_or_0_zeroext(i1 zeroext %cond) { ; CHECK-LABEL: select_1_or_0_zeroext: -; CHECK: # BB#0: -; CHECK-NEXT: movzbl %dil, %eax +; CHECK: # %bb.0: +; CHECK-NEXT: movl %edi, %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 1, i32 0 ret i32 %sel @@ -61,9 +61,9 @@ define i32 @select_1_or_0_zeroext(i1 zeroext %cond) { define i32 @select_1_or_0_signext(i1 signext %cond) { ; CHECK-LABEL: select_1_or_0_signext: -; CHECK: # BB#0: -; CHECK-NEXT: andb $1, %dil -; CHECK-NEXT: movzbl %dil, %eax +; CHECK: # %bb.0: +; CHECK-NEXT: andl $1, %edi +; CHECK-NEXT: movl %edi, %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 1, i32 0 ret i32 %sel @@ -73,8 +73,8 @@ define i32 @select_1_or_0_signext(i1 signext %cond) { define i32 @select_0_or_neg1(i1 %cond) { ; CHECK-LABEL: select_0_or_neg1: -; CHECK: # BB#0: -; CHECK-NEXT: # kill: %EDI<def> %EDI<kill> %RDI<def> +; CHECK: # %bb.0: +; CHECK-NEXT: # kill: def %edi killed %edi def %rdi ; CHECK-NEXT: andl $1, %edi ; CHECK-NEXT: leal -1(%rdi), %eax ; CHECK-NEXT: retq @@ -84,9 +84,9 @@ define i32 @select_0_or_neg1(i1 %cond) { define i32 @select_0_or_neg1_zeroext(i1 zeroext %cond) { ; CHECK-LABEL: select_0_or_neg1_zeroext: -; CHECK: # BB#0: -; CHECK-NEXT: movzbl %dil, %eax -; CHECK-NEXT: decl %eax +; CHECK: # %bb.0: +; CHECK-NEXT: # kill: def %edi killed %edi def %rdi +; CHECK-NEXT: leal -1(%rdi), %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 0, i32 -1 ret i32 %sel @@ -94,10 +94,9 @@ define i32 @select_0_or_neg1_zeroext(i1 zeroext %cond) { define i32 @select_0_or_neg1_signext(i1 signext %cond) { ; CHECK-LABEL: select_0_or_neg1_signext: -; CHECK: # BB#0: -; CHECK-NEXT: andb $1, %dil -; CHECK-NEXT: movzbl %dil, %eax -; CHECK-NEXT: decl %eax +; CHECK: # %bb.0: +; CHECK-NEXT: notl %edi +; CHECK-NEXT: movl %edi, %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 0, i32 -1 ret i32 %sel @@ -107,7 +106,7 @@ define i32 @select_0_or_neg1_signext(i1 signext %cond) { define i32 @select_neg1_or_0(i1 %cond) { ; CHECK-LABEL: select_neg1_or_0: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: andl $1, %edi ; CHECK-NEXT: negl %edi ; CHECK-NEXT: movl %edi, %eax @@ -118,9 +117,9 @@ define i32 @select_neg1_or_0(i1 %cond) { define i32 @select_neg1_or_0_zeroext(i1 zeroext %cond) { ; CHECK-LABEL: select_neg1_or_0_zeroext: -; CHECK: # BB#0: -; CHECK-NEXT: movzbl %dil, %eax -; CHECK-NEXT: negl %eax +; CHECK: # %bb.0: +; CHECK-NEXT: negl %edi +; CHECK-NEXT: movl %edi, %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 -1, i32 0 ret i32 %sel @@ -128,8 +127,8 @@ define i32 @select_neg1_or_0_zeroext(i1 zeroext %cond) { define i32 @select_neg1_or_0_signext(i1 signext %cond) { ; CHECK-LABEL: select_neg1_or_0_signext: -; CHECK: # BB#0: -; CHECK-NEXT: movsbl %dil, %eax +; CHECK: # %bb.0: +; CHECK-NEXT: movl %edi, %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 -1, i32 0 ret i32 %sel @@ -139,8 +138,8 @@ define i32 @select_neg1_or_0_signext(i1 signext %cond) { define i32 @select_Cplus1_C(i1 %cond) { ; CHECK-LABEL: select_Cplus1_C: -; CHECK: # BB#0: -; CHECK-NEXT: # kill: %EDI<def> %EDI<kill> %RDI<def> +; CHECK: # %bb.0: +; CHECK-NEXT: # kill: def %edi killed %edi def %rdi ; CHECK-NEXT: andl $1, %edi ; CHECK-NEXT: leal 41(%rdi), %eax ; CHECK-NEXT: retq @@ -150,9 +149,9 @@ define i32 @select_Cplus1_C(i1 %cond) { define i32 @select_Cplus1_C_zeroext(i1 zeroext %cond) { ; CHECK-LABEL: select_Cplus1_C_zeroext: -; CHECK: # BB#0: -; CHECK-NEXT: movzbl %dil, %eax -; CHECK-NEXT: addl $41, %eax +; CHECK: # %bb.0: +; CHECK-NEXT: # kill: def %edi killed %edi def %rdi +; CHECK-NEXT: leal 41(%rdi), %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 42, i32 41 ret i32 %sel @@ -160,10 +159,9 @@ define i32 @select_Cplus1_C_zeroext(i1 zeroext %cond) { define i32 @select_Cplus1_C_signext(i1 signext %cond) { ; CHECK-LABEL: select_Cplus1_C_signext: -; CHECK: # BB#0: -; CHECK-NEXT: andb $1, %dil -; CHECK-NEXT: movzbl %dil, %eax -; CHECK-NEXT: addl $41, %eax +; CHECK: # %bb.0: +; CHECK-NEXT: movl $41, %eax +; CHECK-NEXT: subl %edi, %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 42, i32 41 ret i32 %sel @@ -173,7 +171,7 @@ define i32 @select_Cplus1_C_signext(i1 signext %cond) { define i32 @select_C_Cplus1(i1 %cond) { ; CHECK-LABEL: select_C_Cplus1: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: andl $1, %edi ; CHECK-NEXT: movl $42, %eax ; CHECK-NEXT: subl %edi, %eax @@ -184,10 +182,9 @@ define i32 @select_C_Cplus1(i1 %cond) { define i32 @select_C_Cplus1_zeroext(i1 zeroext %cond) { ; CHECK-LABEL: select_C_Cplus1_zeroext: -; CHECK: # BB#0: -; CHECK-NEXT: movzbl %dil, %ecx +; CHECK: # %bb.0: ; CHECK-NEXT: movl $42, %eax -; CHECK-NEXT: subl %ecx, %eax +; CHECK-NEXT: subl %edi, %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 41, i32 42 ret i32 %sel @@ -195,11 +192,10 @@ define i32 @select_C_Cplus1_zeroext(i1 zeroext %cond) { define i32 @select_C_Cplus1_signext(i1 signext %cond) { ; CHECK-LABEL: select_C_Cplus1_signext: -; CHECK: # BB#0: -; CHECK-NEXT: andb $1, %dil -; CHECK-NEXT: movzbl %dil, %ecx +; CHECK: # %bb.0: +; CHECK-NEXT: andl $1, %edi ; CHECK-NEXT: movl $42, %eax -; CHECK-NEXT: subl %ecx, %eax +; CHECK-NEXT: subl %edi, %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 41, i32 42 ret i32 %sel @@ -210,11 +206,10 @@ define i32 @select_C_Cplus1_signext(i1 signext %cond) { define i32 @select_lea_2(i1 zeroext %cond) { ; CHECK-LABEL: select_lea_2: -; CHECK: # BB#0: -; CHECK-NEXT: testb %dil, %dil -; CHECK-NEXT: movl $-1, %ecx -; CHECK-NEXT: movl $1, %eax -; CHECK-NEXT: cmovnel %ecx, %eax +; CHECK: # %bb.0: +; CHECK-NEXT: xorb $1, %dil +; CHECK-NEXT: movzbl %dil, %eax +; CHECK-NEXT: leal -1(%rax,%rax), %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 -1, i32 1 ret i32 %sel @@ -222,11 +217,10 @@ define i32 @select_lea_2(i1 zeroext %cond) { define i64 @select_lea_3(i1 zeroext %cond) { ; CHECK-LABEL: select_lea_3: -; CHECK: # BB#0: -; CHECK-NEXT: testb %dil, %dil -; CHECK-NEXT: movl $1, %ecx -; CHECK-NEXT: movq $-2, %rax -; CHECK-NEXT: cmoveq %rcx, %rax +; CHECK: # %bb.0: +; CHECK-NEXT: xorb $1, %dil +; CHECK-NEXT: movzbl %dil, %eax +; CHECK-NEXT: leaq -2(%rax,%rax,2), %rax ; CHECK-NEXT: retq %sel = select i1 %cond, i64 -2, i64 1 ret i64 %sel @@ -234,11 +228,10 @@ define i64 @select_lea_3(i1 zeroext %cond) { define i32 @select_lea_5(i1 zeroext %cond) { ; CHECK-LABEL: select_lea_5: -; CHECK: # BB#0: -; CHECK-NEXT: testb %dil, %dil -; CHECK-NEXT: movl $-2, %ecx -; CHECK-NEXT: movl $3, %eax -; CHECK-NEXT: cmovnel %ecx, %eax +; CHECK: # %bb.0: +; CHECK-NEXT: xorb $1, %dil +; CHECK-NEXT: movzbl %dil, %eax +; CHECK-NEXT: leal -2(%rax,%rax,4), %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 -2, i32 3 ret i32 %sel @@ -246,29 +239,99 @@ define i32 @select_lea_5(i1 zeroext %cond) { define i64 @select_lea_9(i1 zeroext %cond) { ; CHECK-LABEL: select_lea_9: -; CHECK: # BB#0: -; CHECK-NEXT: testb %dil, %dil -; CHECK-NEXT: movl $2, %ecx -; CHECK-NEXT: movq $-7, %rax -; CHECK-NEXT: cmoveq %rcx, %rax +; CHECK: # %bb.0: +; CHECK-NEXT: xorb $1, %dil +; CHECK-NEXT: movzbl %dil, %eax +; CHECK-NEXT: leaq -7(%rax,%rax,8), %rax ; CHECK-NEXT: retq %sel = select i1 %cond, i64 -7, i64 2 ret i64 %sel } +; Should this be 'sbb x,x' or 'sbb 0,x' with simpler LEA or add? + +define i64 @sel_1_2(i64 %x, i64 %y) { +; CHECK-LABEL: sel_1_2: +; CHECK: # %bb.0: +; CHECK-NEXT: cmpq $42, %rdi +; CHECK-NEXT: sbbq $0, %rsi +; CHECK-NEXT: leaq 2(%rsi), %rax +; CHECK-NEXT: retq + %cmp = icmp ult i64 %x, 42 + %sel = select i1 %cmp, i64 1, i64 2 + %sub = add i64 %sel, %y + ret i64 %sub +} + +; No LEA with 8-bit, but this shouldn't need branches or cmov. + +define i8 @sel_1_neg1(i32 %x) { +; CHECK-LABEL: sel_1_neg1: +; CHECK: # %bb.0: +; CHECK-NEXT: cmpl $42, %edi +; CHECK-NEXT: setg %al +; CHECK-NEXT: shlb $2, %al +; CHECK-NEXT: decb %al +; CHECK-NEXT: retq + %cmp = icmp sgt i32 %x, 42 + %sel = select i1 %cmp, i8 3, i8 -1 + ret i8 %sel +} + +; We get an LEA for 16-bit because we ignore the high-bits. + +define i16 @sel_neg1_1(i32 %x) { +; CHECK-LABEL: sel_neg1_1: +; CHECK: # %bb.0: +; CHECK-NEXT: xorl %eax, %eax +; CHECK-NEXT: cmpl $43, %edi +; CHECK-NEXT: setl %al +; CHECK-NEXT: leal -1(,%rax,4), %eax +; CHECK-NEXT: # kill: def %ax killed %ax killed %eax +; CHECK-NEXT: retq + %cmp = icmp sgt i32 %x, 42 + %sel = select i1 %cmp, i16 -1, i16 3 + ret i16 %sel +} + +; If the comparison is available, the predicate can be inverted. + +define i32 @sel_1_neg1_32(i32 %x) { +; CHECK-LABEL: sel_1_neg1_32: +; CHECK: # %bb.0: +; CHECK-NEXT: xorl %eax, %eax +; CHECK-NEXT: cmpl $42, %edi +; CHECK-NEXT: setg %al +; CHECK-NEXT: leal -1(%rax,%rax,8), %eax +; CHECK-NEXT: retq + %cmp = icmp sgt i32 %x, 42 + %sel = select i1 %cmp, i32 8, i32 -1 + ret i32 %sel +} + +define i32 @sel_neg1_1_32(i32 %x) { +; CHECK-LABEL: sel_neg1_1_32: +; CHECK: # %bb.0: +; CHECK-NEXT: xorl %eax, %eax +; CHECK-NEXT: cmpl $43, %edi +; CHECK-NEXT: setl %al +; CHECK-NEXT: leal -7(%rax,%rax,8), %eax +; CHECK-NEXT: retq + %cmp = icmp sgt i32 %x, 42 + %sel = select i1 %cmp, i32 -7, i32 2 + ret i32 %sel +} + ; If the constants differ by a large power-of-2, that can be a shift of the difference plus the smaller constant. ; select Cond, C1, C2 --> add (mul (zext Cond), C1-C2), C2 define i8 @select_pow2_diff(i1 zeroext %cond) { ; CHECK-LABEL: select_pow2_diff: -; CHECK: # BB#0: -; CHECK-NEXT: testb %dil, %dil -; CHECK-NEXT: movb $19, %al -; CHECK-NEXT: jne .LBB22_2 -; CHECK-NEXT: # BB#1: -; CHECK-NEXT: movb $3, %al -; CHECK-NEXT: .LBB22_2: +; CHECK: # %bb.0: +; CHECK-NEXT: shlb $4, %dil +; CHECK-NEXT: orb $3, %dil +; CHECK-NEXT: movl %edi, %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i8 19, i8 3 ret i8 %sel @@ -276,11 +339,12 @@ define i8 @select_pow2_diff(i1 zeroext %cond) { define i16 @select_pow2_diff_invert(i1 zeroext %cond) { ; CHECK-LABEL: select_pow2_diff_invert: -; CHECK: # BB#0: -; CHECK-NEXT: testb %dil, %dil -; CHECK-NEXT: movw $7, %cx -; CHECK-NEXT: movw $71, %ax -; CHECK-NEXT: cmovnew %cx, %ax +; CHECK: # %bb.0: +; CHECK-NEXT: xorb $1, %dil +; CHECK-NEXT: movzbl %dil, %eax +; CHECK-NEXT: shll $6, %eax +; CHECK-NEXT: orl $7, %eax +; CHECK-NEXT: # kill: def %ax killed %ax killed %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i16 7, i16 71 ret i16 %sel @@ -288,11 +352,10 @@ define i16 @select_pow2_diff_invert(i1 zeroext %cond) { define i32 @select_pow2_diff_neg(i1 zeroext %cond) { ; CHECK-LABEL: select_pow2_diff_neg: -; CHECK: # BB#0: -; CHECK-NEXT: testb %dil, %dil -; CHECK-NEXT: movl $-9, %ecx -; CHECK-NEXT: movl $-25, %eax -; CHECK-NEXT: cmovnel %ecx, %eax +; CHECK: # %bb.0: +; CHECK-NEXT: shlb $4, %dil +; CHECK-NEXT: movzbl %dil, %eax +; CHECK-NEXT: orl $-25, %eax ; CHECK-NEXT: retq %sel = select i1 %cond, i32 -9, i32 -25 ret i32 %sel @@ -300,22 +363,40 @@ define i32 @select_pow2_diff_neg(i1 zeroext %cond) { define i64 @select_pow2_diff_neg_invert(i1 zeroext %cond) { ; CHECK-LABEL: select_pow2_diff_neg_invert: -; CHECK: # BB#0: -; CHECK-NEXT: testb %dil, %dil -; CHECK-NEXT: movl $29, %ecx -; CHECK-NEXT: movq $-99, %rax -; CHECK-NEXT: cmoveq %rcx, %rax +; CHECK: # %bb.0: +; CHECK-NEXT: xorb $1, %dil +; CHECK-NEXT: movzbl %dil, %eax +; CHECK-NEXT: shlq $7, %rax +; CHECK-NEXT: addq $-99, %rax ; CHECK-NEXT: retq %sel = select i1 %cond, i64 -99, i64 29 ret i64 %sel } +; This doesn't need a branch, but don't do the wrong thing if subtraction of the constants overflows. + +define i8 @sel_67_neg125(i32 %x) { +; CHECK-LABEL: sel_67_neg125: +; CHECK: # %bb.0: +; CHECK-NEXT: cmpl $42, %edi +; CHECK-NEXT: movb $67, %al +; CHECK-NEXT: jg .LBB31_2 +; CHECK-NEXT: # %bb.1: +; CHECK-NEXT: movb $-125, %al +; CHECK-NEXT: .LBB31_2: +; CHECK-NEXT: retq + %cmp = icmp sgt i32 %x, 42 + %sel = select i1 %cmp, i8 67, i8 -125 + ret i8 %sel +} + + ; In general, select of 2 constants could be: ; select Cond, C1, C2 --> add (mul (zext Cond), C1-C2), C2 --> add (and (sext Cond), C1-C2), C2 define i32 @select_C1_C2(i1 %cond) { ; CHECK-LABEL: select_C1_C2: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: testb $1, %dil ; CHECK-NEXT: movl $421, %ecx # imm = 0x1A5 ; CHECK-NEXT: movl $42, %eax @@ -327,8 +408,8 @@ define i32 @select_C1_C2(i1 %cond) { define i32 @select_C1_C2_zeroext(i1 zeroext %cond) { ; CHECK-LABEL: select_C1_C2_zeroext: -; CHECK: # BB#0: -; CHECK-NEXT: testb %dil, %dil +; CHECK: # %bb.0: +; CHECK-NEXT: testl %edi, %edi ; CHECK-NEXT: movl $421, %ecx # imm = 0x1A5 ; CHECK-NEXT: movl $42, %eax ; CHECK-NEXT: cmovnel %ecx, %eax @@ -339,7 +420,7 @@ define i32 @select_C1_C2_zeroext(i1 zeroext %cond) { define i32 @select_C1_C2_signext(i1 signext %cond) { ; CHECK-LABEL: select_C1_C2_signext: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: testb $1, %dil ; CHECK-NEXT: movl $421, %ecx # imm = 0x1A5 ; CHECK-NEXT: movl $42, %eax @@ -353,7 +434,7 @@ define i32 @select_C1_C2_signext(i1 signext %cond) { define i64 @select_2_or_inc(i64 %x) { ; CHECK-LABEL: select_2_or_inc: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: leaq 1(%rdi), %rax ; CHECK-NEXT: cmpq $2, %rdi ; CHECK-NEXT: cmoveq %rdi, %rax @@ -366,13 +447,13 @@ define i64 @select_2_or_inc(i64 %x) { define <4 x i32> @sel_constants_add_constant_vec(i1 %cond) { ; CHECK-LABEL: sel_constants_add_constant_vec: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: testb $1, %dil -; CHECK-NEXT: jne .LBB30_1 -; CHECK-NEXT: # BB#2: +; CHECK-NEXT: jne .LBB36_1 +; CHECK-NEXT: # %bb.2: ; CHECK-NEXT: movaps {{.*#+}} xmm0 = [12,13,14,15] ; CHECK-NEXT: retq -; CHECK-NEXT: .LBB30_1: +; CHECK-NEXT: .LBB36_1: ; CHECK-NEXT: movaps {{.*#+}} xmm0 = [4294967293,14,4,4] ; CHECK-NEXT: retq %sel = select i1 %cond, <4 x i32> <i32 -4, i32 12, i32 1, i32 0>, <4 x i32> <i32 11, i32 11, i32 11, i32 11> @@ -382,13 +463,13 @@ define <4 x i32> @sel_constants_add_constant_vec(i1 %cond) { define <2 x double> @sel_constants_fmul_constant_vec(i1 %cond) { ; CHECK-LABEL: sel_constants_fmul_constant_vec: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: testb $1, %dil -; CHECK-NEXT: jne .LBB31_1 -; CHECK-NEXT: # BB#2: +; CHECK-NEXT: jne .LBB37_1 +; CHECK-NEXT: # %bb.2: ; CHECK-NEXT: movaps {{.*#+}} xmm0 = [1.188300e+02,3.454000e+01] ; CHECK-NEXT: retq -; CHECK-NEXT: .LBB31_1: +; CHECK-NEXT: .LBB37_1: ; CHECK-NEXT: movaps {{.*#+}} xmm0 = [-2.040000e+01,3.768000e+01] ; CHECK-NEXT: retq %sel = select i1 %cond, <2 x double> <double -4.0, double 12.0>, <2 x double> <double 23.3, double 11.0> @@ -401,7 +482,7 @@ define <2 x double> @sel_constants_fmul_constant_vec(i1 %cond) { define i64 @opaque_constant(i1 %cond, i64 %x) { ; CHECK-LABEL: opaque_constant: -; CHECK: # BB#0: +; CHECK: # %bb.0: ; CHECK-NEXT: testb $1, %dil ; CHECK-NEXT: movl $23, %ecx ; CHECK-NEXT: movq $-4, %rax |