Subzero, MIPS32: Intrinsic call Ctlz for i32

tests_lit/assembler/mips32/encoding_intrinsics.ll

-; Test encoding of MIPS32 floating point arithmetic instructions
+; Test encoding of MIPS32 instructions used in intrinsic calls
 
 ; REQUIRES: allow_dump
 
 ; Compile using standalone assembler.
 ; RUN: %p2i --filetype=asm -i %s --target=mips32 --args -O2 \
 ; RUN:   --allow-externally-defined-symbols --skip-unimplemented \
 ; RUN:   | FileCheck %s --check-prefix=ASM
 
 ; Show bytes in assembled standalone code.
 ; RUN: %p2i --filetype=asm -i %s --target=mips32 --assemble --disassemble \
 ; RUN:   --args -O2 --allow-externally-defined-symbols --skip-unimplemented \
 ; RUN:   | FileCheck %s --check-prefix=DIS
 
 ; Compile using integrated assembler.
 ; RUN: %p2i --filetype=iasm -i %s --target=mips32 --args -O2 \
 ; RUN:   --allow-externally-defined-symbols --skip-unimplemented \
 ; RUN:   | FileCheck %s --check-prefix=IASM
 
 ; Show bytes in assembled integrated code.
 ; RUN: %p2i --filetype=iasm -i %s --target=mips32 --assemble --disassemble \
 ; RUN:   --args -O2 --allow-externally-defined-symbols --skip-unimplemented \
 ; RUN:   | FileCheck %s --check-prefix=DIS
 
+declare i32 @llvm.ctlz.i32(i32, i1)
+declare void @llvm.trap()
+
+define internal i32 @encCtlz32(i32 %x) {
+entry:
+  %r = call i32 @llvm.ctlz.i32(i32 %x, i1 false)
+  ret i32 %r
+}
+
+; ASM-LABEL: encCtlz32
+; ASM-NEXT: .LencCtlz32$entry:
+; ASM-NEXT:     clz     $a0, $a0
+; ASM-NEXT:     move    $v0, $a0
+; ASM-NEXT:     jr      $ra
+
+; DIS-LABEL: 00000000 <encCtlz32>:
+; DIS-NEXT:    0:       70842020        clz     a0,a0
+; DIS-NEXT:    4:       00801021        move    v0,a0
+; DIS-NEXT:    8:       03e00008        jr      ra
+
+; IASM-LABEL: encCtlz32
+; IASM-NEXT: .LencCtlz32$entry:
+; IASM-NEXT:    .byte 0x20
+; IASM-NEXT:    .byte 0x20
+; IASM-NEXT:    .byte 0x84
+; IASM-NEXT:    .byte 0x70
+; IASM-NEXT:    .byte 0x21
+; IASM-NEXT:    .byte 0x10
+; IASM-NEXT:    .byte 0x80
+; IASM-NEXT:    .byte 0x0
+; IASM-NEXT:    .byte 0x8
+; IASM-NEXT:    .byte 0x0
+; IASM-NEXT:    .byte 0xe0
+; IASM-NEXT:    .byte 0x3
+
 define internal void @encTrap() {
   unreachable
 }
 
 ; ASM-LABEL: encTrap
 ; ASM-NEXT: .LencTrap$__0:
 ; ASM-NEXT:     teq     $zero, $zero, 0
 
-; DIS-LABEL: 00000000 <encTrap>:
-; DIS-NEXT:    0:       00000034        teq     zero,zero
+; DIS-LABEL: 00000010 <encTrap>:
+; DIS-NEXT:    10:      00000034        teq     zero,zero
 
 ; IASM-LABEL: encTrap:
 ; IASM-NEXT: .LencTrap$__0:
 ; IASM-NEXT:    .byte 0x34
 ; IASM-NEXT:    .byte 0x0
 ; IASM-NEXT:    .byte 0x0
 ; IASM-NEXT:    .byte 0x0