1 # RUN: llc -march=x86-64 -start-after branch-folder -stop-after branch-folder -o - %s | FileCheck %s 2 # This test ensures that the MIR parser parses the 'implicit' and 'implicit-def' 3 # register flags correctly. 4 5 --- | 6 7 define i32 @foo(i32 %a) { 8 entry: 9 %0 = icmp sle i32 %a, 10 10 br i1 %0, label %less, label %exit 11 12 less: 13 ret i32 0 14 15 exit: 16 ret i32 %a 17 } 18 19 define i1 @implicit_subregister1() { 20 entry: 21 ret i1 false 22 } 23 24 define i16 @implicit_subregister2() { 25 entry: 26 ret i16 0 27 } 28 29 ... 30 --- 31 name: foo 32 body: | 33 bb.0.entry: 34 successors: %bb.1.less, %bb.2.exit 35 ; CHECK: CMP32ri8 %edi, 10, implicit-def %eflags 36 ; CHECK-NEXT: JG_1 %bb.2.exit, implicit %eflags 37 CMP32ri8 %edi, 10, implicit-def %eflags 38 JG_1 %bb.2.exit, implicit %eflags 39 40 bb.1.less: 41 ; CHECK: %eax = MOV32r0 implicit-def %eflags 42 %eax = MOV32r0 implicit-def %eflags 43 RETQ %eax 44 45 bb.2.exit: 46 %eax = COPY %edi 47 RETQ %eax 48 ... 49 --- 50 name: implicit_subregister1 51 body: | 52 bb.0.entry: 53 ; Verify that the implicit register verifier won't report an error on implicit 54 ; subregisters. 55 ; CHECK-LABEL: name: implicit_subregister1 56 ; CHECK: dead %eax = XOR32rr undef %eax, undef %eax, implicit-def dead %eflags, implicit-def %al 57 dead %eax = XOR32rr undef %eax, undef %eax, implicit-def dead %eflags, implicit-def %al 58 RETQ killed %al 59 ... 60 --- 61 name: implicit_subregister2 62 body: | 63 bb.0.entry: 64 ; CHECK-LABEL: name: implicit_subregister2 65 ; CHECK: dead %r15 = XOR64rr undef %r15, undef %r15, implicit-def dead %eflags, implicit-def %r15w 66 dead %r15 = XOR64rr undef %r15, undef %r15, implicit-def dead %eflags, implicit-def %r15w 67 RETQ killed %r15w 68 ... 69
