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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -O2 | FileCheck %s
; Test for issue #160612: OR conditions in branches should use multiple branches
; instead of materializing booleans with SETCC when no special optimizations apply.
declare void @subroutine_foo()
declare void @subroutine_bar()
; Original issue: (x == 0 || y == 0) was generating SETCC + TEST + BRANCH
; instead of using two conditional branches directly.
define void @func_a(i32 noundef %x, i32 noundef %y) {
; CHECK-LABEL: func_a:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: testl %edi, %edi
; CHECK-NEXT: je subroutine_foo@PLT # TAILCALL
; CHECK-NEXT: # %bb.1: # %entry
; CHECK-NEXT: testl %esi, %esi
; CHECK-NEXT: jne subroutine_bar@PLT # TAILCALL
; CHECK-NEXT: # %bb.2: # %if.then
; CHECK-NEXT: jmp subroutine_foo@PLT # TAILCALL
entry:
%cmp = icmp eq i32 %x, 0
%cmp1 = icmp eq i32 %y, 0
%or.cond = or i1 %cmp, %cmp1
br i1 %or.cond, label %if.then, label %if.else
if.then:
tail call void @subroutine_foo()
br label %if.end
if.else:
tail call void @subroutine_bar()
br label %if.end
if.end:
ret void
}
; Reference implementation that already generated optimal code.
; This should continue to generate the same optimal code.
define void @func_b(i32 noundef %x, i32 noundef %y) {
; CHECK-LABEL: func_b:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: testl %edi, %edi
; CHECK-NEXT: je subroutine_foo@PLT # TAILCALL
; CHECK-NEXT: # %bb.1: # %if.else
; CHECK-NEXT: testl %esi, %esi
; CHECK-NEXT: je subroutine_foo@PLT # TAILCALL
; CHECK-NEXT: # %bb.2: # %if.else3
; CHECK-NEXT: jmp subroutine_bar@PLT # TAILCALL
entry:
%cmp = icmp eq i32 %x, 0
br i1 %cmp, label %if.then, label %if.else
if.then:
tail call void @subroutine_foo()
br label %if.end4
if.else:
%cmp1 = icmp eq i32 %y, 0
br i1 %cmp1, label %if.then2, label %if.else3
if.then2:
tail call void @subroutine_foo()
br label %if.end4
if.else3:
tail call void @subroutine_bar()
br label %if.end4
if.end4:
ret void
}
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