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|
; RUN: llc < %s -march=lanai | FileCheck %s
; Test the alu setcc combiner.
; TODO: Enhance combiner to handle this case. This expands into:
; sub %r7, %r6, %r3
; sub.f %r7, %r6, %r0
; sel.eq %r18, %r3, %rv
; This is different from the pattern currently matched. If the lowered form had
; been sub.f %r3, 0, %r0 then it would have matched.
; Function Attrs: norecurse nounwind readnone
define i32 @test0a(i32 inreg %a, i32 inreg %b, i32 inreg %c, i32 inreg %d) #0 {
entry:
%sub = sub i32 %b, %a
%cmp = icmp eq i32 %sub, 0
%cond = select i1 %cmp, i32 %c, i32 %sub
ret i32 %cond
}
; CHECK-LABEL: test0a
; CHECK: sub.f %r7
; CHECK: sel.eq
; Function Attrs: norecurse nounwind readnone
define i32 @test0b(i32 inreg %a, i32 inreg %b, i32 inreg %c, i32 inreg %d) #0 {
entry:
%cmp = icmp eq i32 %b, %a
%cond = select i1 %cmp, i32 %c, i32 %b
ret i32 %cond
}
; CHECK-LABEL: test0b
; CHECK: sub.f %r7, %r6, %r0
; CHECK-NEXT: sel.eq
; Function Attrs: norecurse nounwind readnone
define i32 @test1a(i32 inreg %a, i32 inreg %b, i32 inreg %c, i32 inreg %d) #0 {
entry:
%sub = sub i32 %b, %a
%cmp = icmp slt i32 %sub, 0
%cond = select i1 %cmp, i32 %c, i32 %d
ret i32 %cond
}
; CHECK-LABEL: test1a
; CHECK: sub.f %r7, %r6
; CHECK-NEXT: sel.mi
; Function Attrs: norecurse nounwind readnone
define i32 @test1b(i32 inreg %a, i32 inreg %b, i32 inreg %c, i32 inreg %d) #0 {
entry:
%sub = sub i32 %b, %a
%cmp = icmp slt i32 %sub, 0
%cond = select i1 %cmp, i32 %c, i32 %d
ret i32 %cond
}
; CHECK-LABEL: test1b
; CHECK: sub.f %r7, %r6
; CHECK-NEXT: sel.mi
; Function Attrs: norecurse nounwind readnone
define i32 @test2a(i32 inreg %a, i32 inreg %b, i32 inreg %c, i32 inreg %d) #0 {
entry:
%sub = sub i32 %b, %a
%cmp = icmp sgt i32 %sub, -1
%cond = select i1 %cmp, i32 %c, i32 %d
ret i32 %cond
}
; CHECK-LABEL: test2a
; CHECK: sub.f %r7, %r6
; CHECK: sel.pl
; Function Attrs: norecurse nounwind readnone
define i32 @test2b(i32 inreg %a, i32 inreg %b, i32 inreg %c, i32 inreg %d) #0 {
entry:
%sub = sub i32 %b, %a
%cmp = icmp sgt i32 %sub, -1
%cond = select i1 %cmp, i32 %c, i32 %d
ret i32 %cond
}
; CHECK-LABEL: test2b
; CHECK: sub.f %r7, %r6
; CHECK: sel.pl
; Function Attrs: norecurse nounwind readnone
define i32 @test3(i32 inreg %a, i32 inreg %b, i32 inreg %c, i32 inreg %d) #0 {
entry:
%sub = sub i32 %b, %a
%cmp = icmp slt i32 %sub, 1
%cond = select i1 %cmp, i32 %c, i32 %d
ret i32 %cond
}
; Function Attrs: norecurse nounwind readnone
define i32 @test4(i32 inreg %a, i32 inreg %b, i32 inreg %c, i32 inreg %d) #0 {
entry:
%cmp = icmp ne i32 %a, 0
%cmp1 = icmp ult i32 %a, %b
%or.cond = and i1 %cmp, %cmp1
br i1 %or.cond, label %return, label %if.end
if.end: ; preds = %entry
%cmp2 = icmp ne i32 %b, 0
%cmp4 = icmp ult i32 %b, %c
%or.cond29 = and i1 %cmp2, %cmp4
br i1 %or.cond29, label %return, label %if.end6
if.end6: ; preds = %if.end
%cmp7 = icmp ne i32 %c, 0
%cmp9 = icmp ult i32 %c, %d
%or.cond30 = and i1 %cmp7, %cmp9
br i1 %or.cond30, label %return, label %if.end11
if.end11: ; preds = %if.end6
%cmp12 = icmp ne i32 %d, 0
%cmp14 = icmp ult i32 %d, %a
%or.cond31 = and i1 %cmp12, %cmp14
%b. = select i1 %or.cond31, i32 %b, i32 21
ret i32 %b.
return: ; preds = %if.end6, %if.end, %entry
%retval.0 = phi i32 [ %c, %entry ], [ %d, %if.end ], [ %a, %if.end6 ]
ret i32 %retval.0
}
; CHECK-LABEL: test4
; TODO: Re-enable test. This test is disabled post making the combiner more
; conservative.
; DISABLED_CHECK: and.f
; Test to avoid incorrect fusing that spans across basic blocks
@a = global i32 -1, align 4
@b = global i32 0, align 4
; Function Attrs: nounwind
define void @testBB() {
entry:
%0 = load i32, i32* @a, align 4, !tbaa !1
%1 = load i32, i32* @b, align 4, !tbaa !1
%sub.i = sub i32 %1, %0
%tobool = icmp sgt i32 %sub.i, -1
br i1 %tobool, label %if.end, label %if.then
if.then: ; preds = %entry
%call1 = tail call i32 bitcast (i32 (...)* @g to i32 ()*)()
br label %while.body
while.body: ; preds = %if.then, %while.body
br label %while.body
if.end: ; preds = %entry
%cmp.i = icmp slt i32 %sub.i, 1
br i1 %cmp.i, label %if.then4, label %if.end7
if.then4: ; preds = %if.end
%call5 = tail call i32 bitcast (i32 (...)* @g to i32 ()*)()
br label %while.body6
while.body6: ; preds = %if.then4, %while.body6
br label %while.body6
if.end7: ; preds = %if.end
ret void
}
declare i32 @g(...)
; CHECK-LABEL: testBB
; CHECK: sub.f {{.*}}, %r0
!1 = !{!2, !2, i64 0}
!2 = !{!"int", !3, i64 0}
!3 = !{!"omnipotent char", !4, i64 0}
!4 = !{!"Simple C/C++ TBAA"}
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