forked from OSchip/llvm-project
75 lines
3.0 KiB
LLVM
75 lines
3.0 KiB
LLVM
; RUN: llc -march=x86-64 -mcpu=core2 -fast-isel -enable-misched -misched=shuffle -misched-bottomup -verify-machineinstrs < %s
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; RUN: llc -march=x86-64 -mcpu=core2 -fast-isel -enable-misched -misched=shuffle -misched-topdown -verify-machineinstrs < %s
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; REQUIRES: asserts
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;
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; Test the LiveIntervals::handleMove() function.
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;
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; Moving the DIV32r instruction exercises the regunit update code because
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; %EDX has a live range into the function and is used by the DIV32r.
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;
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; Here sinking a kill + dead def:
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; 144B -> 180B: DIV32r %vreg4, %EAX<imp-def>, %EDX<imp-def,dead>, %EFLAGS<imp-def,dead>, %EAX<imp-use,kill>, %EDX<imp-use>
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; %vreg4: [48r,144r:0) 0@48r
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; --> [48r,180r:0) 0@48r
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; DH: [0B,16r:0)[128r,144r:2)[144r,144d:1) 0@0B-phi 1@144r 2@128r
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; --> [0B,16r:0)[128r,180r:2)[180r,180d:1) 0@0B-phi 1@180r 2@128r
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; DL: [0B,16r:0)[128r,144r:2)[144r,144d:1) 0@0B-phi 1@144r 2@128r
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; --> [0B,16r:0)[128r,180r:2)[180r,180d:1) 0@0B-phi 1@180r 2@128r
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;
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define i32 @f1(i32 %a, i32 %b, i32 %c, i32 %d) nounwind uwtable readnone ssp {
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entry:
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%y = add i32 %c, 1
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%x = udiv i32 %b, %a
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%add = add nsw i32 %y, %x
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ret i32 %add
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}
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; Same as above, but moving a kill + live def:
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; 144B -> 180B: DIV32r %vreg4, %EAX<imp-def,dead>, %EDX<imp-def>, %EFLAGS<imp-def,dead>, %EAX<imp-use,kill>, %EDX<imp-use>
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; %vreg4: [48r,144r:0) 0@48r
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; --> [48r,180r:0) 0@48r
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; DH: [0B,16r:0)[128r,144r:2)[144r,184r:1) 0@0B-phi 1@144r 2@128r
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; --> [0B,16r:0)[128r,180r:2)[180r,184r:1) 0@0B-phi 1@180r 2@128r
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; DL: [0B,16r:0)[128r,144r:2)[144r,184r:1) 0@0B-phi 1@144r 2@128r
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; --> [0B,16r:0)[128r,180r:2)[180r,184r:1) 0@0B-phi 1@180r 2@128r
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;
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define i32 @f2(i32 %a, i32 %b, i32 %c, i32 %d) nounwind uwtable readnone ssp {
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entry:
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%y = sub i32 %c, %d
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%x = urem i32 %b, %a
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%add = add nsw i32 %x, %y
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ret i32 %add
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}
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; Moving a use below the existing kill (%vreg5):
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; Moving a tied virtual register def (%vreg11):
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;
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; 96B -> 120B: %vreg11<def,tied1> = SUB32rr %vreg11<tied0>, %vreg5
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; %vreg11: [80r,96r:1)[96r,144r:0) 0@96r 1@80r
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; --> [80r,120r:1)[120r,144r:0) 0@120r 1@80r
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; %vreg5: [16r,112r:0) 0@16r
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; --> [16r,120r:0) 0@16r
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;
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define i32 @f3(i32 %a, i32 %b, i32 %c, i32 %d) nounwind uwtable readnone ssp {
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entry:
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%y = sub i32 %a, %b
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%x = add i32 %a, %b
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%r = mul i32 %x, %y
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ret i32 %r
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}
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; Move EFLAGS dead def across another def:
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; handleMove 208B -> 36B: %EDX<def> = MOV32r0 %EFLAGS<imp-def,dead>
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; EFLAGS: [20r,20d:4)[160r,160d:3)[208r,208d:0)[224r,224d:1)[272r,272d:2)[304r,304d:5) 0@208r 1@224r 2@272r 3@160r 4@20r 5@304r
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; --> [20r,20d:4)[36r,36d:0)[160r,160d:3)[224r,224d:1)[272r,272d:2)[304r,304d:5) 0@36r 1@224r 2@272r 3@160r 4@20r 5@304r
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;
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define i32 @f4(i32 %a, i32 %b, i32 %c, i32 %d) nounwind uwtable readnone ssp {
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entry:
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%x = sub i32 %a, %b
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%y = sub i32 %b, %c
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%z = sub i32 %c, %d
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%r1 = udiv i32 %x, %y
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%r2 = mul i32 %z, %r1
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ret i32 %r2
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}
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