phi-of-extractvalues.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -instcombine < %s | FileCheck %s
declare void @usei32(i32)
; If we have a phi of extractvalues, we can sink it,
; Here, we only need a PHI for extracted values.
define i32 @test0({ i32, i32 } %agg_left, { i32, i32 } %agg_right, i1 %c) {
; CHECK-LABEL: @test0(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: right:
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[AGG_LEFT_PN:%.*]] = phi { i32, i32 } [ [[AGG_LEFT:%.*]], [[LEFT]] ], [ [[AGG_RIGHT:%.*]], [[RIGHT]] ]
; CHECK-NEXT: [[R:%.*]] = extractvalue { i32, i32 } [[AGG_LEFT_PN]], 0
; CHECK-NEXT: ret i32 [[R]]
;
entry:
br i1 %c, label %left, label %right
left:
%i0 = extractvalue { i32, i32 } %agg_left, 0
br label %end
right:
%i1 = extractvalue { i32, i32 } %agg_right, 0
br label %end
end:
%r = phi i32 [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}
; But only if the extractvalues have no extra uses
define i32 @test1_extrause0({ i32, i32 } %agg_left, { i32, i32 } %agg_right, i1 %c) {
; CHECK-LABEL: @test1_extrause0(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: [[I0:%.*]] = extractvalue { i32, i32 } [[AGG_LEFT:%.*]], 0
; CHECK-NEXT: call void @usei32(i32 [[I0]])
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: right:
; CHECK-NEXT: [[I1:%.*]] = extractvalue { i32, i32 } [[AGG_RIGHT:%.*]], 0
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[I0]], [[LEFT]] ], [ [[I1]], [[RIGHT]] ]
; CHECK-NEXT: ret i32 [[R]]
;
entry:
br i1 %c, label %left, label %right
left:
%i0 = extractvalue { i32, i32 } %agg_left, 0
call void @usei32(i32 %i0)
br label %end
right:
%i1 = extractvalue { i32, i32 } %agg_right, 0
br label %end
end:
%r = phi i32 [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}
define i32 @test2_extrause1({ i32, i32 } %agg_left, { i32, i32 } %agg_right, i1 %c) {
; CHECK-LABEL: @test2_extrause1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: [[I0:%.*]] = extractvalue { i32, i32 } [[AGG_LEFT:%.*]], 0
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: right:
; CHECK-NEXT: [[I1:%.*]] = extractvalue { i32, i32 } [[AGG_RIGHT:%.*]], 0
; CHECK-NEXT: call void @usei32(i32 [[I1]])
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[I0]], [[LEFT]] ], [ [[I1]], [[RIGHT]] ]
; CHECK-NEXT: ret i32 [[R]]
;
entry:
br i1 %c, label %left, label %right
left:
%i0 = extractvalue { i32, i32 } %agg_left, 0
br label %end
right:
%i1 = extractvalue { i32, i32 } %agg_right, 0
call void @usei32(i32 %i1)
br label %end
end:
%r = phi i32 [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}
define i32 @test3_extrause2({ i32, i32 } %agg_left, { i32, i32 } %agg_right, i1 %c) {
; CHECK-LABEL: @test3_extrause2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: [[I0:%.*]] = extractvalue { i32, i32 } [[AGG_LEFT:%.*]], 0
; CHECK-NEXT: call void @usei32(i32 [[I0]])
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: right:
; CHECK-NEXT: [[I1:%.*]] = extractvalue { i32, i32 } [[AGG_RIGHT:%.*]], 0
; CHECK-NEXT: call void @usei32(i32 [[I1]])
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[I0]], [[LEFT]] ], [ [[I1]], [[RIGHT]] ]
; CHECK-NEXT: ret i32 [[R]]
;
entry:
br i1 %c, label %left, label %right
left:
%i0 = extractvalue { i32, i32 } %agg_left, 0
call void @usei32(i32 %i0)
br label %end
right:
%i1 = extractvalue { i32, i32 } %agg_right, 0
call void @usei32(i32 %i1)
br label %end
end:
%r = phi i32 [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}
; But the indicies must match
define i32 @test4({ i32, i32 } %agg_left, { i32, i32 } %agg_right, i1 %c) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: [[I0:%.*]] = extractvalue { i32, i32 } [[AGG_LEFT:%.*]], 0
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: right:
; CHECK-NEXT: [[I1:%.*]] = extractvalue { i32, i32 } [[AGG_RIGHT:%.*]], 1
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[I0]], [[LEFT]] ], [ [[I1]], [[RIGHT]] ]
; CHECK-NEXT: ret i32 [[R]]
;
entry:
br i1 %c, label %left, label %right
left:
%i0 = extractvalue { i32, i32 } %agg_left, 0
br label %end
right:
%i1 = extractvalue { i32, i32 } %agg_right, 1
br label %end
end:
%r = phi i32 [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}
; More complex aggregates are fine, too, as long as indicies match.
define i32 @test5({{ i32, i32 }, { i32, i32 }} %agg_left, {{ i32, i32 }, { i32, i32 }} %agg_right, i1 %c) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: right:
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[AGG_LEFT_PN:%.*]] = phi { { i32, i32 }, { i32, i32 } } [ [[AGG_LEFT:%.*]], [[LEFT]] ], [ [[AGG_RIGHT:%.*]], [[RIGHT]] ]
; CHECK-NEXT: [[R:%.*]] = extractvalue { { i32, i32 }, { i32, i32 } } [[AGG_LEFT_PN]], 0, 0
; CHECK-NEXT: ret i32 [[R]]
;
entry:
br i1 %c, label %left, label %right
left:
%i0 = extractvalue {{ i32, i32 }, { i32, i32 }} %agg_left, 0, 0
br label %end
right:
%i1 = extractvalue {{ i32, i32 }, { i32, i32 }} %agg_right, 0, 0
br label %end
end:
%r = phi i32 [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}
; The indicies must fully match, on all levels.
define i32 @test6({{ i32, i32 }, { i32, i32 }} %agg_left, {{ i32, i32 }, { i32, i32 }} %agg_right, i1 %c) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: [[I0:%.*]] = extractvalue { { i32, i32 }, { i32, i32 } } [[AGG_LEFT:%.*]], 0, 0
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: right:
; CHECK-NEXT: [[I1:%.*]] = extractvalue { { i32, i32 }, { i32, i32 } } [[AGG_RIGHT:%.*]], 0, 1
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[I0]], [[LEFT]] ], [ [[I1]], [[RIGHT]] ]
; CHECK-NEXT: ret i32 [[R]]
;
entry:
br i1 %c, label %left, label %right
left:
%i0 = extractvalue {{ i32, i32 }, { i32, i32 }} %agg_left, 0, 0
br label %end
right:
%i1 = extractvalue {{ i32, i32 }, { i32, i32 }} %agg_right, 0, 1
br label %end
end:
%r = phi i32 [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}
define i32 @test7({{ i32, i32 }, { i32, i32 }} %agg_left, {{ i32, i32 }, { i32, i32 }} %agg_right, i1 %c) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: [[I0:%.*]] = extractvalue { { i32, i32 }, { i32, i32 } } [[AGG_LEFT:%.*]], 0, 0
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: right:
; CHECK-NEXT: [[I1:%.*]] = extractvalue { { i32, i32 }, { i32, i32 } } [[AGG_RIGHT:%.*]], 1, 0
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[I0]], [[LEFT]] ], [ [[I1]], [[RIGHT]] ]
; CHECK-NEXT: ret i32 [[R]]
;
entry:
br i1 %c, label %left, label %right
left:
%i0 = extractvalue {{ i32, i32 }, { i32, i32 }} %agg_left, 0, 0
br label %end
right:
%i1 = extractvalue {{ i32, i32 }, { i32, i32 }} %agg_right, 1, 0
br label %end
end:
%r = phi i32 [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}
define i32 @test8({{ i32, i32 }, { i32, i32 }} %agg_left, {{ i32, i32 }, { i32, i32 }} %agg_right, i1 %c) {
; CHECK-LABEL: @test8(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: [[I0:%.*]] = extractvalue { { i32, i32 }, { i32, i32 } } [[AGG_LEFT:%.*]], 0, 0
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: right:
; CHECK-NEXT: [[I1:%.*]] = extractvalue { { i32, i32 }, { i32, i32 } } [[AGG_RIGHT:%.*]], 1, 1
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[I0]], [[LEFT]] ], [ [[I1]], [[RIGHT]] ]
; CHECK-NEXT: ret i32 [[R]]
;
entry:
br i1 %c, label %left, label %right
left:
%i0 = extractvalue {{ i32, i32 }, { i32, i32 }} %agg_left, 0, 0
br label %end
right:
%i1 = extractvalue {{ i32, i32 }, { i32, i32 }} %agg_right, 1, 1
br label %end
end:
%r = phi i32 [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}
; Also, unlike PHI-of-insertvalues, here the base aggregates of extractvalue
; can have different types, and just checking the indicies is not enough.
define i32 @test9({ i32, i32 } %agg_left, { i32, { i32, i32 } } %agg_right, i1 %c) {
; CHECK-LABEL: @test9(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: [[I0:%.*]] = extractvalue { i32, i32 } [[AGG_LEFT:%.*]], 0
; CHECK-NEXT: br label [[END:%.*]]
; CHECK: right:
; CHECK-NEXT: [[I1:%.*]] = extractvalue { i32, { i32, i32 } } [[AGG_RIGHT:%.*]], 0
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[I0]], [[LEFT]] ], [ [[I1]], [[RIGHT]] ]
; CHECK-NEXT: ret i32 [[R]]
;
entry:
br i1 %c, label %left, label %right
left:
%i0 = extractvalue { i32, i32 } %agg_left, 0
br label %end
right:
%i1 = extractvalue { i32, { i32, i32 } } %agg_right, 0
br label %end
end:
%r = phi i32 [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}
; It is fine if there are multiple uses of the PHI's value, as long as they are all in the PHI node itself
define i32 @test10({ i32, i32 } %agg_left, { i32, i32 } %agg_right, i1 %c0, i1 %c1) {
; CHECK-LABEL: @test10(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 [[C0:%.*]], label [[END:%.*]], label [[DISPATCH:%.*]]
; CHECK: dispatch:
; CHECK-NEXT: br i1 [[C1:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: br label [[END]]
; CHECK: right:
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[AGG_LEFT_PN:%.*]] = phi { i32, i32 } [ [[AGG_LEFT:%.*]], [[ENTRY:%.*]] ], [ [[AGG_LEFT]], [[LEFT]] ], [ [[AGG_RIGHT:%.*]], [[RIGHT]] ]
; CHECK-NEXT: [[R:%.*]] = extractvalue { i32, i32 } [[AGG_LEFT_PN]], 0
; CHECK-NEXT: ret i32 [[R]]
;
entry:
%i0 = extractvalue { i32, i32 } %agg_left, 0
%i1 = extractvalue { i32, i32 } %agg_right, 0
br i1 %c0, label %end, label %dispatch
dispatch:
br i1 %c1, label %left, label %right
left:
br label %end
right:
br label %end
end:
%r = phi i32 [ %i0, %entry ], [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}
; Which isn't the case here, there is a legitimate external use.
define i32 @test11({ i32, i32 } %agg_left, { i32, i32 } %agg_right, i1 %c0, i1 %c1) {
; CHECK-LABEL: @test11(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[I0:%.*]] = extractvalue { i32, i32 } [[AGG_LEFT:%.*]], 0
; CHECK-NEXT: [[I1:%.*]] = extractvalue { i32, i32 } [[AGG_RIGHT:%.*]], 0
; CHECK-NEXT: call void @usei32(i32 [[I0]])
; CHECK-NEXT: br i1 [[C0:%.*]], label [[END:%.*]], label [[DISPATCH:%.*]]
; CHECK: dispatch:
; CHECK-NEXT: br i1 [[C1:%.*]], label [[LEFT:%.*]], label [[RIGHT:%.*]]
; CHECK: left:
; CHECK-NEXT: br label [[END]]
; CHECK: right:
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: [[R:%.*]] = phi i32 [ [[I0]], [[ENTRY:%.*]] ], [ [[I0]], [[LEFT]] ], [ [[I1]], [[RIGHT]] ]
; CHECK-NEXT: ret i32 [[R]]
;
entry:
%i0 = extractvalue { i32, i32 } %agg_left, 0
%i1 = extractvalue { i32, i32 } %agg_right, 0
call void @usei32(i32 %i0)
br i1 %c0, label %end, label %dispatch
dispatch:
br i1 %c1, label %left, label %right
left:
br label %end
right:
br label %end
end:
%r = phi i32 [ %i0, %entry ], [ %i0, %left ], [ %i1, %right ]
ret i32 %r
}