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; RUN: opt -lower-constant-intrinsics -S < %s | FileCheck %s
;; Ensure that an unfoldable is.constant gets lowered reasonably in
;; optimized codegen, in particular, that the "true" branch is
;; eliminated.
;; Also ensure that any unfoldable objectsize is resolved in order.
;; CHECK-NOT: tail call i32 @subfun_1()
;; CHECK: tail call i32 @subfun_2()
;; CHECK-NOT: tail call i32 @subfun_1()
declare i1 @llvm.is.constant.i32(i32 %a) nounwind readnone
declare i1 @llvm.is.constant.i64(i64 %a) nounwind readnone
declare i1 @llvm.is.constant.i256(i256 %a) nounwind readnone
declare i1 @llvm.is.constant.v2i64(<2 x i64> %a) nounwind readnone
declare i1 @llvm.is.constant.f32(float %a) nounwind readnone
declare i1 @llvm.is.constant.sl_i32i32s({i32, i32} %a) nounwind readnone
declare i1 @llvm.is.constant.a2i64([2 x i64] %a) nounwind readnone
declare i1 @llvm.is.constant.p0i64(i64* %a) nounwind readnone
declare i64 @llvm.objectsize.i64.p0i8(i8*, i1, i1, i1) nounwind readnone
declare i32 @subfun_1()
declare i32 @subfun_2()
define i32 @test_branch(i32 %in) nounwind {
%v = call i1 @llvm.is.constant.i32(i32 %in)
br i1 %v, label %True, label %False
True:
%call1 = tail call i32 @subfun_1()
ret i32 %call1
False:
%call2 = tail call i32 @subfun_2()
ret i32 %call2
}
;; llvm.objectsize is another tricky case which gets folded to -1 very
;; late in the game. We'd like to ensure that llvm.is.constant of
;; llvm.objectsize is true.
define i1 @test_objectsize(i8* %obj) nounwind {
;; CHECK-LABEL: test_objectsize
;; CHECK-NOT: llvm.objectsize
;; CHECK-NOT: llvm.is.constant
;; CHECK: ret i1 true
%os = call i64 @llvm.objectsize.i64.p0i8(i8* %obj, i1 false, i1 false, i1 false)
%os1 = add i64 %os, 1
%v = call i1 @llvm.is.constant.i64(i64 %os1)
ret i1 %v
}
@test_phi_a = dso_local global i32 0, align 4
declare dso_local i32 @test_phi_b(...)
; Function Attrs: nounwind uwtable
define dso_local i32 @test_phi() {
entry:
%0 = load i32, i32* @test_phi_a, align 4
%1 = tail call i1 @llvm.is.constant.i32(i32 %0)
br i1 %1, label %cond.end, label %cond.false
cond.false: ; preds = %entry
%call = tail call i32 bitcast (i32 (...)* @test_phi_b to i32 ()*)() #3
%.pre = load i32, i32* @test_phi_a, align 4
br label %cond.end
cond.end: ; preds = %entry, %cond.false
%2 = phi i32 [ %.pre, %cond.false ], [ %0, %entry ]
%cond = phi i32 [ %call, %cond.false ], [ 1, %entry ]
%cmp = icmp eq i32 %cond, %2
br i1 %cmp, label %cond.true1, label %cond.end4
cond.true1: ; preds = %cond.end
%call2 = tail call i32 bitcast (i32 (...)* @test_phi_b to i32 ()*)() #3
br label %cond.end4
cond.end4: ; preds = %cond.end, %cond.true1
ret i32 undef
}
define i1 @test_various_types(i256 %int, float %float, <2 x i64> %vec, {i32, i32} %struct, [2 x i64] %arr, i64* %ptr) #0 {
; CHECK-LABEL: @test_various_types(
; CHECK-NOT: llvm.is.constant
%v1 = call i1 @llvm.is.constant.i256(i256 %int)
%v2 = call i1 @llvm.is.constant.f32(float %float)
%v3 = call i1 @llvm.is.constant.v2i64(<2 x i64> %vec)
%v4 = call i1 @llvm.is.constant.sl_i32i32s({i32, i32} %struct)
%v5 = call i1 @llvm.is.constant.a2i64([2 x i64] %arr)
%v6 = call i1 @llvm.is.constant.p0i64(i64* %ptr)
%c1 = call i1 @llvm.is.constant.i256(i256 -1)
%c2 = call i1 @llvm.is.constant.f32(float 17.0)
%c3 = call i1 @llvm.is.constant.v2i64(<2 x i64> <i64 -1, i64 44>)
%c4 = call i1 @llvm.is.constant.sl_i32i32s({i32, i32} {i32 -1, i32 32})
%c5 = call i1 @llvm.is.constant.a2i64([2 x i64] [i64 -1, i64 32])
%c6 = call i1 @llvm.is.constant.p0i64(i64* inttoptr (i32 42 to i64*))
%x1 = add i1 %v1, %c1
%x2 = add i1 %v2, %c2
%x3 = add i1 %v3, %c3
%x4 = add i1 %v4, %c4
%x5 = add i1 %v5, %c5
%x6 = add i1 %v6, %c6
%res2 = add i1 %x1, %x2
%res3 = add i1 %res2, %x3
%res4 = add i1 %res3, %x4
%res5 = add i1 %res4, %x5
%res6 = add i1 %res5, %x6
ret i1 %res6
}
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