185 lines
6.7 KiB
LLVM
185 lines
6.7 KiB
LLVM
; RUN: llc -mtriple=thumbv8 -arm-disable-cgp=false %s -o - | FileCheck %s
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; RUN: llc -mtriple=armv8 -arm-disable-cgp=false %s -o - | FileCheck %s
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; Check that the pass doesn't try to promote the immediate parameters.
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; CHECK-COMMON-LABEL: call_with_imms
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; CHECK-COMMON-NOT: uxt
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define i8 @call_with_imms(i8* %arg) {
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%call = tail call arm_aapcs_vfpcc zeroext i8 @dummy2(i8* nonnull %arg, i8 zeroext 0, i8 zeroext 0)
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%cmp = icmp eq i8 %call, 0
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%res = select i1 %cmp, i8 %call, i8 1
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ret i8 %res
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}
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; Test that the call result is still extended.
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; CHECK-COMMON-LABEL: test_call:
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; CHECK-COMMON: bl
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; CHECK-COMMONNEXT: sxtb r1, r0
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define i16 @test_call(i8 zeroext %arg) {
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%call = call i8 @dummy_i8(i8 %arg)
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%cmp = icmp ult i8 %call, 128
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%conv = zext i1 %cmp to i16
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ret i16 %conv
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}
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; Test that the transformation bails when it finds that i16 is larger than i8.
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; TODO: We should be able to remove the uxtb in these cases.
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; CHECK-LABEL: promote_i8_sink_i16_1
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; CHECK-COMMON: bl dummy_i8
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; CHECK-COMMON: adds r0, #1
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; CHECK-COMMON: uxtb r0, r0
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; CHECK-COMMON: cmp r0
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define i16 @promote_i8_sink_i16_1(i8 zeroext %arg0, i16 zeroext %arg1, i16 zeroext %arg2) {
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%call = tail call zeroext i8 @dummy_i8(i8 %arg0)
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%add = add nuw i8 %call, 1
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%conv = zext i8 %add to i16
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%cmp = icmp ne i16 %conv, %arg1
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%sel = select i1 %cmp, i16 %arg1, i16 %arg2
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%res = tail call zeroext i16 @dummy3(i16 %sel)
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ret i16 %res
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}
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; CHECK-COMMON-LABEL: promote_i8_sink_i16_2
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; CHECK-COMMON: bl dummy_i8
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; CHECK-COMMON: adds r0, #1
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; CHECK-COMMON-NOT: uxt
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; CHECK-COMMON: cmp r0
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define i16 @promote_i8_sink_i16_2(i8 zeroext %arg0, i8 zeroext %arg1, i16 zeroext %arg2) {
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%call = tail call zeroext i8 @dummy_i8(i8 %arg0)
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%add = add nuw i8 %call, 1
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%cmp = icmp ne i8 %add, %arg1
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%conv = zext i8 %arg1 to i16
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%sel = select i1 %cmp, i16 %conv, i16 %arg2
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%res = tail call zeroext i16 @dummy3(i16 %sel)
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ret i16 %res
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}
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@uc = global i8 42, align 1
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@LL = global i64 0, align 8
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; CHECK-COMMON-LABEL: zext_i64
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; CHECK-COMMON: ldrb
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; CHECK-COMMON: strd
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define void @zext_i64() {
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entry:
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%0 = load i8, i8* @uc, align 1
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%conv = zext i8 %0 to i64
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store i64 %conv, i64* @LL, align 8
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%cmp = icmp eq i8 %0, 42
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%conv1 = zext i1 %cmp to i32
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%call = tail call i32 bitcast (i32 (...)* @assert to i32 (i32)*)(i32 %conv1)
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ret void
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}
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@a = global i16* null, align 4
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@b = global i32 0, align 4
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; CHECK-COMMON-LABEL: constexpr
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; CHECK-COMMON: uxth
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define i32 @constexpr() {
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entry:
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store i32 ptrtoint (i32* @b to i32), i32* @b, align 4
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%0 = load i16*, i16** @a, align 4
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%1 = load i16, i16* %0, align 2
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%or = or i16 %1, ptrtoint (i32* @b to i16)
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store i16 %or, i16* %0, align 2
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%cmp = icmp ne i16 %or, 4
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%conv3 = zext i1 %cmp to i32
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%call = tail call i32 bitcast (i32 (...)* @e to i32 (i32)*)(i32 %conv3) #2
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ret i32 undef
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}
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; The call to safe_lshift_func takes two parameters, but they're the same value just one is zext.
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; The transform won't happen because of the zext.
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; CHECK-COMMON-LABEL: call_zext_i8_i32
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; CHECK-COMMON-NOT: uxt
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; CHECK-COMMON: cmp
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; CHECK-COMMON: uxtb
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define fastcc i32 @call_zext_i8_i32(i32 %p_45, i8 zeroext %p_46) {
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for.cond8.preheader:
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%call217 = call fastcc zeroext i8 @safe_mul_func_uint8_t_u_u(i8 zeroext undef)
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%tobool219 = icmp eq i8 %call217, 0
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br i1 %tobool219, label %for.end411, label %for.cond273.preheader
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for.cond273.preheader: ; preds = %for.cond8.preheader
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%call217.lcssa = phi i8 [ %call217, %for.cond8.preheader ]
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%conv218.le = zext i8 %call217.lcssa to i32
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%call346 = call fastcc zeroext i8 @safe_lshift_func(i8 zeroext %call217.lcssa, i32 %conv218.le)
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unreachable
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for.end411: ; preds = %for.cond8.preheader
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%call452 = call fastcc i64 @safe_sub_func_int64_t_s_s(i64 undef, i64 4)
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unreachable
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}
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%struct.anon = type { i32 }
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@g_57 = hidden local_unnamed_addr global %struct.anon zeroinitializer, align 4
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@g_893 = hidden local_unnamed_addr global %struct.anon zeroinitializer, align 4
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@g_82 = hidden local_unnamed_addr global i32 0, align 4
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; Test that the transform bails on finding %conv4, a trunc
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; CHECK-COMMON-LABEL: call_return_pointer
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; CHECK-COMMON: sxth
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; CHECK-COMMON-NOT: uxt
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define hidden i32 @call_return_pointer(i8 zeroext %p_13) local_unnamed_addr #0 {
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entry:
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%conv1 = zext i8 %p_13 to i16
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%call = tail call i16** @func_62(i8 zeroext undef, i32 undef, i16 signext %conv1, i32* undef)
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%0 = load i32, i32* getelementptr inbounds (%struct.anon, %struct.anon* @g_893, i32 0, i32 0), align 4
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%conv2 = trunc i32 %0 to i16
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br label %for.cond
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for.cond: ; preds = %for.cond.backedge, %entry
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%p_13.addr.0 = phi i8 [ %p_13, %entry ], [ %p_13.addr.0.be, %for.cond.backedge ]
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%tobool = icmp eq i8 %p_13.addr.0, 0
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br i1 %tobool, label %for.cond.backedge, label %if.then
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for.cond.backedge: ; preds = %for.cond, %if.then
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%p_13.addr.0.be = phi i8 [ %conv4, %if.then ], [ 0, %for.cond ]
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br label %for.cond
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if.then: ; preds = %for.cond
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%call3 = tail call fastcc signext i16 @safe_sub_func_int16_t_s_s(i16 signext %conv2)
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%conv4 = trunc i16 %call3 to i8
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br label %for.cond.backedge
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}
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; Transform will bail because of the zext
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; Check that d.sroa.0.0.be is promoted passed directly into the tail call.
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; CHECK-COMMON-LABEL: check_zext_phi_call_arg
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; CHECK-COMMON: uxt
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; CHECK-COMMON: uxt
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define i32 @check_zext_phi_call_arg() {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.cond.backedge, %entry
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%d.sroa.0.0 = phi i16 [ 30, %entry ], [ %d.sroa.0.0.be, %for.cond.backedge ]
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%tobool = icmp eq i16 %d.sroa.0.0, 0
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br i1 %tobool, label %for.cond.backedge, label %if.then
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for.cond.backedge: ; preds = %for.cond, %if.then
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%d.sroa.0.0.be = phi i16 [ %call, %if.then ], [ 0, %for.cond ]
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br label %for.cond
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if.then: ; preds = %for.cond
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%d.sroa.0.0.insert.ext = zext i16 %d.sroa.0.0 to i32
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%call = tail call zeroext i16 bitcast (i16 (...)* @f to i16 (i32)*)(i32 %d.sroa.0.0.insert.ext) #2
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br label %for.cond.backedge
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}
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declare i32 @assert(...)
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declare i8 @dummy_i8(i8)
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declare i8 @dummy2(i8*, i8, i8)
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declare i16 @dummy3(i16)
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declare dso_local i32 @e(...) local_unnamed_addr #1
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declare dso_local zeroext i16 @f(...) local_unnamed_addr #1
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declare noalias i16** @func_62(i8 zeroext %p_63, i32 %p_64, i16 signext %p_65, i32* nocapture readnone %p_66)
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declare fastcc signext i16 @safe_sub_func_int16_t_s_s(i16 signext %si2)
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declare dso_local fastcc i64 @safe_sub_func_int64_t_s_s(i64, i64)
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declare dso_local fastcc zeroext i8 @safe_lshift_func(i8 zeroext, i32)
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declare dso_local fastcc zeroext i8 @safe_mul_func_uint8_t_u_u(i8 returned zeroext)
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